Water inversed helicity of nanostructures from ionic self-assembly of a chiral gelator and an achiral component

doi:10.1039/c9sm01176e

CORC > 化学研究所 > 中国科学院化学研究所

	Water inversed helicity of nanostructures from ionic self-assembly of a chiral gelator and an achiral component
	Liu, Changxia; Yang, Dong; Zhang, Li; Liu, Minghua
刊名	SOFT MATTER
	2019-08-28
卷号	15 期号:32 页码:6557-6563
ISSN号	1744-683X
DOI	10.1039/c9sm01176e
英文摘要	The ionic self-assemblies (ISAs) formed by a cationic chiral organogelator (l-glutamide amphiphile, abbreviated as PULG) and anionic dyes exhibited helical nanostructures. And the formed helical structures can be tuned by water amount in the ethanol/water solvent. In pure ethanol, the chirality of the gelator was successfully transferred to the achiral components, which was confirmed by the appearance of an induced CD signal in the achiral components. Meanwhile, the electrostatic interaction between the gelator and achiral dyes contributed to the chirality amplification, causing the nanofibrous structures of the gelator to be transformed to uniform left-handed helices. Upon adding water to ethanol, the induced CD signal exhibited inversion from positive to negative. Interestingly, the left-handed helices formed by ISA of PULG/anionic dyes in ethanol were inverted to right-handed helices with the addition of water. Based on detailed investigations of the XRD patterns, CD and UV/Vis spectra, the mechanism of helicity inversion was proposed: left-handed helices were dominated by hydrogen bonding and right-handed helices were dominated by pi-pi stacking. This work exemplifies a feasible method to invert the helicity of chiral nanostructures in co-assembly and gives an insight into the conformation change of biomacromolecules in a biological system.
语种	英语
WOS记录号	WOS:000481424100010
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82633]
专题	中国科学院化学研究所
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Changxia,Yang, Dong,Zhang, Li,et al. Water inversed helicity of nanostructures from ionic self-assembly of a chiral gelator and an achiral component[J]. SOFT MATTER,2019,15(32):6557-6563.
APA	Liu, Changxia,Yang, Dong,Zhang, Li,&Liu, Minghua.(2019).Water inversed helicity of nanostructures from ionic self-assembly of a chiral gelator and an achiral component.SOFT MATTER,15(32),6557-6563.
MLA	Liu, Changxia,et al."Water inversed helicity of nanostructures from ionic self-assembly of a chiral gelator and an achiral component".SOFT MATTER 15.32(2019):6557-6563.