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Enlightening developments in 1,3-P,N-ligand-stabilized multinuclear complexes: A shift from catalysis to photoluminescence
摘要： 1,3-P,N-ligands provide the ideal spatial separation to facilitate homo and hetero metal-metal interactions to access multinuclear complexes. The rich chemistry of such complexes includes applications in coordination chemistry, metal-activation and (cooperative) catalysis. However, it has been especially the fruitful combination in photoluminescent P,N-coinage metal complexes which has renewed interest in these ligands. While the field classically focused on dinuclear species, now also coinage metal clusters have been studied for use in catalysis and photophysical applications. Reviewed are recent developments from 2009 to mid-2017.
关键词： P,N-ligands,Coinage metal clusters,Photoluminescence,Transition metal complexes,Homogeneous catalysis,Metal-metal bonds
更新于2025-09-23 15:23:52
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Europium-Catalyzed Aerobic Oxidation of Alcohols to Aldehydes/Ketones and Photoluminescence Tracking
摘要： Europium is a lanthanide rare-earth metal and is known as a key element in luminophore development. Since europium has two relatively stable oxidation states, Eu2+ and Eu3+, which is exceptional among the various lanthanide elements, we have developed a europium-catalyzed aerobic oxidation with external oxidants utilizing the redox cycle of Eu2+/Eu3+. The reaction was performed under mild conditions with a wide substrate scope. The photoluminescence spectra clearly demonstrate the oxidation state changes that occur during the presented europium-catalyzed aerobic oxidation.
关键词： europium,oxidation,redox cycle,photoluminescence,homogeneous catalysis
更新于2025-09-23 15:22:29
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Pyranopterin Related Dithiolene Molybdenum Complexes as Homogeneous Catalysts for CO <sub/>2</sub> Photoreduction
摘要： Two original dithiolenes, with a pyrazine ring fused with a pyran ring carrying the dithiolene chelate, mimicking molybdopterin (MPT) present in the active site of formate dehydrogenases (FDHs), have been synthesized. The first one mimicks MPT in the dihydropyrazine form while the second mimicks MPT in the more biologically relevant tetrahydropyrazine form. Both have been structurally characterized as a ligand within a cobalt(cyclopentadienyl)(dithiolene) complex. The corresponding MoO(dithiolene)2 complexes have been also prepared and are reported as the first functional and stable catalysts inspired by the Mo center of FDHs so far: they indeed catalyze the photoreduction of CO2 into formic acid, as the major product, and carbon monoxide, achieving more than 100 turnover numbers in about 8 h.
关键词： CO2 reduction,homogeneous catalysis,molybdenum complex,dithiolene ligands
更新于2025-09-23 15:22:29
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InP Quantum Dots-Based Electroluminescent Devices
摘要： A metal-free, intermolecular syn-addition of hexamethyldisilane across simple alkenes is reported. The catalytic cycle is initiated and propagated by the transfer of a methyl group from the disilane to a silylium-ion-like intermediate, corresponding to the (re)generation of the silylium-ion catalyst. The key feature of the reaction sequence is the cleavage of the Si–Si bond in a 1,3-silyl shift from silicon to carbon. A central intermediate of the catalysis was structurally characterized by X-ray diffraction, and the computed reaction mechanism is fully consistent with the experimental findings.
关键词： silylium ions,density functional calculations,homogeneous catalysis,alkenes,Si–Si activation
更新于2025-09-23 15:19:57