Hyper‐Raman spectral signatures of structured and de‐structured hydrogen‐bonded water. (19th April 2022)

• Record Type: Journal Article
• Authors: Korepanov, Vitaly; Yu, Chun‐Chieh; Hamaguchi, Hiro‐o
• Other Names: Yamaguchi Shoichi guestEditor.; Tsenkova Roumiana guestEditor.; Hamaguchi Hiro‐o guestEditor.
• Is Part Of: Journal of Raman spectroscopy. Volume 53:Number 10(2022)
• Page Start: 1666
• Page End: 1668
• Publication Date: 2022-04-19
• Subjects: hyper‐Raman spectroscopy -- intermolecular vibrations -- librations -- liquid water; Raman spectroscopy -- Periodicals; 535.846
• DOI: 10.1002/jrs.6359
• Languages: English
• ISSNs: 0377-0486

Abstract

Abstract: Hyper‐Raman (HR) spectra of liquid water have been measured in the temperature range from 15 to 45°C. A total of 76 spectra obtained at an interval of about 0.5°C are analyzed by singular value decomposition (SVD) and multivariate curve resolution with alternate least squares (MCR‐ALS) analyses. Obtained temperature‐dependent HR spectra are univocally decomposed into two components, corresponding to de‐structured hydrogen‐bonded water (DH water) and structured hydrogen‐bonded water (SH water). The results are in complete agreement with those of Raman spectroscopy, supporting the understanding that SH water and DH water coexist in thermal equilibrium in ambient liquid water. Abstract : Hyper‐Raman spectra of liquid water in the temperature range from 15 to 45°C can be decomposed into two components, corresponding to de‐structured hydrogen‐bonded water (DH water) and structured hydrogen‐bonded water (SH water). These results reinforce previous infrared and Raman studies.