Chemistry - An Asian Journal最新文献_第10页

Temperature-Dependent Structures of Single-Atom Catalysts 单原子催化剂的温度相关结构

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-11 DOI: 10.1002/asia.202300679

Yuhui Chen, Dr. Rui Zhang, Prof. Hsiao-Tsu Wang, Dr. Ying-Rui Lu, Dr. Yu-Cheng Huang, Dr. Yu-Chun Chuang, Prof. Hua Wang, Prof. Jun Luo, Prof. Lili Han

{"title":"Temperature-Dependent Structures of Single-Atom Catalysts","authors":"Yuhui Chen, Dr. Rui Zhang, Prof. Hsiao-Tsu Wang, Dr. Ying-Rui Lu, Dr. Yu-Cheng Huang, Dr. Yu-Chun Chuang, Prof. Hua Wang, Prof. Jun Luo, Prof. Lili Han","doi":"10.1002/asia.202300679","DOIUrl":"10.1002/asia.202300679","url":null,"abstract":"Single-atom catalysts (SACs) have the unique coordination environment and electronic structure due to the quantum size effect, which plays an essential role in facilitating catalytic reactions. However, due to the limited understanding of the formation mechanism of single atoms, achieving the modulation of the local atomic structure of SACs is still difficult and challenging. Herein, we have prepared a series of Ni SACs loaded on nitrogen-doped carbon substrates with different parameters using a dissolution-and-carbonization method to systematically investigate the effect of temperature on the structure of the SACs. The results of characterization and electrochemical measurements are analyzed to reveal the uniform law between temperature and the metal loading, bond length, coordination number, valence state and CO2 reduction performance, showing the feasibility of controlling the structure of SACs through temperature to regulate the catalytic performance. This is important for the understanding of catalytic reaction mechanisms and the design of efficient catalysts.","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"18 20","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10554829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Targeting Ultrafast Spectroscopic Insights into Red Fluorescent Proteins 针对红色荧光蛋白的超快光谱观察。

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-08 DOI: 10.1002/asia.202300668

Dr. Taylor D. Krueger, Dr. Cheng Chen, Prof. Dr. Chong Fang

{"title":"Targeting Ultrafast Spectroscopic Insights into Red Fluorescent Proteins","authors":"Dr. Taylor D. Krueger, Dr. Cheng Chen, Prof. Dr. Chong Fang","doi":"10.1002/asia.202300668","DOIUrl":"10.1002/asia.202300668","url":null,"abstract":"Red fluorescent proteins (RFPs) represent an increasingly popular class of genetically encodable bioprobes and biomarkers that can advance next-generation breakthroughs across the imaging and life sciences. Since the rational design of RFPs with improved functions or enhanced versatility requires a mechanistic understanding of their working mechanisms, while fluorescence is intrinsically an ultrafast event, a suitable toolset involving steady-state and time-resolved spectroscopic techniques has become powerful in delineating key structural features and dynamic steps which govern irreversible photoconverting or reversible photoswitching RFPs, and large Stokes shift (LSS)RFPs. The pertinent cis-trans isomerization and protonation state change of RFP chromophores in their local environments, involving key residues in protein matrices, lead to rich and complicated spectral features across multiple timescales. In particular, ultrafast excited-state proton transfer in various LSSRFPs showcases the resolving power of wavelength-tunable femtosecond stimulated Raman spectroscopy (FSRS) in mapping a photocycle with crucial knowledge about the red-emitting species. Moreover, recent progress in noncanonical RFPs with a site-specifically modified chromophore provides an appealing route for efficient engineering of redder and brighter RFPs, highly desirable for bioimaging. Such an effective feedback loop involving physical chemists, protein engineers, and biomedical microscopists will enable future successes to expand fundamental knowledge and improve human health.","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"18 20","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10189873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Counter-Anions Rendered Weak-Interactions Perturb the Stability of Tyrosinase-Mimicked Peroxo-Dicopper(II) Active Site: Unraveling Computational Indicators 反阴离子呈现的弱相互作用扰动酪氨酸酶模拟过氧化二铜的稳定性（II）活性位点：解开的计算指标

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-07 DOI: 10.1002/asia.202300688

Sumangla Arora, Dr. Puneet Gupta

{"title":"Counter-Anions Rendered Weak-Interactions Perturb the Stability of Tyrosinase-Mimicked Peroxo-Dicopper(II) Active Site: Unraveling Computational Indicators","authors":"Sumangla Arora, Dr. Puneet Gupta","doi":"10.1002/asia.202300688","DOIUrl":"10.1002/asia.202300688","url":null,"abstract":"It has been observed in literature that the stability of tyrosinase-mimicked μ-η2:η2-peroxo-dicopper(II) (P) can be perturbed in presence of counter-anions (CAs) such as PhCO2−, CF3SO3−, TsO− and SbF6−. In this work, we unravel computational indicators using density functional theory to screen and study the stability of P in experimentally-reported cases. These indicators are Gibbs energies, geometrical parameters such as distances and angles, independent gradient model based on Hirshfeld partition (IGMH) generated data, orbitals’ overlap, and distortion-interaction (DI) energies. Our DFT computed Gibbs energies indicate that P is stable in case of PhCO2− and TsO−. CF3SO3− allows P and its isoelectronic species bis-μ-oxo-dicopper (O) to coexist. SbF6− shows that O is in excess. Our indicators reveal that the stability of P in case of PhCO2− and TsO− is due to the better placing of P and its CA, thus leading to better interactions and overlap of orbitals. Other indicator displays that the plane of Cu2O2 core in P is more bend in PhCO2− and TsO− cases as compared to the plane in the other two cases. In addition, the IGMH-based indicator displays higher values in the case of PhCO2− and TsO− than the other CAs.","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"18 20","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10336384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis towards Phainanoid F: Photo-induced 6π-Electrocyclization for Constructing Contiguous All-Carbon Quaternary Centers 类Phainanoid F的合成：光诱导6π-电循环构建连续的全碳四元中心

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-07 DOI: 10.1002/asia.202300622

Dr. Hao-Yuan Liu, Dr. Zhen-Yu Zhang, Dr. Yi-Ke Zhou, Prof. Dr. Jia-Hua Chen, Prof. Dr. Zhen Yang, Dr. Yuan-He Li

引用次数: 0

Easy Access to Tertiary Amines from Carbonyl Compounds with Substituted Amine-Boranes: A Substrate, Catalyst, and Additive-Free Approach Under Mild Conditions 从含取代胺硼烷的羰基化合物中容易获得叔胺：温和条件下的底物、催化剂和无添加剂方法。

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-06 DOI: 10.1002/asia.202300661

Deep Chowdhury, Dr. Arup Mukherjee

引用次数: 0

Direct Synthesis of Aldoximes: Ruthenium-Catalyzed Coupling of Alcohols and Hydroxylamine Hydrochloride 醛肟的直接合成：钌催化醇与盐酸羟胺的偶联

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-06 DOI: 10.1002/asia.202300678

Deepsagar Manikpuri, Raman Vijaya Sankar, Prof. Dr. Chidambaram Gunanathan

引用次数: 0

Improvements in the Electrochemical Performance of Sodium Manganese Oxides by Ti Doping for Aqueous Mg-Ion Batteries Ti掺杂对水性镁离子电池用钠锰氧化物电化学性能的改善

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-05 DOI: 10.1002/asia.202300542

Yongquan Zhang, Tao Ding, Jingshun Wang, Anquan Yao, Changhai Zhang, Tiandong Zhang, Yue Zhang, Yu Feng, Qingguo Chi

{"title":"Improvements in the Electrochemical Performance of Sodium Manganese Oxides by Ti Doping for Aqueous Mg-Ion Batteries","authors":"Yongquan Zhang, Tao Ding, Jingshun Wang, Anquan Yao, Changhai Zhang, Tiandong Zhang, Yue Zhang, Yu Feng, Qingguo Chi","doi":"10.1002/asia.202300542","DOIUrl":"10.1002/asia.202300542","url":null,"abstract":"In recent times, the research on cathode materials for aqueous rechargeable magnesium ion battery has gained significant attention. The focus is on enhancing high-rate performance and cycle stability, which has become the primary research goal. Manganese oxide and its derived Na−Mn−O system have been considered as one of the most promising electrode materials due to its low cost, non-toxicity and stable spatial structure. This work uses hydrothermal method to prepare titanium gradient doped nano sodium manganese oxides, and uses freeze-drying technology to prepare magnesium ion battery cathode materials with high tap density. At the initial current density of 50 mA g−1, the NMTO-5 material exhibits a high reversible capacity of 231.0 mAh g−1, even at a current density of 1000 mA g−1, there is still 122.1 mAh g−1. It is worth noting that after 180 cycles of charging and discharging at a gradually increasing current density such as 50–1000 mA g−1, it can still return to the original level after returning to 50 mA g−1. Excellent electrochemical performance and capacity stability show that NMTO-5 material is a promising electrode material.","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"18 20","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10569127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rh(II)-Catalyzed Denitrogenative Reaction of N-Sulfonyl-1,2,3-triazoles with Quinolones and Isoquinolones Rh（II）催化N-磺酰基-1,2,3-三唑与喹诺酮类和异喹诺酮类的脱氮反应。

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-04 DOI: 10.1002/asia.202300614

Shivam Pandey, Sabiha Parveen, Prof. Chandra M. R. Volla

引用次数: 0

Temperature-Responsive Pickering Double Emulsions Stabilized by Binary Microgels 二元微凝胶稳定的温度响应Pickering双乳液

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-02 DOI: 10.1002/asia.202300587

Dr. Xin Guan, Prof. Yunxing Li, Dr. Hang Jiang, Prof. Ying-Lung Steve Tse, Prof. To Ngai

引用次数: 0

Exploring the Divergent Reactivity of Vinyl Radicals Emanating from Alkynes and Thiols via Photoredox Catalysis 光氧化还原催化从炔烃和硫醇中释放乙烯基自由基的分散反应性研究

IF 4.1 3区化学

Chemistry - An Asian Journal Pub Date : 2023-09-01 DOI: 10.1002/asia.202300693

Sourav Kumar, Dr. Bhahwal Ali Shah

引用次数: 1