| Research Abstract |
9-(4-N, N-Dimethylaminophenyl)phenanthrene (DMA-Phen ; DP), in which N, N-dimethylaniline (DMA) and phenanthrene (Phen) are linked directly by a single bond, shows an intense and structureless intramolecular charge-transfer (ICT) fluorescence. We have been interested in this compound DP as a new florescence probe because of its strong solvatochromism and have studied polymer microenvironments with using DP as an intramolecular fluorescence probe. In this project temperature-induced volume phase transitions of hydrogels prepared from acrylamide derivatives and their microenvironments have been studied by using the fluorescence probe technique. The results in this study are as follows.
1.DP-labeled poly(N-isopropylacrylamide)(PNIPAM) hydrogels were prepared under various experimental conditions and temperature-induced phase transitions and microenvironments of them were studied by fluorescence probe technique.
2.Some DP-labeled acrylamide polymer gels such as PNIPAM, poly(N, N-diethylacrylamide)(PDEAM), poly(N-isopropylmethacrylamide) (PNIPMAM), and poly(N, N-dimethylacrylamide) (PDMAM), were prepared and their temperature-induced phase transitions and microenvironments were compared with each other.
3.DP-labeled NIPAM copolymer hydrogels with methyl methacrylate, DMAM, N-n-propylacrylamide, and NIPMAM were prepared. Thermo-responsive behaviors and microenvironments of copolymer gels were compared with each other.
|
