Observation of the Charge Resonance Band of Hemibonded (H 2 O) 2 + in the Gas Phase
Open Access
- 19 June 2026
- journal article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry Letters
- Vol. 17 (26) , 7322-7327
Abstract
Electronic spectroscopy of (H2O)n+ (n = 2 and 3) radical cluster cations was investigated in the ultraviolet-visible region. For (H2O)2+, the charge resonance band attributable to the hemibonded isomer, an elusive species previously observed spectroscopically only in helium droplets, was identified in the gas phase. This observation establishes electronic spectroscopy as a sensitive probe of hemibonded structures in water radical cations.Keywords
Funding Information
- Division of Chemistry (CHE-2404883)
- Japan Society for the Promotion of Science (21H04671)
- Japan Society for the Promotion of Science (25K03402)
- Japan Society for the Promotion of Science (26K01454)
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