Process for photocatalysis and two-electron mixed-valence complexes
申请人:Nocera Daniel G.
公开号:US06863781B2
公开(公告)日:2005-03-08
Embodiments for the invention include a process for the production of hydrogen comprising a protic solution, a photocatalyst capable of a two-electron reduction of hydrogen ions; and a coproduct trap. The embodiment includes exposing the reaction medium to radiation capable of photoexciting the photocatalyst to produce hydrogen. The protic solution may comprise at least one of hydrohalic acid, a silane, and water, and the hydrohalic acid may be hydrochloric acid, hydrogen bromide, hydrogen fluoride or hydrogen iodide. The present application also describes novel transition metal compounds. Embodiments of the compounds include a compound comprising two transition metal atoms, wherein the transition metal atoms are in a two-electron mixed valence state and at least one transition metal is not rhodium; and at least one ligand capable of stabilizing the transition metal atom in a two-electron mixed valence state.
Studies of phosphorus–phosphorus nuclear-spin coupling in species with phosphorus–nitrogen bonds
作者:Ian J. Colquhoun、William McFarlane
DOI:10.1039/dt9770001674
日期:——
used to study 34 organophosphorus spacies with a P–N–P skeleton. The geminal 31P–31P coupling constant is large and positive in derivatives of three-co-ordinate phos-phorus and is increased by bulky or electronegative substituents on phosphorus. The results for several pairs of diastereoisomers, and also the temperature dependence, indicate a strong conformational dependence of the coupling which is
Effects of ligand and metal on the reductive elimination of dihydrogen by dinuclear complexes of chromium and manganese
作者:Thomas E. Bitterwolf、Krishnan S. Raghuveer
DOI:10.1016/s0020-1693(00)80450-8
日期:1990.6
all but one of the dinuclear chromium compounds. The relative rate of dihydrogen formation by the chromium compounds was found to be dependent upon the metal basicity which is dictated by the electronic character of the diphosphine ligand. The manganese derivative slowly eliminates dihydrogen under strong acid conditions. Deuterated acids have been shown to react with the dinuclear compounds to liberate
Chemistry of bis(dialkoxyphosphino)methylamines. Mono- and bimetallic complexes of chromium(0), molybdenum(0), tungsten(0), rhodium(I), and ruthenium(II)
作者:Joel T. Mague、M. Pontier Johnson
DOI:10.1021/om00118a057
日期:1990.4
Cationic complexes of rhodium(I) and iridium(I) with methyl- and phenylbis(dimethoxyphosphino)amine