Selective photooxidation of styrene in organic–water biphasic media

Citations Over Time

Abstract

The photooxidation of styrene by molecular oxygen was investigated in organic–water biphasic media at room temperature under UV light irradiation. The photoreaction gave a high selectivity (>90%) of the product, benzaldehyde, with a formative yield of 29%. This new method was also operative for the oxidation of several styrene derivatives, such as 3-methylstyrene, 4-methoxylstyrene, β-methylstyrene, and 1,1-diphenylethylene, into the corresponding aldehydes or ketones. It was demonstrated that both molecular oxygen and water were essential to these reactions. The mechanistic study revealed that the primary reaction involved mainly electron transfer from the excited styrene to triplet ground state molecular oxygen, forming the superoxide radical anion and styrene radical cation, followed by cleavage of the CC bond via an adduct intermediate in the presence of water.

Related Papers

• → Selective oxidation of styrene to benzaldehyde over VSB-5 and isomorphously substituted cobalt VSB-5(2006)35 cited
• → CONVERSION OF STYRENE INTO BENZALDEHYDE AND STYRENE EPOXIDE OVER MgCoAl-LDH CATALYSTS(2017)4 cited
• → Preparation of Benzaldehyde through Oxidation of Styrene Catalyzed by Metallo-deuteroporphyrin Dimethyl Esters(2013)1 cited
• → Impregnation Synthesized Cu@MIL‐101(Cr) Catalyzes the Oxidation of Styrene to Benzaldehyde with TBHP**(2022)1 cited
• Catalytic Oxidation of Styrene to Prepare Benzaldehyde over TiO_2/SiO_2(2008)