Parity violations on molecular chirality: neutron crystal-structure of d- and l-alanine
文献类型：期刊论文
| 作者 | Wang, WQ; Liu, YN; Gong, Y |
| 刊名 | Acta physico-chimica sinica
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 20期号:11页码:1345-1351 |
| 关键词 | Parity violation Molecular chirality Neutron diffraction D- and l-alanine |
| ISSN号 | 1000-6818 |
| DOI | 10.3866/pku.whxb20041112 |
| 通讯作者 | Wang, wq(wangwq@chem.pku.edu) |
| 英文摘要 | The role of chirality determines the origin of life that almost all amino acids utilized in living systems are of the l-type. starting from z(0) interactions, salam speculated on an explanation in terms of quantum mechanical cooperative and condensation phenomena where the electron-nucleon system has the same status as cooper-pairing, which could give rise to second-order phase transitions (including d to l transformations) below a critical temperature t-c (similar to250 k). neutron diffraction of single crystal d- and l-alanine was performed to look for the characteristic structural feature above and below the t, (295 k and 60 k) and the possibility of d- to l-type transformation. data analysis of the temperature effect on the crystal lattice together with the nh3+ torsional motion, parity-violating energy difference (delta e-pv) as a function of dihedral angle (omega), the co2 (theta) and nh3 (psi) torsion angles and the contribution of c-alpha - (ho)-o-... = c hydrogen bond is discussed. observation of the behavior of weak hydrogen bonding during the cooling process threw a light on the distinction between d- and l-alanine, which could be attributed to the parity-violating weak interactions. measurements of the neutron crystal-structure of d-alanine rule out the possibility of configuration transition to l-alanine, which means that salam phase transition is not a conventional structure transition. |
| WOS关键词 | MIRROR-IMAGE MOLECULES ; ENERGY DIFFERENCE ; PHASE-TRANSITIONS ; ORIGIN |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000225381400012 |
| 出版者 | PEKING UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376866 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, WQ |
| 作者单位 | Peking Univ, Coll Chem & Chem Engn, Dept Appl Chem, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, WQ,Liu, YN,Gong, Y. Parity violations on molecular chirality: neutron crystal-structure of d- and l-alanine[J]. Acta physico-chimica sinica,2004,20(11):1345-1351. |
| APA | Wang, WQ,Liu, YN,&Gong, Y.(2004).Parity violations on molecular chirality: neutron crystal-structure of d- and l-alanine.Acta physico-chimica sinica,20(11),1345-1351. |
| MLA | Wang, WQ,et al."Parity violations on molecular chirality: neutron crystal-structure of d- and l-alanine".Acta physico-chimica sinica 20.11(2004):1345-1351. |
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来源：中国科学院大学
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