We presented here several examples of the synthesis of cyclic functional polymers by utilizing of the copper-catalyzed azide�alkyne cycloaddition (CuAAC) �click� reaction. The results indicated that the Tg of the cyclic polymer were higher than the respective linear precursors, due to the lower entropy ?S and absent of end-group of a cyclic polymer. The fluorescence emission intensity was dramatically enhanced when the linear polymers containing fluorescence chromophores were converted to their cyclic analogues. The obtained cyclic polymers bearing azobenzene groups at either main chain or side chain showed a better trans�cis�trans photoisomerization ability than the corresponding linear polymers, resulting in a deeper surface modulation depth and a higher birefringence.Acknowledgments:  National Natural Science Foundation of China (Nos. 21234005, 21074080) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) are gratefully acknowledged.

Cyclic polymer: Synthesis and performance

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.