Alternating conjugated and transannular chromophores: tunable property of fluorene-paracyclophane copolymers via transannular pi-pi interaction |
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| Authors: | Wang Weiling Xu Jianwei Lai Yee-Hing |
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| Institution: | Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543. |
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| Abstract: | structure-see text]A series of fluorene-dithia3.3]paracyclophane copolymers was synthesized by Suzuki coupling reactions of suitable precursors. Transannular pi-pi interactions altered the electronic and optical properties of the polymer backbone significantly. A large red shift in the emission spectrum of the unsubstituted polymer was accompanied by enhanced photoluminescence (PL) efficiency. Substitution in the cyclophane unit resulted in PL quenching. |
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