孟银杉

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研究员

博士生导师

硕士生导师

性别:男

毕业院校:北京大学

学位:博士

所在单位:化工学院

学科:无机化学

办公地点:大连理工大学西部校区精细化工国家重点实验室F区208

联系方式:Tel:0411-84986261 email:mengys@dlut.edu.cn

电子邮箱:mengys@dlut.edu.cn

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Effect of Intermolecular Interactions on Metal-to-Metal Charge Transfer: A Combined Experimental and Theoretical Investigation

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论文类型:期刊论文

发表时间:2019-09-11

发表刊物:Angewandte Chemie (International ed. in English)

收录刊物:PubMed

ISSN号:1521-3773

关键字:cobalt,metal-to-metal charge transfer,spin transition,thermochromics,π⋅⋅⋅π interactions

摘要:Understanding the effects of intermolecular interactions on metal-to-metal charge transfer (MMCT) is crucial to develop molecular devices by grafting MMCT-based molecular arrays. Herein, we report a series of solvent-free {Fe2 Co2 } compounds sharing the same cationic tetranuclear {[Fe(PzTp)(CN)3 ]2 [Co(dpq)2 ]2 }2+ (PzTp- =tetrakis(pyrazolyl)borate, dpq=dipyrido[3,2-d:2',3'-f]quinoxaline) square units but having anions with different size, including BF4- , PF6- , OTf- , and [Fe(PzTp)(CN)3 ]- . Intermolecular π⋅⋅⋅π interactions between dpq ligands, which coordinate to cobalt ions in the {[Fe(PzTp)(CN)3 ]2 [Co(dpq)2 ]2 }2+ units, can be modulated by introducing different counterions, regulating the distortion of the CoN6 octahedron and ligand field around the cobalt ions. This change results in different MMCT behavior. Computational analyzes reveal the substantial role of the intermolecular interactions tuned by the presence of different counteranions on the MMCT behavior.© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.