Structures, luminescence and photocatalytic properties of two nanostructured cadmium(II) coordination polymers synthesized by sonochemical process

Abstract

By varying the dicarboxylate coligands, two nano-sized cadmium(II) coordination polymers (CPs), [Cd(bix)(DCTP)]n (1) and [Cd(bix)2(BPDC)]n (2) (bix=1,4-bis(imidazol-1-ylmethyl)benzene, H2DCTP=2,5-dichloroterephthalic acid, H2BPDC=biphenyl-4,4′-dicarboxylic acid) were synthesized hydrothermally and sonochemical irradiation. CPs 1–2 and their nanostructures have been characterized by elemental analysis, single-crystal X-ray diffraction, and scanning electron microscopy (SEM). CP 1 features a uninodal 4-connected 2D sql network consisting of two different helical arrays. Whilst, CP 2 displays 2D layer which constructed by the linear chains and M2L2 type discrete loops. The effect of ultrasonic power and temperature on the morphology and size of CPs 1–2 are investigated in detail. Nano-sized 1–2 show the relatively high photocatalytic performance for degradation of Methylene Blue (MB) under UV irradiation.