Abstract
Electroabsorption spectra of electron donating butyloxy- (OBu) or electron withdrawing butylsulfonyl (SO(2)Bu)-substituted tribenzotetraazachlorin (TBTAC)-C(60) conjugates (1 and 2, respectively) have demonstrated that significant change of the molecular polarizability is associated with the photoexcitation of 1 in the lower energy region, while that in the higher energy region is comparable with the corresponding band of 2, although the pi-aromatic structures of 1 and 2 are identical to each other, being consistent with the previously reported result of the DFT calculations.
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