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Citation: JIN Wei-Hong, NI Jing, LAI Yee-Hing, PEI Jian. Photophysical Properties and Electropolymerization of Regioregular Head-to-Tail Oli thiophenes-Functionalized 9,9'-spirobifluorene Derivatives[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 459-465. doi: 10.1016/S1872-1508(07)60030-8 shu

Photophysical Properties and Electropolymerization of Regioregular Head-to-Tail Oli thiophenes-Functionalized 9,9'-spirobifluorene Derivatives

1.
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China; Institute of Materials Research and Engineering, and Department of Chemistry, National University of Singapore, Singapore 117602, Singapore; College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316004, Zhejiang Province, P. R. China

Received Date: 13 November 2006
Available Online: 23 March 2007

The photophysical properties of oli thiophenes-functionalized 9,9'-spirobifluorene derivatives in solution and in solid state were investigated in detail. The enhanced red-shift was observed from the absorption and the photoluminescence (PL) spectra of these derivatives in dilute THF solution with the increase of thiophene unit at one branch of 9,9'-spirobifluorene identical with the increased π-electron delocalization and the more effective conjugation length of the whole molecular system. The investigation of the photophysical properties of these compounds further demonstrated that the sp3-hybrid carbon at the spiro-center completely obstructed the correlation between two branches of the 9,9'-spirobifluorene system and made every branch become an independent chromophore. The electrochemical polymerization of 6b as a representative was also investigated.
- Oli thiophene; 9,9-Spirobifluorene; Photophysical property; Electrochemical polymerization
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