摘要
采用后重氮偶合反应,得到一种具有荧光猝灭作用的光折变聚合物。采用核磁共振(31P-NMR和1H-NMR)、红外(IR)光谱、凝胶渗透色谱(GPC)、热重分析(TG)和差示扫描量热(DSC)对该聚合物进行表征和分析,以325nm的激发波长对该聚合物进行固体瞬态荧光发射光谱测试。结果表明,该聚合物具有良好的热稳定性,在290℃开始分解,450℃时基本分解完全。聚合物较低的分子量(-Mw=5.36×103g/mol)赋予其较低的玻璃化转变温度(Tg=39℃)。光折变聚合物在分子间形成若干大闭合环路结构,形成的自旋-轨道耦合增加了"系间窜越"的速率,使得聚合物产生迟滞荧光,并且产生荧光猝灭作用。
A photorefractive polymer with fluorescence quenching effect was synthesized by diazo-coupling reaction. It was characterized by ^31P-NMR, ^1H-NMR, IR, GPC, TG and DSC. The solid transient fluorescence emission spectrum of the polymer was tested in 325nm emission spectrum. The results show that polymer has good heat stability. It starts to decompose at 290 ℃ and decomposes completely at 450℃. The polymer has tow glass transition temperature （ Tg = 39℃） which is endowed with the low molecular weight（Mw = 5.36 × 103g/mol）. The photorefractive polymer forms several large closed loop structure between molecules. Formation of spin-orbit coupling increases the intersystem crossing rate, which produoes delayed fluorescence and the fluorescence quenching effect.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第5期13-16,共4页
Polymer Materials Science & Engineering
基金
中国工程物理研究院科学发展基金(2010B0401055)资助项目
中国工程物理研究院激光聚变研究中心创新基金(CX08201205)资助项目
关键词
后重氮偶合
荧光猝灭作用
光折变聚合物
固体瞬态荧光
迟滞荧光
diazo-coupling
fluorescence quenching effect
photorefractive polymer
solid transieflt fluorescence
delayed fluorescence
