Science China Chemistry最新文献_第4页

Investigation into the molecular engineering of xanthene-derived AIE tunable fluorescent switching dyes: experimental and theoretical approaches 杂蒽衍生AIE可调荧光开关染料的分子工程研究：实验和理论方法

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-22 DOI: 10.1007/s11426-024-2664-3

Rui Guo, Wenhui Song, Jiyoung Yoo, Changyu Yoon, Yinhu Ai, Yan Yin, Tony D. James, Jong Seung Kim, Weiying Lin

{"title":"Investigation into the molecular engineering of xanthene-derived AIE tunable fluorescent switching dyes: experimental and theoretical approaches","authors":"Rui Guo, Wenhui Song, Jiyoung Yoo, Changyu Yoon, Yinhu Ai, Yan Yin, Tony D. James, Jong Seung Kim, Weiying Lin","doi":"10.1007/s11426-024-2664-3","DOIUrl":"10.1007/s11426-024-2664-3","url":null,"abstract":"<div><p>Dyes endowed with aggregation-induced emission (AIE) properties represent a very significant class of chromophores. Nonetheless, current AIE dyes have yet to possess a readily tunable fluorescence switching mechanism. Here, we delineate a structurally distinctive family of dyes, termed <b>XD</b> dyes, which exhibit AIE attributes. Notably, the novel <b>XD</b> dyes feature an intrinsic helical cyclization as a tunable fluorescence switch, conferring them with an advantage over conventional AIE fluorophores. Initially, the fluorescence of the <b>XD</b> dyes in water-tetrahydrofuran mixtures was investigated through spectral analysis as the volume of the aqueous component increased. Subsequently, particle size analysis, in conjunction with scanning electron microscopy (SEM), was employed to substantiate the aggregation propensity of the <b>XD</b> dyes. Of particular significance, <b>XD-4</b> was observed for the first time to exhibit pronounced solid-state fluorescence, thereby corroborating the <b>XD</b> dyes’ capacity for robust fluorescence emission in the aggregated state. Moreover, alterations in optical properties and aggregation behavior of the <b>XD</b> dyes were elucidated theoretically through quantum chemical computations and molecular dynamics simulations. Critically, the calculated reorganization energy of <b>XD-4</b> was reduced in an aqueous medium was reduced compared to the gas phase, providing further confirmation of its AIE nature. The unique AIE characteristics of the <b>XD</b> dyes were validated through the integration of experimental data and theoretical insights, offering novel perspectives for the advancement of high-performance fluorescent dyes and probes.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"68 8","pages":"3675 - 3688"},"PeriodicalIF":9.7,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11426-024-2664-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nano-islands isolated ultrafine nanoparticles as sintering-resistant catalysts for methane dry reforming 纳米岛分离的超细纳米颗粒作为甲烷干重整的抗烧结催化剂

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-13 DOI: 10.1007/s11426-025-2663-2

Ruixuan Qin, Nanfeng Zheng

引用次数: 0

Direct regeneration of lithium-ion batteries as a promising method 锂离子电池的直接再生是一种很有前途的方法

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-12 DOI: 10.1007/s11426-025-2702-6

Guangyao Xiang, Zhi Zhu, Yuping Wu

引用次数: 0

Chemical microenvironment manipulation promotes selective photothermal CO2 hydrogenation to CO over Co-based catalysts 化学微环境操纵促进选择性光热CO2加氢到CO的CO基催化剂

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-08 DOI: 10.1007/s11426-024-2640-7

Jun Wang, Wangxi Liu, Huiting Huang, Yingfei Hu, Minyue Zhao, Zhexing Lin, Zhengwei Yang, Jianming Liu, Jianyong Feng, Tao Yu, Zhigang Zou, Zhaosheng Li

{"title":"Chemical microenvironment manipulation promotes selective photothermal CO2 hydrogenation to CO over Co-based catalysts","authors":"Jun Wang, Wangxi Liu, Huiting Huang, Yingfei Hu, Minyue Zhao, Zhexing Lin, Zhengwei Yang, Jianming Liu, Jianyong Feng, Tao Yu, Zhigang Zou, Zhaosheng Li","doi":"10.1007/s11426-024-2640-7","DOIUrl":"10.1007/s11426-024-2640-7","url":null,"abstract":"<div><p>The reverse water-gas shift (RWGS) reaction holds great promise for CO<sub>2</sub> reduction and achieving carbon neutrality, particularly when driven by renewable and abundant solar energy. Among various investigated catalysts, Co-based materials have demonstrated high catalytic activity for CO<sub>2</sub> hydrogenation, and the easily accessible Co or CoO<sub><i>x</i></sub> catalysts tend to produce CH<sub>4</sub> (via the Sabatier reaction) rather than CO (via the RWGS reaction) at relatively low temperatures (⩽ 400 °C). Besides the composition tuning to construct specific active sites (such as forming Co<sub>2</sub>C), the manipulation of the chemical microenvironment is also considered a highly effective strategy for regulating product selectivity, as have been broadly demonstrated in electrochemistry and zeolite research fields. Herein, alkaline Sr sites aiming at enhancing the CO<sub>2</sub> coverage at catalyst surface are placed in close proximity to the catalytically active Co centers, thus offering balanced supply of reactants within the reactive zone. The as-designed SrCoO<sub><i>x</i></sub> catalyst through <i>in situ</i> decomposition of the SrCoO<sub>2.52</sub> precursor exhibits a significant enhancement in CO selectivity (from 42% to 91%) and exceptional stability throughout a 300-h continuous reaction. This work broadens the application scope of chemical microenvironment manipulation strategies and introduces a novel avenue for future photothermal catalyst development.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"68 9","pages":"4399 - 4407"},"PeriodicalIF":9.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145011499","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

Transition metal-catalyzed selective hydroboration of allenes 过渡金属催化的烯烃选择性硼化反应

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-06 DOI: 10.1007/s11426-024-2561-y

Yun-Xuan Tan, Li-Juan Song, Xinhao Zhang, Yun-Dong Wu, Jianwei Sun

引用次数: 0

A wide-temperature Li/Cl2 battery using an ester-based electrolyte 采用酯基电解质的宽温锂/Cl2电池

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-05-06 DOI: 10.1007/s11426-024-2624-3

Bin Yuan, Qiuchen Xu, Shanshan Tang, Shitao Geng, Qianyun Chen, Yan Wang, Xiaoju Zhao, Chengxiao Zhang, Shuo Wang, Zhaofeng Ouyang, Hao Sun

{"title":"A wide-temperature Li/Cl2 battery using an ester-based electrolyte","authors":"Bin Yuan, Qiuchen Xu, Shanshan Tang, Shitao Geng, Qianyun Chen, Yan Wang, Xiaoju Zhao, Chengxiao Zhang, Shuo Wang, Zhaofeng Ouyang, Hao Sun","doi":"10.1007/s11426-024-2624-3","DOIUrl":"10.1007/s11426-024-2624-3","url":null,"abstract":"<div><p>A rechargeable lithium/chlorine (Li/Cl<sub>2</sub>) battery is a promising candidate for energy storage applications. However, the highly corrosive thionyl chloride (SOCl<sub>2</sub>) solvent in the conventional electrolyte has hindered their practical production and application. Here, we discover that methyl chlorodifluoroacetate (MCDFA), a mild ester, can serve as an effective alternative to SOCl<sub>2</sub> to solve the above challenge. The resultant battery using the MCDFA-based electrolyte exhibits a wide operation temperature range from −40 °C to 120 °C, a significant enhancement over conventional rechargeable Li/Cl<sub>2</sub> batteries, and is also competitive among state-of-the-art wide-temperature Li metal batteries. Our results offer an effective strategy to address the corrosivity of the SOCl<sub>2</sub>-based electrolyte in rechargeable Li/Cl<sub>2</sub> batteries, and open a new avenue for practical and sustainable energy storage applications.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"68 9","pages":"4408 - 4414"},"PeriodicalIF":9.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145011687","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

Noncorrosive organic electrolytes for wide-temperature metal-chlorine batteries 宽温度金属氯电池用无腐蚀性有机电解质

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-04-28 DOI: 10.1007/s11426-025-2672-y

Lei Ye, Xiaodong Chen

引用次数: 0

A new role of water in propane dehydrogenation 水在丙烷脱氢中的新作用

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-04-28 DOI: 10.1007/s11426-025-2662-5

Sai Chen, Jinlong Gong

引用次数: 0

A general electrochemical CO2 fixation to aromatic carboxylic acids via the CO2·− intermediate using a non-transition metal electrode 利用非过渡金属电极，通过CO2·−中间体对芳香羧酸进行一般的电化学CO2固定

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-04-28 DOI: 10.1007/s11426-025-2639-8

Baijing Wu, Xiaoxue Luo, Hongliang Fan, Minhua Shao, Cunpu Li, Zidong Wei

{"title":"A general electrochemical CO2 fixation to aromatic carboxylic acids via the CO2·− intermediate using a non-transition metal electrode","authors":"Baijing Wu, Xiaoxue Luo, Hongliang Fan, Minhua Shao, Cunpu Li, Zidong Wei","doi":"10.1007/s11426-025-2639-8","DOIUrl":"10.1007/s11426-025-2639-8","url":null,"abstract":"<div><p>CO<sub>2</sub> fixation is important for reducing the greenhouse effect and improving clean energy use. While recent studies focus on converting CO<sub>2</sub> to liquid fuels, direct fixation into high-value compounds like aromatic carboxylic acids provides an alternative path. Herein, we report a general electrochemical CO<sub>2</sub> fixation to aromatic carboxylic acids via the CO<sub>2</sub><sup>·−</sup> intermediate using a non-transition metal graphite electrode. Different from the conventional aromatic radical mechanism, in this report, CO<sub>2</sub> will gain electrons on the graphite electrode to generate CO<sub>2</sub><sup>·−</sup>, which will further attack aromatic halides to obtain the desired aromatic carboxylic acid via an aromatic nucleophilic substitution mechanism. As CO<sub>2</sub><sup>·−</sup> acts as the general intermediate, various aromatic compounds can be carbonylated without the need for a specific catalytic design to activate the aromatic halides. Furthermore, benefit from the CO<sub>2</sub><sup>·−</sup> nucleophile, only the <i>ipso</i>-products can be obtained compared with the conventional approaches. This method offers a flexible way to convert the greenhouse gas CO<sub>2</sub> into valuable aromatic carboxylic acids, which have applications in pharmaceutical chemistry, biochemistry and polymer chemistry. Therefore, it holds the potential for furthering the objectives of carbon neutrality and green chemistry.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"68 8","pages":"3816 - 3825"},"PeriodicalIF":9.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170856","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

Combinatorial spider-hunting strategy to design multilayer skin-like pressure-stretch sensors with precise dual-signal self-decoupled and smart object recognition ability 组合蜘蛛搜寻策略设计具有精确双信号自解耦和智能目标识别能力的多层皮肤式压力-拉伸传感器

IF 9.7 1区化学

Science China Chemistry Pub Date : 2025-04-23 DOI: 10.1007/s11426-024-2623-0

Lu Yang, Zhouyu Miao, Yanjuan Dong, Hou-Yong Yu

{"title":"Combinatorial spider-hunting strategy to design multilayer skin-like pressure-stretch sensors with precise dual-signal self-decoupled and smart object recognition ability","authors":"Lu Yang, Zhouyu Miao, Yanjuan Dong, Hou-Yong Yu","doi":"10.1007/s11426-024-2623-0","DOIUrl":"10.1007/s11426-024-2623-0","url":null,"abstract":"<div><p>Bionic electronic skin (e-skin) with intrinsic compressibility and stretchability holds significant potential in robotic haptics, enabling robots to perceive and interact with objects of various shapes effectively. However, creating a biomimetic e-skin with precise dual-signal decoupling remains a challenge. To address this, we present a bifunctional sensor inspired by the spider-hunting mechanism, which captures signals during predation. This sensor is constructed using pressure-stretched multilayer electrospinning of nanofibers-polyvinyl alcohol (CNC-PVA), followed by gas-phase polypyrrole (PPy) polymerization. The innovative superimposed design of the homologous multilayer sensing module, combined with a conductive nanofiber network structure, enables remarkable multi-signal self-decoupling capabilities. Key features of this sensor include high-pressure sensitivity (14.8 kPa <sup>−1</sup> for 0–21 kPa) and an impressively fast response time of 57 ms. As a pressure sensor, it demonstrates repeatability over 5 cycles, while as a stretching sensor, it achieves high sensitivity (gauge factor, GF=1.22) and remains stable over 1000 cycles. Furthermore, this self-decoupled sensing system can independently detect dual signals (shape and weight of objects), thereby empowering robots to recognize and handle various objects more effectively. This multifunctional, low-cost sensor offers an advanced solution to overcome problems in functional e-skin for enhanced robotic object manipulation and recognition capabilities.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":772,"journal":{"name":"Science China Chemistry","volume":"68 9","pages":"4368 - 4380"},"PeriodicalIF":9.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145011583","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