| Abstract
| - A series of large, rigid, new, well-defined, D−π-B−A compounds with three chromophores (truxenemoieties at the core, conjugated oligothiophenes as the branch bridges, and [60]pyrrolidinofullerene (C60)segments as the end-capped groups) have been facilely developed in this contribution. Oligothiophene-functionalized truxene derivatives 1−29 are prepared by the Suzuki, the Sonogashira, and the Negishicross-coupling reactions catalyzed by Pd(PPh3)4 as well as the McMurry reaction, respectively. The 1,3-dipolar cycloaddition of the oligomers with C60 and N-methylglycine yields a new family of star-shapedD−π−B−A derivatives end-capped with pyrrolidinofullerene moieties as the active materials forphotovoltaic devices in which one, two, three, or four C60 moieties are allocated at the peripheral positionof well-defined compounds, respectively. We also investigate the UV−vis and photoluminescencebehaviors of these pyrrolidinofullerene-functionalized derivatives. The emission is obviously quenchedafter the inducement of the C60 moieties. We also observe that the emission intensity is decreased withthe increase in the number of C60 moieties.
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