Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/36524
Title: NOVEL CHROMOPHORES BASED ON CLOSED-SHELL AND OPEN-SHELL POLYCYCLIC AROMATIC HYDROCARBONS
Authors: ZENG ZEBING
Keywords: Polycyclic aromatic hydrocarbon, two photon absorption, octupolar chromophore, hexa-peri-hexabenzocoronene, quinoidal rylenes, Chichibabin’s hydrocarb
Issue Date: 3-Aug-2012
Source: ZENG ZEBING (2012-08-03). NOVEL CHROMOPHORES BASED ON CLOSED-SHELL AND OPEN-SHELL POLYCYCLIC AROMATIC HYDROCARBONS. ScholarBank@NUS Repository.
Abstract: The thesis demonstrated the design and synthesis of novel chromophores based on functionalized polycyclic aromatic hydrocarbons (PAHs) and stable open-shell PAHs with tunable electronic ground state. Their promising properties and related applications were also investigated. For functionalized PAHs, the novel C3 symmetric hexa-peri-hexa benzocoronene chromophores (HBC-NO2, HBC-CN, HBC-CF3, and HBC-COOH) have been prepared for the first time. Remarkable two photon absorption responses and optical power limiting performances were achieved for octupolar HBC derivatives. All these disc-like molecules self-assembed into two-dimensional network at solid-liquid interface via dipole-dipole or hydrogen -bonding interactions. For open-shell PAHs, new stable benzannulated Chichibabin¿s hydrocarbons (1-CS and 2-OS) and quinoidal rylenes (Per-CN, 2Per-CN, QDTP and QDTQ) with tunable ground electronic state were successfully synthesized and their geometry in the ground state were investigated by various experiments. These work established a new approach to design stable open-shell PAHs and also provided reliable characterization methods.
URI: http://scholarbank.nus.edu.sg/handle/10635/36524
Appears in Collections:Ph.D Theses (Open)

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