270541



    ABSTRACTS VIEWS

    5023



    VIEWS & DOWNLOAD

    Browsing by Subject Quang lý học

    Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    or enter first few letters:  
    Showing results [1 - 1] / 1
    • 3214759.PDF.jpg
    • Thesis


    • Authors: Fan, Li-juan (2006)

    • This dissertation explores the synthesis, characterization, and application of conjugated polymers as fluorescence “turn-on” chemosensors. A series of conjugated polymers using the poly[p-(phenyleneethynelene)-alt-(thienylene-ethylene)](PPETE) polymer backbone were prepared using N,N-diethylamino (dea) and N,N,N’-trimethylethylenediamino (tmeda) groups as receptors. The conjugated polymers were designed as fluorescence “turn-on” chemosensors based on a photoinduced electron transfer (PET) mechanism in which the polymer fluorescence is quenched in the absence of coordinating analytes. A chelation-enhanced fluorescence (CHEF) phenomenon results upon coordination of a cation to the redox...