SYNTHESIS AND STRUCTURE OF TWO NOVEL METAL-ORGANIC FRAMEWORKS BASED ON CLUSTER ANIONS [Re6Se8(CN)6]4–, CATIONS Tb3+, AND ISONICOTINATE ANIONS

The interaction of cluster anions [Re6Se8(CN)6]4– with cations Tb3+ in the presence of 4-cyanopyridine in aqueous solution is studied. Two novel framework compounds (K[{Tb3(H2O)2}(ina)2}{Re6Se8(CN)6}2]·7H2O (1) and [{Tb4(OH)4(μ-ina)2(ina)2(H2O)4}{Re6Se8(CN)6}]·7.5H2O (2) where ina = isonicotinic acid anion) are prepared by the solvothermal synthesis as a result of 4-cyanopyridine hydrolysis to produce isonicotinic acid and subsequent self-assembly in solution with cations Tb3+ and a presynthesized cluster anion [Re6Se8(CN)6]4–.