Hydrothermal Synthesis and Crystal Structure of a Microporous Gallophosphate with 12-Membered Ring Channels:Ga_9(PO_4)_(12)(H_3TREN)(H_2TREN)_3·xH_2O

摘要

An open-framework gallophosphate, Ga9（PO4） 12[（H3TREN）（H2TREN）3]·xH2O was hydrothermally synthesized at 453 K with tris（2-aminoethyl） amine（TREN） as the organic template and characterized by single-crystal X-ray diffraction. Ga9（PO4） 12[（H3TREN）（H2TREN）3]·xH2O crystallized in a cubic space group I43m, with a=1.68552（3） nm and Z=2. The structure contains 12-membered ring channels and supercages of 1.434 nm in diameter, and is an analogue of Al9（PO4） 12（C 24H 91N 16）·17H2O. Template-TREN in the supercage was different from triethylenetetraamine（TETA） used in the initial reaction mixture due to the construction transformation. The TETAs transformed into the TRENs due to the low interaction energy between the template and framework. We verified it via energy calculation and liquid state NMR.