Chemistry - A European Journal最新文献_第2页

Photoinduced Electron Transfer (PET) as Key to Accelerate the Cycloreversion Reaction of Arylquadricyclanes. 光致电子转移（PET）是加速芳基四环烷环还原反应的关键。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-29 DOI: 10.1002/chem.202502413

Julian Felix Maria Hebborn, Heiko Ihmels, Marco Löcker, Thomas Paululat, Robin Schulte

{"title":"Photoinduced Electron Transfer (PET) as Key to Accelerate the Cycloreversion Reaction of Arylquadricyclanes.","authors":"Julian Felix Maria Hebborn, Heiko Ihmels, Marco Löcker, Thomas Paululat, Robin Schulte","doi":"10.1002/chem.202502413","DOIUrl":"https://doi.org/10.1002/chem.202502413","url":null,"abstract":"The development of methods for the utilization of sustainable energy resources is an important scientific challenge. In one approach, the conversion and storage of solar light energy as chemical energy in a photoreaction has been established, namely as molecular solar thermal energy storage (MOST). In particular, the norbornadiene-quadricyclane system offers favorable photochemical and physicochemical properties for this purpose. However, the chemical reaction to release the stored energy, i.e., the cycloreversion of the quadricyclane, still requires improvement. In this context, we demonstrate that a fast and controlled cycloreversion of 2-(5-(1-methoxynaphthyl))quadricyclane can be accomplished in a photoinduced electron transfer (PET) reaction. Specifically, we identified 9-mesityl-10-methylacridinium, 9,10-dicyanoanthracene, and 9-nitrobenzo[b]quinolizinium as suitable catalysts that initiate the fast cycloreversion of the quadricyclane to the norbornadiene with visible light (420 nm) and with low catalyst loading. At the same time, there is no significant loss of favorable MOST properties, namely half-life and energy storage density. Thus, this method provides an efficient, complementary tool for the targeted cycloreversion of quadricyclane with high temporal and local control, as required for MOST applications.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02413"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184345","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

Dipolar Molecular Motor Candidates with Planar Chirality. 具有平面手性的偶极分子候选马达。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-29 DOI: 10.1002/chem.202502277

Thomas A Hector, Shohei Katao, Nathalie Saffon-Merceron, Valentin Magné, Claire Kammerer, Gwénaël Rapenne

{"title":"Dipolar Molecular Motor Candidates with Planar Chirality.","authors":"Thomas A Hector, Shohei Katao, Nathalie Saffon-Merceron, Valentin Magné, Claire Kammerer, Gwénaël Rapenne","doi":"10.1002/chem.202502277","DOIUrl":"https://doi.org/10.1002/chem.202502277","url":null,"abstract":"Two molecular motor candidates built around ruthenium(II) centers featuring both planar chirality and a permanent dipole have been synthesized in seven steps. These motors incorporate desymmetrized cyclopentadienyl ligands bearing electron-donating (4-methoxyphenyl) and electron-withdrawing (3,5-bis(trifluoromethyl)phenyl) groups in 1,2 or 1,3 relative positions, to induce strong dipolar moments and asymmetry helpful for unidirectional rotation. Two dipolar pentaarylcyclopentadienyl ligands were synthesized and coordinated to a Ru(II) trisindazolylborate complex functionalized with thioether moieties for surface anchoring. Structural analysis and DFT calculations revealed that dipole moments increase upon complexation, reaching 5.60 D and 4.58 D for the 1,2-CpAr5[Ru]Tp and 1,3-CpAr5[Ru]Tp complexes, respectively. Key synthetic challenges, such as low yields in Knoevenagel condensations and side reactions, were addressed through careful modulation of precursors, reaction conditions and cation selection. This study demonstrates the feasibility of integrating permanent dipoles and chirality into molecular motor design, which could offer an enhanced control over motion under STM-induced electric fields.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02277"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184371","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

Enhanced Ring-Opening Efficiency of Fluorescence Photochromic Switches Based on Benzo[e]-Fused Dimethyldihydropyrene. 苯并[e]-熔融二甲基二氢芘增强荧光光致变色开关开环效率。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-29 DOI: 10.1002/chem.202502649

Jakir Ahmed, Sanjib Ghosh, Sheelbhadra Chatterjee, Sariful Molla, Subhajit Bandyopadhyay

{"title":"Enhanced Ring-Opening Efficiency of Fluorescence Photochromic Switches Based on Benzo[e]-Fused Dimethyldihydropyrene.","authors":"Jakir Ahmed, Sanjib Ghosh, Sheelbhadra Chatterjee, Sariful Molla, Subhajit Bandyopadhyay","doi":"10.1002/chem.202502649","DOIUrl":"https://doi.org/10.1002/chem.202502649","url":null,"abstract":"Fluorophores have a significant impact on the photoswitching efficiency of photochromic systems such as azobenzene, dithienylethene, and spiropyrans by facilitating energy transfer processes that modulate the photoisomerization dynamics. In this study, we investigate the effect of side-chain functionalization of benzo[e]-fused dimethyldihydropyrene (BDHP) photochromic system with carefully selected fluorophores, namely anthracene and coumarin, on the ring-opening photoisomerization efficiency to the corresponding cyclophanediene (BCPD) form. The corresponding phenyl and naphthyl derivatives and the unsubstituted parent BDHP were studied as controls. Comprehensive photophysical analyses, including absorption and emission spectroscopy, along with quantum yield measurements, demonstrate efficient energy transfer from the attached fluorophores to the BDHP core, leading to an enhanced BDHP→BCPD isomerization process. This energy transfer mechanism significantly enhances the photoisomerization efficiency, resulting in more than a twofold increase in the ring-opening quantum yield compared to the nonfunctionalized BDHP controls. Additionally, the efficiency of photoisomerization of the coumarin-substituted derivative was extended in the switching studies in embedded solid polymeric matrices with efficient reversible photoisomerization, photostability over multiple switching cycles, and an all-optical logic gate. These findings demonstrate a promising strategy to improve the performance of the BDHP photochromic systems and their potential applications in molecular logic devices in thin film.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02649"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184352","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

Coal-Derived Carbon Support Regulates Interfacial Water Molecules toward Enhanced Alkaline Hydrogen Evolution on Platinum Nanoparticles. 煤源碳载体调控界面水分子在铂纳米颗粒上增强碱性氢的析出。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-29 DOI: 10.1002/chem.202502522

Rongrong Tao, Qian Sun, Jiaxin Zhang, Guoqiang Zhao, Aidong Tang, Huaming Yang

{"title":"Coal-Derived Carbon Support Regulates Interfacial Water Molecules toward Enhanced Alkaline Hydrogen Evolution on Platinum Nanoparticles.","authors":"Rongrong Tao, Qian Sun, Jiaxin Zhang, Guoqiang Zhao, Aidong Tang, Huaming Yang","doi":"10.1002/chem.202502522","DOIUrl":"https://doi.org/10.1002/chem.202502522","url":null,"abstract":"Carbon-supported platinum (Pt) nanoparticles (NPs) are efficient electrocatalysts for the hydrogen evolution reaction (HER) but suffer from suboptimal kinetics in alkaline media. While restructuring interfacial water molecules offers a promising route to enhance alkaline HER, simple and effective strategies remain scarce. Here, we prepared Pt NPs on different carbon supports with varied compositions of oxygen-containing functional groups (OFGs) and explored the correlation between the HER activity and the OFG composition. Structural analyses confirm negligible effects of the support on the morphology, size, or electronic states of Pt NPs. However, in situ Raman spectroscopy reveals that OFGs, including carbonyl (C = O) and carboxyl (COOH) groups increase the proportion of interfacial free water molecules by reorganizing local hydrogen bonding. Meanwhile, a bituminous coal-derived carbon (bitu@C), featuring abundant OFGs, was developed as a functional support for Pt NPs. The Pt/bitu@C catalyst achieves a mass activity of 1.33 A mgpt -1 at an overpotential of 100 mV, significantly outperforming commercial carbon-supported counterparts, while exhibiting enhanced stability. This work highlights the critical role of OFGs in modulating water structures and provides a practical, coal-derived platform for engineering interfacial water molecules toward efficient alkaline HER kinetics.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02522"},"PeriodicalIF":3.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145184410","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

Decoupling Redox Potentials and Excited State Energies in Substituted Chromium(III) Chromophores. 取代铬（III）发色团的去耦氧化还原电位和激发态能。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-27 DOI: 10.1002/chem.202502668

Steven Sittel, Dimitri Zorn, Alexandra König, Jonas Marcel Grenz, Christoph Förster, Robert Naumann, Katja Heinze

{"title":"Decoupling Redox Potentials and Excited State Energies in Substituted Chromium(III) Chromophores.","authors":"Steven Sittel, Dimitri Zorn, Alexandra König, Jonas Marcel Grenz, Christoph Förster, Robert Naumann, Katja Heinze","doi":"10.1002/chem.202502668","DOIUrl":"https://doi.org/10.1002/chem.202502668","url":null,"abstract":"Redox and excited state properties of classical organic and precious metal charge-transfer (CT) photocatalysts can be tuned by substituent effects-however, not independently, as redox and chromophore units are strongly entangled. In contrast, substituent effects should selectively address electrochemical properties of photoactive complexes based on metal-centered spin-flip (SF) excited states lacking CT character without compromising excited state properties. Yet, detailed structure-activity relationships for SF chromophores are lacking. We demonstrate that the redox potentials of polypyridine chromium(III) complexes, that feature purely metal-centered SF states, can be selectively tuned by incremental substituent effects, while the excited state energies and lifetimes remain unaffected. This delivers a unique series of chromophores with identical optical properties, but redox potentials tuned by increments. We believe, that such precisely designed chromophore series provide a unique tool for the systematic investigation of photoredox reactions and recombination processes relevant to photoredox catalytic cycles.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02668"},"PeriodicalIF":3.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145172126","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

Versatile Palladium-Catalyzed C-H Arylation of Fluoroarenes with 2-Chloropyridine Derivatives. 钯催化氟芳烃与2-氯吡啶衍生物的C-H芳基化反应。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-27 DOI: 10.1002/chem.202502723

Federico Belnome, Péter P Fehér, András Stirling, Csongor G Németh, Tamás Hergert, György M Keserű, Péter Ábrányi-Balogh

引用次数: 0

Hole-Selective Self-Assembled Monolayers Overlaid on NiO_x or PEDOT:PSS for Tin-Based Perovskite Solar Cells - An Overview of Recent Characterization Methods. 锡基钙钛矿太阳能电池覆盖NiOx或PEDOT:PSS的自组装单层膜-最新表征方法综述。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-27 DOI: 10.1002/chem.202502461

Donghoon Song, Seung Wook Shin, Hui-Ping Wu, Eric Wei-Guang Diau

{"title":"Hole-Selective Self-Assembled Monolayers Overlaid on NiOx or PEDOT:PSS for Tin-Based Perovskite Solar Cells - An Overview of Recent Characterization Methods.","authors":"Donghoon Song, Seung Wook Shin, Hui-Ping Wu, Eric Wei-Guang Diau","doi":"10.1002/chem.202502461","DOIUrl":"https://doi.org/10.1002/chem.202502461","url":null,"abstract":"Self-assembled monolayers (SAMs) with high hole-selectivity have seen growing use in the research realm of perovskite solar cells (PSCs). Even though SAMs can be used solely, their hole-selective performance is amplifiable on a p-type underlayer such as nickel oxide (NiOx) or poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS). This is especially prominent in lead-free tin-based PSCs. Herein, we review recent relevant publications on hole-selective SAMs overlaid on NiOx or PEDOT:PSS for tin PSCs. We first examine the characteristic features of the SAMs introduced in each publication. Since SAMs can affect the surface properties, interfacial properties, and perovskite quality, we focus on how these aspects are characterized and which methods are employed. In particular, the employed methods are various spanning computational simulations, microscopy imaging and electrochemical, spectroscopic, and crystallographic measurements. Through this review, we aim to encourage researchers to explore these aspects and methodologies in future research on hole-selective SAMs for tin PSCs.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02461"},"PeriodicalIF":3.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145172143","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

(2-Phosphinophenyl)aluminum Dichloride Complexes as Intramolecular Al/P Frustrated Lewis Pairs for Ketone, Ester, and Imine Activation. （2-膦苯基）二氯化铝配合物作为分子内Al/P受挫刘易斯对对酮、酯和亚胺的活化。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-27 DOI: 10.1002/chem.202502450

Yoshihiro Nishimoto, Hirotaka Okamoto, Makoto Yasuda

引用次数: 0

Enhanced Solid-State Luminescence of Supramolecular Tessellation Assemblies Through Förster Resonance Energy Transfer From Counterions. 通过Förster反离子共振能量转移增强超分子镶嵌组件的固态发光。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-27 DOI: 10.1002/chem.202502612

Baoqi Wu, Rongzhi Tang, Zhi-Wei Li, Feng Lin, Yuzhe Pi, Xinxin Li, Jinlin Chen, Hongwei Liu, Yu Tan, Gangfeng Ouyang

{"title":"Enhanced Solid-State Luminescence of Supramolecular Tessellation Assemblies Through Förster Resonance Energy Transfer From Counterions.","authors":"Baoqi Wu, Rongzhi Tang, Zhi-Wei Li, Feng Lin, Yuzhe Pi, Xinxin Li, Jinlin Chen, Hongwei Liu, Yu Tan, Gangfeng Ouyang","doi":"10.1002/chem.202502612","DOIUrl":"https://doi.org/10.1002/chem.202502612","url":null,"abstract":"The development of straightforward strategies for constructing supramolecular tessellations with enhanced solid-state luminescence has attracted growing interest in supramolecular chemistry and luminescent materials. Herein, we report the formation of diverse supramolecular tiling patterns by combining electron-deficient bipyridinium-based cationic macrocycles with either naphthalene-1-sulfonate or naphthalene-2-sulfonate counterions directly. Single-crystal X-ray diffraction reveals distinct tessellated superstructures assembled from 3,3'-bipyridinium macrocycles, stabilized by a network of electrostatic interactions, hydrogen bonding, π···π stacking, and CH···π interactions. These assemblies exhibit red-shifted and enhanced solid-state fluorescence, attributed to Förster resonance energy transfer (FRET) between the macrocycles and their aromatic counterions. Crystallographic and computational studies provide molecular-level insights into the noncovalent forces governing both the assembly process and luminescence enhancement. This work establishes a facile design strategy for constructing luminescent supramolecular tessellations and offers a deeper understanding of their structure-property relationships.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02612"},"PeriodicalIF":3.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145172073","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

Hydrogen Bond Reformation in Tetracarboxylic Acid-Based Organic Frameworks with Square Lattice Topology. 方阵结构的四羧酸基有机骨架氢键重整。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-26 DOI: 10.1002/chem.202502303

Haruka Tsuji, Ichiro Hisaki

引用次数: 0