Abstract

Two-dimensional coordination polymers, [M(C 8H 12O 4)(C 10H 8N 2)]·H 2O [M = Co ( 1), Cd ( 2); C 10H 8N 2 = 4,4-bipyridine, C 8H 14O 4 = subaric acid] were obtained from the reaction of the metal salts, bipy and subaric acid at 180 °C and characterized by elemental analysis, infrared spectrum, and single-crystal X-ray diffraction and surface photovoltage spectrum (SPS). The single-crystal X-ray diffraction showed that the subaric ligand in the two complexes exhibits two types of modes coordinating to transition metal ions, resulting in the formation of a 1D infinite chain along the c-axis. In addition, the results of SPS for complexes 1 and 2 indicate that these two complexes exhibit positive surface photovoltage responses in the range of 300–800 nm, which can be assigned to LMCT and MLCT, respectively. And the SPS of complex 1 also can be assigned to the d → d* electronic transition. The SPS spectra of the two complexes are consistent with their UV–vis spectra.

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