Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16712
Title: Synthesis and application in PPE-based fluorescence chemosensor
Authors: CHENG ZHONGYAO
Keywords: Chemosensor; Fluorescence; Self-Assemble; PPE.
Issue Date: 21-Feb-2009
Source: CHENG ZHONGYAO (2009-02-21). Synthesis and application in PPE-based fluorescence chemosensor. ScholarBank@NUS Repository.
Abstract: A series of polymers consisting of alternating oligo(p-phenyleneethynylene) chromophores and flexible oligo(ethylene oxide) segments were synthesized. Their solvent-induced and cation-induced aggregation behavior was established by optical and 1H NMR spectroscopic studies. Folding of the oligo(ethylene oxide) in the polymer backbone allowed effective O -O stacking of oligo(p-phenyleneethynylene) chromophores. Selective fluorescence quenching by Ca2+ was achieved in a solution of a polymer with a backbone of tetra(p-phenyleneethynylene) and penta(ethylene-oxide) in alternation. Atomic force microscopy (AFM) images of polymer deposited from solution indicated aggregation projecting perpendicular to the surface plane.
URI: http://scholarbank.nus.edu.sg/handle/10635/16712
Appears in Collections:Master's Theses (Open)

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