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Recyclable and Stable Porphyrin-Based Self-Assemblies by Electrostatic Force for Efficient Photocatalytic Organic Transformation
Department of Chemistry-Ångström Lab, Uppsala University, Box 523, Uppsala, SE 751 20, Sweden.
Department of Chemistry-Ångström Lab, Uppsala University, Box 523, Uppsala, SE 751 20, Sweden.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.
Department of Chemistry-Ångström Lab, Uppsala University, Box 523, Uppsala, SE 751 20, Sweden.
2024 (English)In: Advanced Science, E-ISSN 2198-3844, Vol. 11, no 21, article id 2308469Article in journal (Refereed) Published
Abstract [en]

Development of efficient, stable, and recyclable photocatalysts for organic synthesis is vital for transformation of traditional thermal organic chemistry into green sustainable organic chemistry. In this work, the study reports an electrostatic approach to assemble meso-tetra (4-sulfonate phenyl) porphyrin (TPPS)tetra (4-sulfonate phenyl) porphyrin (TPPS) as a donor and benzyl viologen (BV) as an acceptor into stable and recyclable photocatalyst for an efficient organic transformation reaction – aryl sulfide oxidation. By use of the electrostatic TPPS-BV photocatalysts, 0.1 mmol aryl sulfide with electron-donating group can be completely transformed into aryl sulfoxide in 60 min without overoxidation into sulfone, rendering near 100% yield and selectivity. The photocatalyst can be recycled up to 95% when 10 mg amount is used. Mechanistic study reveals that efficient charge separation between TPPS and BV results in sufficient formation of superoxide which further reacts with the oxidized sulfide by the photocatalyst to produce the sulfoxide. This mechanistic pathway differs significantly from the previously proposed singlet oxygen-dominated process in homogeneous TPPS photocatalysis.

Place, publisher, year, edition, pages
Wiley , 2024. Vol. 11, no 21, article id 2308469
Keywords [en]
electrostatic assemblies, photoredox catalysis, porphyrin, superoxide, thioanisole
National Category
Physical Chemistry Organic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-366794DOI: 10.1002/advs.202308469ISI: 001181357300001PubMedID: 38460154Scopus ID: 2-s2.0-85186860392OAI: oai:DiVA.org:kth-366794DiVA, id: diva2:1983327
Note

QC 20250710

Available from: 2025-07-10 Created: 2025-07-10 Last updated: 2025-07-10Bibliographically approved

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