Structure Switching and Modulation of the Magnetic Properties in Diarylethene-Bridged Metallosupramolecular Compounds by Controlled Coordination-Driven Self-Assembly

Zhao-Yang Li; Jing-Wei Dai; Marko Damjanović; Takuya Shiga; Jin-Hua Wang; Jia Zhao; Hiroki Oshio; Masahiro Yamashita; Xian-He Bu

doi:10.1002/anie.201900789

Structure Switching and Modulation of the Magnetic Properties in Diarylethene-Bridged Metallosupramolecular Compounds by Controlled Coordination-Driven Self-Assembly

Angew Chem Int Ed Engl. 2019 Mar 22;58(13):4339-4344. doi: 10.1002/anie.201900789. Epub 2019 Feb 18.

Authors

Zhao-Yang Li¹, Jing-Wei Dai², Marko Damjanović³, Takuya Shiga⁴, Jin-Hua Wang¹, Jia Zhao¹, Hiroki Oshio⁴, Masahiro Yamashita^{5

6}, Xian-He Bu^{1

7}

Affiliations

¹ School of Materials Science and Engineering, Nankai University, 38 Tongyan Road, Haihe Educational Park, Tianjin, 300350, P. R. China.
² State Key Laboratory of Medicinal Chemical Biology, Nankai University, 94 Weijin Road, Tianjin, 300071, P. R. China.
³ Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
⁴ Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennnodai 1-1-1, Tsukuba, 305-8571, Japan.
⁵ Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan.
⁶ WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan.
⁷ State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, P. R. China.

PMID: 30672103
DOI: 10.1002/anie.201900789

Abstract

We report three self-assembled iron complexes that comprised an anti-parallel open form (o-L_anti ), a parallel open form (o-L_syn ), and a closed form (c-L) of diarylethene conformers. Under kinetic control, Fe^II ₂ (o-L_anti )₃ was isolated, which exhibited a dinuclear structure with diamagnetic properties. Under light-irradiation control, Fe^II ₂ (c-L)₃ was prepared and exhibited paramagnetism and spin-crossover behaviour. Under thermodynamic control and in the presence of indispensable [Fe^III (Tp*)(CN)₃ ]^- , Fe^II ₂ (o-L_anti )₃ and Fe^II ₂ (c-L)₃ transformed into tetranuclear Fe^III ₂ Fe^II ₂ (o-L_syn )₂ , which exhibited complete spin-crossover behaviour at T_1/2 =353 K.

Keywords: iron complexes; photochromism; self-assembly; spin-crossover; supramolecular chemistry.

Abstract

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