Synthesis,Structure and Green Fluorescence of a Isonicotinic Coordination Polymer Containing a Silver(I) Isonicotinate Array and a Two-coordination Cadmium(II)

摘要

The selection of the metal centers and organic components plays an important role in the structural diversity.Metal centers are potential carriers of electrochemical,magnetic,catalytic,or optical properties that may be introduced into molecular materials.d~(10) metals with rich photophysical and photochemical character have focused attentions to synthesize polynuclear complexes.Three isomers of pyridine carboxylic acid,namely picolinic acid,nicotinic acid and isonicotinic acid,have been extensively investigated.Isonicotinic acid (HIso),namely 4-pyridinecarboxylate,a multifunctional chelating and/or bridging ligand,has proved to be very powerful for the construction of multi-dimensional metal-organic coordination networks.Furthermore,the isonicotinic acid complexes have raised interest in fluorescence probing with numerous potential applications for studies of microsecond diffusion and dynamics of membranes.Considering the versatile coordination abilities of HIso,we employ the ligand to coordinate with silver nitrate and cadmium acetate to fabricate a coordination complex with excellent fluorescence property.We report the synthesis,crystal structure and fluorescence property of a new silver(I) isonicotinate array {[Ag(Iso)] centre dot [Cd(Iso)_2]_(1/2)}n.