Synthesis, Crystal Structure, and Physical Properties of a ­Barium(II) Benzene‐1, 2, 3‐tricarboxylic Acid Complex

A coordination polymer [Ba12(btc)8(H2O)23] (1) was obtained by self-assembly of the corresponding metal carbonate with benzene-1, 2, 3-tricarboxylic acid ligand (H3btc), and its structure was determined by single-crystal X-ray diffraction studies. The results revealed that complex 1 has a three dimensional structure. In 1, the btc3– anions adopt four different conformation and coordination modes. Bridging btc3– anions and μ2-bridging water molecules connect BaII ions to generate a two dimensional layer. Further, μ2-bridging coordinated water molecules connect the BaII ions of neighboring layers to form a three dimensional structure. Additionally, the luminescent property and thermal stability of 1 were investigated.