NOVEL ORGANOMETALLIC COMPOUNDS FOR NONLINEAR OPTICS - METAL SIGMA-PHENYL AND PYRIDYL ACETYLIDE COMPLEXES

Hyper-Rayleigh scattering is used to investigate the nonlinear optical properties of novel metal (ruthenium, nickel and gold) sigma-arylacet ylide complexes. The influence of the organometallic donor group and c onjugating bridge on the quadratic hyperpolarizability is studied. For all organic ligands, the addition of the metal (donor) group is shown to increase the static hyperpolarizability by a factor of 2, 4 and 7 for gold, nickel and ruthenium complexes, respectively. Moreover, repl acement of phenyl with a heterocyclic ring is demonstrated to enlarge the hyperpolarizability in the case of gold and ruthenium compounds.