Dissolved organic matter (DOM) is an important photosensitizer in natural waters, readily producing an array of reactive oxygen species. One of these species is singlet oxygen, which plays an important role in the degradation and cycling of pollutants and photoinactivation of microorganisms in natural waters. Yet, at this time, knowledge gaps remain that are related to the efficiency of singlet oxygen generation (i.e. quantum yield) by DOM depending on water characteristics (e.g. pH) and the wavelength of incident light. The use of time-resolved singlet oxygen phosphorescence to spectroscopically measure singlet oxygen quantum yields from DOM will be discussed and compared to previous measurement techniques. An emphasis will be placed on wavelength dependent singlet oxygen formation.

Singlet oxygen quantum yields of dissolved organic matter by time-resolved singlet oxygen phosphorescence

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.