CCS Chemistry最新文献_第7页

Isomer-Selective Generation of Cytidine Radicals via Wavelength-Regulated Photodissociation 通过波长调节光解离生成胞苷自由基的异构体选择性

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404201

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Organic Mixed Ionic-Electronic Conductors for Solid-State Batteries 用于固态电池的有机混合离子电子导体

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404284

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Molecular Skeletons Modification Induces Distinctive Aggregation Behaviors and Boosts the Efficiency Over 19% in Organic Solar Cells 分子骨架修饰可诱导独特的聚集行为，并将有机太阳能电池的效率提高 19% 以上

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404482

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Expansion Strategy-Driven Micron-Level Resolution Mass Spectrometry Imaging of Lipids in Mouse Brain Tissue 小鼠脑组织中脂类的微米级分辨率质谱成像扩展策略

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404002

Yik Ling Winnie Hung, Chengyi Xie, Jianing Wang, Xin Diao, Ruxin Li, Xiaoxiao Wang, Shulan Qiu, Jiacheng Fang, Zongwei Cai

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Cationic Conjugated Polymers with Enhanced Doped-State Planarity for n-Type Organic Thermoelectrics 用于 n 型有机热电的具有增强掺杂态平面性的阳离子共轭聚合物

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404274

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Ni–Al Bimetal-Catalyzed Tertiary C(sp3)–H Activation for Dual C–H Annulation of Formamides with Alkynes 镍-铝双金属催化三级 C(sp3)-H活化用于甲酰胺与炔烃的双 C-H 嵌合反应

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404549

Yi Li, Yu-Peng Liu, Mengying Xu, Weiwei Xu, Feng-Ping Zhang, Mengchun Ye

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Three-Dimensional Interlocked Crystalline Frameworks for Photocatalytic CO2 Conversion 用于光催化二氧化碳转化的三维交错晶体框架

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404171

Wei Zhou, Mengqian Xu, Xiao Wang, Xu Fang, Xi Chen, Qingkun Kong, Ruiling Zhang, Lei Sun, Liyuan Zhao, Xing Lu, Wei-Qiao Deng, Chengcheng Liu

{"title":"Three-Dimensional Interlocked Crystalline Frameworks for Photocatalytic CO2 Conversion","authors":"Wei Zhou, Mengqian Xu, Xiao Wang, Xu Fang, Xi Chen, Qingkun Kong, Ruiling Zhang, Lei Sun, Liyuan Zhao, Xing Lu, Wei-Qiao Deng, Chengcheng Liu","doi":"10.31635/ccschem.024.202404171","DOIUrl":"https://doi.org/10.31635/ccschem.024.202404171","url":null,"abstract":"Three-dimensional (3D) interlocking frameworks are attracting increasing research attention owing to their intriguing mechanical properties, large surface areas, and rich open sites. The study in this paper entailed the first use of tuning solvents to realize the synthesis of metal–organic frameworks (MOFs) and metallosalen-based covalent–organic frameworks (COFs) with similar 3D interlocked structures from the same precursors. These interlocking crystalline frameworks are efficient catalysts for CO2 photoreduction. Our study is the first to investigate the impact of differences in the metal coordination environment within structurally similar COFs and MOFs in CO2 photoreduction activity. Among the materials tested, the photocatalytic performance of the M-N2O4-MOFs (M = Zn, Co, and Ni) was found to be superior to that of their M-N2O2-COF counterparts. Notably, the Ni-N2O4-MOF achieved a CO production rate of 3.96 mmol g−1 h−1 and a CO selectivity of 93.7%. In contrast, the Ni-N2O2-COF exhibited a production rate of only 0.64 mmol g−1 h−1 with a 61.1% CO selectivity. Furthermore, a descriptor for the CO evolution rate was derived from the conduction band minimum and the reaction energy of the rate-determining step, which are two key factors influencing photocatalytic activity. This study opens up new avenues for employing interlocking crystalline frameworks in the efficient photoreduction of CO2.","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"14 1","pages":""},"PeriodicalIF":11.2,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

The Synergetic Effect of Dual Active Sites in ZnO-ZrO2 Catalyst for CO2 Hydrogenation to Methanol ZnO-ZrO2 催化剂中的双活性位在二氧化碳加氢制甲醇中的协同效应

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-27 DOI: 10.31635/ccschem.024.202404243

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Internal and External Cooperation of Pt/SiC-Ni Catalyst Affording Unexpected Performance of Direct Methanol Fuel Cell 铂/碳化硅-镍催化剂的内外协同作用为直接甲醇燃料电池带来意想不到的性能

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-26 DOI: 10.31635/ccschem.024.202404344

Chenjia Liang, Ruiyao Zhao, Xiaoxia Hou, Jun Yao, Liwen Wang, Teng Chen, Yingxuan Zhao, Taotao Zhao, Jie Yang, Rurong Liu, Xianghao Wang, Xiangke Guo, Nianhua Xue, Luming Peng, Tao Wang, Xuefeng Guo, Xiaomei Zhao, Yan Zhu, Weiping Ding

{"title":"Internal and External Cooperation of Pt/SiC-Ni Catalyst Affording Unexpected Performance of Direct Methanol Fuel Cell","authors":"Chenjia Liang, Ruiyao Zhao, Xiaoxia Hou, Jun Yao, Liwen Wang, Teng Chen, Yingxuan Zhao, Taotao Zhao, Jie Yang, Rurong Liu, Xianghao Wang, Xiangke Guo, Nianhua Xue, Luming Peng, Tao Wang, Xuefeng Guo, Xiaomei Zhao, Yan Zhu, Weiping Ding","doi":"10.31635/ccschem.024.202404344","DOIUrl":"https://doi.org/10.31635/ccschem.024.202404344","url":null,"abstract":"We present here an unexpected active and robust catalyst Pt/SiC-Ni, affording a high-performance direct methanol fuel cell (DMFC) with proton exchange membrane. The unique Ni-doped SiC support is obtained by an unusual method through the reaction deposition of CH4 with NiSi2 nanoalloys at low temperatures, in open spherical-shell morphology composed of SiC-Ni nanosheets, possessing high specific surface area (410 m2 g−1) and high conductivity. The membrane electrode assembly achieves a power of ∼1.12 kW gPt−1 in DMFC with the Pt/SiC-Ni as the anodic catalyst. There are various coordination effects between the high surface area SiC with internally doped Ni and the externally loaded Pt NPs including surface reaction and mass transfer, which endows the DMFC with high power and stability. Additionally, differential electrochemical mass spectrometry and TGA-MS demonstrate the challenge of support corrosion has been significantly solved, another key factor for improving durability. The abovementioned findings are the first to demonstrate that metal-doping modified SiC materials loaded with Pt will be a highly promising catalyst for DMFC applications.","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"29 1","pages":""},"PeriodicalIF":11.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141768593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Copper-Catalyzed Asymmetric Three-Component Radical 1,2-Carboamination of Acrylamides with Arylamines: Access to Chiral α-Tertiary N-Arylamines 铜催化丙烯酰胺与丙烯胺的不对称三组份 Radical 1,2-Carboamination 反应：获得手性 α-叔 N-丙烯胺

IF 11.2 1区化学

CCS Chemistry Pub Date : 2024-07-26 DOI: 10.31635/ccschem.024.202404389

Jia-Heng Fang, Ji-Jun Chen, Xuan-Yi Du, Zhe Dong, Run-Yan Tian, Chang-Jiang Yang, Fu-Li Wang, Cheng Luan, Zhong-Liang Li, Xin-Yuan Liu

{"title":"Copper-Catalyzed Asymmetric Three-Component Radical 1,2-Carboamination of Acrylamides with Arylamines: Access to Chiral α-Tertiary N-Arylamines","authors":"Jia-Heng Fang, Ji-Jun Chen, Xuan-Yi Du, Zhe Dong, Run-Yan Tian, Chang-Jiang Yang, Fu-Li Wang, Cheng Luan, Zhong-Liang Li, Xin-Yuan Liu","doi":"10.31635/ccschem.024.202404389","DOIUrl":"https://doi.org/10.31635/ccschem.024.202404389","url":null,"abstract":"The asymmetric radical carboamination of 1,1-disubstituted alkenes from readily available alkyl halides and arylamines provides expedient access to value-added chiral α-tertiary N-arylamines but has been less recognized. A challenge arises mainly from the difficult reaction initiation inherent in alkyl halides and the construction of fully substituted chiral C–N bonds from sterically congested tertiary alkyl radicals. Herein, we report a copper-catalyzed asymmetric three-component radical carboamination of acrylamides utilizing an anionic chiral N,N,N-ligand under mild conditions. This ligand was essential for the reaction initiation by enhancing the reducing capability of copper and enabling the enantiocontrol over tertiary alkyl radicals. The substrate scope was broad, covering an array of acrylamides, aryl- and heteroaryl-amines, as well as alkyl halides and sulfonyl chlorides, enabling good functional group tolerance. When combined with the follow-up transformation, this strategy provides a versatile platform for accessing structurally diverse chiral α-tertiary N-arylamine building blocks of interest in organic synthesis.","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"10 1","pages":""},"PeriodicalIF":11.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141768591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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