The Behavior of the Deformation Vibration of NH3 in Semi-Organic Crystals under High Pressure Studied by Raman Spectroscopy

被引：3
作者：
de Oliveira Cavaignac, Andre Luis [1 ,2 ]
Soares, Rilleands Alves [1 ]
Cruz Lima, Ricardo Jorge [1 ]
Facanha Filhoo, Pedro de Freitas [1 ]
Cavalcante Freire, Paulo de Tarso [3 ]
机构：
[1] Univ Fed Maranhao, Ctr Ciencias Sociais Saude & Tecnol, BR-65900410 Imperatriz, MA, Brazil
[2] Univ Ceuma, Dept Engn, BR-65903093 Imperatriz, MA, Brazil
[3] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil
来源：
CRYSTALS | 2018年 / 8卷 / 06期
关键词：
semi-organic crystals; high-pressures; raman spectroscopy; L-ALANINIUM NITRATE; MONOGLYCINE NITRATE; SPECTRA;
D O I：
10.3390/cryst8060245
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Single-crystal samples of the semi-organic compounds mono-l-alaninium nitrate and monoglycine nitrate have been studied by Raman spectroscopy in a diamond-anvil cell up to 5.5 GPa, in order to observe the behavior of the deformation mode of NH3 units. It was observed for these semi-organic crystals that increasing pressure produces a decrease in the wavenumber of the band associated with the deformation vibration, differently from most of the modes. Comparatively, mono-l-alaninium has a higher d/dP than monoglycine nitrate, for the band associated with the deformation vibration. The anomalous behavior is explained in terms of the effect of high pressure in the short and linear intermolecular hydrogen bonds.
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页数：7
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