63378-87-0Relevant academic research and scientific papers
A Nanocrystal Catalyst Incorporating a Surface Bound Transition Metal to Induce Photocatalytic Sequential Electron Transfer Events
Beard, Matthew C.,Chen, Xihan,Han, Chuang,Lin, Yixiong,Martin, Jovan San,Miller, Collin,Wang, Xiaoming,Yamamoto, Nobuyuki,Yan, Yanfa,Yan, Yong,Yazdi, Sadegh,Zeng, Xianghua
supporting information, p. 11361 - 11369 (2021/08/16)
Heterogeneous photocatalysis is less common but can provide unique avenues for inducing novel chemical transformations and can also be utilized for energy transductions, i.e., the energy in the photons can be captured in chemical bonds. Here, we developed a novel heterogeneous photocatalytic system that employs a lead-halide perovskite nanocrystal (NC) to capture photons and direct photogenerated holes to a surface bound transition metal Cu-site, resulting in a N-N heterocyclization reaction. The reaction starts from surface coordinated diamine substrates and requires two subsequent photo-oxidation events per reaction cycle. We establish a photocatalytic pathway that incorporates sequential inner sphere electron transfer events, photons absorbed by the NC generate holes that are sequentially funneled to the Cu-surface site to perform the reaction. The photocatalyst is readily prepared via a controlled cation-exchange reaction and provides new opportunities in photodriven heterogeneous catalysis.
One-step Synthesis of Cyclic Compounds by Electrochemical Reduction of Unsaturated Compounds in the Presence of Dielectrophiles
Degrand, Chantal,Compagnon, Paul-Louis,Belot, Gerard,Jacquin, Dominique
, p. 1189 - 1196 (2007/10/02)
The one-step synthesis of cyclic compounds is achieved in a few cases by electroreduction of unsaturated compounds in DMF, at a mercury pool cathode, in the presence of a more difficulty reducible dielectrophile.Unsaturated compounds include activated olefins, aromatic Schiff bases, ketones, and azo, nitroso, and nitro compounds.Four dielectrophiles are used; they are tri- or tetramethylene bromide, succinyl chloride, and 4-bromobutyryl chloride.The electrochemical synthesis of derivatives of cyclohexane, piperidine, pyrrolidine, hexahydropyridazine, tetrahydropyridazinone, tetrahydropyridazinedione, tetrahydrooxazine, isoxazolidine, and spirolactone can be succesfully performed.Their yields range from 8 to 78percent depending on competitive reactions.Results of chemical reduction by alkali metals and electrochemical reduction are compared.
