A novel chain-like molybdenum phosphate: hydrothermal synthesis, crystal structure and characterization of [NH_3(CH_2CH_2)_2NH_3]_3[NH_3(CH_2CH_2)_2NH_2]Na_5[Mo_6O_12(OH)_3(PO_4)(HPO_4)_3]_2·4H_2O

摘要

A novel organic/inorganic hybrid molybdenum phosphate, [NH_3(CH_2CH_2)_2NH_3]_3[NH_3(CH_2CH_2)_2NH_2]Na_5[Mo_6O_12(OH)_3(PO_4)(HPO_4)_3]_2·4H_2O (1), involving molybdenum presented in V oxidation, has been hydrothermally prepared and characterized by elemental analysis, i.r., u.v.vix., x.p.s., t.g. and single crystal X-ray diffraction. The structure of the title compound (1) may be considered to consist of two [Mo_6O_12(OH)_3(PO_4)(HPO_4)_3] units bonded together with NaO_6 octahedra, forming dimers. Further, these dimers connect with each other through four Na~+ cations as bridges, giving rise to novel one-dimensional chain-like skeleton. Piperazines exist among inorganic chains acting as charge balancing cations.