Dalton Transactions最新文献_第9页

Redox Transition and Property Modulation in Vanadium Oxide Nanourchins: From V2O5 to long hydrocarbon alkylammonium V7O162-. 氧化钒纳米粒子的氧化还原转变和性质调制：从V2O5到长烃烷基铵V7O162-。

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01489a

Tamara Bruna, Andres Ibañez, Daniel Navas

{"title":"Redox Transition and Property Modulation in Vanadium Oxide Nanourchins: From V2O5 to long hydrocarbon alkylammonium V7O162-.","authors":"Tamara Bruna, Andres Ibañez, Daniel Navas","doi":"10.1039/d5dt01489a","DOIUrl":"https://doi.org/10.1039/d5dt01489a","url":null,"abstract":"Urchin-like vanadium oxide nanostructures (VOₓ–NUs) were synthesized using V⁵⁺ alkoxide precursors [VO(OCH(CH₃)₂)₃] and long-chain primary alkylamines (1 hexadecylamine and 1 octadecylamine) as structure-directing agents. The process involves intercalation-driven sol–gel assembly followed by hydrothermal treatment at 180 °C for seven days in aqueous–ethanolic media. The resulting spherical clusters are composed of densely packed, radially aligned vanadium oxide nanotubes stabilized by mixed-valence V⁴⁺/V⁵⁺ within a V₇O₁₆²⁻ lattice. Despite surface similarities to conventional VOₓ nanotubes, these urchin architectures exhibit distinct structural and electronic behavior due to their curved three-dimensional configuration and dense interfacial organization. Oxidation-state transitions were quantified via X-ray photoelectron spectroscopy (XPS) and volumetric titration, revealing progressive reduction of V⁵⁺ to V⁴⁺ templated by the amines. Magnetic characterization by SQUID magnetometry uncovered unusual room-temperature magnetic behavior, linked to the stabilization of mixed-valence states within the layered lattice. These results demonstrate how controlled intercalation and redox tuning enable the formation of VOₓ–NUs with emergent magnetic properties, expanding their potential in magnetoelectronic, catalytic, and sensing applications. The findings offer a novel framework for engineering multifunctional transition metal oxide nanostructures through oxidation-state modulation and self-assembly.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"69 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059526","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 of Europium based Fluorescent Films for High Sensitivity Detection of Iron Ions via Layered Precursor Anion Exchange 层状前驱阴离子交换用于铁离子高灵敏度检测的铕基荧光膜的合成

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01750e

Lu He, Sen Qin, Haoxuan Zeng, Ziyuan Li, Qiao Liang, Xin Hu, Xiaoli Wu

{"title":"Synthesis of Europium based Fluorescent Films for High Sensitivity Detection of Iron Ions via Layered Precursor Anion Exchange","authors":"Lu He, Sen Qin, Haoxuan Zeng, Ziyuan Li, Qiao Liang, Xin Hu, Xiaoli Wu","doi":"10.1039/d5dt01750e","DOIUrl":"https://doi.org/10.1039/d5dt01750e","url":null,"abstract":"In this study, based on the anion exchange strategy, layered europium hydroxide (LEuH) film was used as a precursor to prepare luminescence films of sodium europium tungstate (NaEu(WO4)2) and sodium europium molybdate (NaEu(MoO4)2). By changing the concentration of anion sources (Na2WO4 and Na2MoO4), the structural evolution, morphological transformation and chemical composition change of the interlayer and host layer during the process were clarified, and the transformation mechanism of LEuH to the ' dissolution-recrystallization ' of tungsten-molybdate film was revealed. It can be seen from the anion source concentration and reaction time that the exchange tendency of WO42- is higher than that of MoO42-. NaEu(WO4)2 and NaEu(MoO4)2 films have stable tetragonal crystal structure and efficient luminescence properties (the fluorescence intensity is 78 times and 109 times that of LEuH, respectively), showing higher comprehensive potential than LEuH in Fe3+ fluorescence detection. Their excellent luminescent properties, Eu3+ characteristic red light emission (~617 nm) and Fe3+ specific fluorescence quenching make them directly used as fluorescent probes to achieve in-situ rapid detection of Fe3+.Among them, the matrix CT band (~250-300 nm) of NaEu(WO4)2 is highly overlapped with the strong absorption region (~250-300 nm) of Fe3+, while the CT band (~300-350 nm) of NaEu(MoO4)2 only overlaps with the weak absorption band (~200-350 nm) of Fe3+. Therefore, the NaEu(WO4)2 film probe exhibits higher sensitivity and lower detection limit (KSV : 2.825 × 104 L/mol, LOD: 4.9 μmol/L), which is significantly better than the NaEu(MoO4)2 film (KSV : 8.84 × 103 L/mol, LOD: 7.3 μmol/L).","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"34 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059303","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

Inkless Rewritable Paper Enabled by a Scalable Photochromic Membrane 可伸缩光致变色膜实现无墨可重写纸

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01957e

Junchao Liu, Chenfang Zhang, Tianyu Huang, Xusheng Guo, Zhenxin Kuang, Rong-Wei Kou, Yu Zhong, Pan Jia, Jingxia Wang

引用次数: 0

NCPA Templated Red Emitting Gold Nanoclusters: Turn-Off-On Fluorescent Probe for Rapid and Selective Detection of Cu2+Ions in Live Cells and Anticancer Activity NCPA模板红色发光金纳米团簇：用于快速和选择性检测活细胞中Cu2+离子和抗癌活性的关闭荧光探针

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01825k

Elumalai Manikandan, Gopinath Nagaraj, Sankar Ganesh Ramaraj, Elangovan Vellaichamy, Hitoshi Tabata, Rajendiran Nagappan

{"title":"NCPA Templated Red Emitting Gold Nanoclusters: Turn-Off-On Fluorescent Probe for Rapid and Selective Detection of Cu2+Ions in Live Cells and Anticancer Activity","authors":"Elumalai Manikandan, Gopinath Nagaraj, Sankar Ganesh Ramaraj, Elangovan Vellaichamy, Hitoshi Tabata, Rajendiran Nagappan","doi":"10.1039/d5dt01825k","DOIUrl":"https://doi.org/10.1039/d5dt01825k","url":null,"abstract":"Red-emitting gold nanoclusters (AuNCs) have gained significant attention as promising fluorescent probes for chemical and biomedical applications due to their excellent optical properties and inherent biocompatibility. In this study, a turn OFF–ON red-emitting AuNC fluorescent probe was synthesized using N-cholyl D-penicillamine (NCPA) as a stabilizing and templating agent above its critical micellar concentration (CMC) under UV light irradiation. The developed synthesis protocol is simple, cost-effective, and produces highly water-soluble AuNCs exhibiting an emission maximum at 664 nm with a large Stokes shift of 294 nm. The average fluorescence lifetime and quantum yield of the AuNCs were determined to be 116.49 ns and 3.26%, respectively. High-resolution transmission electron microscopy (HR-TEM) confirmed the formation of monodispersed nanoclusters with an average core size of 1.94 ± 0.4 nm. The synthesized AuNCs demonstrated excellent selectivity and sensitivity towards copper ions (Cu²⁺), with a detection limit as low as 6.9 nM based on fluorescence quenching. Notably, the quenched fluorescence of the NCPA@AuNCs–Cu²⁺ complex could be effectively restored (~94%) upon the addition of ethylenediaminetetraacetic acid (EDTA), enabling a reversible OFF–ON sensing mechanism. Furthermore, the NCPA@AuNCs exhibited potent cytotoxicity against MCF-7 and HeLa cancer cell lines. In an in vitro cellular environment, the quenched fluorescence of the NCPA@AuNCs–Cu²⁺ complex could also be restored by EDTA treatment, demonstrating the potential of this system for intracellular Cu²⁺ sensing and live-cell imaging. Overall, the developed NCPA-stabilized red-emitting AuNCs offer an efficient, reversible fluorescent sensing platform for Cu²⁺ ions and exhibit significant potential for cancer cell imaging and therapeutic applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"36 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059308","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

In Situ Confinement of CsPbBr 3 Quantum Dots within COF for Enhanced Photocatalytic CO2 Reduction COF内CsPbBr 3量子点的原位约束增强光催化CO2还原

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01826a

Wenjian Lv, Jiacheng Wu, Ren Ma, Zhengqiang Xia, Sanping Chen, Gang Xie

{"title":"In Situ Confinement of CsPbBr 3 Quantum Dots within COF for Enhanced Photocatalytic CO2 Reduction","authors":"Wenjian Lv, Jiacheng Wu, Ren Ma, Zhengqiang Xia, Sanping Chen, Gang Xie","doi":"10.1039/d5dt01826a","DOIUrl":"https://doi.org/10.1039/d5dt01826a","url":null,"abstract":"Confining quantum dots (QDs) within covalent organic frameworks (COFs) has emerged as a promising strategy to address their inherent limitations, particularly the aggregation and environmental instability of perovskite QDs, as well as to enhance charge carrier separation efficiency. In this study, CsPbBr 3 QDs were in situ encapsulated within a TTATFA-COF matrix (TTA = 2,4,6-Tris (4-aminophenyl) triazine, TFA = tris (4-formylphenyl) amine), effectively preventing aggregation and environmental degradation, thereby significantly improving their structural and functional stability. The intimate interfacial contact promotes type-II charge transfer, facilitating carrier separation, while the Lewis basic sites within the COF enhance CO 2 adsorption and activation. The resulting CPB@COF-2 composite, containing 19 wt% QDs, achieves a CO production rate of 64.5 μmol•g -1 •h -1 under visible light with 90.97% selectivity, along with an electron consumption rate of 141.8 μmol•g - 1 •h -1 . The material retains over 95% of its initial catalytic activity after 30 hours of continuous operation, demonstrating the dual role of COF confinement in stabilizing perovskite QDs and constructing efficient heterojunctions. This work provides a new design strategy for advanced photocatalytic CO 2 reduction systems.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"29 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059305","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

Trinuclear Copper(I) Furanyl ortho-Diphosphine Halide Clusters: Structure, Photophysical and Photocatalytic Hydrogen Production Properties 三核铜(I)呋喃基邻二膦卤化物簇：结构、光物理和光催化产氢性能

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01864a

Xiang Chen, Li Liu, Xinxin Zhong, Hengjiang Cong, Fa-Bao Li, Fengyan Li, Yi Zhao

{"title":"Trinuclear Copper(I) Furanyl ortho-Diphosphine Halide Clusters: Structure, Photophysical and Photocatalytic Hydrogen Production Properties","authors":"Xiang Chen, Li Liu, Xinxin Zhong, Hengjiang Cong, Fa-Bao Li, Fengyan Li, Yi Zhao","doi":"10.1039/d5dt01864a","DOIUrl":"https://doi.org/10.1039/d5dt01864a","url":null,"abstract":"In recent years, mono-and di-nuclear copper(I) ortho-diphosphine halide complexes have attracted much attention due to their excellent emissive properties. However, trinuclear copper(I) ortho-diphosphine halide clusters have not been reported so far. Herein, three trinuclear Cu(I) furanyl ortho-diphosphine halide clusters Cu 3 X 3 (dppf) 2 [X = I (1), Br (2), Cl(3), dppf = 3,4-bis(diphenylphosphino)furan] were successfully synthesized, and their molecular structures and photophysical properties were systematically studied. The structures of complexes 1-3 reveal that three Cu(I) and two μ 3 -X ions form a trigonal bipyramid, in which three Cu(I) form the plane, with two μ 3 -X ions above and below the plane, respectively.One side of the triangle is bridged by one μ 2 -X ion, while each of the other two sides is bridged by one dppf ligand. At 297 K, complexes 1 and 2 in powder emit yellowish orange light with broad bands (1: λ em = 644 nm, τ = 1.3 μs, Φ = 7.79%; 2: λ em = 614 nm, τ = 14.0 μs, Φ = 9.27%) and complex 3 in powder shows greenish blue delayed fluorescence (λ em = 472 nm; τ = 9.4 μs; Φ = 10.63%). The broad emission bands of complexes 1 and 2 at 297 K are due to 3 XLCT (halogen-to-ligand charge transfer) and cluster-centered phosphorescence ( 3 CC). The emission of complex 3 at 297 K mainly originate from MLCT (metal-to-ligand charge transfer) and ILCT (intraligand charge transfer). Under visible-light irradiation, complexes 1-3 displayed photocatalytic H 2 evolution activity. Complex 3 showed the highest hydrogen production rate of 223.2 μmol/g/h and good photostability.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"24 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059300","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

Zeolite encapsulated Cu(II)-salen complexes for catalytic Rhodamine B degradation 沸石包封Cu(II)-salen配合物催化罗丹明B降解

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01828e

Shuyu Li, Tiankun Guo, Zecui Hui, Han Wang, Kaili Ma

引用次数: 0

Atomically Dispersed Co-Cu Dual Active Sites in Carbon Networks as Efficient Oxygen Electrocatalyst 碳网络中原子分散的Co-Cu双活性位点作为高效氧电催化剂

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01807b

Nibedita Sinha, Chandni Das, Santanu Pal, Rajashri Urkude, Tanbir Ahmed, Biplab Ghosh, Poulomi Roy

引用次数: 0

Circular Polarized Luminescent Framework Materials: From Synthesis to Future Applications 圆偏振发光框架材料：从合成到未来应用

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-15 DOI: 10.1039/d5dt01773d

Jialei Chai, Yan Xia

引用次数: 0

Carboxylate ligands-directed synthesis of cucurbit[5]uril-based coordination polymers for the detection of norfloxacin 羧酸配体定向合成葫芦b[5]脲基配位聚合物用于诺氟沙星的检测

IF 4 3区化学

Dalton Transactions Pub Date : 2025-09-12 DOI: 10.1039/d5dt01769f

Jia Cao, JiaYu Gu, Wen-Ya Ding, Wen-Ya Chen, Zi-Yi Hua, Kai Chen

{"title":"Carboxylate ligands-directed synthesis of cucurbit[5]uril-based coordination polymers for the detection of norfloxacin","authors":"Jia Cao, JiaYu Gu, Wen-Ya Ding, Wen-Ya Chen, Zi-Yi Hua, Kai Chen","doi":"10.1039/d5dt01769f","DOIUrl":"https://doi.org/10.1039/d5dt01769f","url":null,"abstract":"Owing to the large-scale abuse of antibiotics and their great threat to human health, developing efficient sensing materials to monitor antibiotics have attracted enormous attention in recent years. In this work, three novel cucurbit[5]uril-based (Q[5]) coordination polymers (CPs) with the formula of [Ba2(NO3)(H2O)3(L1)(Q[5])]‧8H2O (1), [Ca(H2O)3(L2)(Q[5])0.5] (2) and [Ba4(H2O)4(L3)(Q[5])2]‧(NO3)4‧30H2O (3) were synthesized by employing three different aromatic carboxylate ligands [1,1'-biphenyl]-3,4',5-tricarboxylic acid (H3L1), 2,2'-dinitro-[1,1'-biphenyl]-4,4'-dicarboxylic acid (H2L2), and [1,1'-biphenyl]-3,3',5,5'-tetracarboxylic acid) (H4L3) as the second ligand. Crystal structural analysis revealed that complex 1, 2 and 3 displayed an interesting structural variation from 1D coordination chains (1) to 2D coordination networks (2) to unique 3D coordination frameworks (3), suggesting that the substitution groupsand the coordination modes of the introduced second ligands have significant effect on the structural dimensions of the formed Q[5]-based coordination polymers. More impressively, complex 2 showed a unique fluorescence ratiometric sensing capability toward norfloxacin (NFX) in aqueous media with high selectivity, superior sensitivity and low detection limit.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"9 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035656","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