1,10 - Phenanthroline Derivative Ligand Building Their Metal Complexes Based Study

In this article, three complexes, namely DDIP, Dppp3, L4, have been synthesizedby thiourea,3,4-diaminopyridine, and3,5-dibromo-4-hydroxybenzaldehyde reactedwith1,10-phenanthroline-5,6-dione respectively. Single crystal of DDIP obtained bysolvent evaporation. In the synthesis of three compounds as ligands,2,3-pyridinedicarboxylic acid, terephthalic acid and phthalic acid as subsidiary ligands, withtransition metal ions under solvothermal conditions yield nine new coordinationpolymers.[(C₇H₃NO₄)·(pdon)·Cd·(H₂O)₃]_n(1),[(HIPT)·(1,4-bdc)·Zn·H₂O]_n(2),[(Dppp3)·(1,4-bdc)·M·H₂O]_n[M=Cd(3,9), Zn(5)],[(Dppp3)·(1,4-bdc)·M]_n[M=Cu(4),Co(6)],[(L4)·(1,4-bdc)·Cd]_n(7),[(Dppp3)₂·(1,2-bdc)·Zn]_n(8). Elemental analysis andX-ray single crystal diffraction and TG and IR were carried out for these ninecomplexes. Fluorescence property of2,8were also researched.The molecular structures of DDIP and19were determinated by X-ray singlecrystal diffraction analysis. Because of the hydrogen bond, DDIP formed threedimensional network structure in space. The structures of complexes1,2,3,5,9were1D chains; Complexes4,6were planar structures; Complex7has three dimensionalnetwork; Structure of complex8was zero dimension.TG analysis for the complexes are in good agreement with there structures. DDIPwas take place molecule dehydration reaction easily to generate structure which hasconjugate plane (HIPT). Fluorescent analysis showed that complex2emit greenfluorescence, complex8emit yellow-green fluorescence.