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A s we launch the first issue of Volume 3 of JACS Au, we reflect on the past 12 months and look forward to upcoming milestones in 2023.The year 2022 was the first since 2019 where global research operated under a mostly normal cycle, though undoubtedly, many laboratories still faced supply chain shortages, and in some areas of the world there were continued COVID lockdowns.Last year was also the second year of publication of JACS Au, marked by a growing number of new authors and new reviewers at the journal.Published output was contributed by authors from 39 countries and regions on all continents.Papers with authors working in Europe were most abundant, followed by papers with authors in Asia and then North America.Submission growth was strong, resulting in an increase in publications over 2021 of 16%.In 2022, we published 249 Letters, Articles, and Perspectives, and expect to see similar growth in 2023, as more people become aware of the journal and the visibility afforded by open access publishing.JACS Au seeks to cover all of chemistry and its allied fields with a scope that includes the whole of the ACS Publications portfolio.To highlight the diversity of topics covered by JACS Au, we collated a range of Virtual Issues in 2022, including issues covering Emerging Chemistry & Machine Learning (May), 1 New Chemical Tools for Diagnosis and Treatment of Cancers (May), 2 Metal-Organic Frameworks & Covalent Organic Frameworks: Emerging Advances and Applications (July), 3 and Emerging Discoveries in Polymer Science and Soft Matter (September). 4We also partnered with other ACS journals in Virtual Issues covering Tuberculosis Drug Discovery and Diagnosis, Prevention and Treatment of Malaria, 40 Years of GenBank, and Bioorthogonal and Click Chemistry.Given that travel remained difficult in 2022 for many researchers who dealt with COVID travel disruptions, we continued to sponsor webinars with our sister ACS Au journals to bring interactive research exchanges to researchers around the world.These included webinars in Innovations in Bioengineering (April) with ACS Materials Au, Grand Challenges in Measurement Science (June) with ACS Measurement Science Au and Grand Challenges in Engineering (October) with ACS Engineering Au.You can find recordings of all the webinars in the series (as well as others from ACS Pubs) on the ACS Web site. 5 The journal continues to be guided by an international team of editors, our Editorial Advisory Board, which met virtually in April, and our Early Career Advisor Board (ECAB).Our second ECAB was appointed in the summer and met virtually in July.Our ECAB is engaged in a new initiative, launched this year, called ECAB Selects, 6 whereby members of the board
A s we reach the halfway point of calendar year 2024, with the announcement of our first full journal impact factor (JIF) from Clarivate Analytics, we reflect on the growth and evolution of the journal.Launched in 2020 and publishing our first issues in 2021, the journal has steadily grown in submissions and published output each year.This growth, including >50% growth in submissions in 2024 compared to 2023, signals the value that the global chemical community sees in JACS Au.Our first two-year JIF of 8.5, growing from our initial, single year JIF of 8.0 in a year where nearly all established journals had JIF reductions, signals our strength and promise for further growth.Our publications are roughly equally distributed among the three largest publishing regions of East Asia & the Pacific, Europe, and the Western Hemisphere, with Chinese and US researchers publishing the most papers in about equal fractions.The fact that authors in East Asia & the Pacific have published the largest fraction of papers in JACS Au, yet it is the region with the fewest open access mandates, speaks to the value our journal brings to the global community.What is that value?To start, a storied brand, with JACS being among the oldest, most respected names in all of chemistry.This brand reflects the broader ACS Publications portfolio's reputation as the most trusted, most cited, and most read collection of chemistry journals in the world.ACS Publications offers rigorous peer review, rapid processing, and outstanding article production services.For example, JACS Au routinely completes peer review in 7-8 weeks (time of submission to time of acceptance) when gold open access journals from other publishers average 10, 20, or even 30 weeks.Our pool of outstanding reviewers managed by our diverse array of editors, who are all active researchers themselves, engenders great trust from our authors and readers, ensuring our published papers are among the best in chemistry.To expand the scope of the journal, we are adding a new paper type, becoming available for submission in August of this year.We are pleased to introduce Methods/Protocols to JACS Au.Methods/Protocols are manuscripts that provide a platform for researchers to report innovative experimental and computational methods and best laboratory practices relevant to their disciplines that would also be of interest to the broader scientific community.The goal of this manuscript type is to encourage and promote reproducibility and facile duplication of research by those skilled in the art, and to promote high scientific standards in the reporting of scientific methods.A few specialty
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTJACS Au Announces the 2024 Early Career Advisory BoardChristopher W. Jones*Christopher W. Jones*[email protected]More by Christopher W. Joneshttps://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2024, 4, 6, 2067Publication Date (Web):June 24, 2024Publication History Received5 June 2024Accepted5 June 2024Published online24 June 2024Published inissue 24 June 2024https://pubs.acs.org/doi/10.1021/jacsau.4c00484https://doi.org/10.1021/jacsau.4c00484editorialACS PublicationsCopyright © 2024 American Chemical Society. This publication is licensed under CC-BY-NC-ND 4.0. License Summary*You are free to share (copy and redistribute) this article in any medium or format within the parameters below:Creative Commons (CC): This is a Creative Commons license.Attribution (BY): Credit must be given to the creator.Non-Commercial (NC): Only non-commercial uses of the work are permitted. No Derivatives (ND): Derivative works may be created for non-commercial purposes, but sharing is prohibited. View full license*DisclaimerThis summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials. This publication is Open Access under the license indicated. Learn MoreArticle Views-Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail PDF (1010 KB) Get e-AlertscloseSUBJECTS:Gold Get e-Alerts
ADVERTISEMENT RETURN TO ARTICLES ASAPEditorialNEXTJACS Au Earns First Partial Impact FactorChristopher W. Jones*Christopher W. Jones*Email: [email protected]More by Christopher W. Joneshttps://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2023, XXXX, XXX, XXX-XXXPublication Date (Web):July 17, 2023Publication History Received5 July 2023Accepted5 July 2023Published online17 July 2023https://doi.org/10.1021/jacsau.3c00355© 2023 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceCC: Creative CommonsBY: Credit must be given to the creatorNC: Only noncommercial uses of the work are permittedND: No derivatives or adaptations of the work are permittedArticle Views-Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (730 KB) Get e-AlertscloseSUBJECTS:Chemical calculations,Chemical engineering and industrial chemistry,Gold,Redox reactions Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVEditorialNEXTIntroducing JACS Au ECAB SelectsChristopher W. Jones*Christopher W. Jones*Email: [email protected]More by Christopher W. Joneshttps://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2022, 2, 11, 2635Publication Date (Web):November 28, 2022Publication History Received9 November 2022Accepted9 November 2022Published online28 November 2022Published inissue 28 November 2022https://doi.org/10.1021/jacsau.2c00610Copyright © 2022 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceCC: Creative CommonsBY: Credit must be given to the creatorNC: Only noncommercial uses of the work are permittedND: No derivatives or adaptations of the work are permittedArticle Views191Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (953 KB) Get e-AlertsSUBJECTS:Gold Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTIntroducing the 2022 JACS Au Early Career Advisory BoardChristopher W. Jones*Christopher W. Jones*Email: [email protected]More by Christopher W. Joneshttps://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2022, 2, 6, 1233Publication Date (Web):June 27, 2022Publication History Received24 May 2022Accepted24 May 2022Published online27 June 2022Published inissue 27 June 2022https://doi.org/10.1021/jacsau.2c00319Copyright © 2022 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY-NC-ND 4.0. License Summary*You are free to share (copy and redistribute) this article in any medium or format within the parameters below:Creative Commons (CC): This is a Creative Commons license.Attribution (BY): Credit must be given to the creator.Non-Commercial (NC): Only non-commercial uses of the work are permitted. No Derivatives (ND): Derivative works may be created for non-commercial purposes, but sharing is prohibited. View full license*DisclaimerThis summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials. This publication is Open Access under the license indicated. Learn MoreArticle Views2201Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (581 KB) Get e-AlertscloseSUBJECTS:Chemistry education,Energy conversion,Gold,Safety Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTInternational Open Access Week and JACS AuChristopher W. Jones*Christopher W. JonesGeorgia Institute of Technology, Atlanta, Georgia 30332, United States*Email: [email protected]More by Christopher W. Joneshttps://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2021, 1, 10, 1515Publication Date (Web):October 25, 2021Publication History Published online25 October 2021Published inissue 25 October 2021https://pubs.acs.org/doi/10.1021/jacsau.1c00424https://doi.org/10.1021/jacsau.1c00424editorialACS PublicationsCopyright © 2021 American Chemical Society. This publication is licensed under CC-BY-NC-ND 4.0. License Summary*You are free to share (copy and redistribute) this article in any medium or format within the parameters below:Creative Commons (CC): This is a Creative Commons license.Attribution (BY): Credit must be given to the creator.Non-Commercial (NC): Only non-commercial uses of the work are permitted. No Derivatives (ND): Derivative works may be created for non-commercial purposes, but sharing is prohibited. View full license*DisclaimerThis summary highlights only some of the key features and terms of the actual license. It is not a license and has no legal value. Carefully review the actual license before using these materials. This publication is Open Access under the license indicated. Learn MoreArticle Views1157Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail PDF (577 KB) Get e-AlertscloseSUBJECTS:Cell signaling,Elements,Gold,Testing and assessment Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTIntroducing the JACS Au Associate Editors: Sabine Flitsch and Nuno MaulideChristopher W. Jones*Christopher W. JonesGeorgia Institute of Technology, Atlanta, Georgia 30332, United States*Email: [email protected]More by Christopher W. Joneshttp://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2021, 1, 4, 369–370Publication Date (Web):April 26, 2021Publication History Published online26 April 2021Published inissue 26 April 2021https://doi.org/10.1021/jacsau.1c00136Copyright © Published 2021 by American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceCC: Creative CommonsBY: Credit must be given to the creatorNC: Only noncommercial uses of the work are permittedND: No derivatives or adaptations of the work are permittedArticle Views565Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) Get e-AlertsSUBJECTS:Elements,Organic chemistry,Organic synthesis,Gold,Chemical biology Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTIntroducing the JACS Au Associate Editors: Rodney Priestley and Xin XuChristopher W. Jones*Christopher W. JonesGeorgia Institute of Technology, Atlanta, Georgia 30332, United States*Email: [email protected]More by Christopher W. Joneshttp://orcid.org/0000-0003-3255-5791Cite this: JACS Au 2021, 1, 5, 525–526Publication Date (Web):May 24, 2021Publication History Published online24 May 2021Published inissue 24 May 2021https://doi.org/10.1021/jacsau.1c00185Copyright © 2021 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceCC: Creative CommonsBY: Credit must be given to the creatorNC: Only noncommercial uses of the work are permittedND: No derivatives or adaptations of the work are permittedArticle Views657Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) Get e-AlertsSUBJECTS:Bioengineering and biotechnology,Biomaterials,Chemical engineering and industrial chemistry,Elements,Polymers Get e-Alerts
For the past two years, JACS Au has benefited from the guidance of two advisory bodies, our Editorial Advisory Board (EAB), composed of mostly senior scientists and engineers, and our Early
Ariel Furst of the Massachusetts Institute of Technology, the team reported that a delicate nitrogen-fixing bacterium, Pseudomonas chlororaphis, could be used as an in situ, nitrogen-fixing fertilizer replacement with outstanding performance after it was stabilized by using a selfassembled metal-phenolic network (
Abstract Owing to the significant attention directed toward alloy metal nanoclusters, it is crucial to explore the relationship between their structures and their performance during the electrocatalytic CO 2 reduction reaction (eCO 2 RR) and discover potential synergistic effects for the design of novel functional nanoclusters. However, a lack of suitable analogs makes this investigation challenging. In this study, we synthesized a well‐defined pair of structural analogs, [Au 8 Cu 1 (SAdm) 4 (Dppm) 3 Cl] 2+ and [Au 8 Ag 1 (SAdm) 4 (Dppm) 3 Cl] 2+ ( Au 8 Cu 1 and Au 8 Ag 1 , respectively), and characterized them. Single‐crystal X‐ray diffraction analysis revealed that Au 8 M 1 (M=Cu/Ag) consists of a tetrahedral Au 3 M 1 core capped by three (Dppm)Au staples, one Au 2 (SR) 3 staple, one lone SR ligand, and a terminal Cl ligand. Ag and Cu were doped at the same site in the Au 8 M 1 nanoclusters, which has rarely been reported. Au 8 Cu 1 exhibited a significantly higher CO Faradaic efficiency (FE CO ; ~82.2 %) during eCO 2 RR than that of Au 8 Ag 1 (FE CO ; ~33.1 %). Density functional theory calculations demonstrated that *COOH is the key intermediate in the reduction of CO 2 to CO. The formation of *COOH on Au 8 Cu 1 is more thermodynamically stable than on Au 8 Ag 1 , and Au 8 Cu 1 shows a smaller *CO formation energy than that on Au 8 Ag 1 , which promotes the reduction of CO 2 . We believe that the structural analogs Au 8 Cu 1 and Au 8 Ag 1 offer a suitable template for the in‐depth investigation of structure‐property correlations at the atomic level.
Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of microscopic investigations performed via high-resolution transmission electron microscopy (HR-TEM), scanning transmission electron microscopy (STEM), and energy dispersive X-ray analysis (EDS). To the best of our knowledge, this is the first report analyzing the BSA-AuNCs by CW-EPR/LEPR technique. Besides the presence of Au(0) and Au(I) oxidation states in BSA-AuNCs, the authors observe a significant amount of Au(II), which may result from a disproportionation event occurring within NCs: 2Au(I) → Au(II) + Au(0). Based on the LEPR experiments, and by comparing the behavior of BSA versus BSA-AuNCs under UV light irradiation (at 325 nm) during light off-on-off cycles, any energy and/or charge transfer event occurring between BSA and AuNCs during photoexcitation can be excluded. According to CW-EPR results, the Au nano assemblies within BSA-AuNCs are estimated to contain 6-8 Au units per fluorescent cluster. Direct observation of BSA-AuNCs by STEM and HR-TEM techniques confirms the presence of such diameters of gold nanoclusters in BSA-AuNCs. Moreover, in situ formation and migration of Au nanostructures are observed and evidenced after application of either a focused electron beam from HR-TEM, or an X-ray from EDS experiments.
Gold and silver nanoclusters (NCs) composed of <200 atoms are novel catalysts because their catalytic properties differ significantly from those of the corresponding bulk surface and can be dramatically tuned by the size (number of atoms). Doping with other metals is a promising approach for improving the catalytic performance of Au and Ag NCs. However, elucidation of the origin of the doping effects and optimization of the catalytic performance are hampered by the technical challenge of controlling the number and location of the dopants. In this regard, atomically precise Au or Ag (Au/Ag) NCs protected by ligands or polymers have recently emerged as an ideal platform because they allow regioselective substitution of single Au/Ag constituent atoms while retaining the size and morphology of the NC. Heterogeneous Au/Ag NC catalysts doped with a single atom can also be prepared by controlled calcination of ligand-protected NCs on solid supports. Comparison of thermal catalysis, electrocatalysis, and photocatalysis between the single-atom-doped and undoped Au/Ag NCs has revealed that the single-atom doping effect can be attributed to an electronic or geometric origin, depending on the dopant element and position. This minireview summarizes the recent progress of the synthesis and catalytic application of single-atom-doped, atomically precise Au/Ag NC catalysts and provides future prospects for the rational development of active and selective metal NC catalysts.
One of the important factors that determine the photoluminescence (PL) properties of gold nanoclusters pertain to the surface. In this study, four Au52(SR)32 nanoclusters that feature a series of aromatic thiolate ligands (–SR) with different bulkiness at the para-position are synthesized and investigated. The near-infrared (NIR) photoluminescence (peaks at 900–940 nm) quantum yield (QY) is largely enhanced with a decrease in the ligand’s para-bulkiness. Specifically, the Au52(SR)32 capped with the least bulky p-methylbenzenethiolate (p-MBT) exhibits the highest PLQY (18.3% at room temperature in non-degassed dichloromethane), while Au52 with the bulkiest tert-butylbenzenethiolate (TBBT) only gives 3.8%. The large enhancement of QY with fewer methyl groups on the ligands implies a nonradiative decay via the multiphonon process mediated by C–H bonds. Furthermore, single-crystal X-ray diffraction (SCXRD) comparison of Au52(p-MBT)32 and Au52(TBBT)32 reveals that fewer methyl groups at the para-position lead to a stronger interligand π···π stacking on the Au52 core, thus restricting ligand vibrations and rotations. The emission nature is identified to be phosphorescence and thermally activated delayed fluorescence (TADF) based on the PL lifetime, 3O2 quenching, and temperature-dependent PL and absorption studies. The 1O2 generation efficiencies for the four Au52(SR)32 NCs follow the same trend as the observed PL performance. Overall, the highly NIR-luminescent Au52(p-MBT)32 nanocluster and the revealed mechanisms are expected to find future applications.
In this minireview we survey the challenges and strategies in gold redox catalysis. Gold's reluctance to oxidative addition reactions due to its high redox potential limits its applicability. Initial attempts to overcome this problem focused on the use of sacrificial external oxidants in stoichiometric amounts to bring Au(I) compounds to Au(III) reactive species. Recently, innovative approaches focused on employing hemilabile ligands, which are capable of coordinating to Au(I) and stabilizing square-planar Au(III) intermediates, thus facilitating oxidative addition steps and enabling oxidant-free catalysis. Notable examples include the use of the (P^N) bidendate MeDalphos ligand to achieve various cross-coupling reactions via oxidative addition Au(I)/Au(III). Importantly, hemilabile ligand-enabled catalysis allows merging oxidative addition with π-activation, such as oxy- and aminoarylation of alkenols and alkenamines using organohalides, expanding gold's versatility in C-C and C-heteroatom bond formations and unprecedented cyclizations. Moreover, recent advancements in enantioselective catalysis using chiral hemilabile (P^N) ligands are also surveyed. Strikingly, versatile bidentate (C^N) hemilabile ligands as competitors of MeDalphos have appeared recently, by designing scaffolds where phosphine groups are substituted by N-heterocyclic or mesoionic carbenes. Overall, these approaches highlight the evolving landscape of gold redox catalysis and its tremendous potential in a broad scope of transformations.
Incorporation of plasmonic metal nanomaterials can significantly enhance the visible light response of semiconductor photocatalysts via localized surface plasmon resonance (LSPR) mechanisms. However, the surfaces of plasmonic metal nanomaterials are often covered with surfactant molecules, which is undesired when the nanomaterials are used for photocatalytic hydrogen evolution, since surfactant molecules could significantly compromise the nanomaterials’ cocatalyst functionalities by blocking the active sites and/or by inhibiting the surface charge transfer process. Herein, we demonstrate a method that assembles Au nanoparticles (NPs) into Au colloidosomes (AuCSs) without modifying their surfaces with surfactants. The resulting AuCSs were then coupled with CdS for the formation of Au–CdS composite photocatalysts through an in situ deposition method. The assembly of Au NPs induced a broader and stronger LSPR response for AuCSs, while the absence of surfactants allowed them to act efficiently as cocatalysts. This essentially enhanced the electron–hole pair generation rate and further their utilization efficiency, leading to an extremely high hydrogen evolution rate of 235.8 mmol·g –1 ·h –1 under simulated sunlight excitation.
Abstract Reactive oxygen species (ROS) plays important roles in living organisms. While ROS is a double-edged sword, which can eliminate drug-resistant bacteria, but excessive levels can cause oxidative damage to cells. A core–shell nanozyme, CeO 2 @ZIF-8/Au, has been crafted, spontaneously activating both ROS generating and scavenging functions, achieving the multi-faceted functions of eliminating bacteria, reducing inflammation, and promoting wound healing. The Au Nanoparticles (NPs) on the shell exhibit high-efficiency peroxidase-like activity, producing ROS to kill bacteria. Meanwhile, the encapsulation of CeO 2 core within ZIF-8 provides a seal for temporarily limiting the superoxide dismutase and catalase-like activities of CeO 2 nanoparticles. Subsequently, as the ZIF-8 structure decomposes in the acidic microenvironment, the CeO 2 core is gradually released, exerting its ROS scavenging activity to eliminate excess ROS produced by the Au NPs. These two functions automatically and continuously regulate the balance of ROS levels, ultimately achieving the function of killing bacteria, reducing inflammation, and promoting wound healing. Such innovative ROS spontaneous regulators hold immense potential for revolutionizing the field of antibacterial agents and therapies.
Abstract Rationally designing broad-spectrum photocatalysts to harvest whole visible-light region photons and enhance solar energy conversion is a “holy grail” for researchers, but is still a challenging issue. Herein, based on the common polymeric carbon nitride (PCN), a hybrid co-catalysts system comprising plasmonic Au nanoparticles (NPs) and atomically dispersed Pt single atoms (PtSAs) with different functions was constructed to address this challenge. For the dual co-catalysts decorated PCN (PtSAs–Au 2.5 /PCN), the PCN is photoexcited to generate electrons under UV and short-wavelength visible light, and the synergetic Au NPs and PtSAs not only accelerate charge separation and transfer though Schottky junctions and metal-support bond but also act as the co-catalysts for H 2 evolution. Furthermore, the Au NPs absorb long-wavelength visible light owing to its localized surface plasmon resonance, and the adjacent PtSAs trap the plasmonic hot-electrons for H 2 evolution via direct electron transfer effect. Consequently, the PtSAs–Au 2.5 /PCN exhibits excellent broad-spectrum photocatalytic H 2 evolution activity with the H 2 evolution rate of 8.8 mmol g −1 h −1 at 420 nm and 264 μmol g −1 h −1 at 550 nm, much higher than that of Au 2.5 /PCN and PtSAs–PCN, respectively. This work provides a new strategy to design broad-spectrum photocatalysts for energy conversion reaction.
In recent years, Au-based nanomaterials are widely used in nanomedicine and biosensors due to their excellent physical and chemical properties. However, these applications require Au NPs to have excellent stability in different environments, such as extreme pH, high temperature, high concentration ions, and various biomatrix. To meet the requirement of multiple applications, many synthetic substances and natural products are used to prepare highly stable Au NPs. Because of this, we aim at offering an update comprehensive summary of preparation high stability Au NPs. In addition, we discuss its application in nanomedicine. The contents of this review are based on a balanced combination of our studies and selected research studies done by worldwide academic groups. First, we address some critical methods for preparing highly stable Au NPs using polymers, including heterocyclic substances, polyethylene glycols, amines, and thiol, then pay attention to natural product progress Au NPs. Then, we sum up the stability of various Au NPs in different stored times, ions solution, pH, temperature, and biomatrix. Finally, the application of Au NPs in nanomedicine, such as drug delivery, bioimaging, photothermal therapy (PTT), clinical diagnosis, nanozyme, and radiotherapy (RT), was addressed concentratedly.