Ruthenium(ii) ammine centres as efficient electron donor groups for quadratic non-linear optics

Abstract

Ruthenium(II) complex salts trans-[Ru(NH₃)₄(L^D)- (L^A)][PF₆]₃ (L^D = an N-donor ligand, L^A = a 4,4′-bipyridinium ligand) exhibit large, tunable static first hyperpolarizabilities β₀ which are associated with intense, visible metal-to-ligand charge-transfer excitations.

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