期刊
CHEMICAL PHYSICS LETTERS
卷 417, 期 4-6, 页码 475-479出版社
ELSEVIER
DOI: 10.1016/j.cplett.2005.10.075
关键词
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Solid state NMR techniques are used to study bent-shape achiral molecules which can form a new type of mesophases, known as 'banana' or B phases. In particular, a recent method called SUPER is applied to two solids of this type of polar mesogens, rotating at the magic angle, to extract carbon-13 chemical shift anisotropy tensors. They are useful not only to aid C-13 peak assignments in the isotropic state, but are necessary for accounting the observed chemical shifts of various carbon sites. resided on the bent-core aromatic part, in the spectrum of an aligned mesophase. An example to extract ordering information is given for one of the studied mesogens. (c) 2005 Elsevier B.V. All rights reserved.
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