Fluorescence Study on Organic Nanoparticles Prepared with ABCV-Th

Abstract

We have synthesized a new red fluorescent material (2E, 2′E)-3,3′-[4,4″-bis(dimethylamino)-1,1′:4′,1″-terphenyl-2′,5′-diyl]bis[2-(2-thienyl)acrylonitrile] (ABCV-Th). Nonplanar structure of ABCV-Th resists on the concentration quenching, which is induced from dipole-dipole interactions and effective π-stacking in condensed states. Accordingly, ABCV-Th well exhibited photoluminescence in solid state. Intramolecular charge transfer (ICT) excited states of ABCV-Th were sensitive to the solvent polarity, and that exhibited bathochromic shift in polar solvents. Nanoparticles were prepared by using the reprecipitation method. The FE-SEM image reveals the size and physical characteristic of the nanoparticles.

Keywords:

• ABCV-Th
• intramolecular chare transfer
• nanoparticle
• red-emissive

Acknowledgments

This paper was supported by Korean Council for University Education, grant funded by Korean Government (MOEHRD) for 2007 Domestic Faculty Exchange.