Chemically-Induced Discotic Liquid Crystals. Structural Studies with Nmr Spectroscopy
摘要:
Deuterium NMR spectroscopy provides an especially important technique with which to investigate a wide range of liquid crystal behaviour. Here, we describe its use in the structural study of liquid crystals formed from discotic or disc-like molecules and, to illustrate the breadth and power of the NMR method, we have selected two systems in which the liquid crystal phases are chemically induced. The binary mixtures are similar in that one component is a radial multiyne but differ significantly in the nature of the chemical inductor. In one case the inductor is a nitrated fluorenone which has a similar anisotropy to the radial multiyne while for the second system the inductor, a substituted o-xylene is considerably smaller and far less anisotropic. By measuring the deuterium NMR spectra of suitably deuteriated versions of the components we show how it is possible to investigate the orientational order of the components in the various induced phases, their effective molecular symmetry, the molecular geometry, the chain flexibility and orientational order together with the phase symmetry. The results of these investigations are described and explained.
Chemically-Induced Discotic Liquid Crystals. Structural Studies with Nmr Spectroscopy
摘要:
Deuterium NMR spectroscopy provides an especially important technique with which to investigate a wide range of liquid crystal behaviour. Here, we describe its use in the structural study of liquid crystals formed from discotic or disc-like molecules and, to illustrate the breadth and power of the NMR method, we have selected two systems in which the liquid crystal phases are chemically induced. The binary mixtures are similar in that one component is a radial multiyne but differ significantly in the nature of the chemical inductor. In one case the inductor is a nitrated fluorenone which has a similar anisotropy to the radial multiyne while for the second system the inductor, a substituted o-xylene is considerably smaller and far less anisotropic. By measuring the deuterium NMR spectra of suitably deuteriated versions of the components we show how it is possible to investigate the orientational order of the components in the various induced phases, their effective molecular symmetry, the molecular geometry, the chain flexibility and orientational order together with the phase symmetry. The results of these investigations are described and explained.
[EN] INHIBITORS OF PHOSPHOLIPID SYNTHESIS AND METHODS OF USE<br/>[FR] INHIBITEURS DE SYNTHÈSE DE PHOSPHOLIPIDES ET PROCÉDÉS D'UTILISATION
申请人:UNIV LELAND STANFORD JUNIOR
公开号:WO2019165232A1
公开(公告)日:2019-08-29
Inhibitors of Glycerol 3-Phosphate Acyltransferase (GPAT) are provided; and methods of use in the treatment of cancer; and treatment of conditions relating to metabolic syndrome and hyperlipidemia.
Chemically-Induced Discotic Liquid Crystals. Structural Studies with Nmr Spectroscopy
作者:J. R. Hughes、G. R. Luckhurst、K. Praefcke、D. Singer、W. M. Tearle
DOI:10.1080/15421400390213311
日期:2003.1
Deuterium NMR spectroscopy provides an especially important technique with which to investigate a wide range of liquid crystal behaviour. Here, we describe its use in the structural study of liquid crystals formed from discotic or disc-like molecules and, to illustrate the breadth and power of the NMR method, we have selected two systems in which the liquid crystal phases are chemically induced. The binary mixtures are similar in that one component is a radial multiyne but differ significantly in the nature of the chemical inductor. In one case the inductor is a nitrated fluorenone which has a similar anisotropy to the radial multiyne while for the second system the inductor, a substituted o-xylene is considerably smaller and far less anisotropic. By measuring the deuterium NMR spectra of suitably deuteriated versions of the components we show how it is possible to investigate the orientational order of the components in the various induced phases, their effective molecular symmetry, the molecular geometry, the chain flexibility and orientational order together with the phase symmetry. The results of these investigations are described and explained.