These three compounds all exhibit 1D Cd(II)-carboxylate chain structures. <...> In compounds I and II, Dtb are attached outside the chains as terminal ligands, while in compound III, Dtb connects two adjacent chains into a double-chain. <...> In addition, the luminescence properties of the three compounds have been investigated. <...> Keywords: coordination polymers, synthesis, structure, luminescence DOI: 10.7868/S0132344X17020049 INTRODUCTION In recent years, the field of coordination polymers (CPs) or organic-inorganic hybrid materials is very topical since the incorporation of metal ions into organic ligands offers an opportunity to provide functional materials with applications to fields as diverse as optical materials, catalysis, gas adsorption, and magnetism [1–6]. <...> In the synthesis of CPs, the key is the rational selection of metal centers and organic ligands. <...> Among various organic ligands, aromatic polycarboxyl compounds have been proven to be excellent ones for their diverse coordination modes and their ability to participate in supramolecular interactions by H-bonding and aromatic stacking [7–12]. <...> As a multidentate benzene-based double triazole ligand, 1,3-di-(1,2,4-triazole-4-yl)benzene (Dtb) can adopt versatile coordination modes, resulting in diverse CPs with interesting structures and properties. 74 H2Bdc = 1,3-benzenedicarboxylic acid, 1,4-H2Bdc = 1,4benzenedicarboxylic acid, and 1,3,5-H3Btc = 1,3,5-benzenetricarboxylic acid). <...> As a continue work of functional CPs incorporating Dtb, Cd(II) CPs containing mixed Dtb-carboxylate ligands have been favored by our group. <...> Thermogravimetric analyses (TGA) were carried out on a Perkin-Elmer TAG-7 instrument in N2 atmosphere with a heating rate of 10°C min–1. <...> The luminescent properties for the solid samples were measured on a Hitachi F-4500 fluorescent spectrometer at room temperature. <...> The mixture was heated at 160°C for 3 days and then slowly cooled down to room temperature at a rate of 3°C h–1. <...> Colorless block crystals of I were obtained in 33% yield based on Cd(II). <...> Colorless block crystals of II were obtained in 31% yield based on Cd(II). <...> Colorless block crystals of III were obtained in 45% yield based on Cd(II). <...> Single-crystal X-ray data for complexes I–III were collected on a Bruker SMART APEX II CCD diffractometer with a graphite-monochromated MoK <...>