Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7832135 | Acta Physico-Chimica Sinica | 2007 | 7 Pages |
Abstract
The photophysical properties of oligothiophenes-functionalized 9,9â²-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 9,9â²-spirobifluorene identical with the increased p-electron delocalization and the more effective conjugation length of the whole molecular system. The investigation on 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 9,9â²-spirobifluorene system and made every branch become an independent chromophore. The electrochemical polymerization of 6b as a representative was also investigated.
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Authors
Weihong Jin, Jing Ni, Yeehing Lai, Jian Pei,