A solid-state linear dichroic infrared spectral study of 4-aminopyridine

被引:29
作者
Arnaudov, MG [1 ]
Ivanova, BB [1 ]
Dinkov, SG [1 ]
机构
[1] Univ Sofia, Dept Chem, Sofia 1164, Bulgaria
关键词
4-aminopyridine; LD-IR spectral analysis; solid state;
D O I
10.1016/j.vibspec.2004.08.003
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A linear dichroic infrared (IR-LD) spectral analysis of solid 4-aminopyridine (4-AP) samples was carried out using two orientation techniques, i.e., as polycrystalline layers and in a nematic mesophase. The so-called reducing-difference procedure was used for the polarized IR-spectra interpretation. By achieving a more precise assignment of a part of the 4-AP characteristic frequencies, the obtained data proved a Fermi-resonance splitting of the symmetrical NH2-stretch and confirmed the predominant aromatic character of the pyridine ring. The possibilities of the difference IR-LD technique used for the study of the supramolecular solid-state structure are also illustrated. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:145 / 147
页数:3
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