Synthesis, Characterization, And Properties Of Rhenium(Ⅰ) Complexes With Phenanthroline Derivatives

Phenanthroline and its derivation has been investigated as a ligand of coordination compounds because of its unique structure and properties. As a bidentate ligand containing of three benzene rings, it can coordinate with metal ions and form the complexes, which have been applied in optical material, fluorescence material, magnetic material. The derivatives of phenanthroline have more advantages than phenanthroline as ligands, thus gaining much wide attention.In this paper, we use1,10-phenanthroline’s derivative as ligand of coordination complexes, and study its physical and optical properties. The research results are listed as follows:1. Three Re(I) complexes of Phen-Re, IDIMPhen-Re and PNPh-Re were synthesized, and the block copolymer of PS-b-PMAA(PNPh-Re) which containing Re(I) metal ion was synthesized. Their structures were identified by NMR, IR, MS and so on.2. Experimental results indicate that the three Re(I) complexes appeared the characteristic absorption peak of the rhenium complex at the round390nm and the characteristic phosphorescence emission from3MLCT excited state except the PNPh-Re. But a special launch behavior of the PNPh-Re that the fluorescence spectrum exhibited a red shift with the increase excitation wavelength has been found, this is because of the configuration of PNPh changes between the ground state and excited state.3. Density functional theory (DFT) was used to optimize the ground state and excited state structures of the complexes IDIMPhen-Re and PNPh-Re using the6-31G basis set. Based on their geometric structures, the absorption spectra were calculated using time dependent DFT (TD-DFT) with the same basis set.4. The polymer of PS-b-PMAA(PNPh-Re) and the Re(I) complex have the same photo-physical properties. It is found that the composition of block polymer have a significant effect on self-assembled morphology of the gas-liquid interface, when there is a large proportion of the hydrophilic segments in the polymer chain, a hollow tubular aggregates has been observed.