期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/ijms23084175
关键词
anion clusters; ultrasonic vibrator; gas phase; hydroxide photoelectron spectroscopy; mass spectroscopy
资金
- National Research Foundation of Korea [2021R1A4A1021950, 2016R1A5A1012966]
- National Research Foundation of Korea [2021R1A4A1021950] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study developed a new evaporation method using an ultrasonic nebulizer to obtain gas-phase molecules and investigated the spectroscopic properties of OH- anions and their water clusters, finding a decrease in the vertical electron-detachment energy for different clusters.
Investigating molecules in the gas phase is the only way to discover their intrinsic molecular properties; however, it is challenging to produce the gaseous phase of large-molecule chemicals. Thermal evaporation is typically used to convert molecules into gases, but it is still challenging to study ionic molecules in solutions in the gas phase. Electrospray ionization is one of the best methods to generate molecules in the gas phase, and it is uniquely capable of studying large biomolecules, including proteins. However, the molecular temperature required to study the spectroscopic properties of the molecules is very high. In this study, we developed a new, simple evaporation method using an ultrasonic nebulizer to obtain gas-phase molecules. Using this new equipment, we observed OH- anions and their water clusters in the gas phase and obtained their photoelectron spectra. We observed that the vertical electron-detachment energy (VDE) of OH- was 1.90 +/- 0.05 eV and the VDEs of its water clusters and OH- (H2O)(n) (n = 1-2) decreased to 1.50 +/- 0.05 eV (n = 1) and 1.30 +/- 0.05 eV (n = 2), respectively.
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