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摘要
Hydrothermal reaction of 1,2,4-triazole with CdCl2 center dot 2.5H(2)O generated a 3-D metal-organic framework, {[Cd3Cl2(Trz)(4)]center dot H2O}(n) (1) (Trz 1,2,4-triazole), which was characterized by elemental analysis, FT-IR, X-ray powder diffraction, X-ray single-crystal diffraction, TG/DTA, and photoluminescence measurements. Compound 1 crystallizes in the orthorhombic system, space group Pnma, a = 16.906(3) angstrom, b = 8.3151(17) angstrom, c = 13.080(3) angstrom, V = 1838.6(6) angstrom(3), Z = 4. Cd(1) is coordinated by four nitrogen atoms and one chloride to form a distorted trigonal-bipyramidal geometry. Cd(2) is an octahedron defined by four triazole nitrogen atoms and two chlorides. Two Cd(2) and one Cd(1) are linked by mu(3)-Cl(1) to give a [Cd3Cl] cluster, which is connected by mu(2)-Cl(2) to generate a 1-D inorganic chain. The 1-D inorganic chains are extended by mu(3)-Trz to form a 2-D hybrid layer in the b, c-plane, which is ultimately linked by residual triazole ligands to give a 3-D framework. The [Cd3Cl] clusters and the Trz ligands can be regarded as 9- and 3-connected nodes, which lead to an unusual (3,9)-connected net with Schlafli symbol of (4(23) center dot 6(13))(4(3)). The solid 1 exhibits high thermal stability and shows strong blue fluorescence emission at 410 nm in the solid state at ambient temperature.
- 出版日期2012
- 单位陕西师范大学
