Tuning the Helicity of Self-Assembled Structure of a Sugar-Based Organogelator by the Proper Choice of Cooling Rate

doi:10.1021/la903064n

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	Tuning the Helicity of Self-Assembled Structure of a Sugar-Based Organogelator by the Proper Choice of Cooling Rate
	Cui, Jiaxi; Liu, Anhua; Guan, Yan; Zheng, Jia; Shen, Zhihao; Wan, Xinhua
刊名	LANGMUIR
	2010-03-02
卷号	26 期号:5 页码:3615-3622
ISSN号	0743-7463
DOI	10.1021/la903064n
英文摘要	A novel sugar-appended low-molecular-mass gelator, 4 ''-butoxy-4-hydroxy-p-terphenyl-beta-D-glucoside (BHTG), was synthesized. It formed thermally reversible gels in a variety of aqueous and organic solvents. Three-dimensional networks made up of helical ribbons were observed in the mixture H(2)O/1,4-dioxane (40/60 v/v). The handedness of the ribbons depended on the rate of gel formation. Fast-cooling process led to right-handed ribbons, while slow-cooling process led to left-handed ones. A combinatory analyses of microscopic, spectroscopic, and diffraction techniques revealed that BHTG formed a twisted interdigitated bilayer structure with a d spacing of 3.1 nm in gels through a kinetically controlled nucleation-growth process. There were two kinds of molecular orientations of BHTG in the nuclei, clockwise and anticlockwise. which dictated the growth of ribbons. One was metastable and formed first during the cooling process of gel formation. It was able to gradually transform into the more stable latter one with decreasing temperature, Fast-cooling process did not leave enough time for the nuclei to evolve from transformed to stable state and the ribbons grown from them exhibited right-handedness. However, the metastable nuclei transformed into the stable one when cooled slowly and directed the molecules of BHTG to grow into left-handed aggregates.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000274636900094
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69905]
专题	中国科学院化学研究所
通讯作者	Wan, Xinhua
作者单位	Peking Univ, Coll Chem & Mol Engn, Key Lab Polymer Chem & Phys, Beijing Natl Lab Mol Sci,Minist Educ, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Cui, Jiaxi,Liu, Anhua,Guan, Yan,et al. Tuning the Helicity of Self-Assembled Structure of a Sugar-Based Organogelator by the Proper Choice of Cooling Rate[J]. LANGMUIR,2010,26(5):3615-3622.
APA	Cui, Jiaxi,Liu, Anhua,Guan, Yan,Zheng, Jia,Shen, Zhihao,&Wan, Xinhua.(2010).Tuning the Helicity of Self-Assembled Structure of a Sugar-Based Organogelator by the Proper Choice of Cooling Rate.LANGMUIR,26(5),3615-3622.
MLA	Cui, Jiaxi,et al."Tuning the Helicity of Self-Assembled Structure of a Sugar-Based Organogelator by the Proper Choice of Cooling Rate".LANGMUIR 26.5(2010):3615-3622.