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Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
Published on: July 4, 2016
Aggregation-Induced Spin-Crossover Switching in a Spin-Labile Iron(II) Complex
Fangqing Gao1, Binbin Wang1, Yan Liu1
1Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Abstract:
In this study, an aggregate-responsive spin crossover (SCO) system was presented based on the spin-labile iron(II) complex Fe(HL)2(NCS)2·2DMF (1) (HL = methyl 2-(2-pyridinyl)-1H-benzimidazole-6-carboxylate). Complex 1 exhibits the switchable SCO behavior between the solution and crystalline state through the solvent-driven aggregation control. The addition of the poor solvent dioxane to the methanol solution of the title complex not only generates nanoparticles with increasingly larger sizes in accompaniment with the absence of SCO but also changes the orientation of the isothiocyanate from cis in the methanol solution to the trans isomer in the aggregate or solid via an aggregation process.
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