The benefits of vaporization by laser ablation and the high resolution and sensitivity attained by the chirped pulse Fourier transform microwave spectroscopy CP-FTMW have provided the first conformational map of the simplest phenolic acids of trans-cinnamic and p-coumaric. Two conformers of trans-cinnamic acid and four conformers of trans-p-coumaric acid have been characterized under the isolation conditions of a supersonic expansion. The spectroscopic constants derived from the analysis of the rotational spectra compared with those predicted theoretically provide an unmatched means to achieve an unambiguous identification of the observed species.

中文翻译：

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酚酸的构象图

激光烧蚀气化的好处以及chi脉冲傅里叶变换微波光谱仪CP-FTMW所获得的高分辨率和灵敏度为反肉桂酸和对香豆酸的最简单酚酸提供了第一个构象图。的构象异构体的两个反式-肉桂酸和四个构象反式- p香豆酸已经被表征的超音速膨胀隔离条件下。从旋转光谱分析中得出的光谱常数与理论上预测的光谱常数相比，提供了一种无可比拟的手段，可以实现对所观察物种的明确鉴定。