Shedding Light on Structure鈥揚roperty Relationships for Conjugated Microporous Polymers: The Importance of Rings and Strain

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• 作者：Martijn A. Zwijnenburg ; Ge Cheng ; Tom O. McDonald ; Kim. E. Jelfs ; Jia-Xing Jiang ; Shijie Ren ; Tom Hasell ; Fr茅d茅ric Blanc ; Andrew I. Cooper ; Dave J. Adams
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：October 8, 2013
• 年：2013
• 卷：46
• 期：19
• 页码：7696-7704
• 全文大小：358K
• 年卷期：v.46,no.19(October 8, 2013)
• ISSN：1520-5835

文摘

The photophysical properties of insoluble porous pyrene networks, which are central to their function, differ strongly from those of analogous soluble linear and branched polymers and dendrimers. This can be rationalized by the presence of strained closed rings in the networks. A combined experimental and computational approach was used to obtain atomic scale insight into the structure of amorphous conjugated microporous polymers. The optical absorption and fluorescence spectra of a series of pyrene-based materials were compared with theoretical time-dependent density functional theory predictions for model clusters. Comparison of computation and experiment sheds light on the probable structural chromophores in the various materials.