水合蛭石中组氨酸的手性相互作用
Chiral Interactions of Histidine in a Hydrated Vermiculite
摘要：
最近的工作表明，从默奇森陨石中提取的氨基酸异缬氨酸的手性不对称性与含水蚀变的程度之间存在联系。本文介绍了一种一维有序正丙基铵蛭石的中子散射实验结果。在实验温度和浓度下，蛭石凝胶的（001）d-间距为5 nm量级，且d-间距对浓度、温度和电子环境的变化敏感。数据表明，等温添加D-组氨酸或L-组氨酸溶液产生的位移的d-间距是不同的每种对映异构体。这种手性特异性是感兴趣的问题，是否粘土可能发挥了重要作用的起源生物homochirality。
英文摘要：
Recent work suggests a link between chiral asymmetry in the amino acid iso-valine extracted from the Murchison meteorite and the extent of hydrous alteration. We present the results of neutron scattering experiments on an exchanged, 1-dimensionally ordered n-propyl ammonium vermiculite clay. The vermiculite gel has a (001) d-spacing of order 5nm at the temperature and concentration of the experiments and the d-spacing responds sensitively to changes in concentration, temperature and electronic environment. The data show that isothermal addition of D-histidine or L-histidine solutions produces shifts in the d-spacing that are different for each enantiomer. This chiral specificity is of interest for the question of whether clays could have played an important role in the origin of biohomochirality.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
