| Title |
Fullerene soot and a fullerene nanodispersion as recyclable heterogeneous off-the-shelf photocatalysts |
| Authors |
Jozeliūnaitė, Augustina ; Valčeckas, Domantas ; Orentas, Edvinas |
| DOI |
10.1039/D0RA10147H |
| Full Text |
|
| Is Part of |
RSC advances.. Cambridge : Royal Society of Chemistry (RSC). 2021, vol. 11, iss. 7, p. 4104-4111.. eISSN 2046-2069 |
| Abstract [eng] |
Metal-free heterogeneous photocatalysis, which requires no prior catalyst immobilization or chemical modification and can operate in green solvents, represents a highly-sought after, yet currently still underdeveloped, synthetic method. In this report we present a comparative study which aims to evaluate the use of unmodified fullerene soot and a fullerene nanodispersion as non-soluble and quasi-soluble carbon-based photocatalysts, respectively, for sulfide oxidation and other transformations using oxygen as an oxidant in ethanol. A wide range of sulfoxides were successfully prepared with good yields and chemoselectivity using a very low catalyst loading. The fullerene soot photocatalyst is easily recovered and shows excellent stability of the catalytic properties. The reaction was shown to proceed via a singlet oxygen pathway and has a high selectivity for aliphatic sulfides, whereas the oxidation of thioanisoles can be accomplished using an amine mediated electron transfer mechanism. The applicability of the fullerene nanodispersion as a general purpose photocatalyst was demonstrated in radical cyclization, boronic acid oxidation and imine formation reactions. |
| Published |
Cambridge : Royal Society of Chemistry (RSC) |
| Type |
Journal article |
| Language |
English |
| Publication date |
2021 |
| CC license |
|
