Chemistry - A European Journal最新文献_第9页

Data-Driven Polyoxometalate Chemistry. 数据驱动的多金属酸盐化学。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-07 DOI: 10.1002/chem.202501528

Aleksandar Kondinski, Nadiia I Gumerova, Annette Rompel, Paolo Falcaro, Tobias Schreck

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Diastereoselective Synthesis of Tetrasubstituted Olefins from Internal Alkynes via Three-Component Reaction Using a Heterogeneous Organometallic Triptycene-Based Porous Palladium Catalyst. 三组份非均相有机金属三苯基多孔钯催化剂催化内炔非对映选择性合成四取代烯烃。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-06 DOI: 10.1002/chem.202501909

Atikur Hassan, Ayush Kumar, Sk Abdul Wahed, Nishant Mishra, Amit Kumar, Neeladri Das

{"title":"Diastereoselective Synthesis of Tetrasubstituted Olefins from Internal Alkynes via Three-Component Reaction Using a Heterogeneous Organometallic Triptycene-Based Porous Palladium Catalyst.","authors":"Atikur Hassan, Ayush Kumar, Sk Abdul Wahed, Nishant Mishra, Amit Kumar, Neeladri Das","doi":"10.1002/chem.202501909","DOIUrl":"https://doi.org/10.1002/chem.202501909","url":null,"abstract":"In this work, we report the design, synthesis, and application of a hyper-crosslinked heterogeneous organometallic porous organic polymer (Pd@TP-DPPF) catalyst for the efficient and sustainable dicarbofunctionalization of internal alkynes via a facile three-component reaction. This strategy enables the highly trans-selective syntheses of tetrasubstituted olefins in excellent yields. The catalyst is constructed by integrating triptycene (TP) and 1,1'-bis(diphenylphosphino)ferrocene (DPPF) into a robust palladium-based porous framework, resulting in a unique heterogeneous system that efficiently mediates the coupling of internal alkynes with readily available iodoarenes and aryl/methyl boronic acids. This methodology also offers a versatile strategy for the syntheses of complex and valuable trans-selective alkenylsilanes under mild conditions, with high atom economy. Mechanistic studies support a trans-selective transformation pathway facilitated by the cooperative role of the polymer support and the palladium center. Importantly, the Pd@TP-DPPF catalyst exhibits excellent recyclability, air/moisture stability, and operational simplicity, making it highly suitable for large-scale and environmentally conscious synthetic applications. This work not only addresses a long-standing challenge in the synthesis of highly substituted olefins but also exemplifies the principles of green chemistry through catalyst reusability, waste minimization, and efficient multicomponent transformation.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01909"},"PeriodicalIF":3.7,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005698","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

Target-Triggered Self-Assembly of Peptides with Silver Nanoparticles for Electrochemical Biosensing. 银纳米粒子自组装多肽的电化学生物传感研究。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-06 DOI: 10.1002/chem.202502408

Yuying Pan, Yujing Zeng, Jiazhu Pu, Qianxi Zhou, Sha Zhu, Genxi Li

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pH-Responsive Fluorescence Turn-On Copper(II)-Probe for Nitric Oxide Detection: A Reductive Nitrosylation Approach. ph响应荧光开启铜（II）探针用于一氧化氮检测：还原亚硝基化方法。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-06 DOI: 10.1002/chem.202501833

Sanjai Muthusamy, Soumak Mahato, Prabhakar Bhardwaj, Ruppa Durga Rao, Kalai Selvan Karumban, Pankaj Kumar

{"title":"pH-Responsive Fluorescence Turn-On Copper(II)-Probe for Nitric Oxide Detection: A Reductive Nitrosylation Approach.","authors":"Sanjai Muthusamy, Soumak Mahato, Prabhakar Bhardwaj, Ruppa Durga Rao, Kalai Selvan Karumban, Pankaj Kumar","doi":"10.1002/chem.202501833","DOIUrl":"https://doi.org/10.1002/chem.202501833","url":null,"abstract":"Nitric oxide (NO) is one of the crucial biological signaling molecules, yet achieving its selective and spatiotemporal detection in in-situ/invitro or biological systems at specific pH remains a significant challenge. Hence, a probe capable of directly detecting NO would be immensely valuable in understanding its reactivity and biological functions. Here, to develop a Cu(II)-based probe for selective NO detection, we synthesized a Cu(II)-complex (1) using a N3-tridentate ligand having a pendant dansyl fluorophore (L1) and evaluated it's NO reactivity under varying pH conditions. The binding of Cu(II) ion with ligand L1 to prepare 1 showed > 96% fluorescence quenching (fluorescence turn-off) compared to highly fluorescent free L1 (Φ = 59%). Complex 1 did not react with NO in neutral or acidic medium; however, in the presence of onefold base (pH ≥ 9), it showed the reductive nitrosylation reaction, which resulted in the reduction of Cu(II) to Cu(I) and ligand nitrosylation (L1-NO) with fluorescence turn-on. Studies performed using different reactive nitrogen /or oxygen species (RNS/ROS) suggest that probe 1 is highly selective toward NO with a detection limit of 1 nM. For the first time, the base-catalyzed reductive nitrosylation of a Cu(II) complex resulted in the selective NO detection via fluorescence turn-on at pH ≥ 9 in methanol /or aqueous buffer medium. To understand the effect of secondary amine (─NH─) sites in the above reductive nitrosylation reaction, a Cu(II) complex (2) of the ligand (L2), having two different (─NH sites, was reacted with NO under various pH conditions. Surprisingly, 2 showed selective mono-N-nitrosylation of the amine site coordinated to Cu(II) ion with the reduction of Cu(II) in the presence of onefold OH-.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01833"},"PeriodicalIF":3.7,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005649","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

Thermochromic Hydrogel Smart Window for Iron-Chromium Flow Batteries: Dual Band Modulation and Efficient Energy Storage. 用于铁铬液流电池的热致变色水凝胶智能窗口：双波段调制和高效储能。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-06 DOI: 10.1002/chem.202501867

Xi Zeng, Kairan Chen, RuiChen Zhou, Mengying Li, Xuan Zhou, Zhuang Wang, Wei Qiu, YinPing Liu, Yang Zhou, Quan Xu

{"title":"Thermochromic Hydrogel Smart Window for Iron-Chromium Flow Batteries: Dual Band Modulation and Efficient Energy Storage.","authors":"Xi Zeng, Kairan Chen, RuiChen Zhou, Mengying Li, Xuan Zhou, Zhuang Wang, Wei Qiu, YinPing Liu, Yang Zhou, Quan Xu","doi":"10.1002/chem.202501867","DOIUrl":"https://doi.org/10.1002/chem.202501867","url":null,"abstract":"This study introduces the HydroTherm-Flow Smart Window (HTF Window), the first groundbreaking integration of thermochromic windows and Fe-Cr redox flow batteries (Fe-Cr RFBs), achieving dual functionalities of dynamic solar modulation-via dual-band (visible + near-infrared, NIR) modulation-and high-efficiency energy storage in a single component. Leveraging tunable hydroxypropyl cellulose (HPC) hydrogels, it enables ultrafast optical switching and autonomous nighttime opacity, overcoming the slow response and privacy limitations of conventional thermochromic systems. By repurposing the window as a compact electrolyte reservoir, it reduces the RFB spatial footprint while enhancing ionic conductivity by 30% via hydrogel \"ion highways,\" achieving 77% energy efficiency with a 40% reduction in the solar heat gain coefficient. Molecular dynamics simulations reveal interactions between hydrogels and electrolytes, where chloride ion networks and encapsulation structures enhance battery discharge capacity. Addressing intermittent renewable energy grids and global carbon neutrality goals, the HTF Window stores surplus solar/wind energy to balance building-grid demand, reduces annual heating, ventilation, and air conditioning (HVAC) energy consumption by 25% across climates, and stabilizes electrolyte temperature via waste heat recovery to minimize thermal loads. With a projected 20 + year lifespan, it offers a scalable, universal solution for net-zero buildings, bridging sustainable infrastructure and global decarbonization imperatives.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01867"},"PeriodicalIF":3.7,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005680","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

4-Dimethylamino-1,8-Naphthalimide as a Fluorescence Signal Amplification for Site Selective and in Situ Probing of the Hydroxyl Radical. 4-二甲氨基-1,8-萘酰亚胺作为荧光信号扩增用于羟基自由基的选择性和原位探测。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-03 DOI: 10.1002/chem.202502598

Yelisetty Venkata Suseela, Sabyasachi Mandal, Denis Jacquemin, Thimmaiah Govindaraju, Peter Faller

{"title":"4-Dimethylamino-1,8-Naphthalimide as a Fluorescence Signal Amplification for Site Selective and in Situ Probing of the Hydroxyl Radical.","authors":"Yelisetty Venkata Suseela, Sabyasachi Mandal, Denis Jacquemin, Thimmaiah Govindaraju, Peter Faller","doi":"10.1002/chem.202502598","DOIUrl":"10.1002/chem.202502598","url":null,"abstract":"Overproduction of reactive oxygen species (ROS) is involved in several diseases. Copper can be an efficient catalysts for ROS generation, as it was suggested for Cu bound to aberrant sites. Determination of rates and type of ROS production in more complex biological media is challenging and often only down-stream events can be monitored. Here, a selective detection of the hydroxyl radical (HO•), by a demethylation of 4-dimethylamino-1,8-naphthalimide (NMI) fluorescence probe by HO• resulting in ∼25-fold increase in quantum yield is reported. To investigate potential applications, the NMI was coupled to the Cu-binding domain of amyloid-beta (Aβ16). This allowed the in situ fluorescence detection of HO• produced by Aβ16 bound Cu due to the Fenton-type reaction. In a more complex medium with scavengers present including in cell culture conditions, the HO• produced in the bulk was not detected, in line with the short life-time of HO• in the presence of other molecules. Thus, this is a proof of concept to show that NMI reaction-based HO• detection could be a useful and a versatile tool to investigate in situ the role of HO• in a defined location such as Cu bound to Aβ16 in biologically relevant complex systems.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02598"},"PeriodicalIF":3.7,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144937148","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

Ester-Aroyl-S,N-Ketene Acetals with Solid-State Luminescence: AIEgens from Sequential Three-Component Desymmetrization. 固态发光的酯-芳基- s， n -烯酮缩醛：顺序三组分脱对称的成因。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-03 DOI: 10.1002/chem.202502071

Yannic Hartmann, Abdelouahad El Abbassi, Bernhard Mayer, Ute Resch-Genger, Thomas J J Müller

{"title":"Ester-Aroyl-S,N-Ketene Acetals with Solid-State Luminescence: AIEgens from Sequential Three-Component Desymmetrization.","authors":"Yannic Hartmann, Abdelouahad El Abbassi, Bernhard Mayer, Ute Resch-Genger, Thomas J J Müller","doi":"10.1002/chem.202502071","DOIUrl":"https://doi.org/10.1002/chem.202502071","url":null,"abstract":"Di(hetero)aroyl dichlorides are desymmetrized upon sequential reaction with alcohols and 2-methyl N-benzyl thiazolium salts within the course of a one-pot three-component reaction yielding ester-substituted aroyl-S,N-ketene acetals under mild conditions in good yields. A prerequisite for the concise one-pot process is the different nucleophilicity of the alcohols and in situ generated S,N-ketene acetals. The resulting compounds are merocyanines with dominant charge-transfer absorption bands which are fluorescent in the solid state, but not in solution. In water/ethanol solvent mixtures of increasing water content, the water-insoluble dyes display typical aggregation-induced emission (AIE) characteristics. The water fraction inducing AIE as well as the emission color, and fluorescence quantum yield (Φf) of the aggregated dyes can be controlled by the alcohol part of the ester moiety. Encapsulation into polystyrene nanoparticles can lead to a considerable increase of the fluorescence quantum yield Φf to 30% as shown for a representatively chosen dye revealing the highest Φf of 11% within the dye series in the water/ethanol mixtures and enabling the usage of these dyes as fluorescent reporters in aqueous environments.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02071"},"PeriodicalIF":3.7,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990888","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

Redox-Assisted Controlled Radical Polymerization of Acrylates by Strategically Designed Ru^II-Fe^II Heterobimetallic Conjugate. 战略性设计的rui - feii杂双金属偶联物在氧化还原辅助控制自由基聚合丙烯酸酯中的应用。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-02 DOI: 10.1002/chem.202501951

Suman Dolai, Soumyajit Karmakar, Souvik Kundu, Sabyashachi Mishra, Sanjib K Patra

{"title":"Redox-Assisted Controlled Radical Polymerization of Acrylates by Strategically Designed RuII-FeII Heterobimetallic Conjugate.","authors":"Suman Dolai, Soumyajit Karmakar, Souvik Kundu, Sabyashachi Mishra, Sanjib K Patra","doi":"10.1002/chem.202501951","DOIUrl":"https://doi.org/10.1002/chem.202501951","url":null,"abstract":"Employing heterobimetallic complexes (HBCs) offers an exciting and powerful strategy for various catalytic applications. Here, we present an unorthodox synthetic route to synthesize a novel RuII-FeII heterobimetallic complex by implementing the strategy of \"metalation with functionalization.\" This complex utilizes a redox-assisted concerted strategy to facilitate the controlled radical polymerization (CRP) of acrylate monomers with significantly low catalyst loading. To understand the efficiency of the bimetallic catalyst over the other corresponding monometallic complexes, controlled polymerization experiments on acrylate monomers have been carried out. The redox cooperativity for efficient living CRP is very much pronounced and established in the RuII-FeII heterobimetallic dyad as evidenced by multiple orthogonal experimental results and the interesting rearrangement in the frontier molecular orbitals during catalysis steps. A plausible mechanistic pathway is proposed based on insights from electroparamagnetic resonance spectroscopy, cyclic voltametry, UV-Vis spectroscopy, rigid potential energy scans (PES), and the Fukui function. A modified atom transfer radical polymerization (ATRP) mechanism is offered by RuII-FeII conjugate, where redox-cooperativity and intramolecular electron transfer (IET) between the metal centers play a crucial role. This study investigates the potential of redox cooperativity in heterobimetallic systems, highlighting their efficacy as adaptable catalytic platforms.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01951"},"PeriodicalIF":3.7,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144937057","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

Expanding Chemistry of Expanded Helicenes. 膨胀螺旋烯的膨胀化学。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-02 DOI: 10.1002/chem.202502193

Shinji Toyota

{"title":"Expanding Chemistry of Expanded Helicenes.","authors":"Shinji Toyota","doi":"10.1002/chem.202502193","DOIUrl":"https://doi.org/10.1002/chem.202502193","url":null,"abstract":"Expanded helicenes are interesting compounds created by modifying the original helicene structure through the incorporation of linearly fused benzene rings, enlarging the helical diameter. Motivated by Tilley et al.'s report of a key expanded helicene structure in 2017, several research groups have synthesized such nonplanar aromatic compounds, aiming to explore their impressive structures, properties, and chiroptical performance. This review highlights recent advances in the expanded helicene chemistry through experimental and theoretical studies. The shape and length of helical structures depend on the number and combination of angularly and linearly fused benzene rings. Helical structures are classified using notations, and specific compounds corresponding to each structural form, namely, hexagonal, triangular, rhombic, or others, are introduced herein. As an extension of the molecular design, examples of nonhexagonal and heteroaromatic ring-embedded expanded helicenes are presented. Specifically, this review focuses on how the diameters, lengths, and turn numbers of helical structures depend on dynamic processes involving helical inversion and chiroptical properties (circular dichroism (CD) and circularly polarized luminescence (CPL)). The characteristics and perspectives of this molecular design are also discussed.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02193"},"PeriodicalIF":3.7,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144937086","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

Reduction of Nitrite at a Copper(II) Trans-κ¹-ONO Complex via Proton-Coupled Electron Transfer and Oxygen Atom Transfer. 通过质子耦合电子转移和氧原子转移还原铜（II）反式-κ1-ONO配合物上的亚硝酸盐。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-02 DOI: 10.1002/chem.202502362

Donghyun Jeong, Jihui Yoo, Jaeheung Cho

{"title":"Reduction of Nitrite at a Copper(II) Trans-κ1-ONO Complex via Proton-Coupled Electron Transfer and Oxygen Atom Transfer.","authors":"Donghyun Jeong, Jihui Yoo, Jaeheung Cho","doi":"10.1002/chem.202502362","DOIUrl":"https://doi.org/10.1002/chem.202502362","url":null,"abstract":"Reduction of nitrite (NO2 -) to nitric oxide (NO) serves important roles in NO-dependent signaling as well as in the broad nitrogen biogeochemical cycle. In biological system, copper-containing nitrite reductases (CuNiRs) are well known to bind a nitrite anion to mediate the nitrite reduction to release NO, of which the mechanism still requires further understanding. Herein, synthetic copper(II) nitrite complex with a rare binding mode, [CuII(iPr3-tren)(trans-κ1-ONO)]+ (2), is characterized physicochemically and examined in proton-coupled electron transfer (PCET) and oxygen atom transfer (OAT) to release NO. For the first time to gain mechanistic insights into the trans-κ1-O binding copper(II) nitrite complex, detailed kinetic studies in company with theoretical calculations have been performed for oxidation of triphenylphosphine (PPh3), which shows that isomerization of trans-κ1-O to κ1-N binding mode is necessary to exert electrophilic OAT. The better reactivity of κ1-N binding mode is attributed to a fine orbital mixing of Cu-dz2 with highest occupied molecular orbital (HOMO) of NO2 -, thereby imposing much larger electron density on NO2 - moiety. Thus, it is suggested that the reactivity of the copper(II) nitrite complex is conjunctly related to the binding mode of nitrite.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02362"},"PeriodicalIF":3.7,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144937045","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