Syntheses,Structures,and Photoluminescence of a Novel Class of d~10 Metal Complexes Constructed from Pyridine-3,4-dicarboxylic Acid with Different Coordination Architectures

摘要

Two novel d~10 metal coordination polymers[Zn(PDB)]_n(1)and[Cd_3(PDB)_2(OH)_2(H_20)_2]n(2)(H_2PDB=pyridine-3,4-dicarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis,IR,TG analysis,and single-crystal X-ray diffraction.Crystal data for 1:C_7H_3N0_4Zn,orthorhombic Pna2_1,a=8.423(17)A,b=6.574(13)A,c=12.899(3)A,Z=4.Crystal data for 2:C_14H_12O_12Cd_3,monoclinic C2/c,a=20.130(4) A,b=6.692(13)A,c=13.081(3) A,beta=102.78(3)deg,Z=4.Both compounds exhibit novel three-dimensional frameworks.Compound 1 not only possesses a one-dimensional rectangular channel but also contains infinite double-stranded helical chains.Compound 2 has two different types of channels,one being built up from pyridine rings and{Cd0_5N}and{Cd0_6}building units and the other being constructed from pyridine rings and{Cd0_5N}building units.Furthermore,both compounds show strong photoluminescence properties at room temperature.