[structure: see text] A urea-containing tetraphenoxy-substituted perylene bisimide has been synthesized, and its gelation ability has been studied. This functional dye forms fluorescent organogels in toluene and tetrachloromethane through self-assembly by hydrogen-bonding and pi-pi-stacking interactions. AFM and confocal laser scanning microscopy reveal the formation of fiberlike aggregates.
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Würthner et al. (2005) studied this question.
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