Benzotriazole controlled unusual building blocks in two zinc complexes and their fluorescence properties

Two novel zinc coordination polymers with unusual planar hexa-nuclear zinc unit and tetranuclear zinc(II) metallamacrocycle acting as building blocks, respectively, have been successfully synthesized and characterized by elemental analysis, IR spectra and X-ray diffraction. The presences of quinolinecarboxylate ligand in both structures result in rich π–π interactions and strong blue fluorescent emissions at 400 nm and 397 nm, respectively at room temperature.