Quantitative and Theoretical Analysis of PHB-Hole Feature under Applying Electric Field.

Abstract

We have investigated the stark effect on the spectral hole characteristics in the photochemical hole burning systems of anthraquinone derivatives, such as, 1,4-dihydroxyanthraquinone (HAQ) and 4-amino-2,6-bis(4-butylphenoxy)1,5-dihydroxyanthraquinone (ABDAQ) as guest molecules embedded in host polymers such as 2-hydroxyethyl methacrylate (PHEMA) or poly(vinyl butyral) (PVB)1-3). Consequently, we evaluated the dipole moment differences |δμ| of guest molecules. These dipole moment differences depended on the characteristics of the guest and host molecules. This material dependence of the dipole moment differences was able to be explained qualitatively by Hammett’s substituent constant and the Taft’s polar substituent constant3).