Amphiphilic Re (i) Complexes Synthesis And Interface Aggregation Behavior

In this thesis, we concentrated on synthesizing a series of novel ainphiphilic Re(I) complex, and investigating the influence of photoisomerization of the photosensitive ligand of the complexes to their aggregation behaviors at the air/liquid interface and in the LB films. Through introducing a photosensitive ligand that could undergo photoisomerization when irradiated with UV light, we synthesized a series of novel amphiphilic Re(I) complexes. To the complex that bears a hexadecyl group, we investigated its photophysical properties in solution. The UV-vis and fluorescence spectra before and after UV light irradiation showed that the photoisomerization caused essential influence on the Metal to Ligand Charge Transfer (MLCT) of the complex. We also discovered that the amphiphilic complex formed aggregates at the air/liquid interface, and UV irradiation caused little effect on the aggregation behavior. FT-JR spectra showed that Re(I) complex molecules are highly ordered in LB films and UV irradiation made them even more ordered. We used Scanning Force Microscope (SFM) to characterized the aggregation morphology of Re(I) in LB films. The results demonstrated that the LB monolayer surface is very smooth, but changed to aggregation after UV irradiation. Compared with the morphology change of cast films, we concluded that the morphology change in LB films was due to molecular aggregation induced by photoisomerization of the photosensitive ligands.