Synthesis And Properties Of N2-substituted1,2,3-triazole And Complexes

The selectively synthesis of N2-substituted-1,2,3-triazoles and the complexes basedon its reaction with zinc and various copper salts in difference conditions were the mainwork of this dissertation. Four new complexes were obtained by the new type ofN2-substituted-1,2,3-triazole ligand (2-((4-phenyl-2H-1,2,3-triazol-2-yl) methyl) pyr-idine).And their formulas were shown as followed:[Cu2(ptmp)2(CH3CN)]Cl4(1)、[Cu(ptmp)](NO3)2(2)、[Cu(H2O)(ptmp)](SO4)2(3)、[Zn(ptmp)2N3]ClO4(4). All of the fourcompounds were fully characterized by nuclear magnetic resonance, infrared spectroscopyand single crystal X-ray diffraction.N-alkyl conducted on NH-1,2,3-triazoles was a principal method of the synthesis ofN2-substituted-1,2,3-triazoles. The first step is the synthesis of nitro alkenes based on thereaction of benzaldehyde and nitromethane. The second step consists the synthesis ofNH-1,2,3-triazole conducted between nitro alkenes and sodium azide. We are going tointroduce a bromine atom into4-phenl-1,2,3-triazole to increase the selectivity of N2.The coordination polymers were obtained by diffusion method and naturalvolatilization method separately. Complex1was a1-dimensional chain structure, of whichthe crystals belongs to the monoclinic system, with space group P2(1)/c. The crystals ofcomplex2belong to the Triclinic, with space group P-1.. Analyzed by circular dichroismspectrum, the complex3is a single chiral compound along the crystallographic a axis. Thestructure of complex4consists of a zigzag single chain connected by azide anion in aμ2-azido-bridged pattern along the crystallographic c axisWe discovered that the fluorescence of ptmp was stronger in methanol, and it had abetter selectivity to zinc and copper anion. And the fluorescence became stronger whenzinc aion were added into the solution of ptmp, while the opposite phenomenon occurredwhen the copper aino were added into it. The study of solid fluorescence of the complexesand ligand found that the fluorescence of complex1,2and3nearly quenched, but the fluorescence intensity of complex4is enhanced compared to the ligand.