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- W2137385215 endingPage "9835" @default.
- W2137385215 startingPage "9824" @default.
- W2137385215 abstract "Glutamine derivative 1 with two-photon absorbing units has been synthesized and was found to show gelation ability in some solvents. Its self-assembly in the gel phase could be controlled by the solvent and speed of gelation. For example, in DMSO the organogelator self-assembled into H-aggregates with weak exciton coupling between the aromatic moieties. On the other hand, in DMSO/diphenyl ether (1:9, v/v) the molecules formed 1D aggregates, but with strong exciton coupling due to the small distance between the chromophores. Moreover, the formation of these two kinds of aggregates could be adjusted by the ratio of DMSO to diphenyl ether. In DMSO/toluene, DMSO/butanol, DMSO/butyl acetate, and DMSO/acetic acid systems similar results were observed. Therefore, conversion of the packing model occurs irrespective of the nature of the solvent. Notably, a unique sign inversion in the CD spectra could be realized by controlling the speed of gelation in the DMSO/diphenyl ether (1:9, v/v) system. It was found that a low speed of gelation induces the gelator to adopt a packing model with strong pi-pi interactions between the aromatic units. Moreover, the gels, when excited at 800 nm, emit strong green fluorescence and the quantum chemical calculations suggest that intramolecular charge transfer leads to two-photon absorption of the gelator molecule." @default.
- W2137385215 created "2016-06-24" @default.
- W2137385215 creator A5007065150 @default.
- W2137385215 creator A5008054587 @default.
- W2137385215 creator A5021293751 @default.
- W2137385215 creator A5048265287 @default.
- W2137385215 creator A5055751377 @default.
- W2137385215 creator A5057246560 @default.
- W2137385215 creator A5065121574 @default.
- W2137385215 creator A5067009342 @default.
- W2137385215 creator A5079772612 @default.
- W2137385215 creator A5086755853 @default.
- W2137385215 date "2009-09-23" @default.
- W2137385215 modified "2023-10-17" @default.
- W2137385215 title "Self‐Assembly of a Chiral Lipid Gelator Controlled by Solvent and Speed of Gelation" @default.
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