A cobalt Schiff base complex on TiO2 nanoparticles as an effective synergistic nanocatalyst for aerobic C–H oxidation. Issue 30 (7th March 2016)

• Record Type: Journal Article
• Authors: Jafarpour, Maasoumeh; Kargar, Hossein; Rezaeifard, Abdolreza
• Is Part Of: RSC advances. Volume 6:Issue 30(2016)
• Page Start: 25034
• Page End: 25046
• Publication Date: 2016-03-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra27520b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A cobalt Schiff base complex on TiO2 nanoparticles possess excellent photocatalytic properties under visible light for the aerobic benzylic C–H oxidation. Abstract : A novel visible light active TiO2 nanoparticle was produced by functionalization with a cobalt Schiff base complex under ultrasonic agitation. It was characterized by different techniques such as FT-IR, EDX, XPS, ICP-AES and TGA. The particle size of the synthesized nanocomposite was found to be in the range of 22–32 nm according to TEM images. A red-shift of the band-edge and a significant reduction of the band-gap (2.9 eV) were revealed by UV-DRS. The as-prepared nanocomposite demonstrated high oxidation activity and desired selectivity in the aerobic benzylic C–H oxidation of a structurally diverse set of alcohols and benzylic hydrocarbons. A synergistic effect of the cobalt Schiff base complex and TiO2 nanoparticles on the visible-light photocatalytic activity was explored. Spectral results and leaching experiments revealed that the heterogeneous catalyst preserved its structure after many reuses.