Abstract
In the experiment of antiphotofading of DVD-R optical recording disc, a 3000 W xenon light (λ = 420 nm) was adopted for testing the parameters of a novel cyanine-TCNQ (tetracyanoquinodimethane) charge transfer complex as a recording layer. Its performance without addition of a singlet oxygen quencher under illumination of 1200 min still satisfies with the DVD-R media requirements (3T CNR ≧ 45 dB; Reflectance ≧ 45%). Improved photostability in this modified cyanine dye is explained by a two-step photoinduced electron transfer (2-step PET) process between intramolecular Donor (Cyanine)-Acceptor (TCNQ) couple.