ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A photocatalytic green system for chemoselective reduction of nitroarenes
Moosa Ramdar, Foad Kazemi, and Babak Kaboudin
Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
Abstract: A highly efficient photocatalytic reduction of nitroarenes using TiO2/polyethylene glycol 400-water (TiO2/PEG–H2O) is reported. This system at deoxygenated and illuminated (sunlight or violet LED) conditions efficiently reduced nitroarenes using oxalic acid or ammonium formate as a sacrificial electron donor. Reducible functional groups such as chloro, hydroxy, flouro, bromo and carbonyl were intact under the optimized reaction conditions. The 0.1 and 0.5–1 mmol amount of nitroarenes was used under sunlight and violet LED (400 nm) irradiation, respectively. Reusability of the nanotitania was successfully carried out four times. The analyses of the recovered catalyst after five runs including TEM, XRD, TGA and CHN were done and results showed that PEG is located on TiO2; no change in morphology, crystallinity and particle sizes was observed.
Keywords: Violet LED; Sunlight; PEG-TiO2; Photocatalytic; Chemoselective; Green synthesis
Full paper is available at www.springerlink.com.
Chemical Papers 71 (6) 1155–1163 (2017)