Phosphine oxides as novel acceptor groups in molecules presenting non-linear optical properties

摘要: In search for molecules possessing high hyperpolarizabilities, β, the diphenylphosphine oxide group is used as a novel acceptor. Three phosphorus model compounds were synthesized and their non-linear optical (NLO) properties investigated. The results obtained from EFISH measurements are complemented by semi-empirical calculations performed with AM1 hamiltonian method taking account of angle, θ, between dipole moment, µ, vector part tensor, β. Their efficiencies [βx(O)=38–63 × 10–30 esu] make these interesting potential use NLO materials.