Design and Synthesis of Pyridyl Ethynylthiophene Derivatives with Long-Chain Pyridyl Dicarboxyamide and Their Supramolecular Organogelating Properties

• Main Authors: PEI-YING-LIN, 林佩頴
• Other Authors: Shih-Sheng Sun
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/20140187731967151976

碩士 === 國立中正大學 === 化學暨生物化學研究所 === 104 === A series of organogelators EI-01、EI-03 was designed and synthesized. These gelators are composed of pyridyl ethynylthiophene derivatives with long-chain pyridine-2,6-dicarboxamide. These gelators have shown great ability to immobilize a variety of organic solvents to form gels. The formation of supramolecular gels is achieved from self-assembly of gelator molecules via cooperative hydrogen bonding, P-Pstacking interactions followed by secondary interations with solvent molecules. The presence of aggregates was confirmed by variable-temperature 1H NMR and absorption/emission spectroscopy. The supramolecular aggregates in these organogels are considered to be the J-type aggregation. The xerogels studied by SEM and TEM revealed fiber-like morphologies. Among all gelators, EI-01 exhibits the greatest ability to form stable gel in toluene with a critical gelation concentration of 3.9 mg/mL.