Selective photocatalytic oxidation of aromatic alcohols to aldehydes with air by magnetic WO₃ZnO/Fe₃O₄. In situ photochemical synthesis of 2-substituted benzimidazoles

Abstract

WO3ZnO/Fe3O4 is used as a magnetic photocatalyst in the preparation of 2-substituted benzimidazoles in EtOH at RT. The key feature is the in situ photocatalytic oxidation of benzyl alcohols to benzaldehydes under atmospheric air in the absence of further oxidant.

Eco-friendly synthesis of chromeno[4,3-b]chromenes with a new photosensitized WO3/ZnO@NH2-EY nanocatalyst

“…Moreover, the weak bands at 943 and 948 cm À1 are related to W]O bonds in the octahedral WO 3 . 64,65 The graing of the amine group on the surface of WO 3 /ZnO can be approved by the observation of the corresponding aliphatic bands in 2900 and 3400 cm À1 . 66 The appearance of the EY characteristic bands in the FT-IR of WO 3 / ZnO@NH 2 -EY proved that the structure of EY is unchanged aer immobilization.…”

Review of the Advancements on Polymer/Metal Oxide Hybrid Nanocomposite‐Based Adsorption Assisted Photocatalytic Materials for Dye Removal

“…Hence, it causes a shortage of photoactivated species to bind dye molecules. [55][56][57] The solution's pH strongly affects the reaction by changing the charge of the species present in the reaction bath. Commonly, the photocatalytic medium is a solution.…”

One-pot multicomponent green LED photoinduced synthesis of chromeno[4,3-b]chromenes catalyzed by a new nanophotocatalyst histaminium tetrachlorozincate

“…Therefore, chemists have promoted photochemical reactions as an interesting led in organic synthesis. [8][9][10] Among many advantages of photochemical reactions, traditional UV light sources have signicant drawbacks including various technical complications, energy intensive nature, limited lifetime and considerable requirements due to dissipation of heat generated from the light source. In addition, the energy of a UV photon is generally in the range of carbon-carbon s bonds, which induces problematic complications and may result in various unwanted photo induced decomposition reactions and the generation of obscure optical polymeric materials on the reactor wall.…”