Far-infrared spectra of amino acids

被引：109

作者：

Matei, A ^{[1
]}

Drichko, N ^{[1
]}

Gompf, B ^{[1
]}

Dressel, M ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Phys 1, D-70550 Stuttgart, Germany

来源：

CHEMICAL PHYSICS | 2005年 / 316卷 / 1-3期

关键词：

amino acids; far-infrared absorption;

D O I：

10.1016/j.chemphys.2005.04.033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The far-infrared absorption of polycrystalline samples of 18 amino acids has been measured in the spectral range from 10 to 650 cm(-1). The assignment of the observed bands is based on comparing the spectra of different amino acids and normal modes calculations present in literature. The absorption peaks can be grouped in five regions that are characteristic for all the specimens. In the region 480-650 cm(-1) COO- rocking/wagging/bending modes are observed. NH3+ torsion is dominant in the range 380-480 cm(-1). Between 270 and 380 cm(-1) the (CN)-N-alpha deformation mode dominates, followed by a region between 220 and 270 cm(-1) specific for COO- vibrations. Below 220 cm(-1) a one-to-one correspondence of absorption frequencies to certain modes (COO- torsion, (NCC)-C-alpha deformation, NH3+ torsion, and omnipresent H bonds) is no more possible. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：61 / 71

页数：11

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