五酸在空气/水界面处的反射-吸收FT-IR光谱

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 1999-01-15 Epub Date: 1999-03-04 DOI:10.1016/S0927-7757(98)00866-8

B.F Sinnamon , R.A Dluhy , G.T Barnes

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引用次数: 0

摘要

在292和297 K的表面压力范围内，得到了五酸铺展单层膜的反射-吸收傅立叶变换红外光谱。使用了30°入射角的非偏振和s偏振和p偏振辐射。C-H拉伸区的结果表明，当单层膜处于液相膨胀相（LE）时，酰基链的排列无序，具有大量的间扭键，而在缩合相（LC和S）中，酰基链的排列高度有序，以反式键为主。在LE↔LC共存区，从一种形式到另一种形式的转变发生在几乎恒定的表面压力下。

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Reflection–absorption FT-IR spectroscopy of pentadecanoic acid at the air/water interface

Reflection–absorption Fourier transform infrared (RA FT-IR) spectra of spread monolayers of pentadecanoic acid have been obtained for a range of surface pressures at 292 and 297 K. Unpolarised and s- and p-polarised radiation at 30° angle of incidence have been used. Results in the C–H stretching region reveal disorder in the arrangement of the acyl chains with numerous gauche bonds when the monolayer is in the liquid expanded (LE) phase and highly ordered chains with mostly trans bonds in the condensed phases (LC and S). The transition from one form to the other occurs at nearly constant surface pressure in the LE↔LC coexistence region.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.