Chemistry - A European Journal最新文献

Non-metal Lewis Acid-Catalyzed Reduction of Phosphine Oxides with Silanes: Mechanistic Study and Reaction Optimization. 非金属路易斯酸催化硅烷还原氧化膦：机理研究及反应优化。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-16 DOI: 10.1002/chem.71805

Jingyang Zhang, Jiahua Pang, Xintong Liu, Wang-Yeuk Kong, Dean J Tantillo, Yefeng Tang

{"title":"Non-metal Lewis Acid-Catalyzed Reduction of Phosphine Oxides with Silanes: Mechanistic Study and Reaction Optimization.","authors":"Jingyang Zhang, Jiahua Pang, Xintong Liu, Wang-Yeuk Kong, Dean J Tantillo, Yefeng Tang","doi":"10.1002/chem.71805","DOIUrl":"https://doi.org/10.1002/chem.71805","url":null,"abstract":"Non-metal Lewis acid (NM LA)-catalyzed silane-mediated reductions represent an important strategy for the conversion of phosphine oxides to phosphines. Although a variety of catalytic systems have been developed, their underlying reaction mechanisms remain insufficiently understood. Herein, we have elucidated two unified mechanistic manifolds for these transformations based on combined computational and experimental studies: a push-pull mechanism and a silane-activation mechanism. Guided by these mechanistic insights, we further improve the conventional Brønsted acid-catalyzed silane-mediated P═O reduction by integrating NM LAs and Brønsted acids into a cooperative catalytic system. This system operates through two sequential steps: (1) NM LA-catalyzed dehydrogenative activation between Brønsted acids and phenylsilane, generating a highly reactive silane species in situ; and (2) reduction of phosphine oxides mediated by the resulting activated silane. The developed protocol exhibits broad substrate scope and high efficiency in the reduction of diverse phosphine oxides. Moreover, it is readily scalable, providing a practical approach for synthetic and industrial applications.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71805"},"PeriodicalIF":3.6,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190343","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

Visible Light Driven Diselenide Chemistry for Simultaneous 3D Patterning and Mechanical Reinforcement. 可见光驱动双硒化学同时三维图案和机械强化。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-16 DOI: 10.1002/chem.71812

Jianbing Liu, Chaowei He, Peng Zhao, Yizheng Tan, Huaping Xu

{"title":"Visible Light Driven Diselenide Chemistry for Simultaneous 3D Patterning and Mechanical Reinforcement.","authors":"Jianbing Liu, Chaowei He, Peng Zhao, Yizheng Tan, Huaping Xu","doi":"10.1002/chem.71812","DOIUrl":"https://doi.org/10.1002/chem.71812","url":null,"abstract":"Three-dimensional (3D) patterning on polymer surfaces is typically achieved by photolithography or related techniques, which often involve complex procedures, high-energy ultraviolet light, and risk of material damage. Here, we report a visible light-driven strategy that exploits the dual functionality of stress relaxation via dynamic bond exchange and radical-initiated polymerization to create raised 3D patterns on diselenide-containing polyurethane films. Under mild visible light irradiation through a photomask, the diselenide bonds undergo homolytic cleavage, enabling local stress relaxation and simultaneously generating selenium radicals that polymerize a methacrylate monomer swollen in the matrix. The resulting patterns exhibit high fidelity to the mask. The method is compatible with complex templates (letters, Braille, QR codes, and photographs) and even with a commercial projector as a maskless light source. Moreover, the large modulus contrast between the patterned phase and the pristine matrix enables strain isolation, allowing conductive coatings on illuminated regions to maintain electrical continuity under stretching. This rapid, low-damage, and versatile approach provides a new route to functional 3D surface architectures for applications in tactile displays, flexible electronics, and strain-isolated devices.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71812"},"PeriodicalIF":3.6,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190325","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

Recent Advances in Porous Cathode Hosts for Aqueous Zinc-Iodine Batteries. 水相锌碘电池多孔阴极主体研究进展。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-16 DOI: 10.1002/chem.71817

Xianshi Yang, Jiajun Wan, Weihua Xu, Jing Xu, Huibing He

{"title":"Recent Advances in Porous Cathode Hosts for Aqueous Zinc-Iodine Batteries.","authors":"Xianshi Yang, Jiajun Wan, Weihua Xu, Jing Xu, Huibing He","doi":"10.1002/chem.71817","DOIUrl":"https://doi.org/10.1002/chem.71817","url":null,"abstract":"Aqueous zinc-iodine batteries (Zn-I2) are promising candidates for large-scale energy storage due to their high theoretical capacity, intrinsic safety, and cost-effectiveness. However, their practical performance is severely hindered by the intrinsically low conductivity of I2 and its discharge products, accompanied by the notorious polyiodide shuttle effect and sluggish redox kinetics. These drawbacks collectively compromise the rate capability, cycling stability, and energy density. As the I2 cathode plays an indispensable role, engineering porous cathode hosts with tailored pore architectures and surface chemistries has emerged as a decisive strategy to overcome these bottlenecks. This review summarizes recent advances in porous materials for Zn-I2 battery cathodes, highlighting their applications as iodine hosts, including porous carbons and their composites, metal-organic frameworks (MOFs), porous organic frameworks (POFs). Special emphasis is placed on how pore architecture affects iodine confinement, polyiodide retention, mass transport, and redox kinetics. Finally, future directions for the design of high-performance porous iodine hosts are discussed. This review provides insightful guidelines for the development of next-generation high-performance Zn-I2 batteries.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71817"},"PeriodicalIF":3.6,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190329","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

A Green Protocol for the Deprotection of ortho-Nitrobenzyl Esters and Ethers by UVA-LED Irradiation. UVA-LED辐射对邻硝基苯酯和醚脱保护的绿色方案。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71791

Despoina Poikilidou, Christiana Mantzourani, George Kokotos, Christoforos G Kokotos

引用次数: 0

Assessing ZIF-8 Stability for Biomedical Applications Using Fluorescent Probes: Impact of Covalent Conjugation. 使用荧光探针评估ZIF-8在生物医学应用中的稳定性：共价偶联的影响。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71813

Michael B Stammler, Hana Bunzen

{"title":"Assessing ZIF-8 Stability for Biomedical Applications Using Fluorescent Probes: Impact of Covalent Conjugation.","authors":"Michael B Stammler, Hana Bunzen","doi":"10.1002/chem.71813","DOIUrl":"https://doi.org/10.1002/chem.71813","url":null,"abstract":"Metal-organic frameworks (MOFs) have emerged as nanocarriers for biomedical applications. However, their performance under physiological conditions is strongly governed by framework degradation processes occurring at the crystal-solution interface. Here, we systematically investigate the role of surface functionalization in controlling the stability and cargo-release behavior of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles. ZIF-8 surfaces were modified with polyethylene glycol (PEG) derivatives bearing hydroxyl, amino, and imidazole end groups, enabling comparison of different anchoring strategies involving coordinative and covalent interactions. Framework stability, surface modification, and fluorescein release as a model cargo system were evaluated using FTIR spectroscopy, XRPD, STEM, TGA, and UV-vis spectroscopy. Although PEGylation reduced fluorescein release in phosphate-buffered saline compared with unmodified ZIF-8 nanoparticles, the influence of the anchoring group was minimal, demonstrating that PEG coatings provide only limited protection against phosphate-induced surface degradation. To further elucidate the role of interfacial bonding, fluorescein derivatives directly attached to the ZIF-8 framework were investigated as molecular probes of surface stability. While the bonding mode affected dye retention in pure water, this stabilization effect was largely suppressed under phosphate-containing conditions. These results reveal the complex interplay between surface chemistry, framework degradation, and cargo release, providing design considerations for the development of MOF-based biomedical carriers.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71813"},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190369","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

Long-Afterglow Materials Enabled by the Confinement Effect of Cellulose Nanocrystals Cholesteric Liquid Crystals. 纤维素纳米晶胆甾体液晶约束作用下的长余辉材料。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71808

Sichen Meng, Shengwen Bao, Danfeng Ye, Sheng He, Zaiyuan Lin, Shuaishuai Lu, Deli Sun, Ying Liu, Liangliang Zhu

{"title":"Long-Afterglow Materials Enabled by the Confinement Effect of Cellulose Nanocrystals Cholesteric Liquid Crystals.","authors":"Sichen Meng, Shengwen Bao, Danfeng Ye, Sheng He, Zaiyuan Lin, Shuaishuai Lu, Deli Sun, Ying Liu, Liangliang Zhu","doi":"10.1002/chem.71808","DOIUrl":"https://doi.org/10.1002/chem.71808","url":null,"abstract":"Room-temperature phosphorescence (RTP) is highly sought after for optical sensing and encryption, but is constrained by triplet exciton quenching. This challenge is addressed by employing cellulose nanocrystals (CNC), specifically carboxylated CNC, as a cholesteric host and coronene tetracarboxylate (CS) as a phosphorescent guest. The self-assembled CNC matrix provides a rigid, anisotropic microenvironment through nanorod ordering and hydrogen bonding with CS, effectively suppressing non-radiative relaxation. Systematic CS loading (0.3-5 wt%) reveals optimal performance at 1 wt% (lifetime: 1.756 s, quantum yield: 9.4%, 8 s afterglow), while higher loadings disrupt ordering and induce aggregation quenching. Three application strategies are further demonstrated: doping-contrast Morse coding, water/thermal rewritable patterns, and Rhodamine B-mediated multicolor time-sequenced luminescence. Collectively, these results show that CNC cholesteric order actively enhances RTP, establishing these biocomposite films as viable materials for advanced anti-counterfeiting and encryption systems.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71808"},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190375","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

Quantitative Probing of Photoisomerization-Driven pH Changes in Metastable-State Merocyanine-Spiropyran Photoacids. 光异构化驱动亚稳态merocyanin - spiropyran光酸pH变化的定量探测。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71814

Zakkia Nizar, Nitish Kumar Nayak, Palapuravan Anees

{"title":"Quantitative Probing of Photoisomerization-Driven pH Changes in Metastable-State Merocyanine-Spiropyran Photoacids.","authors":"Zakkia Nizar, Nitish Kumar Nayak, Palapuravan Anees","doi":"10.1002/chem.71814","DOIUrl":"https://doi.org/10.1002/chem.71814","url":null,"abstract":"Photoacids are light-responsive molecular systems that convert optical energy into chemical potential through proton release, enabling precise spatiotemporal control of local acidity. Among these, merocyanine-spiropyran (MC-SP) metastable-state photoacids are particularly attractive because photoisomerization is directly coupled to reversible light-driven acid-base switching under mild conditions relevant to chemical and biological systems. Despite significant advances in molecular design, the quantitative relationship between photoisomerization and proton output remains largely unexplored. Here, we systematically investigate four structurally engineered MC-SP photoacids exhibiting distinct switching regimes, ranging from highly reversible to partially irreversible behavior. UV-vis spectroscopic analysis resolves photoisomer populations and switching kinetics, revealing pronounced substituent-dependent effects on electronic structure, photoisomerization dynamics, and photoacidity. To directly quantify proton generation, we developed a spectrally orthogonal near-infrared (NIR)-emissive pH probe that enables real-time, interference-free monitoring of pH changes during continuous photoirradiation. Quantitative analysis of both light-driven MC-to-SP conversion and dark-driven thermal SP-to-MC recovery, combined with fluorescence-based pH measurements, establishes a direct quantitative relationship between molecular photoisomerization, proton release, and proton uptake. This integrated approach establishes a mechanistic link between photoacid structure, photoisomerization dynamics, and proton output, providing design principles for metastable-state photoacids with tunable, light-controlled acidity for chemical and biological applications.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71814"},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149178120","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

Asymmetric Activation of Tropos Biphenolic Moieties by Isohexides: An Integrated Computational-Experimental Approach. 异己酸对正双酚部分的不对称活化：一种综合计算-实验方法。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71796

Giuseppe Fulvetti, Klara Mali, Filippo Lipparini, Anna Iuliano

{"title":"Asymmetric Activation of Tropos Biphenolic Moieties by Isohexides: An Integrated Computational-Experimental Approach.","authors":"Giuseppe Fulvetti, Klara Mali, Filippo Lipparini, Anna Iuliano","doi":"10.1002/chem.71796","DOIUrl":"https://doi.org/10.1002/chem.71796","url":null,"abstract":"The asymmetric activation of conformationally dynamic (tropos) biaryls through covalent bond formation with stereochemically stable chiral subunits is a powerful strategy to induce a prevalent diastereomeric conformation on chiral ligands for asymmetric catalysis. This work presents an integrated computational-experimental investigation into the capability of isohexides to induce a prevalent sense of twist on a tropos tetra-arylic moiety derived from 2,2'-dihydroxybiphenyl (BIPOL), connected to the isohexide scaffold by ester linkages, leading to the formation of macrocyclic architectures. The position of carboxylic acid groups on the tetra-aryl moiety was crucial for the cyclization reaction: this parameter was investigated by density functional theory (DFT) calculations, which successfully predicted that meta-substitution on the tetra-aryl framework is thermodynamically optimal for the purpose. The stereodynamic characterization of the newly synthesized compounds, using variable-temperature nuclear magnetic resonance (VT-NMR) and electronic circular dichroism (ECD) spectroscopies, combined with time-dependent DFT (TD-DFT) simulations demonstrated that both the sense of twist of the tetra-aryl moiety and the extent of its prevalence depend not only on the stereochemistry of the carbohydrate scaffold but also on the steric and electronic features of the 2,2'-substituents on the tetra-aryl moiety.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71796"},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190336","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

In Situ Infrared Spectroscopy Analysis of Dehydrogenation of Perhydro-N-ethylcarbazole. 过氢- n -乙基咔唑脱氢的原位红外光谱分析。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71818

Yufei Jiang, Tingzhou Li, Guofu Lu, Jin Zhou, Chaoyuan Hu, Bin Liang, Youyu Lin, Xiao Liu, Lei Xie, Jie Zheng

{"title":"In Situ Infrared Spectroscopy Analysis of Dehydrogenation of Perhydro-N-ethylcarbazole.","authors":"Yufei Jiang, Tingzhou Li, Guofu Lu, Jin Zhou, Chaoyuan Hu, Bin Liang, Youyu Lin, Xiao Liu, Lei Xie, Jie Zheng","doi":"10.1002/chem.71818","DOIUrl":"https://doi.org/10.1002/chem.71818","url":null,"abstract":"The dehydrogenation mechanism of perhydro-N-ethylcarbazole (12H-NEC), a promising liquid organic hydrogen carrier (LOHC), on Pd/Al2O3 catalyst was studied by in situ FT-IR analysis. Spectra were collected in transmission mode using a 12H-NEC/catalyst/KBr mixture pellet to overcome the difficulty of introducing low-volatility 12H-NEC. A peak-deconvolution, assignment, and normalization protocol was developed to interpret the complex C─H stretching region from 3100 to 2750 cm-1. The results indicate that dehydrogenation begins at the five-membered ring and that species spectroscopically consistent with 8H-NEC accumulate at approximately 100°C. A transient spectral state observed before this accumulation is consistent with an earlier partially dehydrogenated intermediate, for which 10H-NEC is one possible structural assignment. This work provides experimental insight into the dehydrogenation mechanism of 12H-NEC under mild conditions and may guide further efforts to improve the hydrogen-storage performance of 12H-NEC-based LOHC systems.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71818"},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149178188","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

Amphiphilic Diazocine Photoswitches: Inverted Isomer Stability and Surface Tension Modulation. 两亲性重氮嘧啶光开关：反向异构体稳定性和表面张力调制。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-15 DOI: 10.1002/chem.71811

Bastian Stövesand, Bart Jan Ravoo

引用次数: 0