Study of the hydrogen bonding of 1,4-bis[(3,4,5-trihexyloxyphenyl)hydrazide]phenylene in crystalline and liquid crystalline phases using infrared, Raman, and two-dimensional correlation spectroscopy

被引：5

作者：

Bai, Binglian ^{[1
,2
,3
]}

Wei, Jue ^{[1
]}

Kummetha, Raghunatha Reddy ^{[2
]}

Ozaki, Yukihiro ^{[2
]}

Wang, Haitao ^{[3
]}

Li, Min ^{[3
]}

机构：

[1] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda 6691337, Japan

[3] Jilin Univ, Coll Mat Sci & Engn, Changchun 130023, Peoples R China

来源：

VIBRATIONAL SPECTROSCOPY | 2014年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Two-dimensional correlation analysis; Infrared spectroscopy; Raman spectroscopy; Intermolecular hydrogen bonding; Hexagonal columnar mesophase; Liquid crystals; DEPENDENT SPECTRAL VARIATIONS; HETEROSPECTRAL CORRELATION; N-METHYLACETAMIDE; TRANSITION; MOLECULES; STATE; BEHAVIOR;

D O I：

10.1016/j.vibspec.2014.06.001

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The vibrational bands of a dihydrazide derivative, 1,4-bis[(3,4,5-trihexyloxyphenyl)hydrazide]phenylene (TC6), observed in the Raman and infrared spectra were assigned. The intermolecular hydrogen bonding vibrational bands due to C=O and NH groups in the low-frequency Raman spectra were observed at 111 and 94 cm(-1) in the crystalline and liquid crystalline (LC) phases, respectively. The sequential order of changes in the hydrogen bonding and alkyl chains was opposite in the crystalline and LC phases. The modifications in the hydrogen bonding occurred prior to conformational changes in the hydrocarbon chains in the crystalline phase; however, a reverse trend was observed in the LC phase. Simultaneously, the two-dimensional (2D) IR and Raman correlation spectroscopic analysis showed that the amide I band of TC6 in the LC phase comprised at least five distinct bands. In addition, the hetero 2D correlation between the NH and C=O groups confirmed that no free NH and C=O groups existed in the LC phase. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：150 / 157

页数：8

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