Highly Stable Chiral Cadmium 1,2,4-Benzenetricarboxylate: Synthesis, Structure, and NLO and Fluorescence Properties
2006; American Chemical Society; Volume: 45; Issue: 6 Linguagem: Inglês
10.1021/ic051566x
ISSN1520-510X
AutoresLei Wang, Ming Yang, Guanghua Li, Zhan Shi, Shouhua Feng,
Tópico(s)Crystallography and molecular interactions
ResumoEmploying an unsymmetrical 1,2,4-benzenetricarboxylate as a bridging ligand, a new 3-D chiral cadmium coordination polymer [Cd2(OH)(1,2,4-BTC)] (1,2,4-BTC = 1,2,4-benzenetricarboxylate) has been prepared under hydrothermal conditions and characterized by single crystal X-ray diffraction. This compound crystallizes in the orthorhombic space group P212121, with cell parameters a = 6.900(2) Å, b = 7.404(3) Å, c = 19.116(5) Å, V = 976.5(5) Å3, and Z = 4. Its structure contains 2-D Cd−O−Cd connectivity, which is further linked by the 1,2,4-BTC ligand into a 3-D supramolecular framework. The 1,2,4-BTC ligand shows a novel and unprecedented coordination mode: nine bonds to eight metals with each carboxylate as a tridentate group. The compound exhibits intense photoluminescence at room temperature and shows distinct NLO properties. On the basis of the results of TG/DTA analyses, the structure is thermally stable up to ∼ 380 °C.
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