Effects of heavy atom perturber and organic solvent on non-protected room temperature phosphorescence of alpha-naphthalenyloxyacetic acid

A strong and stable room temperature phosphorescence (RTP) signal of alpha- naphthalenyloxyacetic acid(alpha-NOA) aqueous solution can be induced only by using Na2SO3 as deoxidizer and KI(or TlNO3) as heavy atom perturber, The maximum phosphorescence intensity wavelengths are lambda(cx)/lambda(cm) = 287/495, 521 nm(or lambda(cx)/lambda(cm) = 297/494, 521 nm) when KI(or TlNO 3) as heavy atom perturber. Though the RTP signal is lower with KI as heavy atom perturber than that with TlNO3, but the analytical characteristics of the former is better than that of the latter. The kind and amount of organ ic solvent added to the system have a strong effect on the RTP intensity, i rradiating time required to acquire stable RTP signal and the choice of hea vy atom perturber.