Ferrocene-appended ligands for use in spin crossover-redox "hybrid" complexes of iron(II) and cobalt(II)
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Updated: Apr 24, 2026
Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
Published on: March 12, 2015
Hayley S Scott1, Christopher J Gartshore, Si-Xuan Guo
1School of Chemistry, Building 23. and Monash University, Clayton, Victoria 3800, Australia. keith.murray@monash.edu.
Abstract:
In a study of multifunctional ('hybrid') molecular materials, with one function being spin-crossover and the second being reversible redox behaviour, we describe ferrocene-appended ligands and their d(6) and d(7) complexes trans-[Fe(II)(FTP)2(NCS)2] (1), [Co(II)(FTTP)2](ClO4)2·2(MeCN) (2) and [Fe(II)(FTTP)2](ClO4)2·Et2O (3) (where FTP = 4-(2-pyridyl)-1H-1,2,3-triazol-1-ylferrocene and FTTP = 4'-ferrocenyl-2,2':6',2''-terpyridine). The structures, magnetism and solution electrochemistry are described. Complex 1 remains high-spin, 2 displays gradual, incomplete spin crossover and 3 remains low-spin between 350-2 K. The electrochemical results show that one-electron oxidations at the ferrocene group, located external to the coordination site, occur at more positive potentials than the 'inner' M(II/III) couple in 1 and 2, but not in 3, and this has implications for retaining and influencing spin transitions at the M(II) centres, in future.
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