The preparation of tetracyanonickelates showing electrical conductivity

Syntheses and characterizations of the cyanide-bridged heteronuclear polymeric complexes with 2-ethylimidazole

“…The cyanide stretching bands in the Raman spectra of the complexes were observed at 2166 and 2131 cm -1 in the Cu-Ni-etim, at 2182 and 2142 cm -1 in the Zn-Ni-etim, at 2156 cm -1 in the Cd-Ni-etim, respectively. On the other hand, the in-plane bending vibrational mode, δ (NiCN) was observed at 414 cm -1 in the FT-IR spectrum of the K 2 [Ni(CN) 4 ]H 2 O which was shifted to the higher frequency range around 1-12 cm -1 for the complexes. This result supports the shift of ν (C≡N) stretching vibrational band.…”

“…Thermoanalytical data of the complexes. 4 ] n .We investigated these complexes using vibration (FT-IR and Raman) spectroscopy, thermal and elemental analyses techniques. On the basis of the spectroscopic results, we suggest that the polymeric structures of the Cu-Ni-etim and the Zn-Ni-etim complexes consist of 1D coordination polymer, while the Cd-Ni-etim complex presents a 2D network.…”

“…Therefore, they have still continued actuality in the coordination chemistry [1][2][3]. Additionally, cyanometallate complexes exhibiting polymeric structures have found many application areas such as electrical conductivity [4], molecular sieves and ion exchange materials [5], molecular magnetic nanowires [6] and host-guest systems [7].…”

“…4 ] -have been extensively utilized to form multidimensional networks [3,[8][9][10]. This is due to fact that both the carbon and the nitrogen ends of the cyanide ion act as Lewis bases that can coordinate two different metal cations acting as the corresponding Lewis acids.…”

“…Accordingly, cyanometallate readily forms coordination polymers when reacted with transition-metal cations and can promote strong magnetic exchange. However, there have been many studies on octahedral [M(CN) 6 ] n-but little interest has been drawn to square-planar [M(CN) 4 ] n-[M(II) = Ni, Pd or Pt] bridging units [11][12][13]. The well-known Hofmann- …”