Chemistry - An Asian Journal最新文献_第9页

Mesostructural Engineering of Faceted Gold Nanoparticles in 3D KIT-6 Silica for Enhanced Catalytic Efficiency 3D KIT-6二氧化硅中多面金纳米颗粒的细观结构工程以提高催化效率。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-05 DOI: 10.1002/asia.70913

Sudipta Ghosh, Manajit Mandal, Shyamal Mondal, Bipattaran Paramanik, Arpan Dutta, Manasi Mukhopadhyay, Prasanta Kumar Sinha, Prakash Chandra Mondal

{"title":"Mesostructural Engineering of Faceted Gold Nanoparticles in 3D KIT-6 Silica for Enhanced Catalytic Efficiency","authors":"Sudipta Ghosh, Manajit Mandal, Shyamal Mondal, Bipattaran Paramanik, Arpan Dutta, Manasi Mukhopadhyay, Prasanta Kumar Sinha, Prakash Chandra Mondal","doi":"10.1002/asia.70913","DOIUrl":"10.1002/asia.70913","url":null,"abstract":"<div>\u0000 \u0000 Gold nanoparticles (Au NPs) supported on ordered mesoporous silica have attracted significant attention as robust nanocatalysts. In this study, high-gold-content three-dimensional (3D) mesoporous silica (KIT-6-Au NPs) was synthesized, which exhibited a 3D cubic Ia3d mesostructure with uniformly dispersed Au NPs (∼8 nm) predominantly exposing the (111) facets. Structural analyses were conducted by Brunauer–Emmett–Teller surface area measurement, Raman spectroscopy, solid-state Si29 NMR spectroscopy, Transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and inductively coupled plasma optical emission spectroscopy, confirming high gold loading 15.5 wt% and strong metal–support interaction. Catalytic performance was evaluated through the reduction of 4-nitrophenol (4-NP) with NaBH4 as a model reaction, exhibiting a maximum apparent rate constant of 0.0086 ± 0.0002 s−1 at 25°C. It surpasses comparable Au–mesoporous silica systems and is competitive with other silica-supported metallic nanocatalysts. The findings further confirm that the reduction of 4-NP by NaBH4 in the presence of the KIT-6-Au NP catalyst proceeds via a heterogeneous catalytic pathway and that the catalyst is structurally robust under the reaction conditions. This work highlights the potential of facet-engineered, high-loading Au NPs integrated within a 3D mesoporous silica framework as an efficient catalyst capable of promoting diverse reactions under mild conditions.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148672689","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 a New Zinc-Coordinated Covalent Organic Polymer: A Versatile Catalyst for the Synthesis of 2-Substituted Benzimidazoles and Quinoline Derivatives 一种新型锌配位共价有机聚合物的合成与表征：一种合成2-取代苯并咪唑及喹啉衍生物的多功能催化剂。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-05 DOI: 10.1002/asia.70924

Pritish Rajkumar Moon, Jyoti Prabha Kujur, Devendra Deo Pathak

{"title":"Synthesis and Characterization of a New Zinc-Coordinated Covalent Organic Polymer: A Versatile Catalyst for the Synthesis of 2-Substituted Benzimidazoles and Quinoline Derivatives","authors":"Pritish Rajkumar Moon, Jyoti Prabha Kujur, Devendra Deo Pathak","doi":"10.1002/asia.70924","DOIUrl":"10.1002/asia.70924","url":null,"abstract":"<div>\u0000 \u0000 A Zn(II)-coordinated covalent organic polymer (Zn-COP) was synthesized from TMPT-CHO and 2,6-DAAQ, wherein Zn(II) ions are accommodated within the cavities of the polymeric framework. The structural integrity and morphology of Zn-COP were systematically characterized by 13C CP/MAS solid-state NMR, FT-IR, XRD, XPS, SEM, TEM, EDX, elemental mapping, TGA, BET, CHN, and ICP–OES analyses, confirming the successful construction of the COP framework and incorporation of Zn(II) species. The catalytic performance of Zn-COP was evaluated in the one-pot synthesis of three classes of N-containing heterocycles, namely 2-substituted benzimidazoles, 2-aminoquinolines, and 2-phenylquinolines, from readily accessible substrates under solvent-free conditions. The optimized protocol afforded excellent product selectivity together with high conversions and product yields. Furthermore, the catalytic process exhibited favorable green chemistry parameters, including AE, E-factor, CE, PMI, and RME. The catalyst could be readily separated from the reaction mixture and reused for four consecutive cycles with negligible loss of activity, demonstrating the potential of Zn-COP as a robust and sustainable heterogeneous catalytic system.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148672771","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

ROPISA Synthetic Strategy for Photo-Crosslinked Aqueous Polypeptide Nano-Assemblies 光交联水性多肽纳米组件的ROPISA合成策略。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-05 DOI: 10.1002/asia.70912

Akshaya Maria Prasad, Parshuram Kambale, Rahul Nisal, Manickam Jayakannan

{"title":"ROPISA Synthetic Strategy for Photo-Crosslinked Aqueous Polypeptide Nano-Assemblies","authors":"Akshaya Maria Prasad, Parshuram Kambale, Rahul Nisal, Manickam Jayakannan","doi":"10.1002/asia.70912","DOIUrl":"10.1002/asia.70912","url":null,"abstract":"<div>\u0000 \u0000 Polypeptides are emerging as an integral part of biomaterial research because of their unique ability to mimic natural protein-like secondary structures in water; however, they require a multistep self-assembly process to yield desired nano-sized objects for intended biomedical applications. In this study, we report a one-pot photo-crosslink strategy for stable polypeptide nanoparticle self-assembly by ring-opening polymerization-induced self-assembly (ROPISA) route. For this purpose, a cinnamoyl functionalized l-serine based N-carboxyanhydride (NCA) monomer is designed and subjected to ROPISA using PEG-amine as a hydrophilic macroinitiator in water which produced stable opalescent dispersions of amphiphilic PEG-polypeptide di-block copolymers having narrow molecular weights. Dynamic light scattering and HR-TEM analysis revealed the formation of spherical nanoparticles of 25–30 nm in size. The cinnamoyl anchored polypeptides underwent [2+2] cycloaddition under UV irradiation (265 nm) and the occurrence of the photo-crosslinking and its kinetics is studied by UV–visible spectroscopy. Notably, the nanoparticle size and structural integrity is remained unchanged and the particle morphology is found to be very stable. The core-cross-linked nanoparticles is found to be stable and behave as efficient scaffold for loading both water soluble and insoluble cargoes. This report opens an avenue to access photo-crosslinkable polypeptide nano-assemblies in the literature.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148672748","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

Ru(II)-Catalyzed Cascade Regioselective C-7 and C-8 Diamidation of Isoquinolinones Using Dioxazolones Ru（II）催化的级联区域选择性C-7和C-8用二恶唑酮异喹啉酮二化反应。

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-05 DOI: 10.1002/asia.70926

Ravichandran Manikandan, Annamalai Pratheepkumar

引用次数: 0

Selective Detection of Fe(III) and Al(III) Using an Azo-Functionalized Rhodamine B Chemosensor: Expansion to F- Ion Detection by Al(III)-Probe Complex 偶氮功能化罗丹明B化学传感器对Fe（III）和Al（III）的选择性检测：扩展到Al（III）探针配合物对F离子的检测

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70929

Swikriti Daw, Manik Das, Shobhon Aich, Bidhan Chandra Samanta, Uttam Kumar Das, Dilip K. Maiti, Tithi Maity

{"title":"Selective Detection of Fe(III) and Al(III) Using an Azo-Functionalized Rhodamine B Chemosensor: Expansion to F- Ion Detection by Al(III)-Probe Complex","authors":"Swikriti Daw, Manik Das, Shobhon Aich, Bidhan Chandra Samanta, Uttam Kumar Das, Dilip K. Maiti, Tithi Maity","doi":"10.1002/asia.70929","DOIUrl":"https://doi.org/10.1002/asia.70929","url":null,"abstract":"<div>\u0000 \u0000 An azo-functionalized Rhodamine-B based chemosensor, HL [4-((E)-(3-((Z)-((3′,6′-bis(diethylamino)-3-oxospiro[isoindoline-1,9′-xanthen]-2-yl)imino)methyl)-5-ethoxy-4-hydroxyphenyl)diazenyl)benzoic acid], has been developed and spectroscopically characterized. Impressively, among competitive cations, the sensor can detect Al(III) and Fe(III) in a methanol–water (9:1, v/v) medium by changing its optical color and turning on fluorescence response. The low limit of detection (LOD) value (72 µM) and the sensor's reproducibility assure us about its practical applicability. The spirolactam ring opening in the presence of two target cations induces the luminescence character to the chemosensor, and the NMR spectrum validates this fact. The HL-Al(III) complex can selectively detect F− ion among several competing anions via turn-off fluorescence in a methanol-water medium. Coordination of F− to the metal ion frees the bare probe with its ring-closing form, leading to fluorescence quenching. Mass spectral data and Job's plot confirm the 1:1 probe-analyte stoichiometry. As a practical application, the sensor can quantify Al(III) in commercially available pharmaceutical samples, and the Sensor-Al(III) complex can detect F- in locally available water samples.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662270","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

A Sandwich CNTs–Si–CNTs Current Collector Enabling Uniform Lithium Plating for Anode-Free Lithium Metal Batteries 实现无阳极锂金属电池均匀镀锂的夹层碳纳米管-硅纳米管集流器

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70914

Xiao Yang, Binglong Ma, Mingyang Dai, Junli Guo, Caixia Chi, Jian Hao

{"title":"A Sandwich CNTs–Si–CNTs Current Collector Enabling Uniform Lithium Plating for Anode-Free Lithium Metal Batteries","authors":"Xiao Yang, Binglong Ma, Mingyang Dai, Junli Guo, Caixia Chi, Jian Hao","doi":"10.1002/asia.70914","DOIUrl":"https://doi.org/10.1002/asia.70914","url":null,"abstract":"<div>\u0000 \u0000 Anode-free lithium metal batteries (AFLBs) offer high energy density by plating Li directly on a current collector, but practical use is limited by dendrite growth and unstable SEI, which cause low Coulombic efficiency and rapid failure. Existing 3D hosts can still suffer top-surface–dominated deposition and poor pore utilization under polarization. Here, a sandwich CNT–Si–CNT current collector was prepared by gradient vacuum filtration. The embedded Si as lithiophilic sites could promote the internal deposition of Li in the carbon nanotubes (CNTs) network, while the 3D interconnected structure facilitates efficient electron transfer and ion diffusion. The Li plating/stripping behavior on CNT–Si–CNT was evaluated using a Li half-cell, symmetric-cell, and LFP full-cell test. The optimized 5Si–CNTs reduced Li nucleation overpotential to 21.3 mV and achieved an average CE of 90.53% over 100 cycles at 1 mA cm−2 (2 mAh cm−2). It also delivered stable symmetric-cell cycling (210 h at 0.25 mA cm−2) with low polarization and improved LFP full-cell discharge capacity retention. Overall, embedding lithiophilic sites within a lightweight carbon nanotube (CNT) scaffold provides a practical route to more uniform Li plating and enhanced reversibility for AFLBs.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662473","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

Synergistic Effects of Morphology and Interface Engineering in WO3/TiO2 for Photocatalytic Hydrogen Generation WO3/TiO2光催化制氢的形貌与界面工程协同效应

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70918

Suhaib Alam, Chetan Rathi, Dimple, Keisuke Tsushiro, Fumiaki Amano, Priyanka Verma

{"title":"Synergistic Effects of Morphology and Interface Engineering in WO3/TiO2 for Photocatalytic Hydrogen Generation","authors":"Suhaib Alam, Chetan Rathi,  Dimple, Keisuke Tsushiro, Fumiaki Amano, Priyanka Verma","doi":"10.1002/asia.70918","DOIUrl":"https://doi.org/10.1002/asia.70918","url":null,"abstract":"<div>\u0000 \u0000 Developing efficient catalysts for H2 release is significant in advancing sustainable energy systems. In particular, heterostructures based on WO3 and TiO2 stand out as promising photocatalysts owing to their tunable band structures, robust stability, and cost-effectiveness. This study investigates the impact of morphology and synthesis approach on the catalytic performance of WO3/TiO2 heterostructures for ammonia borane dehydrogenation. Two synthesis approaches, ex situ coupling of pre-synthesized WO3 with TiO2 and in situ growth of TiO2 on WO3, were systematically utilized to tailor the heterointerface and morphology. Controlled reaction conditions facilitated the formation of hexagonal-like WO3, thereby enabling the growth of distinct nanostructures. When integrated with TiO2, the morphology, heterojunction characteristics, and surface area were found to be highly dependent on the synthesis method. The in situ WO3/TiO2 heterostructure (∼0.302 µmol min−1) exhibited superior catalytic performance compared to ex situ method (∼0.258 µmol min−1). This enhancement is ascribed to the synergistic effects of increased surface area (21.81 m2g−1 for in situ sample compared with 11.33 m2g−1 for ex situ sample) and a more intimate heterointerface, which together promote effective charge separation and electron transfer. The findings highlight that not only morphology and composition but also the synthetic route play a critical role in determining catalytic efficiency.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662463","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

Continuous Recovery of Spent LiFePO4 via Ascorbic Acid Based Redox Flow Battery 基于抗坏血酸的氧化还原液流电池连续回收废LiFePO4

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70931

Jianan Zan, Yizhi Liao, Wei Shan, Fan Xu, Lu Guo, Kwun Nam Hui, Min Luo, Fuming Chen

引用次数: 0

A Sandwich CNTs–Si–CNTs Current Collector Enabling Uniform Lithium Plating for Anode-Free Lithium Metal Batteries 实现无阳极锂金属电池均匀镀锂的夹层碳纳米管-硅纳米管集流器

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70914

Xiao Yang, Binglong Ma, Mingyang Dai, Junli Guo, Caixia Chi, Jian Hao

{"title":"A Sandwich CNTs–Si–CNTs Current Collector Enabling Uniform Lithium Plating for Anode-Free Lithium Metal Batteries","authors":"Xiao Yang, Binglong Ma, Mingyang Dai, Junli Guo, Caixia Chi, Jian Hao","doi":"10.1002/asia.70914","DOIUrl":"https://doi.org/10.1002/asia.70914","url":null,"abstract":"<div>\u0000 \u0000 Anode-free lithium metal batteries (AFLBs) offer high energy density by plating Li directly on a current collector, but practical use is limited by dendrite growth and unstable SEI, which cause low Coulombic efficiency and rapid failure. Existing 3D hosts can still suffer top-surface–dominated deposition and poor pore utilization under polarization. Here, a sandwich CNT–Si–CNT current collector was prepared by gradient vacuum filtration. The embedded Si as lithiophilic sites could promote the internal deposition of Li in the carbon nanotubes (CNTs) network, while the 3D interconnected structure facilitates efficient electron transfer and ion diffusion. The Li plating/stripping behavior on CNT–Si–CNT was evaluated using a Li half-cell, symmetric-cell, and LFP full-cell test. The optimized 5Si–CNTs reduced Li nucleation overpotential to 21.3 mV and achieved an average CE of 90.53% over 100 cycles at 1 mA cm−2 (2 mAh cm−2). It also delivered stable symmetric-cell cycling (210 h at 0.25 mA cm−2) with low polarization and improved LFP full-cell discharge capacity retention. Overall, embedding lithiophilic sites within a lightweight carbon nanotube (CNT) scaffold provides a practical route to more uniform Li plating and enhanced reversibility for AFLBs.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662083","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

Recent Advances in Direct Elimination of Carboxylic Acids to Olefins 羧酸直接消除制烯烃的研究进展

IF 3.2 3区化学

Chemistry - An Asian Journal Pub Date : 2026-08-03 DOI: 10.1002/asia.70922

Yi Zhou, Zhanzhou Wei, Yabing Zhang, Yunfei Zhang, Kehan He

{"title":"Recent Advances in Direct Elimination of Carboxylic Acids to Olefins","authors":"Yi Zhou, Zhanzhou Wei, Yabing Zhang, Yunfei Zhang, Kehan He","doi":"10.1002/asia.70922","DOIUrl":"https://doi.org/10.1002/asia.70922","url":null,"abstract":"<div>\u0000 \u0000 The direct elimination of carboxylic acids to olefins offers an atom-economical and sustainable strategy for synthesizing valuable alkenes from abundant, stable, and inexpensive precursors. This review systematically summarizes recent advances (through 2025) in reaction systems and mechanistic studies in this transformation, encompassing thermal, transition metal catalysis (e.g., Rh, Pd, Ir, Ni, Cu, Fe), photochemical, and electrochemical pathways. Within this framework, we highlight progress in catalyst design—including ligand optimization and the development of earth-abundant metal and rare metal catalysts—activation modes (e.g., through the formation of anhydrides, or via direct decarboxylation), and the implementation of greener reaction conditions. While significant progress has been made in thermal and transition metal-catalyzed methods, challenges persist, including cost, metal recovery, and the need for harsh conditions. Emerging photochemical and electrochemical approaches provide milder and more environmentally benign alternatives; however, issues regarding selectivity, scalability, and reagent sustainability demand further investigation. This overview aims to serve as a comprehensive knowledge base and practical reaction guide, inspiring future research to overcome existing limitations and advance the practical, sustainable synthesis of olefins via elimination of carboxylic acids.\u0000 </div>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":"21 15","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662268","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