Temperature-dependent optical constants of liquid isopropanol, n-butanol, and n-decane

Wang C. C.; Tan J. Y.; Jing C. Y.; Liu L. H.

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Temperature-dependent optical constants of liquid isopropanol, n-butanol, and n-decane

机译：液体异丙醇，正丁醇和N-癸烷的温度依赖性光学常数

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Liquid isopropanol, n-butanol, and n-decane are combustible organic compounds that are frequently used in theoretical and experimental researches on fuel combustion. In this work, the temperature-dependent optical constants of liquid isopropanol, n-butanol, and n-decane in the region 500-5500 cm(-1) at ambient pressure are measured using the combined ellipsometry-transmission method. In the combined method, the optical constants are first measured by a modified ellipsometry method, and then the absorption indices for weak absorption regions are obtained by the transmission method using the refractive indices measured by the modified ellipsometry method. The refractive indices of liquid isopropanol, n-butanol, and n-decane are within the range from 1.3 to 1.45 in the studied wavelength and temperature region. The absorption indices of these liquids range from 10(-5) to 10(-1). In the temperature range studied, the refractive indices decrease with increasing temperature in an approximately linear manner, but the effects of the temperature on the absorption indices are much smaller. The characteristic wavenumbers of the main absorption peaks are consistent with the vibrational frequencies of major functional groups. (C) 2018 Optical Society of America

机译：液体异丙醇，正丁醇和N-癸烷是可燃有机化合物，其经常用于燃料燃烧的理论和实验研究。在这项工作中，使用组合的椭圆形传动方法测量在环境压力下的液体异丙醇，正丁醇和N-癸烷的温度依赖性光学常数。在组合方法中，首先通过改进的椭圆形方法测量光学常数，然后通过通过修改的椭圆形方法测量的折射率来获得弱吸收区域的吸收指标。液体异丙醇，正丁醇和N-癸烷的折射率在研究的波长和温度区域中的1.3至1.45的范围内。这些液体的吸收索引范围为10（-5）至10（-1）。在研究的温度范围内，折射率随着近似线性方式的升高而增加，但温度对吸收指数的影响要小得多。主要吸收峰的特征波提与主要官能团的振动频率一致。（c）2018年光学学会

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《Applied optics》 |2018年第12期|共9页
作者
Wang C. C.; Tan J. Y.; Jing C. Y.; Liu L. H.;
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Harbin Inst Technol Sch Energy Sci &

Engn Harbin 150001 Heilongjiang Peoples R China;

Harbin Inst Technol Sch Automobile Engn Weihai 264209 Peoples R China;

Harbin Inst Technol Sch Automobile Engn Weihai 264209 Peoples R China;

Harbin Inst Technol Sch Energy Sci &

Engn Harbin 150001 Heilongjiang Peoples R China;

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Temperature-dependent optical constants of liquid isopropanol, n-butanol, and n-decane

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