Optical properties of transition-metal complexes

Bella SD (2001) Second-order nonlinear optical properties of transition metal complexes. Chem Soc Rev 30 355-366... 

Experimental measurements of the optical absorption spectra and magnetic properties of transition-metal complexes provide a critical test of the validity of crystal field theory. The theory makes specific predictions about the strengths of crystal fields produced by different ligands. Charged ligands such as the halides... 

Excellent reviews of the optical properties of transition metal ion complexes with amino acids and peptides have appeared (Hawkins, 1971 Martin, 1974, pp. 129-156 Richardson, 1979a, pp. 107-160). 

While the chemical interpretation of the e parameters is a matter of real concern to us, there are also several other difficulties which are, however, more apparent than real. Consider the question of the calculation of magnetic properties in transition metal complexes - paramagnetic susceptibilities and e.s.r. g values. In contrast to the study of eigenvalues for optical transition energies, these require descriptions of the wavefunc-tions after the perturbation by the ligand field, interelectron repulsion and spin-orbit coupling effects. In susceptibility calculations it is customary to use Stevens orbital reduction factor k in the magnetic moment operator... 

A rather new field emerging in organogold research is the study of luminescence and phosphorescence phenomena, associated in most cases with An An secondary bonding. The optical properties and the mechanism of the excitation and emission are stiU poorly understood, but may provide a new basis for applications (see Photochemistry of Transition Metal Complexes). 

This chapter deals with studies on the photophysical properties of selected metal complexes and their multinuclear assemblies reported in literature in the period January 2013 to December 2014, The transition metal species considered here belong to families of complexes featuring largely studied optical properties. The complexes are from the following metal centres Cu(i), Ag(i), Au(i), Zn(ii), Cd(ii), Hg(ii), Re(i), Ru(ii), Os(ii), Ir(iii), Pt(ii) and Pd(ii) finally some example is given of lanthanide (Ln) complexes. 

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