Chemistry Letters, Vol.30, No.3, 214-215, 2001
The first mixed-valence (CoCoIII)-Co-II one-dimensional chain coordination polymer: Synthesis and structure of [(Co2CoIII)-Co-II(nta)(2)(azpy)4(H2O)(6)]center dot[(CoCoIII)-Co-II(nta)(2)(azpy)(2)(H2O)(2)]center dot 4H(2)O (nta=nitrilotriacetate and azpy=4,4'-azobispyridine)
A novel mixed-valence (CoCoIII)-Co-II complex [(Co2CoIII)-Co-II(nta)(2)(azpy)(4)(H2O)(6)]. [(CoCoIII)-Co-II(nta)(2)(azpy)(2)(H2O)(2)]. 4H(2)O was synthesized and characterized. Its structure is composed of new motifs, called "the rod with open sidearms" anion and H-like trinuclear cation, which interlock each other. The stack of one dimensional chains of [(CoCoIII)-Co-II(nta)(2)(azpy)(2)(H2O)(2)] forms two-dimensional rhombus pores through pi-pi stacking interaction of pyridyl rings from azpy.