Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/27503
Title: Synthesis, characterization and potential applications of pyrene based organic materials
Authors: JHINUK GUPTA
Keywords: pyrene, fluorescence, conjugated polymers, self-assembly, nanoparticles, phase transfer, fluorescent antioxidant
Issue Date: 6-Sep-2010
Source: JHINUK GUPTA (2010-09-06). Synthesis, characterization and potential applications of pyrene based organic materials. ScholarBank@NUS Repository.
Abstract: Fluorescent pyrene derivatives have found applications in various fields of science including organic electronics, sensors and conformational studies. However, the need for systematic research and product development of pyrene derivatives still remains. The aim of this thesis was to gain insight about structure-property relationship of pyrene derivatives by synthesizing a series of small molecules and polymers and to use them for different applications. Structurally versatile side arms, shape of polymer backbone and location of the pyrene units on the polymer chain have been explored as the contributing parameters toward physical properties of the target compounds such as electronic conjugation, thermal stability, self-assembly, crystal packing and surface topology. Some of the key findings showed significant enhancement of conjugation upon successive introduction of acetylene units in the side arms of small molecules and by incorporation of pyrene on the polymer backbone. Kinked backbone was found to be more conjugated as compared to the linear analogue. It was possible to form self-assembled nanostructures with regular shape and size via introducing amphiphilicity to the derivatives. The synthesized compounds with thioacetate and hydroxyl binding groups were successfully employed for the removal of silver and gold nanoparticles from water with quantitative extraction efficiencies. Higher radical quenching efficiency of the synthesized pyrene¿pyrogallol derivatives as compared to natural antioxidants such as vitamin-C indicates their potential use as fluorescent antioxidants.
URI: http://scholarbank.nus.edu.sg/handle/10635/27503
Appears in Collections:Ph.D Theses (Open)

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