A large spin-crossover [Fe4L4]8+ tetrahedral cage

Li Li; Naoto Saigo; Yingjie Zhang; Daniel J. Fanna; Nicholas D. Shepherd; Jack K. Clegg; Rongkun Zheng; Shinya Hayami; Leonard F. Lindoy; Janice R. Aldrich-Wright; Chun-Guang Li; Jason K. Reynolds; David G. Harman; Feng Li

doi:10.1039/C5TC00991J

A large spin-crossover [Fe₄L₄]⁸⁺ tetrahedral cage†‡

Li Li,^a Naoto Saigo,^b Yingjie Zhang,^c Daniel J. Fanna,^a Nicholas D. Shepherd,^a Jack K. Clegg,^d Rongkun Zheng,

^e Shinya Hayami,^b Leonard F. Lindoy,^f Janice R. Aldrich-Wright,^a Chun-Guang Li,^a Jason K. Reynolds,^a David G. Harman^gh and Feng Li*^a

Author affiliations

* Corresponding authors

^a School of Science and Health, University of Western Sydney, Penrith, NSW 2751, Australia
E-mail: feng.li@uws.edu.au

^b Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Japan

^c Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC, NSW 2232, Australia

^d School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane St Lucia, QLD 4072, Australia

^e School of Physics, The University of Sydney, NSW 2006, Australia

^f School of Chemistry, The University of Sydney, NSW 2006, Australia

^g Molecular Medicine Research Group, School of Medicine, University of Western Sydney, Building 30, Goldsmith Avenue, Campbelltown, NSW 2560, Australia

^h Office of the Deputy Vice-Chancellor (Research and Development), University of Western Sydney, Penrith, NSW 2751, Australia

Abstract

A large discrete face-capped tetranuclear iron(II) cage, [Fe₄L₄](BF₄)₈·n(solvent), was synthesised via metal-ion directed self-assembly. The cage is formed from a rigid tritopic ligand that incorporates chelating imidazole-imine functional groups. The cage displays temperature induced spin-crossover and LIESST effects and is amongst the largest iron(II) tetrahedral cages with such properties reported. The synthesis, structure and magnetic properties of this new metallo-cage are presented.

This article is part of the themed collection: Spin State Switches in Molecular Materials Chemistry

Journal of Materials Chemistry C

A large spin-crossover [Fe₄L₄]⁸⁺ tetrahedral cage†‡

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A large spin-crossover [Fe₄L₄]⁸⁺ tetrahedral cage

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Journal of Materials Chemistry C