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通过 NMR 光谱研究 1,2-二取代乙烷向列相和各向同性相中二聚体(I22)的构象和取向有序性。

The conformation and orientational order of a 1,2-disubstituted ethane nematogenic molecule (I22) in liquid crystalline and isotropic phases studied by NMR spectroscopy.

机构信息

School of Chemistry, University of Southampton, Southampton, UKSO17 1BJ.

出版信息

Phys Chem Chem Phys. 2010 Mar 28;12(12):2895-914. doi: 10.1039/b915587b. Epub 2010 Feb 1.

Abstract

The structure, conformation and orientational order of the mesogen I22 have been studied by proton, carbon-13 and deuterium 1D and 2D-NMR spectroscopies at natural abundance and at various magnetic fields when in the nematic phase, the isotropic phase close to the nematic-isotropic phase transition, and as a solute in the chiral nematic solution comprised of the polypeptide PBLG dissolved in chloroform. It is concluded that 95% of conformers have a trans arrangement about the central C-C bond of the ethane fragment in all phases.

摘要

已通过质子、碳-13 和氘的 1D 和 2D-NMR 光谱法在天然丰度下以及在向列相、接近向列-各向同性相转变的各向同性相以及作为包含溶解在氯仿中的多肽 PBLG 的手性向列溶液中的溶质时,研究了介晶 I22 的结构、构象和取向有序性。结论是,在所有相中,95%的构象在中央 C-C 键处具有乙烷片段的反式排列。

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