Chemistry - A European Journal最新文献_第8页

Concentration-Driven Reversible Morphological Transitions by the Self-Assembly of Crystalline-Coil Polyphosphazene-b-Polystyrene (PP-b-PS) Block Copolymers.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202500793

Luis Quirós-Montes, David Presa-Soto, Raquel de la Campa, Gabino A Carriedo, Alejandro Presa Soto

{"title":"Concentration-Driven Reversible Morphological Transitions by the Self-Assembly of Crystalline-Coil Polyphosphazene-b-Polystyrene (PP-b-PS) Block Copolymers.","authors":"Luis Quirós-Montes, David Presa-Soto, Raquel de la Campa, Gabino A Carriedo, Alejandro Presa Soto","doi":"10.1002/chem.202500793","DOIUrl":"https://doi.org/10.1002/chem.202500793","url":null,"abstract":"In this study, we demonstrate that varying the initial concentration of the poly-[bis(trifluoroethoxy)phosphazene]-bpoly(styrene) (PTFEP55-b-PS50) block copolymer enables the formation of diverse, well-defined nanomorphologies through selfassembly in tetrahydrofuran. By adjusting the copolymer concentration, spherical micelles (0.1 mg/mL), bicontinuous micelles (0.33 mg/mL), toroidal micelles (2.0 mg/mL), cylindrical micelles (10 mg/mL), and vesicles (50 mg/mL) were successfully prepared. This methodology, using a single solvent and no additives, allowed for the investigation of morphological transformation mechanisms. Intermediate structures, such as \"flower-like\" morphologies (0.66 mg/mL), large compound micelles (LCMs. 1.0 mg/mL), and perforated micelles (1.5 mg/mL), were identified, revealing transitions between bicontinuous and toroidal morphologies. In situ studies captured the opening of toroidal structures into cylindrical micelles, while \"octopodlike\" structures were observed at intermediate concentrations between cylindrical and vesicular architectures. Wide-angle X-ray diffraction (WAXD) analysis showed that PTFEP blocks in the nanostructure cores are amorphous at low concentrations (<2 mg/mL) but exhibit increasing crystallinity at higher concentrations (>2 mg/mL), transitioning from toroids to cylinder and vesicles. This work highlights the ability to control the self-assembly of PTFEPb-PS, generating a wide range of nanomorphologies by modulating PTFEP crystallinity through concentration adjustments. The unprecedented structural diversity of this system underscores its potential for designing advanced nanostructured materials.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500793"},"PeriodicalIF":3.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690567","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

The Dinuclear Zirconocene Complex [(Cp2Zr)2(µ-Me)(µ-C2Ph)] as a Platform for Small Molecule Activation.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202500857

Hanan Al Hamwi, Mirko Rippke, Kevin Lindenau, Anke Spannenberg, Martin Lamac, Fabian Reiß, Torsten Beweries

{"title":"The Dinuclear Zirconocene Complex [(Cp2Zr)2(µ-Me)(µ-C2Ph)] as a Platform for Small Molecule Activation.","authors":"Hanan Al Hamwi, Mirko Rippke, Kevin Lindenau, Anke Spannenberg, Martin Lamac, Fabian Reiß, Torsten Beweries","doi":"10.1002/chem.202500857","DOIUrl":"https://doi.org/10.1002/chem.202500857","url":null,"abstract":"The dinuclear title compound [(Cp2Zr)2(µ-Me)(µ-C2Ph)] 5 was prepared from a zirconocene alkynyl methyl complex and Rosenthal's zirconocene source [Cp2Zr(py)(h2-Me3SiC2SiMe3)] in a formal comproportionation reaction. This complex shows catalytic activity for the dehydrocoupling of amine boranes, with a dinuclear hydride-bridged alkynyl complex 6 being formed as a catalytically relevant species. The structure of this complex was confirmed for the first time by single-crystal X-ray analysis. Reaction of complex 5 with hydrogen results in hydrogenation of the alkynyl ligand, yielding a highly labile trinuclear hydride-bridged complex as a possible intermediate of zirconocene dihydride/ethyl benzene formation. This complex shows an unusual distorted planar tetracoordinate environment at the central carbon atom positioned between the three Zr centres. The reaction of complex 5 with 2-cyanopyridine and acetonitrile is characterised by a reduction of the substrates. The herein reported reactivity of complex 5 demonstrates the remarkable potential of well-established zirconocenes to stabilise unusual bond situations, which were analysed comprehensively using spectroscopic, structural, and computational methods.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500857"},"PeriodicalIF":3.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690592","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

Enhancing Photocatalytic and Antibacterial Properties through a Synergistic Approach in ZnS-CuSe Nanocomposites.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202404050

Syed Awais Ahmad, Rui Bao, Muhammad Arif, Muhammad Awais, Yingkai Liu, Hongen Wang, Weibin Zhang

{"title":"Enhancing Photocatalytic and Antibacterial Properties through a Synergistic Approach in ZnS-CuSe Nanocomposites.","authors":"Syed Awais Ahmad, Rui Bao, Muhammad Arif, Muhammad Awais, Yingkai Liu, Hongen Wang, Weibin Zhang","doi":"10.1002/chem.202404050","DOIUrl":"https://doi.org/10.1002/chem.202404050","url":null,"abstract":"This study introduces a novel single-step sonochemical synthesis method for producing pure ZnS and CuSe. Moreover, it offers a comprehensive first-time report on the fabrication of ZnS-CuSe nanocomposites with varying compositions via using a wet-chemical method. Comprehensive characterization was conducted to assess the material's phase purity, structure integrity, composition, detection of free radicals, and optical properties. The results revealed that the average crystallite sizes of ZnS and CuSe were determined to be 46.91 and 20.31 nm, respectively. Morphological analysis showed that CuSe formed nanoflakes structure, whereas ZnS was observed as nanoparticles. The optical properties revealed a red shift in the absorption spectra and a corresponding decrease in the band gap with varying CuSe concentration. The electrons in the CBM (conduction band minimum) can be directly captured by •O2 to produce large amounts of •O2- and •OH radicals, which are formed via the route of •O2- →H2O2 →•OH. Further insights from DFT calculations agree with these findings and offer a deeper understanding of how CuSe affects the electronic structure of ZnS materials. Moreover, among the materials, the CZ-3 nanocomposite showed superior photocatalytic activity, achieving 98% degradationof methylene blue(MB) dyeand effective inhibition of B. subtilis and P. aeruginosa under visible light irradiation.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202404050"},"PeriodicalIF":3.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690571","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

Modulation of Optical and Electrochemical Properties of Cu(I) Alkynyl Clusters by Carboxylic Acid Ligands.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202500230

Zheng Liu, Jun-Jie Fang, Zhi-Yi Wang, Yun-Peng Xie, Xing Lu

引用次数: 0

Anion-Deficient Transition Metal Oxynitrides as Anode Materials for Solid Oxide Fuel Cells.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202500503

Shi-Rui Zhang, Xiaoming Wang, Wen Li, Lei-Ming Fang, Tian-Hui Liu, Zu-Pei Yang, Xiao-Jun Kuang, Huan Jiao

引用次数: 0

Self-Organization of Carbohydrate-Derived Amphiphilic Compounds: Insights into Their Supramolecular Assembly.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202404758

Miguel A Tovar, R Darío Falcone, N Mariano Correa, Marcelo Ceolin, Pablo H Di Chenna, Maria Laura Uhrig

{"title":"Self-Organization of Carbohydrate-Derived Amphiphilic Compounds: Insights into Their Supramolecular Assembly.","authors":"Miguel A Tovar, R Darío Falcone, N Mariano Correa, Marcelo Ceolin, Pablo H Di Chenna, Maria Laura Uhrig","doi":"10.1002/chem.202404758","DOIUrl":"https://doi.org/10.1002/chem.202404758","url":null,"abstract":"We describe the synthesis and self-assembly properties of two sugar-derived surfactants constructed by click reaction from readily accessible building blocks. After structural characterization, their self-assembly processes were studied in two biocompatible solvents, isopropyl myristate (IPM) and methyl laurate (ML), as well as in toluene. Detailed experiments by Dynamic Light Scattering (DLS) and Small-Angle X-ray Scattering (SAXS) confirmed the formation of reverse micelles (RMs). Our findings reveal the formation of spherical aggregates with low polydispersity indices, indicating a high degree of size uniformity. SAXS analysis further demonstrated that these aggregates possess a smooth and well-defined RMs-nonpolar solvent interface. Notably, the system in toluene as the non-polar phase exhibited a unique behavior, suggesting distinct structural characteristics that differ from those observed in the biocompatible solvents. A low-resolution structural model revealed that the aggregates contain an internal gap compatible with a reverse vesicle consisting of a bilayer of amphiphile with the hydrophilic heads pointing towards the interior and the exterior of the bilayer with toluene on both sides of the bilayer. In summary, this study explores the self-assembly characteristics of sugar-based surfactants in non-polar environments that mimic biological membranes. Our findings highlight the significant potential of these surfactants in supramolecular chemistry and glycobiology.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202404758"},"PeriodicalIF":3.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699250","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 Robust Strategy for Introducing Amino-Modifiers in Nucleic Acids: Enabling Novel Amino Tandem Oligonucleotide Synthesis in DNA and RNA.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202500448

Jagandeep S Saraya, Nicholas G Horton, Scott R Sammons, Derek K O'Flaherty

{"title":"A Robust Strategy for Introducing Amino-Modifiers in Nucleic Acids: Enabling Novel Amino Tandem Oligonucleotide Synthesis in DNA and RNA.","authors":"Jagandeep S Saraya, Nicholas G Horton, Scott R Sammons, Derek K O'Flaherty","doi":"10.1002/chem.202500448","DOIUrl":"https://doi.org/10.1002/chem.202500448","url":null,"abstract":"Amino-modifiers are pivotal chemical modifications in nucleic acid scaffolds, serving applications ranging from (bio)conjugation to probing the origins of life. We report a simple, efficient, and cost-effective methodology for the introduction of amino-modifiers into DNA and RNA. This approach leverages a commercially available sulfonyl-containing solid support, which is first converted into a mixed N-hydroxysuccinimide carbonate, enabling robust conjugation with primary and secondary amines whether nucleosidic or non-nucleosidic. Oligonucleotides are synthesized via solid-phase synthesis and purified using standard methods, with little to no modification. Building on this framework, we introduce a novel amino-containing tandem oligonucleotide synthesis (aTOS) methodology, which facilitates the introduction of multiple terminal amino (or monophosphate) groups across two oligonucleotide strands. This innovative method broadens the toolkit for the introduction of amino modifications in nucleic acids, for applications in nucleic acid (bio)chemistry and biotechnology.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e202500448"},"PeriodicalIF":3.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699149","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

Tripodal Heptazine Core-based C3-Symmetric Multi-azo(hetero)arenes: Photoswitching, Supramolecular Sol-gel Behavior, and Base Sensing Prospects.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-24 DOI: 10.1002/chem.202404757

Himanshu Kumar, Pravesh Kumar, Amit Kumar, Anjali Mahadevan, Kirti Dhingra, Kamalakannan Kailasam, Sugumar Venkataramani

引用次数: 0

Contrasting reactions of carbodiimides with divalent lanthanoid species.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-23 DOI: 10.1002/chem.202500759

Vidushi Vithana, Zhifang Guo, Glen Deacon, Peter Courtney Junk

引用次数: 0

Silver-Catalyzed Halochalcogenation of Terminal Alkynols to Access Halogenated Selenonaphthalenes.

IF 3.9 2区化学

Chemistry - A European Journal Pub Date : 2025-03-22 DOI: 10.1002/chem.202500683

Huanliang Hong, Li Wang, Sijie Xie, Yibiao Li

引用次数: 0