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4,8-Di(thien-3-yl)thieno[2,3-g:5,4-g′]bis[1]benzothiophene (8a), a member of a new class of angularly-fused thienobis[1]benzothiophenes (TBBTs), was synthesized by using a one-pot photocyclization–dehydrogenation reaction of 2,5-bis[2,2-di(thien-3-yl)ethenyl]thiophene (7a). The results of absorption and emission spectroscopy, and cyclic voltammetry studies suggest that the effective conjugation length...
Substituent effects on the spectroscopic properties of a solvatochromic compound, 7-methyl-2-phenylimidazo[1,2-a]pyrazin-3(7H)-one (1c), using derivatives 1 with a para-substituent R on the phenyl group, were investigated systematically. In the UV/visible absorption spectra, the solvatochromic property of 1 originating from hydrogen-bonding interactions was effectively regulated by the substituent...
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