论文标题
二进制CHBR3-MEOH溶剂混合物的2D拉曼-THZ光谱
2D Raman-THz spectroscopy of binary CHBr3-MeOH solvent mixture
论文作者
论文摘要
混合二维（2D）拉曼 - terahertz光谱用于测量二进制CHBR3-MEOH混合物中两个溶剂对之间的相互作用，在1-7 THz的频率范围内。监测交叉峰签名的变化，源自CHBR3的分子内弯曲模式到混合物的集体分子间自由度。用MeOH摩尔分数为0.3的溶剂混合物测得的2D频谱中新的横峰的出现表明，由于两个溶剂之间的氢键相互作用，形成了新的低频模式。该解释得到了CHBR3-CS2二元溶剂混合物的测量以及通过Neateat MeOH的一维吸收测量值的测量。
Hybrid two-dimensional (2D) Raman-terahertz spectroscopy is used to measure the interactions between two solvents pair in the binary CHBr3-MeOH mixture in the frequency range of 1-7 THz. Changes in the cross peak signature are monitored, originating from the coupling of an intramolecular bending mode of CHBr3 to the collective intermolecular degrees of freedom of the mixture. The appearance of a new cross peak in the 2D spectrum measured for solvent mixture with MeOH molar fraction of 0.3 indicates a coupling to a new set of low-frequency modes formed due to the hydrogen bond interactions between the two solvents. This interpretation is supported by the measurement of the CHBr3-CS2 binary solvent mixture as well as by 1D absorption measurements of neat MeOH.
