Synthesis, Crystal Structure and Properties of Barium Coordination Compound Based on 1,3,5-Benzenetricarboxylic Acid Ligand

摘要

A new coordination polymer [Ba3(btc)2(H2O)8]·2H2O(1, H3 btc = 1,3,5-benzenetricarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy analysis. All carboxylate oxygen atoms of btc3-participate in coordination with the central Ba(Ⅱ) ions. The Ba(1) center is eight-coordinated with a distorted square antiprismatic coordination geometry, while the Ba(2) ion is ten-coordinated with a distorted dicapped square prism. Three carboxyl groups of the anion btc3- take μ2-η1:η1 and μ2-η2 :η1 coordination modes, respectively. The whole btc3- anion acts as a μ6-bridge connecting six different Ba(Ⅱ) ions to form a 3D framework structure. Luminescent and thermal stable properties of complex 1 were investigated.