Chemistry - An Asian Journal最新文献_第3页

Surface Structure, Thermal Behavior, and Electrochemical Stability of Oligo(ethylene glycol)-Terminated Alkanethiolate Self-Assembled Monolayers on Au(111) 金表面低聚（乙二醇）端链烷硫酸盐自组装单层膜的表面结构、热行为和电化学稳定性（111）。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-29 DOI: 10.1002/asia.71027

Hyun Sun Sung, Young Ji Son, Jin Wook Han, Hong Kyu Park, Seo Yeon Park, Keiko Hakata, Motoharu Kimura, Tomohiro Hayashi, Jaegeun Noh

{"title":"Surface Structure, Thermal Behavior, and Electrochemical Stability of Oligo(ethylene glycol)-Terminated Alkanethiolate Self-Assembled Monolayers on Au(111)","authors":"Hyun Sun Sung, Young Ji Son, Jin Wook Han, Hong Kyu Park, Seo Yeon Park, Keiko Hakata, Motoharu Kimura, Tomohiro Hayashi, Jaegeun Noh","doi":"10.1002/asia.71027","DOIUrl":"10.1002/asia.71027","url":null,"abstract":"<div>\u0000 \u0000 To investigate the effects of oligo(ethylene glycol) (OEG) chain length and thermal factors on the formation of self-assembled monolayers (SAMs), the surface structure, adsorption state, and electrochemical stability of SAMs of 2-[2-(2-methoxyethoxy)ethoxy]ethanethiol (EG3 SAMs) on Au(111) at an elevated temperature were examined using scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). To gain a clearer understanding, the results for EG3 SAMs were directly compared with those observed for decanethiolate (DT) SAMs. STM observations revealed that DT SAMs formed after deposition at 323 K for 2 and 24 h exhibited a well-ordered c(4 × 2) phase regardless of the deposition time, whereas EG3 SAMs at 323 K for 2 h displayed a mixed morphology of ordered and disordered phases containing brightly aggregated rows. After deposition at 323 K for 24 h, the brightly aggregated rows almost disappeared and more uniformly ordered SAMs were formed on the entire Au (111) surface. Moreover, CV measurements showed that EG3 SAMs are reductively desorbed from the Au surface much more easily than DT SAMs. In this study, we clearly demonstrated that the OEG backbone significantly affects the formation, surface structure, thermal behavior, and electrochemical stability of SAMs.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 21","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149293536","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

Direct Reduction-Driven Active Species Formation in RuMn-Containing Zeolite Catalyst for 5-Hydroxymethylfurfural Oxidation 5-羟甲基糠醛氧化催化剂中直接还原驱动活性物质的形成

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-25 DOI: 10.1002/asia.71021

Rahul Gautam, Rupinder Kaur, Nidhi Gossai, Kanika Saini, Cheralathan Kanakkampalayam Krishnan, Shunmugavel Saravanamurugan

{"title":"Direct Reduction-Driven Active Species Formation in RuMn-Containing Zeolite Catalyst for 5-Hydroxymethylfurfural Oxidation","authors":"Rahul Gautam, Rupinder Kaur, Nidhi Gossai, Kanika Saini, Cheralathan Kanakkampalayam Krishnan, Shunmugavel Saravanamurugan","doi":"10.1002/asia.71021","DOIUrl":"https://doi.org/10.1002/asia.71021","url":null,"abstract":"<div>\u0000 \u0000 The selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is an important transformation for producing sustainable bio-based chemicals and polymer precursors. Here, the influence of pretreatment strategies on the physicochemical properties and catalytic performance of RuMn supported on modified H-ZSM-5 (RuMn/ZS) was investigated for HMF oxidation. Directly reduced RuMn/ZS (RuMn/ZS-R) was compared with calcined RuMn/ZS (RuMn/ZS-C) and calcined-reduced RuMn/ZS (RuMn/ZS-CR). RuMn/ZS-R exhibited the highest activity, affording 72.7% FDCA yield and 75.7% total furanics yield, compared with 5.0% and 14.1% FDCA for RuMn/ZS-C and RuMn/ZS-CR, respectively. XPS and TEM analyses revealed that direct reduction promotes highly dispersed metallic Ru0 species together with Mn3+/Mn4+ promoter species. NH3-TPD, CO2-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFTS) further demonstrated enhanced Lewis and Brønsted acidity and a higher concentration of moderate basic sites in RuMn/ZS-R. Poisoning experiments supported the contribution of both acidic and basic sites to HMF oxidation. The superior performance of RuMn/ZS-R is attributed to the synergistic interplay of highly dispersed Ru0, Mn promoter species, acidic sites, and moderate basic sites generated by direct reduction. These findings provide insight into designing multifunctional zeolite (ZS)-supported catalysts for selective biomass oxidation.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149259096","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

Stimuli-Responsive Molecular Crystals: Structure-Property Relationships and Applications 刺激响应分子晶体：结构-性质关系及其应用

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-25 DOI: 10.1002/asia.71016

Binoy K. Saha

{"title":"Stimuli-Responsive Molecular Crystals: Structure-Property Relationships and Applications","authors":"Binoy K. Saha","doi":"10.1002/asia.71016","DOIUrl":"https://doi.org/10.1002/asia.71016","url":null,"abstract":"<div>\u0000 \u0000 Single-crystal-based smart materials offer significant advantages over their polymeric, polycrystalline, and amorphous counterparts owing to their long-range structural order, rapid response, and efficient energy transfer. Recent advances in mechanically compliant molecular crystals have made the flexible single-crystal materials attractive candidates for next-generation flexible devices. These materials respond to external stimuli such as mechanical force, temperature, light, electric and magnetic fields, chemical vapors, and so on, producing measurable outputs that are valuable for different applications. In particular, organic molecular crystals are lightweight, metal-free, readily tunable through well-established synthetic methodologies, and readily amenable to crystal engineering, enabling the rational design of materials with tailored properties. This review provides a comprehensive overview of stimuli-responsive organic molecular crystals, emphasizing their structure–property relationships, response mechanisms, and emerging applications. Different classes of mechanically, thermally, photo-, electrically, magnetically, and chemically responsive crystals are critically discussed together with the structural features governing their behavior. Particular attention is devoted to the mechanisms underlying crystal deformation, phase transitions, energy conversion, and stimuli-induced functional responses, as well as their applications in actuators, flexible electronics, optical waveguides, sensors, and other smart devices. Finally, the current challenges, emerging opportunities, and future design strategies for developing multifunctional organic crystalline materials with enhanced performance are highlighted.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149259163","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

Bifunctional Iridium Pincer Catalysis for (De)Hydrogenation of N-Heterocycles 双功能铱钳催化n -杂环的（去）氢化。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-23 DOI: 10.1002/asia.71020

Selvakumar Selvarasu, Balaji R. Jagirdar

{"title":"Bifunctional Iridium Pincer Catalysis for (De)Hydrogenation of N-Heterocycles","authors":"Selvakumar Selvarasu, Balaji R. Jagirdar","doi":"10.1002/asia.71020","DOIUrl":"10.1002/asia.71020","url":null,"abstract":"<div>\u0000 \u0000 Base-free, reversible, acceptorless dehydrogenation of 1,2,3,4-tetrahydroisoquinoline (THIQ), 1,2,3,4-tetrahydroquinoline (THQ), and other N-heterocycles catalyzed by an Ir(III) pincer complex, [Ir(H)(Cl)(tBu4PNCNP)] (1), has been demonstrated. Quantitative yields were obtained in the cases of THIQ, THQ, and 1-Ph-THIQ. The catalyst (2.0 mol%) was found to be efficient for five cycles of the reversible process for THIQ. The dehydrogenation of THIQ and THQ proceeded with the rate constants of 1.54 × 10−1 and 0.79 ×10−1 h−1, respectively. The hydrogenation of isoquinoline (IQ) and quinoline (Q) gave rate constants of 1.31 × 10−1 and 0.53 × 10−1 h−1, respectively. IQ and Q coordinate to the metal center in complex 1 to form cis and trans isomers, [Ir(H)(Cl)(L)(tBu4PNCNP)] (L = IQ, cis- and trans-1-IQ; L = Q, cis- and trans-1-Q) at low temperatures. The reversible transformation was also investigated using trans-2,5-dimethylpiperazine. In the dehydrogenation of THIQ, no intermediate was observed experimentally prior to the complete dehydrogenation of THIQ to form IQ. Acyclic 2°-amines such as N-benzylaniline, dibenzylamine, N-methylbenzylamine, N-cyclohexylethylamine, diisobutylamine, and dibutylamine underwent transamination except N-isopropylaniline, in addition to the dehydrogenation reaction.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149236230","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

Strategic Evolution of Quantum Dot-Sensitized Solar Cells From Materials to Devices 量子点敏化太阳能电池从材料到器件的战略演变

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-22 DOI: 10.1002/asia.71014

Salma Khan, Nidhi Prajapati, Preeti Sehgal

{"title":"Strategic Evolution of Quantum Dot-Sensitized Solar Cells From Materials to Devices","authors":"Salma Khan, Nidhi Prajapati, Preeti Sehgal","doi":"10.1002/asia.71014","DOIUrl":"https://doi.org/10.1002/asia.71014","url":null,"abstract":"<div>\u0000 \u0000 Quantum dot-sensitized solar cells (QDSSCs) have emerged as a promising next-generation photovoltaic technology, utilizing semiconductor quantum dots (QDs) for efficient light energy conversion. Their high absorption coefficients, tunable bandgaps, and multiple exciton generation (MEG) properties offer significant advantages. According to the National Renewable Energy Laboratory (NREL) report, early QDSSCs achieved an efficiency of only 1.35%, while recent advancements have pushed to their power conversion efficiency (PCE) to nearly 18.1%, driven by innovations in photoanode engineering, interface optimization, and novel QDs materials. Strategies to maximize photoinduced charge separation and electron transfer, as well as minimize recombination losses through interface engineering, are analyzed. The challenges of maintaining long-term stability, reducing recombination, and addressing environmental concerns are also discussed, with attention to protective coatings, encapsulation techniques, and lead-free QDs alternatives. Significant progress has been achieved using quaternary Cu2ZnSnS4 (CZTS) QDs in QDSSCs. The use of 1-dodecanethiol (DDT) as a capping ligand, followed by a successive ionic layer adsorption and reaction (SILAR) process to create a core/shell structure, has enhanced charge transport and reduced recombination. The integration of QDSSCs with tandem solar cells and improvements in charge carrier extraction could unlock higher efficiencies, advancing the role of QDSSCs in delivering sustainable and cost-effective solutions.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258520","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 and Characterization of Bora(Amino)Silylene-Coordinated Cu(I) Metallacycle 硼（氨基）硅基配合铜(I)金属环的合成与表征

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-22 DOI: 10.1002/asia.71022

Asif Husain, Bhupendra Goswami, Akhil K. Singh, Ravi Yadav

引用次数: 0

Hierarchically Porous Mn3O4 Nanocrystals for Aerobic, Solvent-Free Dehydrogenative C─N Cross-Coupling Reactions 用于好氧无溶剂脱氢C─N交叉偶联反应的分层多孔Mn3O4纳米晶体。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-18 DOI: 10.1002/asia.71019

Kiruthiga M., Natasha Julia Martin, Debashis Ghosh, Bhabani Malakar, Swapan K. Das, Asim Bhaumik

{"title":"Hierarchically Porous Mn3O4 Nanocrystals for Aerobic, Solvent-Free Dehydrogenative C─N Cross-Coupling Reactions","authors":"Kiruthiga M., Natasha Julia Martin, Debashis Ghosh, Bhabani Malakar, Swapan K. Das, Asim Bhaumik","doi":"10.1002/asia.71019","DOIUrl":"10.1002/asia.71019","url":null,"abstract":"<div>\u0000 \u0000 Synthesis of a robust redox metal oxide based material with nanoscale porosity is very demanding in the context of heterogeneous catalysis. Hereby, we report a convenient synthetic approach for designing hierarchically porous Mn3O4 nanocrystals (HP-Mn3O4-NCs) using a small organic molecular entity, sodium salicylate, as a structure-directing agent. The porosity and the crystallinity were evaluated through the powder XRD, TEM, and N2 sorption. TEM analysis revealed the presence of mesopores, which agrees well with the N2 sorption analysis. XPS analysis revealed the presence of a mixed-valent Mn2+ and Mn3+. The aerial dehydrogenative C─N cross-coupling of aromatic diamines and alcohols for the selective production of benzimidazole derivatives proceeds smoothly in the presence of HP-Mn3O4-NCs as a heterogeneous catalyst. The catalyst displayed a clean reaction profile with excellent product yields of up to 94% for various substrates. Noticeably, the reaction is accomplished under base-free, solvent-free, and aerial conditions. The existence of mesopore enables a high internal surface area, thereby increasing the exposure of surface-active sites. The mesopores of the material promote the facile diffusion of reactants and products. Large specific surface area, abundant surface-active sites, stability, and structural robustness collectively endow the HP-Mn3O4-NCs with high catalytic activity and recycling efficiency.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149219777","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

Relative Influence of Pd(II) and Pt(II) Metal Centers on the Strength of Interactions Between Planar Species 钯（II）和铂（II）金属中心对平面种间相互作用强度的相对影响。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-18 DOI: 10.1002/asia.71018

Jess L. Algar, Rosemary J. Goodwin, Dan Preston

引用次数: 0

Visible Light-Mediated Sulfonylation of Enamides: Synthesis of (E)-β-Amidovinyl Sulfones 可见光介导的酰胺基磺化反应：(E)-β-酰胺基砜的合成

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-16 DOI: 10.1002/asia.71015

Souvik Karmakar, Dhiraj Dutta, Bedanta Sengupta, Parthasarathi Das

引用次数: 0

Oxidation-Phosphorization Synthesis of Nitrogen-Doped Biochar-Supported CoP for Ammonia Borane Hydrolysis 氨硼烷水解用氮掺杂生物炭负载CoP的氧化-磷酸化合成

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-10-16 DOI: 10.1002/asia.71017

Lukuan Zong, Anqi Zhang, Huanhuan Zhang, Huijuan Wei, Xianji Guo

{"title":"Oxidation-Phosphorization Synthesis of Nitrogen-Doped Biochar-Supported CoP for Ammonia Borane Hydrolysis","authors":"Lukuan Zong, Anqi Zhang, Huanhuan Zhang, Huijuan Wei, Xianji Guo","doi":"10.1002/asia.71017","DOIUrl":"https://doi.org/10.1002/asia.71017","url":null,"abstract":"<div>\u0000 \u0000 An oxidation-phosphorization route was adopted to prepare cobalt phosphide supported on nitrogen-doped biochar (denoted as CoP/NBC) for ammonia borane hydrolysis. NBC (i.e., nitrogen-doped biochar) was obtained by NH4Cl-assisted pyrolysis of paulownia wood and used to disperse Co species. After in situ reduction, controlled oxidation, and low-temperature phosphorization, CoP nanosheets were formed on the porous biochar support. The optimized CoP/NBC catalyst displayed a turnover frequency (TOF) of 47 molH2∙molCo−1∙min−1 at 303 K, and the catalyst had no significant loss of activity over five consecutive cycles. Structural characterization confirmed the formation of crystalline CoP and suggested interfacial electronic interactions between CoP and NBC. The porous N-doped biochar support favored the dispersion of CoP and facilitated mass transfer, while phosphorization modified the electronic state of Co. These combined structural features contributed to the catalytic performance of CoP/NBC and provide a simple strategy for developing low-cost non-noble-metal catalysts for hydrogen generation from ammonia borane.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 20","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205917","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