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
文献类型：期刊论文
| 作者 | Wang Wen-Qing1; Zhang Yu-Feng1,2; Gong Yan1,2 |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000334558200002 |
| 出版者 | PEKING UNIV PRESS |
| 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. |
入库方式： OAI收割
来源：化学研究所
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