A series of entangled Cd(II) coordination polymers assembled from different dicarboxylate acids and a flexible imidazole-based ligand

作者：Mu Ya Juan^*; Xie Ji Xing; Ran Yun Gen; Han Bo; Qin Gui Fang

来源：Polyhedron, 2015, 89: 20-28.

DOI：10.1016/j.poly.2014.12.029

• Entangled coordination polymers
• Dicarboxylate acids
• Flexible imidazole-based ligands
• Photoluminescent properties
• Cd(II) coordination polymers

In order to tune the architectures of Cd(II)-bmimx coordination polymers (bmimx = 1,4-bis(2-methylimidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene), four dicarboxylate ligands, succinic acid (H(2)suc), 1,4-benzenedicarboxylic acid (H(2)bdc), 4,4'-sulfonyldibenzoic acid (H(2)sdba) and 4,4'-carbonyldibenzoic acid (H(2)cba), have been employed as co-ligands, and four new coordination polymers with different entangled modes, namely {[Cd(bmimx)(suc)]center dot 2H(2)O)(n) (1), [Cd(bmimx)(bdc)(H2O)](n) (2), [Cd(bmimx)(sdba)](n) (3) and {[Cd(bmimx)(cba)center dot 8H(2)O)(n) (4), have been synthesized and characterized. Complexes 1 and 2 show the dia topology with the 4- and 5-fold interpenetrating modes, respectively. Complexes 3 and 4 exhibit different 2D + 2D -> 3D polycatenated networks via Hopf links, respectively. A comparison of these structures reveals that the backbones of the dicarboxylate ligands play important roles in controlling the entangled modes of the coordination polymers. Furthermore, the thermal stabilities and the photoluminescence of 1-4 have also been investigated.

• 出版日期2015-3-29
• 单位河北大学