Linear-dichroic infrared spectroscopy - Validation and experimental design of the new orientation technique of solid samples as suspension in nematic liquid crystal

被引：82

作者：

Ivanova, B. B. ^{[1
]}

Simeonov, V. D. ^{[1
]}

Arnaudov, M. G. ^{[1
]}

Tsalev, D. L. ^{[1
]}

机构：

[1] Univ Sofia St Kl Ohridski, Fac Chem, Sofia 1164, Bulgaria

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2007年 / 67卷 / 01期

关键词：

linear-dichroic infrared spectroscopy; nematic liquid crystal; suspension; DL-isoleucine; validation; experimental design;

D O I：

10.1016/j.saa.2006.06.025

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A validation of the developed new orientation method of solid samples as suspension in nematic liquid crystal (NLC), applied in linear-dichroic infrared (IR-LD) spectroscopy has been carried out using a model system DL-isoleucine (DL-iSoleu). Accuracy, precision and the influence of the liquid crystal medium on peak positions and integral absorbances of guest molecules have been presented. Optimization of experimental conditions has been performed as well. An experimental design for quantitative evaluation of the impact of four input factors: the number of scans, the rubbing-out of KBr-pellets, the amount of studied compounds included in the liquid crystal medium and the ratios of Lorentzian to Gaussian peak functions in the curve fitting procedure on the spectroscopic signal at five different frequencies, indicating important specifities of the system has been studied. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：66 / 75

页数：10

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