Dalton Transactions最新文献_第4页

Rational Design and Synthesis of a Novel Ternary Metal–Organic Framework with (3,5)-Connected Topology for Iodine Capture 一种具有（3,5）连接拓扑结构的新型三元金属-有机骨架的合理设计与合成

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-26 DOI: 10.1039/d5dt01722j

Jingjing Yuan, Honghui Lei, Fahui Song, Binbin Tu

{"title":"Rational Design and Synthesis of a Novel Ternary Metal–Organic Framework with (3,5)-Connected Topology for Iodine Capture","authors":"Jingjing Yuan, Honghui Lei, Fahui Song, Binbin Tu","doi":"10.1039/d5dt01722j","DOIUrl":"https://doi.org/10.1039/d5dt01722j","url":null,"abstract":"The discovery of metal–organic frameworks (MOFs) with novel structures opens significant opportunities to improve their performance in gas storage, separation, and catalysis. Rational design of building blocks plays a pivotal role in the construction of new MOF architectures. In this work, we demonstrate that temperature control is an effective strategy for directing the formation of geometrically distinct secondary building units (SBUs), thereby enabling the synthesis of a novel framework. Specifically, lowering the reaction temperature from 105 °C to 75 °C promotes the formation of Zn2 SBUs over the thermodynamically favored Zn4O SBUs, resulting in the assembly of a new (3,5)-connected framework, CCNUF-7, instead of the previously reported ternary (3,6)-connected SC-MOF-2. Due to the rare trigonal bipyramidal geometry of the Zn2 SBUs, CCNUF-7 adopts an unprecedented topological net featuring zigzag hexagonal channels with a diameter of ∼18.5 Å. Furthermore, CCNUF-7 exhibits a high iodine uptake capacity of 2.89 g g-1, attributed to its high porosity and abundant binding sites. This work highlights the potential of temperature-controlled SBU engineering as a powerful approach for constructing MOFs with unprecedented topologies.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"63 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Sodium phosphaethynolate as P-source for the synthesis of molecular rhodium phosphides: an exploratory study 磷酸乙酯钠作为磷源合成分子磷化铑的探索性研究

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-26 DOI: 10.1039/d5dt02274f

Jaap E Borger, Fabian Müller, Peter Coburger, Hansjörg Grützmacher, Zhongshu Li, Thomas L. Gianetti, Bruno Pribanic

引用次数: 0

Electrocatalytic water oxidation by an unsymmetrical dicopper complex with bridging imidazole-aldoxime ligands in neutral phosphate buffer 中性磷酸盐缓冲液中咪唑-醛肟配体的不对称双铜络合物电催化水氧化

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-26 DOI: 10.1039/d5dt00962f

Swati Basak, Pranjal Das, Hemrupa Kuilya, Kripangkar Choudhury, Pradyumna Mazumdar, Diganta Choudhury, Apurba Kalita

引用次数: 0

Trinuclear gold chains and octanuclear copper gyrobifastigia stabilized using a fluorinated pyridyl ligand 使用氟化吡啶配体稳定三核金链和八核铜旋陀螺

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-26 DOI: 10.1039/d5dt02150b

Vo Quang Huy Phan, Mukundam Vanga, Benjamin T Diroll, Alvaro Muñoz-Castro, Rasika Dias

引用次数: 0

High photoluminescence quantum yield modulation of zerodimensional organic-inorganic Mn(II) metal halides by substituent modification 取代基修饰零维有机-无机金属卤化物的高光致发光量子产率调制

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-26 DOI: 10.1039/d5dt01992c

Qing-Ling Cao, Wen-He Zhong, Jie-Yu Zhu, Cai-Hong Shi, Jia-Jia Zhao, Lizhuang Chen

{"title":"High photoluminescence quantum yield modulation of zerodimensional organic-inorganic Mn(II) metal halides by substituent modification","authors":"Qing-Ling Cao, Wen-He Zhong, Jie-Yu Zhu, Cai-Hong Shi, Jia-Jia Zhao, Lizhuang Chen","doi":"10.1039/d5dt01992c","DOIUrl":"https://doi.org/10.1039/d5dt01992c","url":null,"abstract":"Organic-inorganic hybrid metal halides have emerged as promising luminescent materials owing to their structural tunability and exceptional photoluminescence modulation capabilities, showing great potential in optoelectronic applications. Herein, we report the successful design of a novel series of zero-dimension (0D) Mn(II)-based organic-inorganic hybrid halides with enhanced photoluminescence quantum yields (PLQYs) through strategic organic cation engineering. Specifically, in this paper, the methyl group (-CH 3 ) at the fourth position of the benzene ring in the organic cation was replaced with hydrogen (-H) and cyano group (-CN). The average distance of Mn•••Mn was successfully adjusted from 8.925 Å to 8.970 Å and 8.986 Å, and the PLQY was modulated from 35.74% to 59.04% and 81.38%. This work establishes a new paradigm for rationally designing high-performance luminescent materials through molecular-level structural engineering, providing valuable insights for developing advanced optoelectronic devices in sensing, information encryption, and radiation detection applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"72 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Ce-modified HY zeolite promotes polyethylene terephthalate hydrolysis and hydrogenation ce改性HY分子筛促进聚对苯二甲酸乙二醇酯水解和加氢

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-25 DOI: 10.1039/d5dt01089f

Lu Sun, Xueting Wu, Yizhu Fang, Qing Xie, Jing Xu, Xiao Wang, Shuyan Song, Hongjie Zhang

引用次数: 0

Two sites, two stories: sequence-driven divergence in Cu(II) and Zn(II) binding to CusF 两个位点，两个故事：Cu（II）和Zn（II）与CusF结合的序列驱动发散

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-25 DOI: 10.1039/d5dt01770j

Michal Pakowski, Aleksandra Hecel

{"title":"Two sites, two stories: sequence-driven divergence in Cu(II) and Zn(II) binding to CusF","authors":"Michal Pakowski, Aleksandra Hecel","doi":"10.1039/d5dt01770j","DOIUrl":"https://doi.org/10.1039/d5dt01770j","url":null,"abstract":"Copper homeostasis is a fine balance for bacteria: essential for respiration, yet toxic in excess. While the CusCFBA efflux system exports Cu(I) from Gram-negative cells, little is known about how its periplasmic chaperone, CusF, might respond to Cu(II) under oxidative stress. This study explored whether CusF’s coordination environment is more adaptable than previously assumed, and how histidine spacing influences metal selectivity. We examined two peptides that mimic CusF metal-binding domains: a rare –HHH- motif (Ac-22ANEHHHETMSE32-NH2) and a His/Met-rich binding site (Ac-55TIHHDPIAAVNWPEMTMRFTITPQTKMSE83-NH2). Potentiometry, UV–Vis and CD spectroscopy, ESI-MS, and steady-state fluorescence were used to characterize their Cu(II) and Zn(II) complexes. At physiological pH, both peptides form Cu(II) species with a [1Nim, 2N-] donor set. The -HHH- motif peptide stabilizes these complexes more effectively, likely due to earlier amide engagement enabled by its compact histidine triad. Zn(II) binds to the -HHH- motif peptide through three imidazole donors, whereas the His/Met-rich metal binding site shows higher overall Zn(II) affinity despite involving only two imidazoles. Fluorescence reveals metal-induced perturbations near tryptophan in the Ac-55TIHHDPIAAVNWPEMTMRFTITPQTKMSE83-NH₂, with Cu(II) causing stronger quenching and a larger red-shift than Zn(II). Comparison with a calcitermin-derived HxHxH peptide indicates that compact histidine -HHH- clustering better stabilizes Cu(II), whereas spaced histidines favor Zn(II), underscoring how sequence architecture governs metal selectivity.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"12 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145133469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Synthesis and Investigation of Cu@Few-Layer Graphene Shell Composites with Exceptional Conductivity and Chemical Stability 具有优异导电性和化学稳定性的Cu@Few-Layer石墨烯壳复合材料的合成与研究

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-25 DOI: 10.1039/d5dt01293g

Yuan Xu, Jiaxin Liu, Yi Wang, Jianhong Liu, Qianling Zhang

引用次数: 0

A straightforward approach to robust thiazolylidene gold complexes: Efficient catalysts for propargylamide cycloisomerizations 稳健性噻唑聚醚金配合物的直接方法：丙酰胺环异构化的有效催化剂

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-25 DOI: 10.1039/d5dt02258d

Savvas Chalkidis, Nikolaos Tsoureas, Steven P Nolan, Georgios C Vougioukalakis

引用次数: 0

SMM behaviour in a {CoIII4CoII2DyIII2} complex: Co(II)-based thermal barrier and Dy(III) spectator role {CoIII4CoII2DyIII2}配合物中的SMM行为：Co（II）基热障和Dy（III）的旁观作用

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-25 DOI: 10.1039/d5dt01689d

Lara Martinez, David Hunger, Carlos Cruz, Joris van Slageren, Verónica Paredes-García, Pablo Alborés

{"title":"SMM behaviour in a {CoIII4CoII2DyIII2} complex: Co(II)-based thermal barrier and Dy(III) spectator role","authors":"Lara Martinez, David Hunger, Carlos Cruz, Joris van Slageren, Verónica Paredes-García, Pablo Alborés","doi":"10.1039/d5dt01689d","DOIUrl":"https://doi.org/10.1039/d5dt01689d","url":null,"abstract":"We report the synthesis, structure, and magnetic properties of a novel Co/Dy heterometallic complex, [CoIII4CoII2DyIII2(tea)4(CH3COO)4(OH)2(NO3)4]·2H2O (1), the first structurally characterized example of a mixed-valent {CoIII4CoII2DyIII2} motif. It comprises two butterfly-like {CoIII2CoIIDyIII} units linked by carboxylate and alkoxide bridges. X-ray diffraction shows unique Dy(III) and Co(II) sites, with Dy(III) nine-coordinated and Co(II) in a rhombic tetrahedral geometry. Magnetic data and quantum chemical calculations reveal weak Co(II)–Co(II) antiferromagnetic exchange, negligible Co(II)–Dy(III) interactions, and moderate Co(II) zero-field splitting (D ≈ 12–20 cm−1), which drives single-molecule magnet behavior below 14 K. AC studies indicate multiple tunneling pathways and an Orbach barrier (Ueff ≈ 65 cm−1) arising from Co(II), while Dy(III) ions remain largely magnetically decoupled.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"57 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145133886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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