title: A novel molecular design strategy for efficient two-photon absorption materials.
abstract: This paper describes a novel molecular design strategy for obtaining efficient two-photon absorption (TPA) materials. The most popular strategy for enhancing the TPA cross-section (σ(2)) of a molecule is to enhance its transition dipole moment. However, this strategy also red shifts the one-photon absorption (OPA) band. Consequently, molecules with large transition dipole moments typically exhibit strong OPA at visible wavelengths, making it difficult to use such molecules for TPA-related applications in the visible wavelength region. Therefore, an alternative molecular design principle for TPA materials to enhance the transition dipole moment is strongly required. The present paper describes a novel molecular design strategy for reducing the detuning energy by incorporating an azulenyl moiety in a large, planar π- electron system. This strategy enhances σ(2) without significantly red shifting the OPA band.
authors: Graduate School of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan. j_kawa@yamaguchi-u.ac.jp
authors: Jun
authors: J
authors: Kawamata
authors: Yasutaka
authors: Y
authors: Suzuki
mesh_terms: D000042:Absorption; D052176:Azulenes / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D055620:Optical Phenomena; D017785:Photons
chemical_list: D052176:Azulenes; D005456:Fluorescent Dyes