{"title":"Centrosymmetric paddlewheel copper(II) complexes as potent intercalators: synthesis, crystal structure description and DNA-binding studies","authors":"A. Mushtaq, M. Iqbal, Saqib Ali, M. Tahir","doi":"10.1080/10610278.2022.2137412","DOIUrl":null,"url":null,"abstract":"ABSTRACT Two copper(II) paddlewheel carboxylate complexes 1 and 2 of the general formula ACuL4CuA, where A is DMSO (1) and meta-bromopyridine (2) and L is meta-chlorophenyl acetate, have been synthesised, isolated quantitatively, crystallised and characterised using FTIR, UV-Visible spectroscopy, electrochemistry and XRD. FTIR spectra contained all the required peaks with the most prominent peaks those of carboxylate moiety indicating the bridging bidentate carboxylate binding mode. Electrochemistry yielded results typical of complexes containing Cu2+ centres. The structures were completely solved by XRD technique assigning square pyramidal geometry to each copper ion of the dinuclear complexes. The square base is formed by four oxygen atoms of the carboxylate moiety while the apical position is occupied by the fifth oxygen (of the DMSO molecule in 1) or nitrogen of the meta-bromopyridine in complex 2. The DNA-binding potency of the complexes was explored by viscometry, cyclic voltammetry, UV-Visible spectrophotometry and spectrofluorimetry. All these techniques provided coincident results and showed that the complexes bonded with DNA via an intercalative-binding mode. Additionally, these complexes were found to scavenge the free radical DPPH effectively. The complexes add interesting and valuable addition to the existing treasury on the copper paddlewheel complexes and their biological relevance. Graphical Abstract","PeriodicalId":22084,"journal":{"name":"Supramolecular Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2021-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Supramolecular Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1080/10610278.2022.2137412","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
ABSTRACT Two copper(II) paddlewheel carboxylate complexes 1 and 2 of the general formula ACuL4CuA, where A is DMSO (1) and meta-bromopyridine (2) and L is meta-chlorophenyl acetate, have been synthesised, isolated quantitatively, crystallised and characterised using FTIR, UV-Visible spectroscopy, electrochemistry and XRD. FTIR spectra contained all the required peaks with the most prominent peaks those of carboxylate moiety indicating the bridging bidentate carboxylate binding mode. Electrochemistry yielded results typical of complexes containing Cu2+ centres. The structures were completely solved by XRD technique assigning square pyramidal geometry to each copper ion of the dinuclear complexes. The square base is formed by four oxygen atoms of the carboxylate moiety while the apical position is occupied by the fifth oxygen (of the DMSO molecule in 1) or nitrogen of the meta-bromopyridine in complex 2. The DNA-binding potency of the complexes was explored by viscometry, cyclic voltammetry, UV-Visible spectrophotometry and spectrofluorimetry. All these techniques provided coincident results and showed that the complexes bonded with DNA via an intercalative-binding mode. Additionally, these complexes were found to scavenge the free radical DPPH effectively. The complexes add interesting and valuable addition to the existing treasury on the copper paddlewheel complexes and their biological relevance. Graphical Abstract
期刊介绍:
Supramolecular Chemistry welcomes manuscripts from the fields and sub-disciplines related to supramolecular chemistry and non-covalent interactions. From host-guest chemistry, self-assembly and systems chemistry, through materials chemistry and biochemical systems, we interpret supramolecular chemistry in the broadest possible sense. Interdisciplinary manuscripts are particularly encouraged. Manuscript types include: high priority communications; full papers; reviews, and; Methods papers, techniques tutorials highlighting procedures and technologies that are important to the field. We aim to publish papers in a timely fashion and as soon as a paper has been accepted and typeset it will be published in electronic form on the Latest articles section of the website. The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field. Under normal circumstances, Supramolecular Chemistry does not consider manuscripts that would be more suitable in a highly specialized journal. This includes, but is not limited to, those based mostly or exclusively on topics such as solid state/X-ray structures, computational chemistry, or electrochemistry. .
The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field.