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Spectroscopic snapshot for neutral water nonamer (H2O)9: Adding a H2O onto a hydrogen bond-unbroken edge of (H2O)8.

Authors :
Zheng, Huijun
Zhang, Yang-Yang
Wang, Tiantong
Jiang, Shuai
Yan, Wenhui
Wang, Chong
Zhao, Ya
Hu, Han-Shi
Yang, Jiayue
Zhang, Weiqing
Wu, Guorong
Dai, Dongxu
Li, Gang
Li, Jun
Yang, Xueming
Jiang, Ling
Source :
Journal of Chemical Physics. 1/7/2023, Vol. 158 Issue 1, p1-8. 8p.
Publication Year :
2023

Abstract

Structural characterization of neutral water clusters is crucial to understanding the structures and properties of water, but it has been proven to be a challenging experimental target due to the difficulty in size selection. Here, we report the size-specific infrared spectra of confinement-free neutral water nonamer (H2O)9 based on threshold photoionization, using a tunable vacuum ultraviolet free-electron laser. Distinct OH stretch vibrational fundamentals in the 3200–3350 cm−1 region are observed, providing unique spectral signatures for the formation of an unprecedented (H2O)9 structure evolved by adding a ninth water molecule onto a hydrogen bond-unbroken edge of the (H2O)8 octamer with D2d symmetry. This nonamer structure coexists with the five previously identified structures that can be viewed as derived by inserting a ninth water molecule into a hydrogen bond-broken edge of the D2d/S4 octamer. These findings provide key microscopic information for systematic understanding of the formation and growth mechanism of dynamical hydrogen-bonding networks that are responsible for the structure and properties of condensed-phase water. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
158
Issue :
1
Database :
Academic Search Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
161194039
Full Text :
https://doi.org/10.1063/5.0131217