title: A novel optical ozone sensor based on purely organic phosphor.
abstract: An optical ozone sensor was developed based on the finding that a purely organic phosphor linearly loses its phosphorescence emission intensity in the presence of varying concentration of ozone gas and ozonated water. Compared to conventional conductance-based inorganic sensors, our novel sensory film has many advantages such as easy fabrication, low-cost, and portability. NMR data confirmed that phosphorescence drop is attributed to oxidation of the core triplet generating aldehyde group of the phosphor. We observed that linear correlation between phosphorescence and ozone concentration and it can detect ozone concentrations of 0.1 ppm that is the threshold concentration harmful to human tissue and respiratory organs. Like a litmus paper, this ozone sensor can be fabricated as a free-standing and disposable film.
authors.affiliation: Macromolecular Science and Engineering, ‡Department of Materials Science and Engineering, §Department of Chemical Engineering, and ∥Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Dongwook
authors.initials: D
authors.lastname: Lee
authors.forename: Jaehun
authors.initials: J
authors.lastname: Jung
authors.forename: David
authors.initials: D
authors.lastname: Bilby
authors.forename: Min Sang
authors.initials: MS
authors.lastname: Kwon
authors.forename: Jaesook
authors.initials: J
authors.lastname: Yun
authors.forename: Jinsang
authors.initials: J
authors.lastname: Kim
keywords: aldehyde oxidation; optical ozone sensor; organic phosphorescence