Mixed hetero-/homogeneous TiO2/N-hydroxyimide photocatalysis in visible-light-induced controllable benzylic oxidation by molecular oxygen

Mixed hetero-/homogeneous TiO2/N-hydroxyimide photocatalysis in visible-light-induced controllable benzylic oxidation by molecular oxygen Full article

Journal

Chinese Journal of Catalysis
ISSN: 0253-9837 , E-ISSN: 1872-2067

Output data

Year: 2021, Volume: 42, Number: 10, Pages: 1700-1711 Pages count : 12 DOI: 10.1016/s1872-2067(21)63831-7

Authors

Krylov Igor B. ^1,2 , Lopat’eva Elena R. ^1,2 , Subbotina Irina R. ² , Nikishin Gennady I. ² , Yu Bing ³ , Terent’ev Alexander O. ^1,2

Affiliations

1	Mendeleev University of Chemical Technology of Russia, Moscow 125047, Russian Federation
2	N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russian Federation
3	Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China

Homogeneous and heterogeneous types of catalysis are frequently considered as separate disciplines or even opposed to each other. In the present work, a new type of mixed hetero-/homogeneous catalysis was demonstrated for the case of selective alkylarene oxidation by molecular oxygen. The proposed catalytic system consists of two widely available components: N-hydroxyphthalimide (NHPI, a homogeneous organocatalyst for free-radical chain reactions) and nanosized TiO2 (heterogeneous UV-active photoredox catalyst). The interaction of NHPI with TiO2 allows for a shift from UV to visible light photoredox activity and generation of phthalimide-N-oxyl (PINO) radicals that diffuse into the solution where NHPI/PINO-catalyzed free-radical chain reaction can proceed without the additional light input providing a fundamental increase in energy efficiency. The NHPI/TiO2 ratio controls the selectivity of oxidation affording preferential formation of hydroperoxide or ketone from alkylarene.

Krylov I.B. , Lopat’eva E.R. , Subbotina I.R. , Nikishin G.I. , Yu B. , Terent’ev A.O.
Mixed hetero-/homogeneous TiO2/N-hydroxyimide photocatalysis in visible-light-induced controllable benzylic oxidation by molecular oxygen
Chinese Journal of Catalysis. 2021. V.42. N10. P.1700-1711. DOI: 10.1016/s1872-2067(21)63831-7 WOS Scopus OpenAlex

Web of science:	WOS:000664801000009
Scopus:	2-s2.0-85108424701
OpenAlex:	W3174429508

DB	Citing
OpenAlex	37
Scopus	43
Web of science	37