Dalton Transactions最新文献

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Synthesis and characterisation of MoIV-oxo dithiolenes: formate dehydrogenase active site mimetics moiv -氧二噻吩的合成与表征:甲酸脱氢酶活性位点模拟物
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01233c
Isaac J. Furney, Joseph A Wright
{"title":"Synthesis and characterisation of MoIV-oxo dithiolenes: formate dehydrogenase active site mimetics","authors":"Isaac J. Furney, Joseph A Wright","doi":"10.1039/d5dt01233c","DOIUrl":"https://doi.org/10.1039/d5dt01233c","url":null,"abstract":"The active sites of metalloezymes continue to inspire synthetic chemists to create structural models of the intricate structures seen in biology. As well as the fundamental intellectual challenge, this is driven by the potential societal impact that many of these systems offer. The formate dehydrogenases (FDH) hold such potential: formate is one of the key candidates as a hydrogen carrier for future energy transport. Efforts at mimicking the active site of FDH require the synthesis of (functionalised) molybdenum bis(dithiolene) complexes, principally featuring the Mo=O unit. In this review, we give an overview of the synthetic routes used to date in these efforts, along with key infrared and electrochemical data for the full collection of synthetic complexes reported to date.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"31 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770062","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
Silver Dithiocarbamates Derived from Amino Acid Esters 从氨基酸酯中提取的二硫代氨基甲酸银
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01476j
Vreni Behling, Jakob Heinrich, Dolores Díaz, Elias Heiko Paul Brohmer, Julian Heinrich, Nils Schloerer, Stephan Kupfer, Nora Kulak, Phil Köhler
{"title":"Silver Dithiocarbamates Derived from Amino Acid Esters","authors":"Vreni Behling, Jakob Heinrich, Dolores Díaz, Elias Heiko Paul Brohmer, Julian Heinrich, Nils Schloerer, Stephan Kupfer, Nora Kulak, Phil Köhler","doi":"10.1039/d5dt01476j","DOIUrl":"https://doi.org/10.1039/d5dt01476j","url":null,"abstract":"We report herein a series of new silver compounds with dithiocarbamate ligands derived from amino acid esters (AAE-DTCs). Compounds [AgSSC-N(R')(CHR''COOR)]n (Ag(L1)Ag(L5); Ndithioato-diethyliminodiacetate (L1), -ethyl-sarcosinate (L2), -tert-butyl-sarcosinate (L3), -methyll-prolinate (L4), -ethyl-N-benzylglycinate (L5)) were synthesised from in situ generated AAE-DTCs by salt metathesis with silver nitrate. The isolated products were characterised by dierent analytical techniques. Ag(L1), Ag(L4), and Ag(L5) were accessible to single-crystal X-ray structure determination, comprising hexameric subunits linked by a dimeric unit into a 1D-polymeric structure (Ag(L1)) and more homogeneous ribbon-like polymeric structures (Ag(L4) and Ag(L5)). DOSY-NMR measurements and supporting DFT calculations were carried out to elucidate the structure of these compounds in solution, showing evidence for smaller agglomerates like dimers and tetramers. Additionally, as rst evaluation of the biological activity of these complexes, ethidium bromide displacement assays and DNA melting curve experiments were carried out, the results showing moderate DNA binding abilities.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"56 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770110","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
Significant electrochemical performance improvement for anion MOF-based solid-state electrolyte across wide temperature range via ion exchange strategy 通过离子交换策略,阴离子mof基固态电解质在宽温度范围内的电化学性能显著提高
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01485a
Changqi Gu, Wenyu Ding, Sheng Jin, Xinyu Tang, Xin Zhang, Li Fan, Zhiliang Liu, Xiaomin Kang
{"title":"Significant electrochemical performance improvement for anion MOF-based solid-state electrolyte across wide temperature range via ion exchange strategy","authors":"Changqi Gu, Wenyu Ding, Sheng Jin, Xinyu Tang, Xin Zhang, Li Fan, Zhiliang Liu, Xiaomin Kang","doi":"10.1039/d5dt01485a","DOIUrl":"https://doi.org/10.1039/d5dt01485a","url":null,"abstract":"Abstract: Low ionic conductivity (σ) and high activation energy (Ea) seriously hinder the development of solid-state electrolytes (SSEs). Herein, a series of post-modified Li⁺@Ni-MOF-X (X = 1, 2, 3) materials have been synthesized via ion exchange based on a 3D anionic trinuclear cluster-based metal-organic framework (MOF) (Ni-MOF: {[H₂N(CH3)2]2[Ni3(μ3-O) (XN)(BDC)3]·6DMF}n). Compared to the pristine Ni-MOF, Li⁺@Ni-MOF-2 exhibits significantly enhanced performance as SSEs, featuring a higher σ of 1.28 × 10⁻3 S cm⁻¹, a larger lithium-ion transference number (tLᵢ⁺) of 0.76, and a wider electrochemical stability window (ESW) of 5.3 V at room temperature (Ni-MOF: 2.19 × 10⁻4 S cm−1, 0.57, and 5.0 V). Notably, Li+@Ni-MOF-2 maintains excellent σ even at −40 °C (2.12 × 10⁻4 S cm⁻1) and exhibits an ultra-low Ea (0.08 eV) from 10 to 100 °C, demonstrating potential practical application over a wide temperature range. Moreover, LiFePO4| Li⁺@Ni-MOF-2 |Li full cells stably cycled for 150 cycles at 0.1 C with a capacity retention of 81.30%. This work enriches the types of efficient MOF-based SSEs and paves the way for the promising application of SSE lithium metal batteries across wide operating temperatures.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"26 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770061","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
The miracle of self-assembly: a journey of the {Ln6F8} core in the world of lanthanides. 自组装的奇迹:{Ln6F8}核在镧系元素世界的旅程。
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01105a
Evgeny D Boltkov,Mikhail E Buzoverov,Elmira Kh Lermontova,Yury A Belousov,Dmitry A Steshenko,Victoria E Gontcharenko,Tatyana Yu Glazunova
{"title":"The miracle of self-assembly: a journey of the {Ln6F8} core in the world of lanthanides.","authors":"Evgeny D Boltkov,Mikhail E Buzoverov,Elmira Kh Lermontova,Yury A Belousov,Dmitry A Steshenko,Victoria E Gontcharenko,Tatyana Yu Glazunova","doi":"10.1039/d5dt01105a","DOIUrl":"https://doi.org/10.1039/d5dt01105a","url":null,"abstract":"This work presents a unique example of the self-assembly of {Ln6F8} clusters composed of Ln3+ cations and F- and CF3COO- anions. The crystal structures of new fluorotrifluoroacetate compounds with the general formula A2[Ln6(μ3-F)8(tfa)12L6], where A = Na and Ln = Pr(I), Eu (IIa), Tb(iii), Dy(iv) and Tm(v); A = Na and H3O+ and Ln = Eu (IIb); or A = K and Ln = Yb(vi); tfa = CF3COO- (trifluoroacetate anion); L = Htfa (CF3COOH, trifluoroacetic acid) and H2O, determined by the single-crystal XRD method revealed that they were constructed from the complex anion [Ln6(μ3-F)8(tfa)12L6]2- and alkali metal (or alkali metal and hydroxonium) cations and included solvate molecules in some cases. The core of the anion presented a rhombododecahedral unit of six lanthanide atoms linked by bridging fluoride and trifluoroacetate anions. The nature of the counterion led to the formation of compounds with different dimensions: from 1D for potassium cations and 2D for sodium cations to 3D for sodium and hydroxonium cations. The {Ln6F8} clusters were obtained for a wide range of lanthanides, with Pr and Yb being the end members; thus, the existence of heterometallic compounds was presumed. At a temperature of 100 °C, the new compounds started to release solvent molecules, whereas the [Ln6(μ3-F)8(tfa)12] core was stable up to 270-300 °C according to the TG-MS data. Substances IIb, III and IV revealed metal-centered luminescence and could be used for the development of new optoelectronic materials.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"15 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769594","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
Bi-doped CoTe Nanoparticles For Nonlinear and Optoelectronics Applications 用于非线性和光电子应用的双掺杂CoTe纳米颗粒
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01043h
Swikruti Supriya, Gangamani Tudu, Prabhukrupa Chinmay Kumar, Monalisa Pradhan, Ramakanta Naik
{"title":"Bi-doped CoTe Nanoparticles For Nonlinear and Optoelectronics Applications","authors":"Swikruti Supriya, Gangamani Tudu, Prabhukrupa Chinmay Kumar, Monalisa Pradhan, Ramakanta Naik","doi":"10.1039/d5dt01043h","DOIUrl":"https://doi.org/10.1039/d5dt01043h","url":null,"abstract":"The exceptional properties and broad applicability of CoTe nanoparticles make them highly relevant for various technological applications, particularly in optoelectronics. Introducing a metal dopant into a nanomaterial matrix has been shown to enhance its characteristics, thereby expanding its potential uses. This study presents a straightforward hydrothermal synthesis method for Bi-doped CoTe nanoparticles, where four different samples were synthesized by varying the Bi doping concentration. Structural characterization via X-ray diffraction confirmed the presence of the hexagonal CoTe phase, with noticeable phase shifts attributed to Bi incorporation. Raman spectroscopy provided insights into the vibrational modes of CoTe, while transmission electron microscopy further verified the CoTe phase and measured interplanar spacing. Field emission scanning electron microscopy morphological study revealed a constant nanoparticle-like structure that did not alter as the concentration of Bi increased. Elemental composition was examined through X-ray photoelectron spectroscopy, confirming the expected material composition. Additionally, UV-Vis spectroscopy revealed a bandgap reduction in the range of 3.35-1.64 eV, suggesting modifications in the material's optical properties. Meanwhile, the refractive index value of the material gradually increased in the range of 2.00-3.08. The photo response study showed a photocurrent ranging from 229 to 810 μA, with the highest observed in the Bi-3 sample. Additionally, a maximum nonlinear absorption coefficient (β) of 1.448 cm/W was recorded. These results indicate the material's strong potential for nonlinear photonics and optoelectronic applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"32 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770106","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
Crystal Engineering of Dinitropyrazine-Based Sodium E-MOFs: Toward Thermally Robust and Low-Sensitivity Energetic Materials 二硝基吡嗪基钠电子mofs的晶体工程:面向热鲁棒和低灵敏度含能材料
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01508a
Manojkumar Jujam, Abhishek Kumar Yadav, Srinivas Dharavath
{"title":"Crystal Engineering of Dinitropyrazine-Based Sodium E-MOFs: Toward Thermally Robust and Low-Sensitivity Energetic Materials","authors":"Manojkumar Jujam, Abhishek Kumar Yadav, Srinivas Dharavath","doi":"10.1039/d5dt01508a","DOIUrl":"https://doi.org/10.1039/d5dt01508a","url":null,"abstract":"The strategic development of thermally stable and low-sensitive energetic materials is vital for next-generation defence and aerospace applications. Herein, we report the synthesis of novel three-dimensional energetic metal–organic frameworks (E-MOFs), NaNODP, NaNPO, and MDPO, via a straightforward synthetic approach. The E-MOFs were confirmed by SCXRD and thoroughly characterized using PXRD, NMR, IR, TGA-DSC, and elemental analysis (EA). NaNODP and NaNPO demonstrate good detonation performance (VOD: 8100–7960 m s-1; DP: 22.13-22.47 GPa), high thermal stability (Td = 291-271 °C), and mechanical insensitivity (IS: >40 J; FS: >360 N), rendering them promising candidates for heat-resistant explosive applications exceeding TNT and HNS and comparable to TATB. Hirshfeld surface and 2D fingerprint analyses underscore the dominance of H⋅⋅⋅O and H⋅⋅⋅N contacts, which play a pivotal role in enhancing thermal stability and reducing mechanical sensitivity. This work offers a molecular-level approach to tuning energetic behaviour through crystal engineering and exploiting intermolecular interactions.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"31 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770078","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
Dynamic processes of the First NHC-Substituted Rhenium Heptahydrides [ReH7(NHC)2] 第一NHC取代铼七氢化物[ReH7(NHC)2]的动力学过程
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-04 DOI: 10.1039/d5dt01655j
Pasquale Gabriele Grieco, Adriano Pierini, Marco Pierini
{"title":"Dynamic processes of the First NHC-Substituted Rhenium Heptahydrides [ReH7(NHC)2]","authors":"Pasquale Gabriele Grieco, Adriano Pierini, Marco Pierini","doi":"10.1039/d5dt01655j","DOIUrl":"https://doi.org/10.1039/d5dt01655j","url":null,"abstract":"In this paper are presented possible geometries and fluxional mechanisms of three [ReH7(NHC)2] complexes (NHC= IMes (1) (1,3-bis(2,4,6-trimethyl phenyl) imidazol-2-ylidene), IMesCl2 (2) (4,5-dichloro-1,3-dihydro-1,3-bis(2,4,6-trimethylphenyl)-2H-imidazol-2-ylidene), BIMes (3) (1,3-Bis(2,4,6-trimethylphenyl)-benzo imidazole ylidene). Using DFT calculations plausible fluxional processes were proposed, and a new process named “η2‒quadratic twist” has been identified. For 2 the intermediate complex [Re(H)5(η2-H2)(IMesCl2)2] proved to be more energetically accessible at RT than those of the complexes 1 ([Re(H)5(η2-H2)(IMes)2]) and 3 ([Re(H)5(η2-H2)(BIMes)2]). Two different fluxional mechanism have been proposed: the first one for 1 and 3, and the second one for 2. The mechanism for the complex 2 implies the C—H activation of the hydrogens of the o‒CH3 of the IMesCl2 ligands.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"13 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144770063","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
Varying Anion Coordination in New Families of Dinuclear NiIILnIII Complexes: Zero Field Slow Relaxation of Magnetization and Theoretical Validations 新的双核niilniii配合物家族中阴离子配位的变化:零场慢弛豫磁化和理论验证
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-02 DOI: 10.1039/d4dt03529a
Biswarup Dutta, Ibtesham Tarannum, Zvonko Jaglicic, Saurabh Kumar Singh, Debashis Ray
{"title":"Varying Anion Coordination in New Families of Dinuclear NiIILnIII Complexes: Zero Field Slow Relaxation of Magnetization and Theoretical Validations","authors":"Biswarup Dutta, Ibtesham Tarannum, Zvonko Jaglicic, Saurabh Kumar Singh, Debashis Ray","doi":"10.1039/d4dt03529a","DOIUrl":"https://doi.org/10.1039/d4dt03529a","url":null,"abstract":"Herein we report the room-temperature synthesis, structural accounts, and magnetic performances of two new families of dinuclear NiII–LnIII complexes, [NiLn(HL)2(NO3)3]·nH2O·CH3CN (1a-1c) (n=1for Ln = Tb and n= 1.5 for Dy, and Ho) and [NiLn(HL)2(OAc)2(H2O)]Cl·5H2O (2a-2c) (Ln = Tb, Dy, and Ho) developed utilizing the ligand H2L (2-methoxy-6-[(E)-2′-hydroxymethyl-phenyliminomethyl]-phenol). Partial deprotonation of H2L in the reaction medium provided HL¯, ideally suited for trapping NiII and selected 4f ions in its two adjacent pockets. X-ray structural characterizations of complexes 1a–2c showed preferential pinning of octahedral NiII center by imine N-donor alongside LnIII centers with coordination number nine in muffin geometry. Both the Dy analogs exhibited clear out-of-phase signals (1b and 2b; Ueff = 20K and 18.7K), in the absence of an external dc field in the ac magnetic susceptibility measurements, whereas slow relaxation of magnetization was apparent under optimally applied fields of 2 and 3 kOe for the Tb analogs (1a and 2a) and Ho analogs (1c and 2c), respectively. Analysis of the static and dynamic magnetic properties were reinforced by thorough CASSCF-based computational scrutiny and density functional theory (DFT) calculations.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"286 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763452","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
Ligand-driven redox transformations and catalytic activity of mononuclear copper complexes: structural and spectroscopic insights 配体驱动的氧化还原转化和单核铜配合物的催化活性:结构和光谱的见解
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-01 DOI: 10.1039/d5dt01511a
Soumen Rakshit, Jyotirmoy Mitra, Rajat Saha, Ram Chandra Maji
{"title":"Ligand-driven redox transformations and catalytic activity of mononuclear copper complexes: structural and spectroscopic insights","authors":"Soumen Rakshit, Jyotirmoy Mitra, Rajat Saha, Ram Chandra Maji","doi":"10.1039/d5dt01511a","DOIUrl":"https://doi.org/10.1039/d5dt01511a","url":null,"abstract":"Eight mononuclear complexes have been synthesized, namely: [(L1)Cu<small><sup>I</sup></small>]ClO<small><sub>4</sub></small> (<strong>1</strong>), [(L2)Cu<small><sup>I</sup></small>]ClO<small><sub>4</sub></small>·CH<small><sub>3</sub></small>CN (<strong>2</strong>·CH<small><sub>3</sub></small>CN), [(L2)Cu<small><sup>II</sup></small>(DMF)](ClO<small><sub>4</sub></small>)<small><sub>2</sub></small>·2DMF·H<small><sub>2</sub></small>O (<strong>3</strong>·2DMF·H<small><sub>2</sub></small>O), [(L1)Cu<small><sup>II</sup></small>(MeCN)](ClO<small><sub>4</sub></small>)<small><sub>2</sub></small> (<strong>4</strong>), [(L1)Cu<small><sup>II</sup></small>(Cl)]PF<small><sub>6</sub></small> (<strong>5</strong>), [(tren)Cu<small><sup>II</sup></small>(MeCN)](ClO<small><sub>4</sub></small>)<small><sub>2</sub></small> (<strong>6</strong>), [(tren)Cu<small><sup>II</sup></small>(Cl)]PF<small><sub>6</sub></small> (<strong>7</strong>) and [(L2ˊ)Cu<small><sup>II</sup></small>(DMF)](ClO<small><sub>4</sub></small>)<small><sub>2</sub></small>·DMF·H<small><sub>2</sub></small>O (<strong>8</strong>·DMF·H<small><sub>2</sub></small>O). In these complexes, copper atoms are coordinated to tetradentate ligands such as tris-(4-(4-(<em>tert</em>-butyl))benzyl-3-aza-3-butenyl)amine (L1), tris(2-aminoethyl)amine (tren), tris-(4-pyren-1-yl-3-aza-3-butenyl)amine (L2) and bis-(4-pyren-1-yl-3-aza-3-butenyl)aminoethylamine (L2’). The complexes were structurally characterized by X-ray crystallography, along with various spectroscopic techniques. Complexes <strong>1</strong> and <strong>2</strong> are Cu(I) complexes, exhibiting trigonal pyramidal geometry, whereas complexes <strong>3</strong> to <strong>8</strong> are Cu(II) complexes with distorted trigonal bipyramidal geometry. Complex <strong>1</strong> shows a quasi-reversible redox response at <em>E<small><sub>1/2</sub></small></em> = 0.567 V (<em>ΔE</em> = 115 mV), while complexes <strong>2</strong> and <strong>3</strong> exhibit quasi-reversible cyclic voltammograms with <em>E<small><sub>1/2</sub></small></em> values of 0.405 V (<em>ΔE</em> = 80 mV) <em>vs.</em> non-aqueous Ag/Ag<small><sup>+</sup></small>. The cyclic voltammograms indicate that the formation of a Cu(II) complex from the oxidation of <strong>1</strong> required more anodic potential than from the oxidation of <strong>2</strong>, highlighting the influence of ligand environment on redox properties. Complex <strong>2</strong> and <strong>3</strong> are interconvertible and exhibit high superoxide dismutase (SOD) mimetic activity, efficiently dismutating O<small><sub>2</sub></small><small><sup>•⁻</sup></small> to O<small><sub>2</sub></small> and H<small><sub>2</sub></small>O<small><sub>2</sub></small> with an impressive IC<small><sub>50</sub></small> value of 5.1 × 10<small><sup>-7</sup></small> M. Upon electrochemical oxidation, under N<small><sub>2</sub></small> atmosphere complex <strong>1</strong> forms complex <strong>4</strong>, which in presence of air, converte","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"37 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756347","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
Supramolecular assemblies and nanoparticle integration studied through quantitative image analysis and 3D reconstruction 通过定量图像分析和三维重建研究超分子组装和纳米颗粒集成
IF 4 3区 化学
Dalton Transactions Pub Date : 2025-08-01 DOI: 10.1039/d5dt01505g
Daeun Jeong, Hyoung Wook Kang, Seojeong Woo, Semi Kim, Soo Ryeon Yoon, Jaedeok Lee, Cheongwon Bae, Ho-Jun Cho, Mingyu Gu, Jong Hwa Jung, Ju Hyun Kim, Kwang Seob Jeong, Sung Ho Jung, Juyeong Kim
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