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Oral Sessions
Day 2, June 23（Mon.） 16:10-16:25
Room B (Maesato Center)
- 2B-O3-1610
Investigation of Microdroplet Chemistry with Mass Spectrometry
(Univ. Nankai)
oXinxing Zhang
Water is considered as an inert environment for the dispersion of many chemical systems. However, by simply spraying bulk water into micro-sized droplets, the water microdroplets have been shown to possess a large plethora of unique properties, including the abilities to accelerate chemical reactions by several orders of magnitude compared to the same reactions in bulk water, and/or to trigger spontaneous reactions that cannot occur in bulk water. A high electric field (~109 V/m) at the air-water interface of microdroplets has been postulated to be the probable cause of the unique chemistries. This high field can even oxidize electrons out of hydroxide ions or other closed-shell molecules dissolved in water, forming radicals and electrons. Subsequently, the electrons can trigger further reduction processes. In our lab, by showing a large number of such electron-mediated redox reactions, and by studying the kinetics of these reactions, we opine that the redox reactions on sprayed water microdroplets are essentially processes using electrons as the charge carriers. The potential impacts of the redox capability of microdroplets are also discussed in a larger context of synthetic chemistry and atmospheric chemistry.