title: Studying the oxidation of water to molecular oxygen in photosynthetic and artificial systems by time-resolved membrane-inlet mass spectrometry.
abstract: Monitoring isotopic compositions of gaseous products (e.g., H2, O2, and CO2) by time-resolved isotope-ratio membrane-inlet mass spectrometry (TR-IR-MIMS) is widely used for kinetic and functional analyses in photosynthesis research. In particular, in combination with isotopic labeling, TR-MIMS became an essential and powerful research tool for the study of the mechanism of photosynthetic water-oxidation to molecular oxygen catalyzed by the water-oxidizing complex of photosystem II. Moreover, recently, the TR-MIMS and (18)O-labeling approach was successfully applied for testing newly developed catalysts for artificial water-splitting and provided important insight about the mechanism and pathways of O2 formation. In this mini-review we summarize these results and provide a brief introduction into key aspects of the TR-MIMS technique and its perspectives for future studies of the enigmatic water-splitting chemistry.
authors: Department of Chemistry, Chemistry Biology Centre, Umeå University Umeå, Sweden.
authors: Dmitriy
authors: D
authors: Shevela
authors: Johannes
authors: J
authors: Messinger
keywords: O2 evolution; isotope labeling; isotope-ratio membrane-inlet mass spectrometry; photosynthetic and artificial water-splitting; photosystem II; water-oxidizing complex