Orbital Hybridization and Hypersensitivity of Eu3+ in YXO4 (X=P, As, V)

摘要

A comparative study of Eu3+ ion luminescence in YXO4 (X=P, As, V) with the tetragonal zircon structure is conducted in relation to the intensity of the hypersensitivity D-5(0) -> F-7(2) (Delta J = 2) transition. Both the asymmetry ratio, R = I(D-5(0) - F-7(2))/I(D-5(0) - F-7(1)), and the Judd-Ofelt Omega(2) intensity parameter increases in the order YPO4 F-7(2) transition in going from YPO4 to YAsO4 to YVO4 is consistent with the expectation of ligand dipolar polarization model for hypersensitivity which states that the oscillator strength of the D-5(0) -> F-7(2) transition is proportional to the square of the ligand dipolar polarizability. The connection between the mechanism of hypersensitivity and second harmonic generation (SHG) is presented. (c) 2023 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.