Self-Assembly of Supramolecualr Metallogelator Containing 2-(2′-Hydroxyphenyl) benzoxazole/Zn(II) Chelate
Abstract:A low molar mass organogelator 1 containing 2-(2′-hydroxyphenyl)benzoxazole (HPB) unit with long alkyl chain was synthesized by the reaction with HPB and octyl isocyanate in THF at room temperature. A new chelate-based organogelator 1-Zn(II) was prepared with the reaction of 1 and zinc(II) acetate in methanol and dichloromethane at mild condition. The gelation ability of organogelator was tested by heating–cooling method in various organic solvents, and the opaque gel was formed from DMF. Well-developed self-assembled structure of organogel was confirmed with field emission-scanning electron microscope (FE-SEM) and transmission electron microscope (TEM), and the optical properties of organogel upon aggregation were monitored by UV-Vis and fluorescence spectroscopy. 1-Zn(II) was self-assembled to the sheet-like structure with the thickness of fully extended length of molecules.
Document Type: Research Article
Publication date: October 1, 2010
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