Photoluminescence of tetrachloroarsenate(III)

Abstract

Glasses of (NBu4)AsCl4 in ethanol at 77 K show a red emission at λmax=617 nm with Ø≈ 10−4 and τ=0.46 μs. It is suggested that this luminescence originates from the sp excited state 3P1 of the As3+ ion. The excited state properties of AsCl−4 are discussed in comparison to those of SbCl−4 and BiCl−4.