Quadratic Hyperpolarizabilities of Some Organometallic Compounds

Abstract
The nonresonant quadratic molecular hyperpolarizabilities of several classes of Organometallic aromatic compounds were studied with DC electric-field-induced second-harmonic generation (EFISH) experiments using fundamental radiation at 1.91 μm. Our goal is to survey and assess various strategies by which electron densities from metal centers can be exploited for quadratic nonlinear optics. Relying on optimized experimental techniques, systematic studies on structure-property relations concerning metal centers, bonding patterns, conjugations, and effects of ligands were conducted. Results on some arene metal carbonyl π-complexes, metal carbonyl pyridine derivatives, square-planar metal aromatics, and metallocene derivatives are included.

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