Synthesis and characteristics of a novel 3-D organic amine oxalate: (enH(2))(1.5)[Bi-3(C2O4)(6)(CO2CONHCH2CH2NH3)center dot 6.5H(2)O

摘要

A novel 3-D compound of (enH(2))(1.5)[Bi-3(C2O4)(6)(CO2CONHCH2CHNH3)]center dot 6.5H(2)O has been hydrothermally synthesized and characterized by IR, ultraviolet-visible diffuse reflection integral spectrum (UV-Vis DRIS), fluorescence spectra. TGA and single crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C-2/c with a = 3 1.110(8)angstrom, b = 1.544(3) angstrom, c = 22.583(6) angstrom, beta = 112.419(3)degrees, V = 7497(3) angstrom(3), Z = 8, R-1 = 0.0463 and wR(2) = 0. 1393 for unique 7686 reflections I > 2a(I). In the title compound, the Bi atoms have eight-fold and nine-fold coordination with respect to the oxygen atoms, with the Bi atoms in distorted dodecahedron and monocapped square antiprisin, respectively. The 3-D framework of the title compound contains channels and is composed of linkages between Bi atoms and oxalate units, forming honeycomb-like layers with two kinds of 6 + 6 membered aperture, and pillared by oxalate ligands and monamide groups. The channels have N-ethylamine oxalate nionamide group -CO2CONHCH2CH2NH3+, which is formed by the in situ reaction of en and oxalate acid. At room temperature, the complex exhibits intense blue luminescence with all emission peak at 445 nm. (c) 2005 Elsevier Inc. All rights reserved.