Oil foams stabilized by POSS/organosilica particle assemblies: application for aerobic oxidation of aromatic alcohols. Issue 18 (6th April 2022)

• Record Type: Journal Article
• Authors: Zhang, Shi; Dedovets, Dmytro; Pera-Titus, Marc
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 18(2022)
• Page Start: 9997
• Page End: 10003
• Publication Date: 2022-04-06
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta00667g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Oil foams stabilized by a dual particle system combining surface-active catalytic organosilica particles and amphiphilic polyhedral oligomeric silsesquioxanes afford high catalytic activity in the aerobic oxidation of pure aromatic alcohols. Abstract : A novel amphiphilic polyhedral oligomeric silsesquioxane (POSS) with surfactant-like behavior was synthesized. By combining this new POSS, used as a frother, with surface-active catalytic organosilica particles, used as a stabilizer, we designed a dual particle system able to generate foams in pure organic solvents. Tunable foamability and foam stability were achieved in a variety of organic solvents by simply adjusting the POSS concentration. As a result, the catalytic activity was drastically boosted in the aerobic oxidation of pure aromatic alcohols under 1 bar O2 pressure. Particles were conveniently recycled with high foamability and the catalytic efficiency was maintained for at least 7 consecutive runs.