4.5 Article

Combinational Vibration Modes in H2O/HDO/D2O Mixtures Detected Thanks to the Superior Sensitivity of Femtosecond Stimulated Raman Scattering

期刊

JOURNAL OF PHYSICAL CHEMISTRY B
卷 127, 期 21, 页码 4843-4857

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.3c01334

关键词

-

向作者/读者索取更多资源

Overtones and combinational modes are important in ultrafast vibrational energy relaxation in liquid water, but they are weak and often overlap with fundamental modes in isotopologues mixtures. We used femtosecond stimulated Raman scattering (FSRS) to measure the Raman spectra of H2O and D2O mixtures and compared the results with calculated spectra. We identified specific modes and bands and their contributions, which can provide insight into Raman spectra interpretation and vibrational relaxation pathways in isotopically diluted water systems.
Overtones and combinational modes frequently play essentialrolesin ultrafast vibrational energy relaxation in liquid water. However,these modes are very weak and often overlap with fundamental modes,particularly in isotopologues mixtures. We measured VV and HV Ramanspectra of H2O and D2O mixtures with femtosecondstimulated Raman scattering (FSRS) and compared the results with calculatedspectra. Specifically, we observed the mode at around 1850 cm(-1) and assigned it to H-O-D bend + rockinglibration. Second, we found that the H-O-D bend overtoneband and the OD stretch + rocking libration combination band contributeto the band located between 2850 and 3050 cm(-1).Furthermore, we assigned the broad band located between 4000 and 4200cm(-1) to be composed of combinational modes of high-frequencyOH stretching modes with predominantly twisting and rocking librations.These results should help in a proper interpretation of Raman spectraof aqueous systems as well as in the identification of vibrationalrelaxation pathways in isotopically diluted water.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据