Chiral metal gallophosphates templated by achiral triamine: Syntheses and characterizations of A[Mn(H2O)(2)Ga(PO4)(2)](3) and A[Zn3Ga(PO4)(4)]center dot H2O (A = H(3)DETA)

Two new transition-metal gallophosphates, (H(3)DETA)[Mn(H2O)(2)Ga(PO4)(2)](3) (1) and (H(3)DETA)[Zn3Ga(PO4)(4)].H2O (2) (DETA = NH2(CH2)(2)NH(CH2)(2)NH2), have been synthesized under mild hydrothermal conditions and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and magnetic susceptibility data. They are the first transition-metal gallophosphates that adopt chiral frameworks with achiral triamine templates. Both can be prepared in pure chiral forms. The structure of 1 consists of octahedra of MnO4-(H2O)(2) and tetrahedra of GaO4 and PO4 to form a three-dimensional 4-connected polyhedral network in CZP topology. The most interesting feature lies in the fact that the structure is well-sustained with all water ligands removed from the octahedral Mn2+ centers. The dehydration-hydration process for the coordination water is reversible. On the basis of TG analysis, material 1 can be thermally stable up to approximate to300 degreesC. Material 2 is built up with tetrahedra Of MO4 (M = Zn and Ga) and PO4 and crystallizes in the UCSB-7 structure type. It has the highest transition-metal-to-gallium ratio among MGaPOs. Crystal data: 1, orthorhombic, C222(1), alpha = 10.0390(6) Angstrom, b = 17.389(1) Angstrom, c = 16.7356(9) Angstrom, Z = 4; 2, cubic, 14(1)32, a = 17.9192(6) Angstrom, z = 12.