Cyano-bridged polynuclear coordination compounds derived from paramagnetic [Mn(H2daptsc)]2+ and photochromic [Fe(CN)5NO]2− building blocks

Heptacoordinated metal complexes with a pentadentate ligand 2,6-diacetylpyridine-bis(thiosemicarbazone) (H2daptsc) were used for the first time ever as building blocks to create polynuclear multifunctional molecular materials. Reactions of the paramagnetic [Mn(II)(H2daptsc)(H2O)2](ClO4)2 and [Mn(II)(H2daptsc)Cl2] complexes with photochromic sodium nitroprusside Na2[Fe(II)(CN)5NO].2H2O were studied. As a result, six polynuclear phases were obtained: {Mn(H2daptsc)Fe(CN)5NO}n·0.5n(MeOH)·0.5n(H2O) (1), {Mn(H2daptsc)Fe(CN)5NO}3n·8n(MeOH) (2), {Mn(H2daptsc)Fe(CN)5NO}2n·n(MeOH)·n(H2O) (3), [Mn(H2daptsc)Cl]2[Fe(CN)5NO] (4), {Mn(H2daptsc)Fe(CN)5NO}n·2n(H2O) (5) and {Mn(H2daptsc)Fe(CN)5NO}n·n(EtOH) (6). The crystal structures of the phases as well as the magnetic and photochromic properties of 1 and 4 were studied.