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	Switch from intra- to intermolecular h-bonds by ultrasound: induced gelation and distinct nanoscale morphologies
	Wang, Yaobing; Zhan, Chuanlang; Fu, Hongbing1; Li, Xiao; Sheng, Xiaohai; Zhao, Yonasheng; Xiao, Debao; Ma, Ying; Ma, Jin Shi; Yao, Jiannian
刊名	Langmuir
	2008-08-05
卷号	24期号:15页码:7635-7638
ISSN号	0743-7463
DOI	10.1021/la801499y
通讯作者	Fu, hongbing(hongbing.fu@iccas.ac.cn)
英文摘要	During cooling of the (r)-n-fmoc-octylglycine (fmoc-og)/cycloliexane solution, gelation is observed exclusively when ultrasound is used as an external stimulus, while deposit is obtained without sonication. the xerogel consists of entangled fibrous network made by interconnected nanofibers, while the deposit comprises large numbers of unbranched nanowires. it is found that the fmoc-og molecules form bilayer structures in both the deposit and the gel. however, the ratio (r) between the fmoc-og molecules in a stable intrarnolecular h-bonding conformation and those in a metastable intermolecular h-bonding conformation can be tuned by the ultrasound, r (deposit) > r (gel). the increased population of the intermolecular h-bonding fmoc-og molecules induced by the ultrasonication facilitates to the interconnection of nanofibers for the formation of the fibrous network, and therefore gelation. the alteration in the morphologies and properties of the obtained nanomaterials induced by the ultrasound wave demonstrates a potential method for smart controlling of the functions of nanomaterials from the molecular level.
WOS关键词	SOL-GEL TRANSITION ; PI-STACKED POLYMER ; FUNCTIONAL MATERIALS ; CIRCULAR-DICHROISM ; ORGANIC FLUIDS ; ORGANOGELS ; MOLECULES ; NANOSTRUCTURES ; SYSTEM
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000258034500003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2384566
专题	中国科学院大学
通讯作者	Fu, Hongbing
作者单位	1.Chinese Acad Sci, Inst Chem, BNLMS, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yaobing,Zhan, Chuanlang,Fu, Hongbing,et al. Switch from intra- to intermolecular h-bonds by ultrasound: induced gelation and distinct nanoscale morphologies[J]. Langmuir,2008,24(15):7635-7638.
APA	Wang, Yaobing.,Zhan, Chuanlang.,Fu, Hongbing.,Li, Xiao.,Sheng, Xiaohai.,...&Yao, Jiannian.(2008).Switch from intra- to intermolecular h-bonds by ultrasound: induced gelation and distinct nanoscale morphologies.Langmuir,24(15),7635-7638.
MLA	Wang, Yaobing,et al."Switch from intra- to intermolecular h-bonds by ultrasound: induced gelation and distinct nanoscale morphologies".Langmuir 24.15(2008):7635-7638.

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