Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Shunichi Fukuzumi | * |
dc.date.accessioned | 2016-08-28T10:08:10Z | - |
dc.date.available | 2016-08-28T10:08:10Z | - |
dc.date.issued | 2013 | * |
dc.identifier.issn | 1477-9226 | * |
dc.identifier.other | OAK-9546 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/223258 | - |
dc.description.abstract | The storage and evolution of hydrogen are catalysed by appropriate metal hydride complexes. Hydrogenation of carbon dioxide by hydrogen is catalysed by a [C,N] cyclometalated organoiridium complex, [IrIII(Cp*)(4-(1H- pyrazol-1-yl-κN2)benzoic acid-κC3)(OH 2)]2SO4 [Ir-OH2]2SO 4, under atmospheric pressure of H2 and CO2 in weakly basic water (pH 7.5) at room temperature. The reverse reaction, i.e., hydrogen evolution from formate, is also catalysed by [Ir-OH2] + in acidic water (pH 2.8) at room temperature. Thus, interconversion between hydrogen and formic acid in water at ambient temperature and pressure has been achieved by using [Ir-OH2]+ as an efficient catalyst in both directions depending on pH. The Ir complex [Ir-OH 2]+ also catalyses regioselective hydrogenation of the oxidised form of β-nicotinamide adenine dinucleotide (NAD+) to produce the 1,4-reduced form (NADH) under atmospheric pressure of H2 at room temperature in weakly basic water. In weakly acidic water, the complex [Ir-OH2]+ also catalyses the reverse reaction, i.e., hydrogen evolution from NADH to produce NAD+ at room temperature. Thus, interconversion between NADH (and H+) and NAD+ (and H2) has also been achieved by using [Ir-OH2]+ as an efficient catalyst and by changing pH. The iridium hydride complex formed by the reduction of [Ir-OH2]+ by H2 and NADH is responsible for the hydrogen evolution. Photoirradiation (λ > 330 nm) of an aqueous solution of the Ir-hydride complex produced by the reduction of [Ir-OH2]+ with alcohols resulted in the quantitative conversion to a unique [C,C] cyclometalated Ir-hydride complex, which can catalyse hydrogen evolution from alcohols in a basic aqueous solution (pH 11.9). The catalytic mechanisms of the hydrogen storage and evolution are discussed by focusing on the reactivity of Ir-hydride complexes. © The Royal Society of Chemistry 2013. | * |
dc.language | English | * |
dc.title | Hydrogen storage and evolution catalysed by metal hydride complexes | * |
dc.type | Review | * |
dc.relation.issue | 1 | * |
dc.relation.volume | 42 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 18 | * |
dc.relation.lastpage | 28 | * |
dc.relation.journaltitle | Dalton Transactions | * |
dc.identifier.doi | 10.1039/c2dt31823g | * |
dc.identifier.wosid | WOS:000312218100002 | * |
dc.identifier.scopusid | 2-s2.0-84870528619 | * |
dc.author.google | Fukuzumi S. | * |
dc.author.google | Suenobu T. | * |
dc.contributor.scopusid | Shunichi Fukuzumi(35430038100;58409757400) | * |
dc.date.modifydate | 20240401081001 | * |