Crystal Fine Structure and Optical Rotatory Angle Study on Spin Superfluidity of Intermolecular N+H center dot center dot center dot O- Hydrogen Bond Electron Cooper Pairing onto D-, L-, and DL-Valine Optical Lattices

doi:10.3866/PKU.WHXB201402181

CORC > 化学研究所 > 中国科学院化学研究所

	Crystal Fine Structure and Optical Rotatory Angle Study on Spin Superfluidity of Intermolecular N+H center dot center dot center dot O- Hydrogen Bond Electron Cooper Pairing onto D-, L-, and DL-Valine Optical Lattices
	Wang Wen-Qing 1; Zhang Yu-Feng 1,2; Gong Yan 1,2
刊名	ACTA PHYSICO-CHIMICA SINICA
	2014-04-01
卷号	30 期号:4 页码:608-622
关键词	X-ray Crystal Fine Structure Optical Rotatory Angle Clockwise And counterClockwise Rotation Of Nh3 -> Co2 Intermolecular n+h Center Dot Center Dot Center Dot o(-)Hydrogen BOnd On Lattice Surface Electron Cooper Pairing SpIn Superfluidity In superconductIng State D- L- And dL-valine Crystal
ISSN号	1000-6818
DOI	10.3866/PKU.WHXB201402181
英文摘要	With a view to understanding the argument of the phase transition mechanisms of D- and L-valine around 270 K, the temperature dependences of the heat capacities of single crystals, ground powders, and polycrystalline products were investigated using differential scanning calorimetry. Endothermic transition peaks were observed at phase transition temperatures of 273.59 and 273.76 K for D- and L-valine single crystals, respectively with an energy difference of 0.18 J center dot mol(-1). The X-ray crystal fine structure of chiral valine was determined using Mo-K-a, radiation (lambda=0.071073 nm) on Nonius Kappa CCD diffractometer. D- and L-valine crystals were monoclinic, with the P2(1) space group, Z=4, lattice constants a= 0.96706(5)/0.96737(5) nm, b=0.52680(3)/0.52664(3) nnn, and c=1.20256(7)/1.20196 (6) nnn, and beta=90.724(2)degrees/ 90.722(3)degrees at similar to 270 K. Two crystallographically independent molecules A (trans form) and B (gauche I from) were observed in the unit cell, these were rotational isomers with two different conformations. X ray diffraction at 293, 270, 223, and 173 K showed that the N-H, H center dot center dot center dot O bond lengths and the N-H center dot center dot center dot O bond angle of D-valine fluctuated at 270 K, but the intramolecular N-H center dot center dot center dot O hydrogen bond was stable and measurable. No evidence was obtained for a configuration transformation from D-valine to L-valine. Based on the clockwise and counterclockwise rotations of NH3 -> CO2 in the chiral valine crystals and the optical rotatory angle measurements, the intermolecular N+H center dot center dot center dot O- hydrogen bond was electronic Cooper pairing and exhibited the spin superfluidity onto D-, L-, and DL- valine crystal lattices from 270 to 290 K upon the transition to the superconducting state.
语种	英语
出版者	PEKING UNIV PRESS
WOS记录号	WOS:000334558200002
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/50289]
专题	中国科学院化学研究所
通讯作者	Wang Wen-Qing
作者单位	1.Peking Univ, Coll Chem & Mol Engn, Dept Appl Chem, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China 2.Beijing Inst Fash Technol, Sch Mat Sci & Engn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang Wen-Qing,Zhang Yu-Feng,Gong Yan. Crystal Fine Structure and Optical Rotatory Angle Study on Spin Superfluidity of Intermolecular N+H center dot center dot center dot O- Hydrogen Bond Electron Cooper Pairing onto D-, L-, and DL-Valine Optical Lattices[J]. ACTA PHYSICO-CHIMICA SINICA,2014,30(4):608-622.
APA	Wang Wen-Qing,Zhang Yu-Feng,&Gong Yan.(2014).Crystal Fine Structure and Optical Rotatory Angle Study on Spin Superfluidity of Intermolecular N+H center dot center dot center dot O- Hydrogen Bond Electron Cooper Pairing onto D-, L-, and DL-Valine Optical Lattices.ACTA PHYSICO-CHIMICA SINICA,30(4),608-622.
MLA	Wang Wen-Qing,et al."Crystal Fine Structure and Optical Rotatory Angle Study on Spin Superfluidity of Intermolecular N+H center dot center dot center dot O- Hydrogen Bond Electron Cooper Pairing onto D-, L-, and DL-Valine Optical Lattices".ACTA PHYSICO-CHIMICA SINICA 30.4(2014):608-622.