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Updated: Jan 31, 2026

Triplet Fusion Upconversion Nanocapsule Synthesis
Published on: September 7, 2022
Evidence for diffusing atomic oxygen uncovered by separating reactants with a semi-permeable nanocapsule barrier
Sara M Omlid1, Sergey A Dergunov, Ankita Isor
1Department of Chemistry, Saint Louis University, 3501 Laclede Ave., St. Louis, MO 63103, USA. ryan.mcculla@slu.edu.
Abstract:
Ground-state atomic oxygen [O(3P)] is an oxidant whose formation in solution was proposed but never proven. Polymer nanocapsules were used to physically separate dibenzothiophene S-oxide (DBTO), a source of O(3P), from an O(3P)-accepting molecule. Irradiation of polymer nanocapsules loaded with DBTO resulted in oxidation of the O(3P)-acceptor placed outside nanocapsules. The results rule out a direct oxygen atom transfer mechanism and are consistent with freely diffusing O(3P) as the oxidant.
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