Infrared spectroscopy of O&z.rad;− and OH− in water clusters: evidence for fast interconversion between O&z.rad;− and OH&z.rad;OH−Electronic supplementary information (ESI) available. See DOI: 10.1039/c7cp04577h

• Main Authors: Lengyel, Jozef, On ák, Milan, Herburger, Andreas, van der Linde, Christian, Beyer, Martin K
• Format: Journal Article
• Language: English
• Published: 27.09.2017
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c7cp04577h

We present infrared multiple photon dissociation (IRMPD) spectra of (H 2 O) n O&z.rad; − and (H 2 O) n OH − cluster ensembles for n&cmb.macr; 8 and 47 in the range of 2400-4000 cm −1 . Both hydrated ions exhibit the same spectral features, in good agreement with theoretical calculations. Decomposition of the calculated spectra shows that bands originating from H 2 O O&z.rad; − and H 2 O OH − interactions span almost the whole spectral region of interest. Experimentally, evaporation of OH&z.rad; is observed to a small extent, which requires interconversion of (H 2 O) n O&z.rad; − into (H 2 O) n -1 OH&z.rad;OH − , with subsequent H 2 O evaporation preferred over OH&z.rad; evaporation. The modeling shows that (H 2 O) n O&z.rad; − and (H 2 O) n -1 OH&z.rad;OH − cannot be distinguished by IRMPD spectroscopy. We present infrared multiple photon dissociation (IRMPD) spectra of (H 2 O) n O&z.rad; − and (H 2 O) n OH − cluster ensembles for n&cmb.macr; 8 and 47 in the range of 2400-4000 cm −1 .