A comparison of the pentaammine(pyridyl)ruthenium(ii) and 4-(dimethylamino)phenyl groups as electron donors for quadratic non-linear optics
Abstract
Hyper-Rayleigh scattering and Stark spectroscopic studies show
that the complex salts [1–4]PF6 have larger static first
hyperpolarizabilities β0 than [5–8]PF6,
because the higher HOMO energy of a
{RuII(NH3)5}2+ centre
more than offsets the superior π-orbital overlap in the purely organic