Add time:08/30/2019         Source:sciencedirect.com

Two CdII coordination polymers, namely {[Cd(L434)(Br)(N3)](H2O)1.75}n (1) and [Cd(L434)(I)(N3)(H2O)]n (2) (L434 = 3,5-bis(4-pyridyl)-4-(3-pyridyl)-1,2,4-triazole) have been synthesized by reaction of L434 with CdBr2 or CdI2 in the presence of NaN3 under the same conditions. Single-crystal X-ray diffraction analyses indicate that complex 1 shows a 3D coordination network with unusual gra topology, whereas 2 has a 1D ladder-like coordination chain. The structural distinction on the two complexes, including the different coordination environments of CdII and binding modes of L434 and N3−, can be ascribed to the usage of different halide anions from Br− to I−. In addition, the solid-state properties for complexes 1 and 2 such as thermal stability and fluorescence properties have also been investigated.

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