A Novel Molecular Design Strategy for Efficient Two-Photon Absorption Materials

Author(s): Jun Kawamata , Yasutaka Suzuki .

Journal Name: Current Pharmaceutical Biotechnology

Volume 13 , Issue 14 , 2012

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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.

Keywords: Azulene, detuning energy, fluorophore, transition dipole moment, two-photon excitation microscopy, two-photon absorption, one-photon absorption (OPA), excitation photons, phenomenon, damping factor, electron donor (D), dimethylsulfoxide, chloroform, threedimensional (3D)

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Article Details

VOLUME: 13
ISSUE: 14
Year: 2012
Page: [2569 - 2574]
Pages: 6
DOI: 10.2174/138920101314151120122544
Price: $58

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