Chinese Chemical Letters最新文献_第6页

Potassium-modified carbon nitride photocatalyzed-aminoacylation of N‑sulfonyl ketimines 钾改性氮化碳光催化 N-磺酰基酮亚胺的氨基化反应

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-16 DOI: 10.1016/j.cclet.2024.110250

Cailing Wu , Shaojie Wu , Qifei Huang , Kai Sun , Xianqiang Huang , Jianji Wang , Bing Yu

{"title":"Potassium-modified carbon nitride photocatalyzed-aminoacylation of N‑sulfonyl ketimines","authors":"Cailing Wu , Shaojie Wu , Qifei Huang , Kai Sun , Xianqiang Huang , Jianji Wang , Bing Yu","doi":"10.1016/j.cclet.2024.110250","DOIUrl":"10.1016/j.cclet.2024.110250","url":null,"abstract":"<div><div>The development of innovative and sustainable catalytic strategies for organic synthesis is a pivotal aspect of advancing material science and chemical engineering. This research presents a new catalytic method for the aminoacylation of <em>N</em>‑sulfonyl ketimines by utilizing a potassium-doped graphite-like carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) framework. This method not only enhances the catalytic efficiency and broadens the light absorption spectrum of g-C<sub>3</sub>N<sub>4</sub> but also significantly reduces the recombination rate of electron-hole pairs, thereby increasing the reaction yield and selectivity. Importantly, our approach facilitates the synthesis of aminoacylated <em>N</em>-heterocycles, expanding the applicability of potassium-modified g-C<sub>3</sub>N<sub>4</sub> in photocatalytic organic synthesis. A notable accomplishment of this study is the unprecedented generation of carbamoyl radicals <em>via</em> heterogeneous photocatalysis, which can be easily recycled after reaction. This advancement highlights the capability of potassium-doped g-C<sub>3</sub>N<sub>4</sub> (namely <strong>K-CN</strong>) as an advanced heterogeneous photocatalyst for the formation of complex organic compounds.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 2","pages":"Article 110250"},"PeriodicalIF":9.4,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846336","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

Tuning Stark effect by defect engineering on black titanium dioxide mesoporous spheres for enhanced hydrogen evolution 通过在黑色二氧化钛介孔球体上实施缺陷工程来调谐斯塔克效应，从而提高氢气进化能力

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-15 DOI: 10.1016/j.cclet.2024.110254

Bingke Zhang , Dongbo Wang , Jiamu Cao , Wen He , Gang Liu , Donghao Liu , Chenchen Zhao , Jingwen Pan , Sihang Liu , Weifeng Zhang , Xuan Fang , Liancheng Zhao , Jinzhong Wang

{"title":"Tuning Stark effect by defect engineering on black titanium dioxide mesoporous spheres for enhanced hydrogen evolution","authors":"Bingke Zhang , Dongbo Wang , Jiamu Cao , Wen He , Gang Liu , Donghao Liu , Chenchen Zhao , Jingwen Pan , Sihang Liu , Weifeng Zhang , Xuan Fang , Liancheng Zhao , Jinzhong Wang","doi":"10.1016/j.cclet.2024.110254","DOIUrl":"10.1016/j.cclet.2024.110254","url":null,"abstract":"<div><p>Defects can strongly affect the lattice, strain, and electronic structures of nanomaterials photocatalysts, like a double-edged sword of both positive significance and negative influence on photocatalytic performances. To date, most studies into defects only partially elucidated their beneficial or detrimental roles in photocatalysis. However, a quantitative understanding of the photocatalytic performances modulated by defect concentration still needs to be discovered. Here, a series of TiO<sub>2−</sub><sub>X</sub> mesoporous spheres (MS) with different oxygen vacancy concentrations for photocatalytic applications were prepared by high-temperature chemical reduction. The link between oxygen vacancy concentration and photocatalytic performance was successfully established. The localization of carriers dominated by the Stark effect is first enhanced and then weakened with increasing oxygen vacancy concentration, which is a crucial factor in explaining the double-edged sword role of defect concentration in photocatalysis. As the reduction temperature rises to 300 °C, carrier localization dominated by the quantum-confined Stark effect maximizes the separation ability of photo generated electron hole pairs, thus exhibiting the best catalytic performance for photocatalytic hydrogen production and the degradation of organic pollutants, as demonstrated by a hydrogen evolution rate of 523.7 µmol g<sup>-1</sup> h<sup>-1</sup> and a ninefold higher RhB photodegradation rate compared to TiO<sub>2</sub> MS. The work offers excellent flexibility for precisely constructing high-performance photocatalysts by understanding vacancy engineering.</p></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"35 11","pages":"Article 110254"},"PeriodicalIF":9.4,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141693719","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

Chlorination of benzyl group on the terminal unit of A2-A1-D-A1-A2 type nonfullerene acceptor for high-voltage organic solar cells 用于高压有机太阳能电池的 A2-A1-D-A1-A2 型非富勒烯受体末端单元上的苄基氯化反应

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-11 DOI: 10.1016/j.cclet.2024.110233

Jinge Zhu , Ailing Tang , Leyi Tang , Peiqing Cong , Chao Li , Qing Guo , Zongtao Wang , Xiaoru Xu , Jiang Wu , Erjun Zhou

{"title":"Chlorination of benzyl group on the terminal unit of A2-A1-D-A1-A2 type nonfullerene acceptor for high-voltage organic solar cells","authors":"Jinge Zhu , Ailing Tang , Leyi Tang , Peiqing Cong , Chao Li , Qing Guo , Zongtao Wang , Xiaoru Xu , Jiang Wu , Erjun Zhou","doi":"10.1016/j.cclet.2024.110233","DOIUrl":"10.1016/j.cclet.2024.110233","url":null,"abstract":"<div><div>Benzotriazole (BTA)-based A<sub>2</sub>-A<sub>1</sub>-D-A<sub>1</sub>-A<sub>2</sub> type wide-bandgap (WBG) non-fullerene acceptors (NFAs) have shown promising potential in indoor photovoltaic, and in-depth investigation of their structure-property relationship is of great significance. Herein, we explored the chlorination effect of the side chain on the terminals. We introduced Cl atoms into the benzyl side chains in parent BTA5 to synthesize two NFAs, BTA5-Cl with mono-chlorinated benzyl groups and BTA5-2Cl containing bi-chlorinated benzyl groups. We chose D18-Cl with deep-energy levels and strong crystallinity to pair with these three acceptors, affording high photovoltage and photocurrent. With the stepwise chlorination, the open-circuit voltage (<em>V</em><sub>OC</sub>) values decrease from 1.28, 1.22, to 1.20 V, while the corresponding power conversion efficiencies (PCEs) improve from 5.07 %, 9.15 %, to 10.96 %. Compared with BTA5-based OSCs, introducing Cl atoms downshifts the energy levels and slightly increases the non-radiative energy loss (0.14 < 0.17 < 0.19 eV), resulting in a sequential decrease in <em>V</em><sub>OC</sub>. However, more chlorine atom replacements produce more effective exciton dissociation, higher charge transfer, and balanced carrier mobility in the blend films, ultimately achieving better PCEs. This work indicates that chlorination of the benzyl group on the terminals can improve the device's performance, implying good application potential in indoor photovoltaics.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 1","pages":"Article 110233"},"PeriodicalIF":9.4,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141690509","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

Regulating local electron transfer environment of covalent triazine frameworks through F, N co-modification towards optimized oxygen reduction reaction 通过 F、N 共修饰调节共价三嗪框架的局部电子转移环境，优化氧还原反应

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-11 DOI: 10.1016/j.cclet.2024.110235

Quanyou Guo , Yue Yang , Tingting Hu, Hongqi Chu, Lijun Liao, Xuepeng Wang, Zhenzi Li, Liping Guo, Wei Zhou

{"title":"Regulating local electron transfer environment of covalent triazine frameworks through F, N co-modification towards optimized oxygen reduction reaction","authors":"Quanyou Guo , Yue Yang , Tingting Hu, Hongqi Chu, Lijun Liao, Xuepeng Wang, Zhenzi Li, Liping Guo, Wei Zhou","doi":"10.1016/j.cclet.2024.110235","DOIUrl":"10.1016/j.cclet.2024.110235","url":null,"abstract":"<div><div>The high conductivity of electrocatalyst can eliminate the Schottky energy barrier at the interface of heterogeneous phases during an electrocatalytic reaction and accelerate the rapid electron transfer to the catalytic active center. Therefore, the electronic conductivity is a vital parameter for oxygen reduction reaction (ORR). Covalent triazine frameworks (CTFs) have shown great potential application as electrocatalysts in ORR with a merit of the diverse building blocks. However, the intrinsic low conductivity and high impedance of CTFs could be significant setbacks in electrocatalytic application. Herein, CTFs were constructed by introducing F and N co-modification for efficient 2e<sup>−</sup> ORR. Compared with the pristine CTF, the co-presence of F, N could increase the conductivity obviously by 1000-fold. As a result, F-N-CTF exhibits enhanced catalytic performance of H<sub>2</sub>O<sub>2</sub> generation and selectivity towards reaction pathways. This work reveals the importance of conductivity optimization for CTFs and provides guidance for designing high conductivity non-metallic organic semiconductor catalysts for 2e<sup>−</sup> ORR.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 1","pages":"Article 110235"},"PeriodicalIF":9.4,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141704961","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 advanced development of innovative photocatalytic coupling strategies for hydrogen production 用于制氢的创新光催化耦合战略的先进开发

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-10 DOI: 10.1016/j.cclet.2024.110234

Yuehai Zhi , Chen Gu , Huachao Ji , Kang Chen , Wenqi Gao , Jianmei Chen , Dafeng Yan

{"title":"The advanced development of innovative photocatalytic coupling strategies for hydrogen production","authors":"Yuehai Zhi , Chen Gu , Huachao Ji , Kang Chen , Wenqi Gao , Jianmei Chen , Dafeng Yan","doi":"10.1016/j.cclet.2024.110234","DOIUrl":"10.1016/j.cclet.2024.110234","url":null,"abstract":"<div><div>Photocatalytic technology harnesses solar energy to facilitate chemical transformations, presenting significant potential in energy generation and environmental remediation. However, the conventional O<sub>2</sub> evolution process is hindered by high reaction barriers and inefficiencies, which limit its widespread application. Therefore, exploring novel photocatalytic coupling strategies to replace water oxidation has become a key route to enhance the efficiency of H<sub>2</sub> production. In this review, organic pollutants removal and the valorization of organics as substitutes for water oxidation coupling strategies for photocatalytic H<sub>2</sub> production are comprehensively summarized. These strategies not only circumvent the high reaction barriers associated with O<sub>2</sub> evolution to enhance the H<sub>2</sub> production but also aid in the removing of organic pollutants or synthesis of value-added chemicals. We also present future research directions and underscore the significance of advanced catalyst design, in-depth analysis of reaction mechanisms, and systematic optimization strategies in realizing an efficient and sustainable photocatalytic process. This guidance is anticipated to provide theoretical and practical new insights for the future development of photocatalytic coupling reactions, fostering further explorations in the realm of renewable energy and environmental governance.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 1","pages":"Article 110234"},"PeriodicalIF":9.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141705307","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

Linear polyurethanes with excellent comprehensive properties from poly(ethylene carbonate) diol 具有优异综合性能的聚碳酸乙二醇线型聚氨酯

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-10 DOI: 10.1016/j.cclet.2024.110236

Xinyu Liu, Jialin Yang, Zonglin He, Jiaoyan Ai, Lina Song, Baohua Liu

{"title":"Linear polyurethanes with excellent comprehensive properties from poly(ethylene carbonate) diol","authors":"Xinyu Liu, Jialin Yang, Zonglin He, Jiaoyan Ai, Lina Song, Baohua Liu","doi":"10.1016/j.cclet.2024.110236","DOIUrl":"10.1016/j.cclet.2024.110236","url":null,"abstract":"<div><div>The synthesis of polyurethanes (PUs) from the reaction of low molecular weight poly(ethylene carbonate) diol (PECD) is rarely investigated. This work reports a novel PU with excellent mechanical properties from the solution polymerization of 4,4′-diphenylmethane diisocyanate (MDI) with PECD that was derived from the copolymerization of carbon dioxide (CO<sub>2</sub>) and ethylene oxide (EO). The tensile strength, the elongation at break and 300 % constant tensile strength of the PECD-PU were up to 66 ± 2 MPa, 880 % ± 50 % and 13 MPa, respectively, higher than the control PUs from the reaction of MDI with commercial polyethers or polyesters. The PECD-PU with high CO<sub>2</sub> carbonate content exhibited good solvent resistance and chemical stability. Of importance, the mechanical properties and chemical resistance of PECD-PU were significantly enhanced with the increasing content of CO<sub>2</sub>, <em>i.e.</em>, the carbonate unit in PECD. This work provides comprehensive properties of PECD-derived PUs, indicating that PECD is a competitive precursor for the preparation of PU and has broad application prospects.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 1","pages":"Article 110236"},"PeriodicalIF":9.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695606","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

Methanol steam mediated corrosion engineering towards high-entropy NiFe layered double hydroxide for ultra-stable oxygen evolution 甲醇蒸汽介导的腐蚀工程，实现高熵镍铁层状双氢氧化物的超稳定氧进化

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-10 DOI: 10.1016/j.cclet.2024.110232

Jinqiang Gao , Haifeng Yuan , Xinjuan Du , Feng Dong , Yu Zhou , Shengnan Na , Yanpeng Chen , Mingyu Hu , Mei Hong , Shihe Yang

{"title":"Methanol steam mediated corrosion engineering towards high-entropy NiFe layered double hydroxide for ultra-stable oxygen evolution","authors":"Jinqiang Gao , Haifeng Yuan , Xinjuan Du , Feng Dong , Yu Zhou , Shengnan Na , Yanpeng Chen , Mingyu Hu , Mei Hong , Shihe Yang","doi":"10.1016/j.cclet.2024.110232","DOIUrl":"10.1016/j.cclet.2024.110232","url":null,"abstract":"<div><div>Rational design of viable routes to obtain efficient and stable oxygen evolution reaction (OER) electrocatalysts remains challenging, especially under industrial conditions. Here, we provide a solvent-steam assisted corrosion engineering strategy to directly fabricate high-entropy NiFe-LDH with spatially resolved structural order. Ammonium fluoride in methanol steam enables the formation of nanosheets while Fe<sup>3+</sup> effectively enhances their adhesion to the semi-sacrificial nickel-iron foam (NFF), thereby conjuring up a NiFe-LDH@NFF catalyst that exhibits remarkable adaptability to robust electrochemical activation yet with excellent stability. Comprehensive measurements reveal the <em>in-situ</em> formation of high-valance metal oxyhydroxide and the enhancement of adsorption-desorption process. Under the industrial condition (6 mol/L KOH, 60 °C), the NiFe-LDH@NFF exhibits excellent activity of 50 mA/cm<sup>2</sup> at 1.55 V and high durability of over 120 h at 200 mA/cm<sup>2</sup>. We anticipate that the steam assisted strategy could promote the development of efficient non-precious electrocatalysts for hydrogen energy.</div></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":"36 1","pages":"Article 110232"},"PeriodicalIF":9.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141715263","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

Approved delivery strategies for biopharmaceuticals 已获批准的生物制药给药策略

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-08 DOI: 10.1016/j.cclet.2024.110225

Makhloufi Zoulikha , Zhongjian Chen , Jun Wu , Wei He

引用次数: 0

Cross-section design of the flow channels in membrane electrode assembly electrolyzer for CO2 reduction reaction through numerical simulations 通过数值模拟设计用于二氧化碳还原反应的膜电极组件电解槽的流道截面

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-06 DOI: 10.1016/j.cclet.2024.110204

Lili Zhang , Hui Gao , Gong Zhang , Yuning Dong , Kai Huang , Zifan Pang , Tuo Wang , Chunlei Pei , Peng Zhang , Jinlong Gong

引用次数: 0

Recent progress in the biomedical application of PEDOT:PSS hydrogels PEDOT:PSS 水凝胶生物医学应用的最新进展

IF 9.4 1区化学

Chinese Chemical Letters Pub Date : 2024-07-06 DOI: 10.1016/j.cclet.2024.109810

Binhan Zhao , Zheng Li , Lan Zheng , Zhichao Ye , Yuyang Yuan , Shanshan Zhang , Bo Liang , Tianyu Li

引用次数: 0