Detailed spectral studies of copper acetate: excited-state interactions in copper dimers

N-tripodal ligands to generate copper catalysts for the syndiotactic polymerization of methyl-methacrylate: Crystal structures of copper complexes

“…The distance of Cu 1 -Cu 1 * is 2.679 Å and the angle N 11 -Cu 1 -Cu 1 * is 176.64°and is nearly linear. This copper dimer conformation was already obtained from Cu(OAc) 2 salt and N containing ligands such as pyrazine [23] or triazol based ligand (d(Cu-N) = 2.167 Å ) [24]. It is interesting to note that acetate (OAc) are able to induce an anion-templating effect (paddle wheel lmode) in the solid state (see Fig.…”

Electronic structure of lower singlet states of binuclear copper acetate monohydrate

“…The variational space selected in this calculation is limited to the one that is appropriate to describe only d-d transitions, and CT states would not be predicted well by the present calculation. In this context, possible contribution of CT to band I1 (12)(13)(14) is not denied by the present calculation. More extensive calculation is desired for this purpose.…”

“…It has been tentatively assigned by various researchers: single 3d electron excitation (9, lo), double excitation of 3d electrons (1 I), and CT transition from ligands to copper (12,13). Recently, Ross et al (14) performed a detailed investigation of band I by the use of magnetic circular dichroism (MCD) and considered the spin-spin coupling between the two coppers in the excited states making up band I. They also discussed the assignment of band I1 (they called it the dimer band) and tentatively concluded that the band is due to CT from the ligands to the copper ion.…”

Copper Active Sites in Biology

“…These ground/excited state exchange couplings can, in principle, be observed in LF excited states. However, this has only been investigated in one case (see ref 53 ). Alternatively, if the sign and magnitude of D is measured experimentally, the electron spin dipolar contribution to D is subtracted off using equation 11, and the first term in equation 13 is assumed to dominate, then J x 2 -y 2 ,xy can be obtained from the EPR experiment.…”