Hindered internal conversion in rigid media. Thermally nonequilibrated 3IL and 3CT emissions from [Cu(5-X-phen)(PPh3)2]+ and [Cu(4,7-X2-phen)(PPh3)2]+ systems in a glass at 77 K
formation of the homoleptic complex [Cu(1a)2]+ becomes very slow (5 days). Once formed, the homoleptic complexes [Cu(1a,b)2]+ do not exchange ligands even with phen added in excess because they are kinetically locked due to the large tert-butylphenyl substituents at the phenanthroline unit. The electronic absorption spectra of the homoleptic complexes [Cu(1a)2]+ and [Cu(1b)2]+ evidence a strongly different
[Cu(SP)(mmt)](0/)(-) < [Cu(dmp)(2)](2+/+), in agreement with the order of the smaller structural change between the copper(II) and copper(I) complexes due to the distorted tetragonal geometry. The dye-sensitized solar cells (DSSC) were constructed using the coppercomplexes as redox couples to compare the photoelectrochemical responses with those using the conventional I(3)(-)/I(-) couple. The light energy
蓝铜模型配合物[(-)-sparteine-N,N'](maleonitriledhiolato-S,S')copper ([Cu(SP)(mmt)])(0/)( -)、双(2,9-二甲基-1,10-菲咯啉)铜([Cu(dmp)(2)](2+/+))和双(1,10-菲咯啉)铜([Cu( phen)(2)](2+/+)) 已根据电子转移的 Marcus 理论,由从二茂铁衍生物的同源系列到铜 (II) 配合物的电子转移速率常数确定。所得电子自交换速率常数按以下顺序增加:[Cu(phen)(2)](2+/+) < [Cu(SP)(mmt)](0/)(-) < [Cu(dmp) )(2)](2+/+),与铜(II)和铜(I)配合物由于扭曲的四方几何形状而产生的较小结构变化的顺序一致。染料敏化太阳能电池 (DSSC) 是使用铜配合物作为氧化还原对构建的,以将光电化学反应与使用常规 I(3)(-)/I(-)
Possible intermediates of Cu(phen)-catalyzed C–O cross-coupling of phenol with an aryl bromide by in situ ESI-MS and EPR studies
Cu(phen) complexes were observed in the copper(i)-catalyzed C–O coupling reaction using K2CO3 as the base and phen as the ligand under the catalytic reaction conditions by in situ electrospray ionization mass spectrometry (ESI-MS) and EPR analysis.
Mechanistic Insight into the Cu-Catalyzed C<i>–</i>S Cross-Coupling of Thioacetate with Aryl Halides: A Joint Experimental–Computational Study
作者:Silvia M. Soria-Castro、Diego M. Andrada、Daniel A. Caminos、Juan E. Argüello、Marc Robert、Alicia B. Peñéñory
DOI:10.1021/acs.joc.7b01991
日期:2017.11.3
activation mechanism using radical probes was undertaken. No evidence of the presence of radical species was found during the reaction process, which is consistent with an oxidative addition cross-coupling pathway. The different reaction pathways leading to the experimentally observed reaction products were studied by DFT calculation. The oxidative addition–reductive eliminationmechanism via an unstable
Chemical model of oxidases. CuI-catalyzed oxidation of secondary alcohols by dioxygen
作者:A. M. Sakharov、I. P. Skibida
DOI:10.1007/bf00707215
日期:1995.10
Oxidation of secondaryalcohols (2-propanol, 2-butanol, and cyclohexanol) by dioxygen, catalyzed by CuI ando-phenanthroline complexes, in the presence of alkali, was studied. The conditions under which oxidative dehydrogenation of secondaryalcohols result in fast formation of ketones as the only primary oxidation products were found. Bis-phenanthrolinates [Cu(phen)2]+ are the active forms of the catalyst