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	Formation and properties of supramolecular hydrogels based on 1, 2, 4, 5-benzene tetracarboxylic acid and 2-amino-3-hydroxy pyridine
	Kono, S. ; Yu-jiang Wang ; Li-ming Tang
	2010-10-12 ; 2010-10-12
关键词	Experimental/ Fourier transform spectra hydrogels hydrogen bonds infrared spectra materials preparation proton magnetic resonance scanning electron microscopy X-ray diffraction/ supramolecular hydrogels 1,2,4,5-benzene tetracarboxylic acid 2-amino-3-hydroxy pyridine /sup 1/H NMR analysis paraphthalic acid orthophthalic acid carboxyl group benzene ring gelators material preparation FT-IR spectrum BTCA-AHP molar ratio gel-sol dissociation temperature SEM powder X-ray diffraction hydrogen bonded network/ A8270G Gels and sols A7660 Nuclear magnetic resonance and relaxation (condensed matter) A8120 Other methods of preparation of materials A7830C Infrared and Raman spectra in liquids
中文摘要	On the basis of /sup 1/H NMR analysis of the model complexes formed from ortho-, meta-, and para-phthalic acid with 2-amino-3-hydroxy pyridine (AHP), it was found that the two carboxyl groups located at the ortho position of the benzene ring more easily interact with AHP than those at meta- and para positions. A series of gelators (defined at G1-G5) were prepared from 1, 2, 4, 5-benzene tetracarboxylic acid (BTCA) and AHP at different molar ratios, and their structures were analyzed by /sup 1/H NMR and FT-IR. The gelation performances of the gelators were investigated in details, which indicated that G3 formed at the BTCA/AHP molar ratio of 1.0/2.3 possessed the shortest gelation time, the lowest minimal gelation concentration (MGC), and the highest maximal gel-to-sol dissociation temperature (T/sub gel/). The xerogels were analyzed by SEM and powder X-ray diffraction, especially, the single crystal of G1 obtained directly from the gelling solvent showed complicated hydrogen bonded networks which were a direct evidence to explain the connecting network of the molecules. Based on this, the gelation properties were discussed. The relationship between the structures and properties of the gels is helpful for understanding the gelating mechanism and designing new gelators. Copyright c 2009 John Wiley & Sons, Ltd.
语种	英语
出版者	John Wiley & Sons Ltd. ; UK
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79548]
专题	清华大学
推荐引用方式 GB/T 7714	Kono, S.,Yu-jiang Wang,Li-ming Tang. Formation and properties of supramolecular hydrogels based on 1, 2, 4, 5-benzene tetracarboxylic acid and 2-amino-3-hydroxy pyridine[J],2010, 2010.
APA	Kono, S.,Yu-jiang Wang,&Li-ming Tang.(2010).Formation and properties of supramolecular hydrogels based on 1, 2, 4, 5-benzene tetracarboxylic acid and 2-amino-3-hydroxy pyridine..
MLA	Kono, S.,et al."Formation and properties of supramolecular hydrogels based on 1, 2, 4, 5-benzene tetracarboxylic acid and 2-amino-3-hydroxy pyridine".(2010).

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