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Front. Chem. | doi: 10.3389/fchem.2019.00717

Unimolecular Exciplexes by Ugi Four-component Reaction

 Thomas J. Müller1*,  Bernhard Mayer1 and Maria Ochs1, 2
  • 1Institute of Organic and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Germany
  • 2Ernst-Berl-Institute for Technical and Macromolecular Chemistry, Darmstadt University of Technology, Germany

Exciplex or excited complex emission is an excited state process, arising from considerable charge transfer of an excited energy donor to an acceptor, which can be identified by the occurrence of a redshifted emission band that is absent in the individual constituents. Particularly interesting are exciplexes that are formed by intramolecular excited state interaction, which are inherently concentration independent. Based upon our previous experience in the Ugi-4CR syntheses of donor-acceptor conjugates capable of photoinduced intramolecular electron transfer (PIET), i.e. generation of light induced charge separation, we now disclose the diversity oriented approach on unimolecular exciplex emitters and their reference systems by Ugi-4CR. The photophysics is studied by absorption and emission spectroscopy and accompanied by DFT and TDDFT calculations.

Keywords: Absorption, bichromophores, DFT, emission, Energy transfer (ET) dyes, exciplexes, Isonitrile, multicomponent reaction (MCR)

Received: 12 Jun 2019; Accepted: 10 Oct 2019.

Copyright: © 2019 Müller, Mayer and Ochs. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Thomas J. Müller, Institute of Organic and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Düsseldorf, Germany, ThomasJJ.Mueller@hhu.de