TY - JOUR
T1 - Chiral metal gallophosphates templated by achiral triamine
T2 - Syntheses and characterizations of A[Mn(H2O)2Ga(PO4)2]3 and A[Zn3Ga(PO4)4]·H2O (A = H3DETA)
AU - Lin, Chia Her
AU - Wang, Sue Lein
PY - 2002
Y1 - 2002
N2 - Two new transition-metal gallophosphates, (H3DETA)[Mn(H2O)2Ga(PO4) 2]3 (1) and (H3DETA)[Zn3Ga(PO4)4] ·H2O (2) (DETA = NH2(CH2)2NH(CH2) 2NH2), 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 transitionmetal 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 ≈300 °C. 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, C2221, a = 10.0390(6) Å, b = 17.389(1) Å, c = 16.7356(9) Å, Z = 4; 2, cubic, 14132, a = 17.9192(6) Å, Z = 12.
AB - Two new transition-metal gallophosphates, (H3DETA)[Mn(H2O)2Ga(PO4) 2]3 (1) and (H3DETA)[Zn3Ga(PO4)4] ·H2O (2) (DETA = NH2(CH2)2NH(CH2) 2NH2), 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 transitionmetal 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 ≈300 °C. 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, C2221, a = 10.0390(6) Å, b = 17.389(1) Å, c = 16.7356(9) Å, Z = 4; 2, cubic, 14132, a = 17.9192(6) Å, Z = 12.
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U2 - 10.1021/cm010421v
DO - 10.1021/cm010421v
M3 - Article
AN - SCOPUS:0036124141
SN - 0897-4756
VL - 14
SP - 96
EP - 102
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 1
ER -