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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/50365

    Title: Synthesis, Optical, and Mesomorphic Properties of Self-Assembled Organogels Featuring Phenylethynyl Framework with Elaborated Long-Chain Pyridine-2, 6-Dicarboxamides
    Authors: Shen, Yuan-ting;Li, Chun-hsian;Chang, Kai-chi;Chin, Ssih-yu;Lin, Hsing-an;Liu, Ya-ming;Hung, Chen-yen;徐秀福;Hsu, Hsiu-fu;Sun, Shih-sheng
    Contributors: 淡江大學化學學系
    Date: 2009-08-01
    Issue Date: 2010-08-09 15:53:31 (UTC+8)
    Publisher: American Chemical Society (ACS)
    Abstract: A series of new organogelators with π-conjugated phenylethynyl framework featuring long-chain carboxamides have been synthesized. These organgelators have shown great ability to gel a variety of organic solvents to form stable organogels with the minimum gelation concentration as low as 0.1 wt %. Gelation is completely thermoreversible, and it occurs due to the aggregation of the organogelators resulting in the formation of a fibrous network via a combination of intermolecular hydrogen bonding, π−π stacking, and van der Waals interactions that is observed for the xerogels by TEM. The influence of sol-to-gel transition has been explored in detail by variable-temperature 1H NMR, UV−vis absorption, and fluorescence spectroscopy. Aggregation-induced enhanced emission has been observed in these organogelator molecules with an order of higher fluorescence quantum yields from solution to gels. In addition, some molecules also exhibit unique liquid crystalline properties over a large temperature range as revealed by DSC and POM studies.
    Relation: Langmuir 25(15), pp.8714-8722
    DOI: 10.1021/la900003m
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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