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Title: Chiral modification of metal nanoparticle surfaces
Keywords: Chiral, metal nanoparticles, vibrational circular dichroism, xanthate, menthol, perillyl alcohol
Issue Date: 30-Jul-2009
Citation: NGUYEN NGOC TU (2009-07-30). Chiral modification of metal nanoparticle surfaces. ScholarBank@NUS Repository.
Abstract: The aim of this project is to introduce chirality onto surfaces of transition metal nanoparticles. Chirally modified metal nanoparticles were synthesized by two methods: i) a one-step method involving pre-preparation of chiral potassium xanthates and use of these xanthates for synthesis of gold and silver nanoparticles; ii) a two-step method related to esterification of chiral alcohols with MUA-capped gold nanoparticles and chiral phosphate with MUO-capped gold nanoparticles. Xanthates were found to play the role as a good capping agent and can be used as a contaminant-free substitute for both alkylthiol and TOAB in the conventional Brust-Schiffrin synthesis of metal nanoparticles. Esterification reactions of chiral alcohols with MUA-capped gold nanoparticles and chiral phosphates with MUO-capped gold nanoparticles were demonstrated to be conducted under mild conditions by utilizing BOP and triphenylphosphine-tetrachloromethane as catalysts. Vibrational circular dichroism spectra of L-menthylxanthate gold and silver nanoparticles were predicted by DFT computations.
Appears in Collections:Master's Theses (Open)

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