Tuning of the Critical Temperature in Iron(II) Spin-Crossover Materials Based on Bridging Polycyanidometallates: Pentacyanidonitrosylferrate(II) and Hexacyanidoplatinate(IV)

Herchel R; Travnicek Z; Zboril R

Inorganic Chemistry, Vol.50, No.24, 12390-12392, 2011

DOI10.1021/ic201702j Export Citation

Tuning of the Critical Temperature in Iron(II) Spin-Crossover Materials Based on Bridging Polycyanidometallates: Pentacyanidonitrosylferrate(II) and Hexacyanidoplatinate(IV)

Herchel R, Travnicek Z, Zboril R

The reactions of iron(II) sulfate, 4-amino-3,5-di-2-pyridyl-4H-1,2,4-triazole (abpt), and pentacyanidonitrosylferrate(II) or hexacyanidoplatinate(IV) resulted in the formation of one-dimensional iron(II) spin-crossover compounds [Fe(abpt)(2)(mu-Fe(CN)(5)(NO))](n) (1) and [Fe(abpt)(2)(mu-Pt(CN)(6))](n) (2) with the spin-transition critical temperature near or above room temperature accompanied by thermochromism. Furthermore, it has been proven that the critical temperature T-c is influenced by the type of dianionic polycyanidometallate within the series of discussed systems, and it changes in the sequence of [Fe(CN)(5)(NO)](2-) < {Pt(CN)(6))](2-) < [Ni(CN)(4))](2-) approximate to [Pd(CN)(4))}(2-) approximate to [Pt(CN)(4))](2-).