本工作分别合成了外围修饰一个芘基团和核心修饰一个芘基团两个系列的芳醚树枝形聚合物Py-Gn-OH和Gn-CH2-Py(n=1～4).Py-Gn-OH和Gn-CH2-Py的发光随代数增加而增强,荧光寿命增加.荧光猝灭实验结果表明,树枝形聚合物Py-Gn-OH和Gn-CH2-Py的双分子猝灭速率常数均随代数增加而减小,表明树枝形聚合物发生了构象折叠,位于核心和外围的芘基团均被树枝形聚合物骨架包裹,随代数增加树枝形聚合物骨架增大,对芘基团包裹作用增强,导致猝灭剂接近芘基团的位阻增大.Gn-CH2-Py体系的双分子猝灭速率常数均比相应代数Py-Gn-OH体系略小,说明树枝形聚合物骨架对连接在核心的芘基团的包裹程度比对连接在外围的芘基团略强.本工作为新型功能芳醚树枝形聚合物设计和应用提供了参考.
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