Dalton Transactions最新文献_第9页

Correction: Highly efficient yellow emission and abnormal thermal quenching in Mn2+-doped Rb4CdCl6

IF 3.5 3区化学

Dalton Transactions Pub Date : 2024-12-05 DOI: 10.1039/D4DT90215G

Dayu Huang, Qiuyun Ouyang, Youchao Kong, Bo Wang, Ziyong Cheng, Abdulaziz A. Al Kheraif, Hongzhou Lian and Jun Lin

引用次数: 0

Zr4+-doped sodium manganese oxide: enhanced electrochemical performance as a cathode in sodium ion batteries

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-05 DOI: 10.1039/d4dt02894e

Bristisnata Kashyap, Dimple P. Dutta, B. Modak, Sanjay Kumar, Balaji R. Ravuri

{"title":"Zr4+-doped sodium manganese oxide: enhanced electrochemical performance as a cathode in sodium ion batteries","authors":"Bristisnata Kashyap, Dimple P. Dutta, B. Modak, Sanjay Kumar, Balaji R. Ravuri","doi":"10.1039/d4dt02894e","DOIUrl":"https://doi.org/10.1039/d4dt02894e","url":null,"abstract":"Sodium manganese oxides are regarded as a valuable class of cathode materials for sodium-ion batteries. By varying the stoichiometry of Na, Mn and O, it is possible to obtain layered, tunnel and spinel type structures, which can withstand the electrochemically-triggered sodiation–desodiation process. In this work, we report the electrochemical performance of Na4Mn2O5, a sodium-rich manganese oxide, which has been previously reported to suffer from structural instability due to the Jahn–Teller distortion of the Mn3+ ion. It was observed that the Na4Mn2−xZrxO5 (x = 0.1) cathode delivered a discharge capacity of ∼203 mA h g−1 post 250 cycles with a capacity retention rate of ∼82.8% on doping with Zr4+ ions. The improvement in cycling ability and rate capability is attributed to the enhanced structural stability and improved electronic conduction brought about by the substitution of Mn3+ by Zr4+ in Na4Mn2O5. Density functional theory-based studies were conducted, which adequately support the obtained results.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"19 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777071","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

Deciphering the Direct Heterometallic Interaction in κ3-bis(donor)ferrocenyl-transition-metal Complexes

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-05 DOI: 10.1039/d4dt03019b

Zsolt Kelemen, Máté Bartek, Eszter Makkos

引用次数: 0

Synthesis, Structure, Oxygen Evolution Reaction (OER) and Visible - light Assisted Organic Reaction Studies on A2M2TeB2O10 (A = Ba, Pb; M = Mg, Zn, Co, Ni, Cu, Fe)

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02706j

Srinivasan Natarajan, Indrani G Shanmugapriya, Shreenibasa Sa

{"title":"Synthesis, Structure, Oxygen Evolution Reaction (OER) and Visible - light Assisted Organic Reaction Studies on A2M2TeB2O10 (A = Ba, Pb; M = Mg, Zn, Co, Ni, Cu, Fe)","authors":"Srinivasan Natarajan, Indrani G Shanmugapriya, Shreenibasa Sa","doi":"10.1039/d4dt02706j","DOIUrl":"https://doi.org/10.1039/d4dt02706j","url":null,"abstract":"Compounds with the general formula A2M2TeB2O10 (A = Ba, Pb; M = Mg, Zn, Co, Ni, Cu, Fe) have been prepared by solid state techniques and characterised. The structure has M2B2O10 layers connecteyd by TeO6 octahedra giving rise to a three dimensional structure with voids where the Ba2+ ions reside. Substitution of transition elements (M = Co, Ni, Cu) in place of Mg in Ba2Mg2TeB2O10 and (Ba0.5Pb1.5)Mg2TeB2O10 gives rise to interesting colored compounds. The NIR reflectivity studies indicated that the white-colored compounds exhibiting good NIR reflectivity that is comparable to TiO2. The dielectric studies indicated reasonable values with low dielectric loss at low frequencies. The cobalt substituted compounds Ba2(MgCo)TeB2O10 and (Ba0.5Pb1.5)(MgCo)TeB2O10 were explored towards oxygen evolution reaction (OER) in alkaline medium. The compound (Ba0.5Pb1.5)(MgCo)TeB2O10 was found to a good electrocatalyst for OER reaction with faradaic efficiency of ∼ 96%. The Cu-substituted compound, Ba2(Mg1.5Cu0.5)TeB2O10 was found to be a good photocatalyst for the formation of α-chloroketones under visible light in the presence of molecular oxygen.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"46 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763160","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

Two novel SNS-donor palladium(II) complexes of benzoxazole and benzothiazole derivatives as potential anticancer agentsPlease do not adjust margins

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02684e

Xiaomeng Ma, Yuting Xie, Jiazhen Tang, Jian Xue, Zhanfen Chen

{"title":"Two novel SNS-donor palladium(II) complexes of benzoxazole and benzothiazole derivatives as potential anticancer agentsPlease do not adjust margins","authors":"Xiaomeng Ma, Yuting Xie, Jiazhen Tang, Jian Xue, Zhanfen Chen","doi":"10.1039/d4dt02684e","DOIUrl":"https://doi.org/10.1039/d4dt02684e","url":null,"abstract":"Two novel mononuclear palladium(II) complexes, [PdL1Cl]Cl (1) and [PdL2Cl]Cl (2) with SNS-donor ligands (where L1= N-(4-(benzo[d]oxazol-2-yl)phenyl)-2-(bis(2-ethylthioethyl)amino)acetamide, L2 = N-(4-(benzo[d]thiazol)-2-yl)phenyl)-2-(bis(2-ethylthioethyl)amino)acetamide), were synthesized and characterized. In vitro antiproliferative activity tests showed that the two palladium(II) complexes displayed excellent antiproliferative activity against all the tested cancer cell lines, especially the human colon cancer HCT-116, the human liver cancer HepG-2, and the human breast cancer MDA-MB-231 cells. Spectacularly, complexes 1 and 2 exhibited an approximate 8.49- and 6.88-fold higher antiproliferative activity as compared with cisplatin against HCT-116, respectively, but were less toxic to the human normal colon fibroblast CCD-18Co cell lines with the selectivity index (SI  IC50(CCD-18Co)/IC50(HCT-116)) values of 22.43 and 21.48 for 1 and 2, respectively, compared to cisplatin (SI, 1.74). The results suggested that the two palladium complexes have the potential to act as a candidate for the treatment of colorectal cancer. The interaction of the complexes with CT-DNA illustrated that both 1 and 2 could strongly bind to the DNA helix via intercalative mode and covalent interaction and DNA binding affinity of 1 was slightly higher than that of 2. Additionally, investigations of the reaction of the two complexes with 5-GMP and glutathione (GSH) showed that both 1 and 2 could readily react with 5-GMP and GSH to form the Pd-GMP adducts and the Pd-GS adducts, respectively, and when 5-GMP and GSH coexisted, the coordination binding of the complexes with GSH did not prevent the formation of the Pd-GMP adducts. Moreover, Hoechst 33342 staining and flow cytometry analysis demonstrated that the two palladium(II) complexes arrested the HCT-116 cells mainly at the G2/M phase, induced mitochondrial membrane depolarization, increased ROS generation, and triggered obvious cell apoptosis.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"78 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763174","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 Terpyridine based Copper Complex for Electrochemical Reduction of Nitrite to Nitric Oxide

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02777a

Jyotiprokash Biswas, Sebastian Sanden, Prabhakar Bhardwaj, Daniel Siegmund, Pankaj Kumar, Ulf-Peter Apfel

{"title":"A Terpyridine based Copper Complex for Electrochemical Reduction of Nitrite to Nitric Oxide","authors":"Jyotiprokash Biswas, Sebastian Sanden, Prabhakar Bhardwaj, Daniel Siegmund, Pankaj Kumar, Ulf-Peter Apfel","doi":"10.1039/d4dt02777a","DOIUrl":"https://doi.org/10.1039/d4dt02777a","url":null,"abstract":"In biological systems, nitrite reductase enzymes (NIRs) are responsible for reduction of nitrite (NO2-) to nitric oxide (NO). These NIRs have mostly Cu or Fe containing active sites, surrounded by amine containing ligands. Therefore, mononuclear Cu complexes with N-donor ligands are highly relevant in the development of NIR model systems and in the mechanistic investigation of nitrite reduction reaction. Herein, we report on a terpyridine based CuII complex with a square planar geometry for H+ assisted electrochemical reduction of NO2-. Through electrochemical measurements, spectroscopic characterization and isotope labelling experiments we propose a mechanistic reaction pathway involving an unstable HNO2 state. The CuI intermediate, formed electrochemially was isolated and its molecular structure was deduced, showing linkage isomerism of nitrite ligand. Moreover, qualitatitve and quantitative product analysis by GC-MS shows N2O formed as a side product along with the main product NO. Furthernore, by obtaining single crystals and structural analysis we have managed to determine the structural arrangement and redox state of the complex after electrochemical treatment.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"53 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777133","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

Proton-conducting lanthanide metal-organic frameworks: A platform for multifunctionality

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02692f

Soumava Biswas, Dev Kumar Thapa, Leena Mandal

{"title":"Proton-conducting lanthanide metal-organic frameworks: A platform for multifunctionality","authors":"Soumava Biswas, Dev Kumar Thapa, Leena Mandal","doi":"10.1039/d4dt02692f","DOIUrl":"https://doi.org/10.1039/d4dt02692f","url":null,"abstract":"Lanthanide metal-organic frameworks (LMOFs) have established themselves as a promising proton-conducting material among all types of porous coordination polymers and covalent organic frameworks. The structural diversity of LMOFs and high oxophilicity with a high coordination number of lanthanide ions make the LMOFs a standout material for proton conductivity. Ample research effort has been devoted for the last few years to designing and developing proton-conducting lanthanide metal-organic frameworks (PCLMOFs). Some of the PCLMOFs have shown great potential with proton conductivity comparable to commercially used perfluorosulfonic acids (PFSAs) polymers for proton-exchange membrane (PEM) in fuel cells. Now it is also apparent that PCLMOFs are becoming a potential platform to explore other functional properties (e.g. fluorescence sensing, gas adsorption, molecular magnetism, impedance sensing, ferroelectricity, and nonlinear optics). The intrinsic structural features of PCLMOFs inevitably bring the opportunity to introduce the multifunctional character of such materials. So, any scope for additional functional property must be investigated for this class of material. In this article, we have concisely discussed the design strategy and structural features of some multifunctional PCLMOFs. The multifunctional properties of some excellent PCLMOFs are reviewed. In addition, the prospect of PCLMOFs is briefly discussed in the context of real-world material applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"18 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763168","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

UTSA-16(Zn) for SO2 detection: elucidating the fluorescence mechanism

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02852j

Valeria López-Cervantes, Marco L. Martínez, Juan L. Obeso, Celene García Carvajal, N. S. Portillo-Vélez, Ariel Guzman-Vargas, Ricardo A. Peralta, Eduardo González-Zamora, Ilich A. Ibarra, Diego Solis-Ibarra, John Luke Woodliffe, Yoarhy A. Amador-Sánchez

引用次数: 0

Ni(II)-dithiocarbamate and -diphosphine coordination complexes as pre-catalysts for electrochemical OER activity

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt02447h

Sarvesh Kumar Pal, Toufik Ansari, Chote Lal Yadav, Nanhai Singh, Prem Lama, Arindam Indra, Kamlesh Kumar

{"title":"Ni(II)-dithiocarbamate and -diphosphine coordination complexes as pre-catalysts for electrochemical OER activity","authors":"Sarvesh Kumar Pal, Toufik Ansari, Chote Lal Yadav, Nanhai Singh, Prem Lama, Arindam Indra, Kamlesh Kumar","doi":"10.1039/d4dt02447h","DOIUrl":"https://doi.org/10.1039/d4dt02447h","url":null,"abstract":"Electrochemical water oxidation holds immense potential for sustainable energy generation, splitting water into clean-burning hydrogen and life-giving oxygen. However, a key roadblock lies in the sluggish nature of the oxygen evolution reaction (OER). Finding stable, cost-effective, and environmentally friendly catalysts with high OER efficiency is crucial to unlock this technology's full potential. Here, we have synthesized four new cationic heteroleptic Ni(II) complexes having formula [Ni(S^S)(P^P)]PF6 (1-4) where S^S represents bidentate dithiocarbamate ligands (N,N-bis(benzyl)dithiocarbamate and N-benzyl-N-3-picolyldithiocarbamate) and P^P represents diphosphine ligands (1,2-bis(diphenylphosphino)ethane (dppe) and 1,1-bis(diphenylphosphino)ferrocene (dppf)). Complexes are characterized by UV-Vis, FT-IR, and multinuclear NMR spectroscopic techniques. Single crystal X-ray structures of all complexes are also reported. The molecular structures revealed distorted square planar geometry around Ni(II) center defined by bidentate S^S dithiolates chelating ligand and P^P diphosphine chelating ligand. Interestingly, complexes exhibit weak non-covalent interactions, contributing to the overall supramolecular structures. The role of complexes in water oxidation has been investigated electrochemically in 1.0 M KOH solution after immobilization onto the surface of activated carbon cloth (CC). The detailed analyses revealed that the complexes are promising precatalysts for generating active Ni(OH)2/NiO(OH) as true oxygen evolution reaction (OER) catalyst at CC upon anodic activation. Notably, catalyst derived from complex 4@CC exhibited the highest OER activity with a Tafel slope of 93 mV/decade and reaching a current density of 10 mA cm-2 at a low overpotential of 250 mV in 1.0 M KOH solution. This study reveals the significance of dithiocarbamate and diphosphine ligands in facilitating the conversion of Ni(II) complexes into highly active OER catalysts.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"85 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763169","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

Study of the molecular design and synthesis status of metal complexes as unimolecular luminescent materials for white light emission

IF 4 3区化学

Dalton Transactions Pub Date : 2024-12-04 DOI: 10.1039/d4dt03047h

Masahisa Osawa

引用次数: 0