Macromolecules·· 21 小时前精选AI 评分58
偶氮苯含量与氨基酸间隔基调控聚丙烯酰胺共聚物的光响应与LCST行为
Counterintuitive Photoresponsiveness of Thermoresponsive Polyacrylamides: Effects of Azobenzene Content and Amino Acid Spacers
AI 导读
研究合成了四组由N,N-二甲基丙烯酰胺与带4-氨基偶氮苯（AzBn）侧基的丙烯酰胺共聚单体构成的双响应无规共聚物，侧基通过不同氨基酸间隔基连接。水溶液中，共聚物呈现受AzBn E-to-Z光异构化调控的LCST行为，浊点温度（TCP）随AzBn含量增加明显下降，在8 mol%及以上时，光致偏移达–16 °C，且在本应更极性的Z态下反而更低。
推荐理由
四组偶氮苯含量与氨基酸间隔基不同的共聚物显示，AzBn 含量主导光响应趋势，间隔基只调节局部环境。
创新点
在AzBn含量8 mol%以上时观察到反直觉现象：本应更极性的Z态浊点反而更低，光致偏移达–16 °C，并将这一趋势归因于AzBn疏水缔合形成的单链纳米颗粒。
图表、补充材料与最终表述以原文为准。阅读原文
来源：Macromolecules · doi.org
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