Chemistry - A European Journal最新文献_第5页

Hydrogen-bonding Assisted Quantum Yield Enhancement and Chromism Activity of 4'-Halo-2'-azaboranils.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202404568

Teruki Sawada, Masamichi Yasui, Takayoshi Arai

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Front Cover: Porous Organic Polymers for CO2 Capture and Catalytic Conversion (Chem. Eur. J. 13/2025)

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202581301

Zicheng Zhong, Prof. Xiaoyan Wang, Prof. Bien Tan

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A New Generation of Sumanene-Based AIEgens for the Effective Recognition of Metal Cations in Solutions Containing 95 vol% of Water.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202500705

Jakub S Cyniak, Hidehiro Sakurai, Artur Kasprzak

{"title":"A New Generation of Sumanene-Based AIEgens for the Effective Recognition of Metal Cations in Solutions Containing 95 vol% of Water.","authors":"Jakub S Cyniak, Hidehiro Sakurai, Artur Kasprzak","doi":"10.1002/chem.202500705","DOIUrl":"https://doi.org/10.1002/chem.202500705","url":null,"abstract":"In recent years, the application of sumanene derivatives for the optical detection of metal cations was demonstrated. Unfortunately, known sumanene-based receptors enable the detection process in purely organic solutions or in aqueous media containing not lower than 50 vol% of organic solvent. Designing easy-to-synthesize sumanene-based optical receptors able to effectively recognize metal cations in aqueous solutions containing a slight volume fraction of organic solvent remained an important and vital challenge. In this work, we show that water-insoluble sumanene receptors composed of only carbon and hydrogen atoms enable the effective detection of cesium (Cs+) or lithium (Li+) cations in solutions containing 95 vol% of water. Their key feature is related to the exhibition of an aggregation-induced emission (AIE) effect. We discovered that the designed sumanene receptors exhibit excellent detection parameters expressed by Stern-Volmer constant values at the level from 108 to 1010 M-1. This work also shows that by simple modification of the sumanene receptor structure, it is possible to drastically change its detection preference from large Cs+ cations to small Li+ cations. The highest sensitivity of the designed receptors was concluded for Na+ or Li+, depending on the receptor structure. This work opens new avenues in designing sumanene-based optical receptors.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500705"},"PeriodicalIF":3.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Upgrading Electron Transfer with High Conductivity MOF Composites for Supercapacitors. 利用高导电性 MOF 复合材料提升超级电容器的电子传输性能。

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202500090

Yihao Chen, Songtao Zhang, Fancheng Sun, Xudong Chen, Yijian Tang, Ziming Qiu, Yongbin Hu, Huan Pang

{"title":"Upgrading Electron Transfer with High Conductivity MOF Composites for Supercapacitors.","authors":"Yihao Chen, Songtao Zhang, Fancheng Sun, Xudong Chen, Yijian Tang, Ziming Qiu, Yongbin Hu, Huan Pang","doi":"10.1002/chem.202500090","DOIUrl":"https://doi.org/10.1002/chem.202500090","url":null,"abstract":"Supercapacitors (SCs) have emerged as promising energy storage devices, offering flexibility and smart functionalities to meet the growing demands of modern applications. However, challenges such as limited conductivity and stability continue to hinder their performance. Herein, a conductive composite was designed by forming one-dimension rod-like conductive MOFs (Ni-HHTP) on the hierarchical nickel oxalate (Ni-OA). The extended conjugated system between Ni2+ and HHTP establishes a robust electron delocalization network, significantly enhancing the conductivity and stability of the MOFs. Simultaneously, the incorporation of Ni-HHTP with Ni-OA effectively reduces internal electron transfer impedance, improving charge transport within the delocalized electronic networks. The synthesized Ni-OA@Ni-HHTP-6//AC achieves a remarkable energy density of 24.78 Wh kg-1 at a power density of 113.03 W kg-1, with a peak power density of 2924.58 W kg-1 at an energy density of 19.68 Wh kg-1. This work provides valuable insights into the design of oxalate@conductive-MOF composites, paving the way for energy storage devices.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500090"},"PeriodicalIF":3.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Stereoselective Synthesis of 1,2-cis-α-Glycosyl Thiols and Trehalose-Type α,α'-Thiodisaccharides by Cryo Thiol-Ene Photocoupling - Thio-Click Reaction in Frozen State.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202500104

Viktor Kelemen, Miklós Bege, Nóra Debreczeni, Ilona Bereczki, Attila Csaba Bényei, Pál Herczegh, Anikó Borbás

{"title":"Stereoselective Synthesis of 1,2-cis-α-Glycosyl Thiols and Trehalose-Type α,α'-Thiodisaccharides by Cryo Thiol-Ene Photocoupling - Thio-Click Reaction in Frozen State.","authors":"Viktor Kelemen, Miklós Bege, Nóra Debreczeni, Ilona Bereczki, Attila Csaba Bényei, Pál Herczegh, Anikó Borbás","doi":"10.1002/chem.202500104","DOIUrl":"https://doi.org/10.1002/chem.202500104","url":null,"abstract":"α-Glycosyl thiols are key building blocks for the formation of stable thioglycoside mimetics of widespread and biologically relevant α-O-glycosides, which urges their efficient synthesis. Here, we demonstrate that the photoinitiated radical-mediated addition of thioacetic acid to 2-substituted glycals followed by selective S-deacetylation is a generally applicable and fully stereoselective method for the synthesis of 1,2-cis-α-glycosyl thiols. The low reactivity of thioacetic acid in the radical reaction was overcome by carrying out the reaction in AcOH at -80 °C, in frozen state, with UVA irradiation, achieving high yields irrespective of the sugar configurations. For effective irradiation and simultaneous effective cooling, a self-made spiral vessel reactor was used, which also enables large-scale synthesis. By subjecting 1,2-cis-α-1-thiosugars to a second thiol-ene coupling reaction with 2-substituted glycals, 34 trehalose-type symmetrical and unsymmetrical α,α'-thiodi- and oligosaccharides were obtained with full stereoselectivity. Moreover, the oxidation of α-1-thiosugars provided an easy access to α,α'-diglycosyl disulfides.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500104"},"PeriodicalIF":3.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Syntheses of Structurally Complex Marine Cyclopropyl-Diterpenoids: Peyssonnoside A and Its Aglycon.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202500254

Gleb A Chesnokov, Marco Schellenberg, Kevin Keller, Anthony Linden, Karl Gademann

引用次数: 0

Cover Feature: Ce[N(SiMe3)2]3(THF)3-Catalyzed Hydroboration of CO2, Esters and Epoxides with Pinacolborane: Selective Synthesis of Methanol in Multigram Scale (Chem. Eur. J. 13/2025)

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202581303

Md Jabed Hossain, Brij Kumar Shah, Soumya Ranjan Dash, Kashish, Kumar Vanka, Shabana Khan

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Cover Feature: Broken Symmetry and Elastic Frustration in Isostructural MnIII Spin Crossover Crystals (Chem. Eur. J. 13/2025)

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202581304

Conor T. Kelly, Vibe B. Jakobsen, Ross Jordan, Solveig Felton, Helge Müller-Bunz, Grace G. Morgan

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Direct Cyclization of 1,3-Diketones with Malonate-Based Iodonium Ylides to Generate Dihydrofurans.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202404442

Zhiguo Zhao, Ziqiang Zhao, Yuanling Pang, Yu-Cheng Gu, Yao Wang

引用次数: 0

The Fluoride Ion Affinity Revisited: Do We Need the Anchor-Point Approach?

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-03 DOI: 10.1002/chem.202404662

Morten Lehmann, Salimot N Balogun, Marc Reimann, Martin Kaupp

{"title":"The Fluoride Ion Affinity Revisited: Do We Need the Anchor-Point Approach?","authors":"Morten Lehmann, Salimot N Balogun, Marc Reimann, Martin Kaupp","doi":"10.1002/chem.202404662","DOIUrl":"https://doi.org/10.1002/chem.202404662","url":null,"abstract":"A large and diverse high-level benchmark data set of computed gas-phase fluoride ion affinities (FIAs) for 71 small main-group Lewis acids is presented. It has been used to evaluate quantitatively DFT approaches with 52 functionals and 4 composite methods. Two widely used indirect anchor-point methods based on isodesmic reactions with fluorophosgene or the trimethyl silyl cation are compared to the direct computation of the FIA. It has been frequently stated that anchor-point methods are to be strongly preferred over direct FIA computations at DFT levels, as they avoid treatment of the naked fluoride ion. Here it is shown that this widespread assumption does not hold when modern functionals with low self-interaction errors and suitable basis sets with diffuse functions are used. In these cases, an anchor-point approach based on OCF2 has little or no advantage, and the widely used anchor-point calculations based on Me3Si+ even deteriorate results in most cases. It is shown that this is due to a break-down of often prevailing error cancellations in the anchor-point approach that help to improve results when using less suitable functionals or basis sets. Overall, direct computations of FIAs at appropriate DFT levels including diffuse basis functions are the clearly preferable route.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202404662"},"PeriodicalIF":3.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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