Autor: |
Yang-Yang Zhang, Chong Wang, Gang Li, Xiangyu Zang, Yong Yu, Han-Shi Hu, Jiayue Yang, Weiqing Zhang, Dongxu Dai, Guorong Wu, Ling Jiang, Xueming Yang, Jun Li |
Jazyk: |
angličtina |
Rok vydání: |
2022 |
Předmět: |
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Zdroj: |
Cell Reports Physical Science, Vol 3, Iss 2, Pp 100748- (2022) |
Druh dokumentu: |
article |
ISSN: |
2666-3864 |
DOI: |
10.1016/j.xcrp.2022.100748 |
Popis: |
Summary: As a key species in understanding the hydrogen-bonding network transitions between liquid water and ice, the neutral water heptamer is a challenging experimental target, owing to the richness of low-lying isomers. Here, we report the size-specific infrared spectra of confinement-free, neutral water heptamer (H2O)7 based on threshold photoionization using a tunable vacuum ultraviolet free electron laser. The complexity of the observed spectra indicates that many nearly isoenergetic isomers are present at finite temperatures. Two classes of prism- and cage-like structures are identified in a high-pressure pulsed supersonic expansion of water heptamer, in which the former is favored energetically at low temperatures and serves as a major contributor to the experimental spectrum. These findings provide key information for filling the gap between well-studied water hexamer and octamer. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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