Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.26: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
Imidazo[1,5-a]pyridine und -quinoline as a New Class of Materials for Light Emitting Devices — •Jasmin Martha Herr1,3, Georg Albrecht2,3, Hisao Yanagi3, Derck Schlettwein2, and Richard Göttlich1 — 1Institute of Organic Chemistry, JLU Giessen, Germany — 2Institute of Applied Physics, JLU Giessen, Germany — 3Nara Institute of Science and Technology, Japan
1,3-disubstituted imidazo[1,5-a]pyridines are receiving increased interest for applications as organic semiconductor thin films, mainly regarding organic light emitting diodes (OLED). Characteristic for these molecules is a blue luminescence with a large Stokes shift and high quantum yields (QY).[1,2] The goal of this work is to explore the potential of this class of materials by introducing specific electron-withdrawing or electron-donating substituents to the chromophore system. A microwave-assisted one-pot synthesis was developed for this purpose which provides a simple and affordable approach towards this new and interesting class of materials. Thin films were prepared by physical vapor deposition (PVD) onto quartz glass. These films and solutions of the molecules were investigated by UV-Vis and fluorescence spectroscopy, as well as lifetime measurements of the excited state to then compare the measurements in solution to those in the solid phase. [1] G. Volpi, G. Magnano, I. Benesperi, D. Saccone, E. Priola, V. Gianotti, M. Milanesio, E. Conterosito, C. Barolo and G. Viscardi, Dyes Pigm. 2017, 137, 152-164. [2] F. Shibahara, R. Sugiura, E. Yamaguchi, A. Kitagawa and T. Murai, J. Org. Chem., 2009, 74, 3566-3568.