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Zhang, Bingbing; Yu, Yong; Zhang, Yang-Yang; Jiang, Shukang; Li, Qinming; Hu, Han-Shi; Li, Gang; Zhao, Zhi; Wang, Chong; Xie, Hua; Zhang, Weiqing; Dai, Dongxu; Wu, Guorong; Zhang, Dong H.; Jiang, Ling; Yang, Xueming
Proceedings of the National Academy of Sciences, 07/2020, Letnik: 117, Številka: 27Journal Article
Infrared spectroscopic study of neutral water clusters is crucial to understanding of the hydrogen-bonding networks in liquid water and ice. Here we report infrared spectra of size-selected neutral water clusters, (H₂O)n (n = 3–6), in the OH stretching vibration region, based on threshold photoionization using a tunable vacuum ultraviolet free-electron laser. Distinct OH stretch vibrational fundamentals observed in the 3,500–3,600-cm−1 region of (H₂O)₅ provide unique spectral signatures for the formation of a noncyclic pentamer, which coexists with the global-minimum cyclic structure previously identified in the gas phase. The main features of infrared spectra of the pentamer and hexamer, (H₂O)n (n = 5 and 6), span the entire OH stretching band of liquid water, suggesting that they start to exhibit the richness and diversity of hydrogenbonding networks in bulk water.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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