期刊
DALTON TRANSACTIONS
卷 43, 期 40, 页码 15212-15220出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt02126f
关键词
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资金
- ARC Discovery Grant
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)center dot 2(MeCN) (2) and [Fe-II(FTTP)(2)](ClO4)(2)center dot 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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