FAR-IR SPECTROSCOPIC INVESTIGATIONS OF NEMATIC LIQUID-CRYSTALS WITH HYDROGEN-BONDED MOLECULES

被引：15

作者：

ANTONOVA, K

PETROV, M

KIROV, N

TENEV, T

RATAJCZAK, H

BARAN, J

机构：

[1] POLISH ACAD SCI,INST LOW TEMP & STRUCT RES,PL-50950 WROCLAW,POLAND

[2] G NADJAKOV INST SOLID STATE PHYS,BU-1784 SOFIA,BULGARIA

[3] WROCLAW UNIV,INST CHEM,PL-50383 WROCLAW,POLAND

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1994年 / 325卷

关键词：

D O I：

10.1016/0022-2860(94)80035-9

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：

Far-IR spectroscopy (200-30 cm-1) was used to study the temperature evolution of the hydrogen bonds in the nematic liquid crystal phase of 4, n-heptyl-, octyl- and nonyl-oxybenzoic acids (HOBA, OOBA and NOBA). The observed absorption bands (v(OH) = 82, 68, 63 and 42 cm-1) are assigned to the four predominant vibrations respectively - stretching, bending (out of and in the dimer ring plane) and twisting. From a spectral band half-width temperature analysis hydrogen-bond evolution in the isotropic and nematic phases is investigated. A cyclic reversible open dimer transformation at different vibrational frequencies and polarizations is indicated.

引用

页码：189 / 201

页数：13

共 29 条

[11] EVIDENCE FOR EXISTENCE OF MORE THAN ONE TYPE ON NEMATIC PHASE [J].