Synthesis, Crystal Structure, Properties Of Complexes Based On Imidazole And Thiazole Derivatives

Imidazole and thiazole derivatives are important nitrogen-containing heterocycliccomplexes, which can be used as bidentate or polydentate ligands to synthetisefunctional metal complexes with metal-salt. These metal complexes have good π-πconjugation and good donor character, so they have good application prospect inbiological activity, magnetism, catalysis, chemical sensors and light emitting materialsetc.In this paper, a series of Cu（Ⅰ） complexes、 Cd（Ⅱ）、 Ni（Ⅱ）、 Zn（Ⅱ） andMn（Ⅱ）complexes were synthesized. The crystal structures of their complexes werecharacterized by elemental analysis,1H NMR, X ray diffraction analyses, theirluminescent properties were studied by UV-vis spectra, fluorescence spectra, and thequantitative calculation and so on. The main works are as follows:1. Cu（Ⅰ） complexes:[CuL1（PPh₃）₂][BF₄]（1）、[CuL2（PPh₃）₂][BF₄]（2）、[Cu₂（L3）₂（PPh₃）₂][BF₄]₂（3） were synthesized with imidazole derivative （L1、L2、L3）.The Cd （Ⅱ） complex （4） was synthesized with2-（2’-pyridyl） benzimidazole （L2）.Cu （I） complexes maximum emission are mainly concentrated in the623-680nm. TheCd （Ⅱ） complex shows emission maxima in the blue region.2.2-（2-hydroxyphenyl） benzimidazole （L4） was synthesized with salicylic acidand o-diaminobenzene under the catalysis of poly phosphoric acid （PPA）. Ni（Ⅱ）、Cd（Ⅱ）、Ni（Ⅱ） and Zn（Ⅱ） complexes were synthesized with2-（2-hydroxyphenyl）benzimidazole （L4）. The Ni（Ⅱ） complex （5） can be used as magnetic materials.3.2-（2-pyridyl） benzothiazole （L5） was synthesized with2-pyridine carboxylicacid and o-aminothiophenol under the catalysis of poly phosphoric acid （PPA）. Cu（Ⅰ）（6）、 Cd（Ⅱ）、 Ni（Ⅱ） and Zn（Ⅱ） complexes were synthesized with2-（2-pyridyl）benzothiazole （L5）. Their luminescent properties were studied.