Surface recognition of the space group and chiral array on DL-valine crystalline structure observed by AFM

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	Surface recognition of the space group and chiral array on DL-valine crystalline structure observed by AFM
	Gong, Y ; Wang, WQ ; Liu, HW ; Du, SX ; Guo, HM ; Wang, YL ; Gao, HJ
刊名	ACTA PHYSICO-CHIMICA SINICA
	2005
卷号	21 期号:8 页码:867
关键词	VIOLATING ENERGY DIFFERENCE ATOMIC-FORCE MICROSCOPY AMINO-ACIDS L-ALANINE PARITY DISCRIMINATION ENANTIOMERS SEPARATION
ISSN号	1000-6818
通讯作者	Wang, WQ (reprint author), Peking Univ, Coll Chem & Mol Engn, Dept Appl Chem, Beijing 100871, Peoples R China.
中文摘要	Atomic force microscopy(AFM) has been used to image arrays of molecules at the surface of DL-valine crystals. AFM images of DL-valine show that D- and L- molecular pairs formed from a DL-racemic mixture are exclusively homochiral. There are two different conclusions about the crystal structure of DL-valine with the data of X-ray crystallography. First, the structure of DL-valine was solved in the monoclinic space group P2(1)/c. Second, the crystal structure of DL-valine has been refined in the centrosymmetric space group P (1) over bar and indicated a triclinic rather than a monoclinic space group. The present work emphasizes to solve the contradicting observations of space group and to provide direct evidence for chiral recognition at molecular level. DL-valine molecules {001} are all in zwitterionic form with the isopropyl groups close to the surface and methyl groups on the top site, showing an ordered molecular morphology of triclinic unit cells, which are in fair agreement with the X-ray diffraction data. The application of AFM to the investigation of protein's origins and a molecular-level illustration of chiral recognition at a periodic 2D surface structure of racemic crystals is discussed.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/54196]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gong, Y,Wang, WQ,Liu, HW,et al. Surface recognition of the space group and chiral array on DL-valine crystalline structure observed by AFM[J]. ACTA PHYSICO-CHIMICA SINICA,2005,21(8):867.
APA	Gong, Y.,Wang, WQ.,Liu, HW.,Du, SX.,Guo, HM.,...&Gao, HJ.(2005).Surface recognition of the space group and chiral array on DL-valine crystalline structure observed by AFM.ACTA PHYSICO-CHIMICA SINICA,21(8),867.
MLA	Gong, Y,et al."Surface recognition of the space group and chiral array on DL-valine crystalline structure observed by AFM".ACTA PHYSICO-CHIMICA SINICA 21.8(2005):867.