2802-07-5Relevant articles and documents
High-Throughput Screening of Earth-Abundant Water Reduction Catalysts toward Photocatalytic Hydrogen Evolution
Motz, Rachel N.,Lopato, Eric M.,Connell, Timothy U.,Bernhard, Stefan
supporting information, p. 774 - 781 (2021/02/05)
Noble-metal photosensitizers and water reduction co-catalysts (WRCs) still present the highest activity in homogeneous photocatalytic hydrogen production. The search for earth-abundant alternatives is usually limited by the time required to screen new catalyst combinations; however, here, we utilize newly designed and developed high-throughput photoreactors for the parallel synthesis of novel WRCs and colorimetric screening of hydrogen evolution. This unique approach allowed rapid optimization of photocatalytic water reduction using the organic photosensitizer Eosin Y and the archetypal cobaloxime WRC [Co(GL1)2pyCl], where GL1 is dimethylglyoxime and py is pyridine. Subsequent combinatorial synthesis generated 646 unique cobalt complexes of the type [Co(LL)2pyCl], where LL is a bidentate ligand, that identified promising new WRC candidates for hydrogen production. Density functional theory (DFT) calculations performed on such cobaloxime derivative complexes demonstrated that reactivity depends on hydride affinity. Alkyl-substituted glyoximes were necessary for hydrogen production and showed increased activity when paired with ligands containing strong hydrogen-bond donors.
Catalytic effect of wet molecular sieve 3A in dry media on syntheses of oximes and 1,3-dioximes
Bigdeli, Mohammadali,Rahmati, Abbas
, p. 605 - 607 (2007/10/03)
A simple, efficient and eco-friendly method has been developed for the condensation of hydroxylamine hydrochloride with aldehydes, ketones and 1,3-diketones in the presence of powdered molecular sieves (3A) as catalyst. Aldoximes, ketoximes and 1,3-dioximes were obtained in excellent yields.
