Influence of Ligand Substitution on Excited State Structural Dynamics in Cu(I) Bisphenanthroline Complexes
作者:Jenny V. Lockard、Sanaz Kabehie、Jeffrey I. Zink、Grigory Smolentsev、Alexander Soldatov、Lin X. Chen
DOI:10.1021/jp102278u
日期:2010.11.18
those of Cu(I)bis(1,10-phenanthroline), [CuI(phen)2]+, and Cu(I)bis(2-9-dimethyl-1,10-phenanthroline), [CuI(dmp)2]+, model complexes to determine the influence of different substitution patterns of the phenanthroline ligand on the structural dynamics associated with the metal to ligand charge transfer excited states. Similarities between the [CuI(detp)2]+ and [CuI(phen)2]+ excited state lifetimes were observed
作者:Sanaz Kabehie、Mei Xue、Adam Z. Stieg、Monty Liong、Kang L. Wang、Jeffrey I. Zink
DOI:10.1021/ja103937v
日期:2010.11.17
Heteroleptic copper compounds have been designed and synthesized on solid supports. Chemical redox agents were used to change the oxidation state of the SiO2-immobilized heteroleptic copper compounds from Cu(I) to Cu(II) and then back to Cu(I). Optical spectroscopy of a dimethyl sulfoxide suspension demonstrated the reversibility of the Cu(I)/Cu(II) SiO2-immobilized compounds by monitoring the metal-to-ligand charge transfer peak at about 450 nm. Electron paramagnetic resonance spectroscopy was used to monitor the isomerization of Cu(I) tetrahedral to Cu(II) square planar. This conformational change corresponds to a 90 degrees rotation of one ligand with respect to the other. Conductive atomic force microscopy and macroscopic gold electrodes were used to study the electrical properties of a p(+) Si-immobilized heteroleptic copper compound where switching between the Cu(I)/Cu(II) states occurred at -0.8 and +2.3 V.