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

Ruthenium-Promoted Acceptor-less Dehydrogenation of a Germane. 钌促进日耳曼的无受体脱氢。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-19 DOI: 10.1002/chem.202501831

Aidan F Carr-Davis, Aswin Chandran, Theo F N Tanner, Adrian C Whitwood, Mary Grellier, Jason M Lynam, John M Slattery

{"title":"Ruthenium-Promoted Acceptor-less Dehydrogenation of a Germane.","authors":"Aidan F Carr-Davis, Aswin Chandran, Theo F N Tanner, Adrian C Whitwood, Mary Grellier, Jason M Lynam, John M Slattery","doi":"10.1002/chem.202501831","DOIUrl":"https://doi.org/10.1002/chem.202501831","url":null,"abstract":"The transition metal-mediated activation of element-hydrogen bonds is an important goal for the preparation of commodity chemical compounds and novel materials. Here a facile route to the activation of germanium-hydrogen bonds, based on the spontaneous elimination of dihydrogen, is reported. This represents a mechanistic divergence from the established methods for Ge─H bond cleavage. The novel complexes [Ru(η5-C5H5)(OTf)(PPh3)2] and [{Ru(η5-C5H5)(dppe)}2(μ-N2)]OTf2 are central to the success of this route. These crystalline species may be prepared in high yield and are highly effective sources of the 16-electron [Ru(η5-C5H5)(P)2]+ fragment. Both complexes react with GeH2Ph2 to eliminate H2 and afford [Ru(η5-C5H5)(GePh2OTf)(P)2] [(P)2 = 2 PPh3, dppe], which is best described as a triflate-stabilized metallogermylenium complex. Different species are observed on initial treatment of [Ru(η5-C5H5)(OTf)(PPh3)2] or [{Ru(η5-C5H5)(dppe)}2(μ-N2)]OTf2 with GeH2Ph2. In the dppe case, a σ-germane complex is identified, which is proposed to undergo spontaneous elimination of H2: a key step in the double Ge─H bond activation, promoted by the sterically demanding half-sandwich ruthenium complexes. This represents a distinct pathway for Ge─H bond activation when compared to the established routes, such as deprotonation by a basic hydrocarbyl ligand or oxidative addition, leading the way to new pathways to functionalize organogermanium compounds.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01831"},"PeriodicalIF":3.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145090707","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

pH-Dependent Luminescence of Self-Assembly Tb³⁺ Complexes with Photosensitizing Units. 具有光敏化单元的自组装Tb3+配合物的ph依赖性发光。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-19 DOI: 10.1002/chem.202502378

Eiko Mieda, Tatsuya Watanabe, Ryusei Morita, Hiroyuki Miyake, Satoshi Shinoda

引用次数: 0

Path Selective Photoinduced Energy and Electron Transfer in a Bis(acridinium-Zn(II) Porphyrin)-tetrapyridyl Porphyrin Host-Guest Complex. 双吖啶- zn （II）卟啉-四吡啶基卟啉主客体复合物的路径选择性光诱导能量和电子转移。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-19 DOI: 10.1002/chem.202502604

Federica Ruani, Daniele Veclani, Daniel Sanchez-Resa, Amy Edo-Osagie, Geordie Creste, Andrea Barbieri, Valérie Heitz, Henri-Pierre Jacquot de Rouville, Nicola Armaroli, Barbara Ventura

引用次数: 0

Toward Organic Mimics of Metallic Nanoparticles: Tuning and Enhancing Fluorescence in Binary Dye-Based Nanoparticles. 迈向有机模拟金属纳米粒子：二元染料基纳米粒子的荧光调谐和增强。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-18 DOI: 10.1002/chem.202501698

Eleonore Kurek, Morgane Rosendale, Gaëlle Recher, Jean-Baptiste Verlhac, Sébastien Marais, Jonathan Daniel, Mireille Blanchard-Desce

{"title":"Toward Organic Mimics of Metallic Nanoparticles: Tuning and Enhancing Fluorescence in Binary Dye-Based Nanoparticles.","authors":"Eleonore Kurek, Morgane Rosendale, Gaëlle Recher, Jean-Baptiste Verlhac, Sébastien Marais, Jonathan Daniel, Mireille Blanchard-Desce","doi":"10.1002/chem.202501698","DOIUrl":"https://doi.org/10.1002/chem.202501698","url":null,"abstract":"A key characteristic of binary metallic nanoparticles is the extreme tuneability of their optical properties through small changes in their composition and structure. Organic mimics of such binary metallic nanoparticles with similar properties would be of major interest. Here, we present Binary Fluorescent Organic Nanoparticles (hereafter termed вFONs) made from two structurally similar but optically complementary polar and polarizable dyes (PPDs) (i.e., energy donor D and energy acceptor A) as such potential mimics. We designed dye-based core-shell and alloy вFONs with varying composition (i.e., D versus A content) and investigated their fluorescence properties. In both core-shell and alloy вFONs, the donor dyes efficiently harvest energy-through Förster Resonance Energy Transfer (FRET)-resulting in substantial brightness values (up to 1.3 108 M-1cm-1 per nanoparticle). However, вFONs' luminescence properties were found to strongly depend on their nanostructuration. Core-shell вFONs exhibit a Nano Interfacial Emission Enhancement (NIEE) effect, consisting in a blue-shifted fluorescence and enhanced FRET-mediated fluorescence quantum yield, compared to alloy вFONs of identical composition-but devoid of a core-shell topology. Moreover, we demonstrate for the first time that the extent of this NIEE effect directly depends on вFONs composition, and increases with the D/A ratio. Furthermore, bioimaging in live cells reveals that вFONs retain their binary nature and unique fluorescence properties in cellular environments.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e01698"},"PeriodicalIF":3.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145079135","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

Reactivity of Square Planar Pt(II) Complexes Toward Acidic Moieties as H⁺, M⁺, and [ML]⁺ (M = Ag, Au). 方形平面Pt（II）配合物对酸性基团H+、M+和[ML]+ (M = Ag, Au)的反应性

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-17 DOI: 10.1002/chem.202502370

Laura Martínez-Romera, David Campillo, Daniel Escudero, Miguel Baya, Antonio Martín

{"title":"Reactivity of Square Planar Pt(II) Complexes Toward Acidic Moieties as H+, M+, and [ML]+ (M = Ag, Au).","authors":"Laura Martínez-Romera, David Campillo, Daniel Escudero, Miguel Baya, Antonio Martín","doi":"10.1002/chem.202502370","DOIUrl":"https://doi.org/10.1002/chem.202502370","url":null,"abstract":"The Lewis base (LB) properties of the d8 Pt(II) are manifested in the formation of Pt→E species, where E are electrophiles such as acidic hydrogens or metal cations. Thus, the reactions of [Pt(CNC)(dmso)] (CNC = 2,6-di(phen-2-ide)-pyridine) toward PPh2(C6H4-o-COOH) or PPh2(C6H4-o-OH) produce complexes [Pt(CNC-H){PPh2(C6H4-o-COO)}] (1) and [Pt(CNC-H){PPh2(C6H4-o-O)}] (2). Their X-ray structures confirm the proton transfer from the OH at the phosphane to one of the phenylene rings of the CNC ligand. Then, the deprotonated oxygen occupies the vacant site. It is proposed that the transfer starts with a hydrogen bond (Pt→H) which evolves to the final products favored by the planar nature of the CNC ligand. 1 and 2 react with Ag+ and [M(PPh3)]+ (M = Ag, Au) giving rise to complexes without Pt─M bonds, but O─M or O─Ag─O instead. Their structures reveal that the oxygen atoms present in 1 and 2 advantageously compete with the Pt as the donor entity for the incoming acidic metal. Moreover, dinuclear complexes with O─H···O systems structurally analogous to the O─Ag─O have been prepared and characterized. They reinforce the idea of resemblance of the proton and cations such as Ag+, Au+, [AgL]+, and [AuL]+ as Lewis acidic moieties, which is consistent with the concept of isolobality.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02370"},"PeriodicalIF":3.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145074271","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

Ultrafine Pd Nanoparticles on Triphenylphosphine-Covalent Organic Framework for Dual Photo/Thermal Catalysis of Scalable C-C/C-N Cross-Couplings. 三苯基膦共价有机骨架上的超细钯纳米粒子用于可扩展C-C/C-N交叉偶联的双光/热催化。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-17 DOI: 10.1002/chem.202502122

Shaodong Jiang, Hongyun Niu, Xinkun An, Mingan Wang, Yaqi Cai

{"title":"Ultrafine Pd Nanoparticles on Triphenylphosphine-Covalent Organic Framework for Dual Photo/Thermal Catalysis of Scalable C-C/C-N Cross-Couplings.","authors":"Shaodong Jiang, Hongyun Niu, Xinkun An, Mingan Wang, Yaqi Cai","doi":"10.1002/chem.202502122","DOIUrl":"https://doi.org/10.1002/chem.202502122","url":null,"abstract":"The development of highly active and reusable heterogeneous catalysts for scalable organic synthesis remains a critical challenge. Here, a covalent organic framework (TyPPc-COF) with aldehyde residues was synthesized and post-modified with triphenylphosphine ligands to construct TyPPc-P-COF. Subsequently, ultrafine Pd nanoparticles (2.73 nm) were uniformly anchored onto TyPPc-P-COF via phosphine-Pd coordination. The resultant TyPPc-P@Pd NPs exhibit dual-mode catalytic functionality: In C-C cross-coupling reactions involving aryl iodides, this catalyst demonstrates excellent performance under both thermal catalytic conditions (50 mg catalyst, TOF = 1060 h-1) and photocatalytic conditions (30 mg catalyst, TOF = 1780 h-1), achieving gram-scale yields (>80%). Notably, under both photocatalytic and thermal catalytic conditions, this catalyst also efficiently catalyzes Suzuki-Miyaura, Heck, and Sonogashira C-C coupling reactions involving aryl bromides and aryl chlorides, which typically exhibit lower activity. Furthermore, it has been demonstrated that light irradiation can effectively extend catalytic functionality to C-N bond formation. Stability tests revealed negligible Pd leaching/aggregation after multiple cycles, confirming structural robustness. This work provides a general strategy for designing COF@MNPs merging high activity, recyclability, and environmental compatibility, advancing sustainable organic synthesis.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02122"},"PeriodicalIF":3.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145074185","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 Structurally Unique {Fe(NO)₂}¹⁰-{Fe(NO)₂}⁹ Dinuclear Dinitrosyl Iron Complex Bridged by a μ-ƞ²-FBF₃ ^- Ligand and Stabilized by N-Heterocyclic Carbenes. 一个结构独特的{Fe(NO)2}10-{Fe(NO)2}9双核二硝基铁配合物，以μ-ƞ2-FBF3 -配体桥接，n -杂环卡宾稳定。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-17 DOI: 10.1002/chem.202502404

Yung-Chuan Chuang, Ching-Wen Lin, Yi-Hung Wu, Yu-Hsien Chang, Chung-Hung Hsieh

{"title":"A Structurally Unique {Fe(NO)2}10-{Fe(NO)2}9 Dinuclear Dinitrosyl Iron Complex Bridged by a μ-ƞ2-FBF3 - Ligand and Stabilized by N-Heterocyclic Carbenes.","authors":"Yung-Chuan Chuang, Ching-Wen Lin, Yi-Hung Wu, Yu-Hsien Chang, Chung-Hung Hsieh","doi":"10.1002/chem.202502404","DOIUrl":"https://doi.org/10.1002/chem.202502404","url":null,"abstract":"Reaction of a {Fe(NO)3}10 trinitrosyl iron complex with a mononuclear {Fe(NO)2}10 dinitrosyl iron complex furnishes a dinuclear dinitrosyl iron complex, [(NO)2(IMes)Fe(μ-η2-FBF3)Fe(IMes)(NO)2] (3) (IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene). Single-crystal X-ray diffraction reveals an unprecedented μ-η2-FBF3 - bridge that links two [Fe(NO)2] motifs, giving an Fe….Fe separation of 3.45 Å. Nonclassical C─H…F contacts (3.21 - 3.61 Å) between the mesityl methyl groups of the IMes and the nonbridging fluorine atom cradle the anion and create a pseudo-tridentate environment that stabilizes the mixed-valent core. Infrared spectroscopy exhibits four ν(NO) bands at 1778, 1736, 1715, and 1682 cm-1, inferring the presence of two electronically different {Fe(NO)2} units, whereas 77 K EPR spectroscopy gives a rhombic signal with gavg = 2.109, diagnostic of an s = 1/2 species in complex 3.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02404"},"PeriodicalIF":3.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145074282","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

Carbon Dots as Nano-Photocatalysts: A Green Tool for Indole and Heteroarenes Alkylation. 碳点作为纳米光催化剂：吲哚和杂芳烃烷基化的绿色工具。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-16 DOI: 10.1002/chem.202502043

Jules Sargueil, Marta Santoni, Simone Cichella, Antonio Di Sabato, Vyali Georgian Moldoveanu, Elisa Sturabotti, Beatrice Simonis, Mauro Giustini, Luisa Maria Migneco, Francesca Leonelli, Fabrizio Vetica

{"title":"Carbon Dots as Nano-Photocatalysts: A Green Tool for Indole and Heteroarenes Alkylation.","authors":"Jules Sargueil, Marta Santoni, Simone Cichella, Antonio Di Sabato, Vyali Georgian Moldoveanu, Elisa Sturabotti, Beatrice Simonis, Mauro Giustini, Luisa Maria Migneco, Francesca Leonelli, Fabrizio Vetica","doi":"10.1002/chem.202502043","DOIUrl":"https://doi.org/10.1002/chem.202502043","url":null,"abstract":"Taking into account the hurdles of climate change and environmental pollution, through the years, the development of sustainable protocols in catalysis stands as a cornerstone to answer those issues. Carbon dots (CDs) have recently proven to be efficient in various types of catalysis, including photocatalytic reactions, while being a green and economic alternative for metal catalysts. In this paper, we present a new catalytic system for the photoredox functionalization of indoles and heteroarenes derivatives based on CDs as nano-photocatalysts. This reaction, based on the cooperation between our catalyst and 2,6-lutidine, shows the ability to functionalize these compounds up to 88%, it is effective on 1 mmol scale, and shows a recyclability potential at least to 5 cycles. This system also demonstrated the capacity of obtaining rare types on indoles, having two electron withdrawing groups (EWG), both on the carbon 2 (C2) and carbon 3 (C3). Furthermore, careful studies led to the partial resolution of the mechanism, and to explanations on the regioselectivity of the reaction, which has been studied through the nature of both reagents and substrates, but also through the light's wavelength used in the reaction.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e02043"},"PeriodicalIF":3.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145068703","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

Nickel-Catalyzed P-Arylation of HP(= O)(R/OR)₂ Nucleophiles with (Hetero)Aryl Chlorides Enabled by DalPhos Ligation. 镍催化HP(= O)(R/OR)2亲核试剂与（杂）芳基氯化物的p -芳基化

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-15 DOI: 10.1002/chem.202502189

Michael J Cotnam, T Kieran Redpath, Catherine E Weetman, Patrick L DeRoy, David J Nelson, Mark Stradiotto

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Oxidant-Triggered Bioconjugation Chemistry: Expanding the Landscape of Ligandable Lysine Residues in the Proteome. 氧化触发的生物偶联化学：扩展蛋白质组中可配体赖氨酸残基的景观。

IF 3.7 2区化学

Chemistry - A European Journal Pub Date : 2025-09-15 DOI: 10.1002/chem.202502153

Shengrong Li, Mengya Zhou, Weizhen Huang, Xia Yuan, Wen Jin, Zhengqiu Li

引用次数: 0