物理化学学报 >> 1992, Vol. 8 >> Issue (02): 186-190.doi: 10.3866/PKU.WHXB19920209

研究论文 上一篇    下一篇

稀溶液中环型聚苯乙烯的激基缔合物荧光效应

朱端慧; 李春荣; 梁树森; 韩学军; 张芳; 黄家贤   

  1. 南开大学化学系,天津 300071
  • 收稿日期:1990-10-10 修回日期:1991-02-14 发布日期:1992-04-15
  • 通讯作者: 黄家贤

The Fluorescent Effect of Ring-Shaped Polystyrene Excimer in Dilute Solution

Zhu Duan-Hui; Li Chun-Rong; Liang Shu-Sen; Han Xue-Jun; Zhang Fang; Huang Jia-Xian   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1990-10-10 Revised:1991-02-14 Published:1992-04-15
  • Contact: Huang Jia-Xian

摘要: 采用乙酸乙酯为环型和线型聚苯乙烯的非良溶剂, 确定了Mark-Houwink方程分别为[η]_r=1.91×10~(-2)·M~(0.607)和[η]_l=4.06×10~(-2)·M~(0.572)。研究了环型和线型聚苯乙烯的激基缔合物的荧光效应。通过稀溶液中环型和线型高分子线团在柔顺性上存在着差异, 解释了二者之间在荧光效应方面的差异, 并根据实验结果,确定了(I_E/I_M)c→0~M关系式分别为(I_E/I_M)r,c→0=1.91+3.40×10~(-6)M和(I_E/I_M)l,c→0=2.15+3.05×10~(-6)M。

关键词: 环型聚苯乙烯, 线型聚苯乙烯, Mark-Houwink方程, 激基缔合物, 荧光效应

Abstract: Mark-Houwink equations of ring-shaped and linear polystyrene in ethyl acetate were obtained as:
[η]_r=1.91×10~(-2)·M~(0.607) and [η]_1=4.06×10~(-2)·M~(0.572).
The excimer fluorescent effect of the ring-shaped and linear polystyrene was studied. According to the difference of flexibility between ring-shaped and linear polymer coils in their dilute solution formed by not good solvent the difference of the excimer effect between them may be interpreted. Two correlation linear equations concerning to the (I_E/I_M)_(c→0) versus molecular weight of the samples were obtained.
(I_E/I_m)_(r,c→0)=1.91+3.40×10~(-6)·M
and (I_E/I_m)_(l,c→0)=2.15+3.05×10~(-6)·M

Key words: Ring-shaped polystyrene, Linear polystyrene, Mark-Houwink equation, Excimer, Fluorescent effect