水溶性聚合物和两亲聚合物23.两亲聚合物PAMC16S对螺(噁)嗪化学和物理行为的影响

研究了两亲聚合物聚 (2 -丙烯酰胺基十六烷磺酸 ) (PAMC16S)存在下 1 -乙基 -3 ,3 -二甲基螺 吲哚啉 -萘并口恶嗪 ](SO -E)在水溶液中的增溶作用及PAMC16S对SO -E化学和光化学性质的影响。PAMC16S明显增加了SO -E在水相的溶解性 ,SO -E的最大增溶浓度随PAMC16S浓度增加呈线性增加规律。在PAMC16S存在下 ,新配制的SO -E溶液显示可逆的光致变色性 ,显色体呈红色 ,最大吸收峰位于 5 2 0nm ,在室温下的消色反应速度明显慢于无PAMC16S存在下的兰色显色体。SO -E/PAMC16S溶液是不稳定的 ,配制后较长时间即失去SO -E的正常光致变色性质。盐酸具有与PAMC16S相似的作用 ,SO -E/PAMC16S体系的不稳定性可用氨水中和的方法解决。1H -NMR结果表明SO -E在酸性介质中发生了不可逆的化学反应。

Water-soluble and Amphiphilic Polymers 23. Effects of Amphiphilic Polymer PAMC16S on Chemical and Physical Behaviors of Spirooxazine

The solubilization of 1 ethyl 3,3 dimethylspiroindoline naphthoxazine] (SO E) in aqueous solution in the presence of an amphiphilic polymer, poly(2 acrylamidohexadecanesulfonic acid) (PAMC 16 S), and its effects on chemistry and photochemistry of SO-E were studied. The solubilization of SO-E is greatly improved by PAMC 16 S. The maximum solubilized concentration of SO-E increases linearly with the increase of PAMC 16 S concentration. In the presence of PAMC 16 S, the reversible photochromism takes place for the newly mixed solutions of SO-E, and the red colored form with maximum absorption at 520 nm exhibits much slower color decay at room temperature than the blue colored form without PAMC 16 S. The SO-E/ PAMC 16 S solution is unstable, and the normal photochromic property of SO-E disappears when the solution is kept for a longer time. The presence of HCl has the same effect as PAMC 16 S, and the unstability of SO-E/ PAMC 16 S system can be solved by neutralization with aqueous ammonia. 1 H-NMR results indicate that there exist irreversible chemical reactions when SO-E is in an acidic medium.