Fluorescence Studies on Thermo-responsive Behavior and Microenvironment of Poly(N-alkylacrylamide) Gels

聚(N-烷基丙烯酰胺)凝胶热响应行为和微环境的荧光研究

基本信息

批准号：
10650867
负责人：
IWAI Kaoru
金额：
$ 0.26万
依托单位：
Nara Women's University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

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.

9-（4-N，N-二甲基苯基）菲（DMA-PHEN; DP），其中N，N，N-二甲基苯胺（DMA）和稳态（PEN）直接通过单个键直接连接，显示出强烈且无结构的无分子电荷转移（ICT）荧光。我们对这种化合物DP的感兴趣是一种新的荧光探针，因为它具有很强的溶剂化色素，并研究了使用DP作为分子内荧光探针的聚合物微环境。在该项目温度引起的体积相变的体积相变的水凝胶的体积过渡是通过使用荧光探针技术研究了丙烯酰胺衍生物及其微环境的。这项研究的结果如下。1。dp标记的聚（N-异丙基丙烯酰胺）（PNIPAM）水凝胶在各种实验条件下制备，并通过荧光探针技术进行了温度诱导的相变和微环境。准备N-二甲基丙烯酰胺），n-二甲基丙烯酰胺（PDEAM），多（N-异丙基甲基丙烯酰胺）（PNIPMAM）和聚（N，N，N-二甲基丙烯酰胺）（PDMAM）（PDMAM），并将其温度诱导的相过渡和微环境与彼此相比。制备了N-N-N-丙烯酰胺和NIPMAM。比较共聚物凝胶的热反应行为和微环境。