Unimolecular Exciplexes by Ugi Four-Component Reaction

Frontiers in Chemistry

Maria Ochs¹  Bernhard Mayer²  Thomas J. J. Müller² 

[1] Ernst-Berl Institut für Technische and Makromolekulare Chemie, Technische Universität Darmstadt, Darmstadt, Germany;Institut für Organische Chemie and Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany;

关键词: absorption;    bichromophores;    DFT;    emission;    energy transfer (ET) dyes;    exciplexes;   

DOI  :  10.3389/fchem.2019.00717

来源: DOAJ

【 摘 要 】

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 photo-induced intramolecular electron transfer (PIET), that is, 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 density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations.

【 授权许可】

Unknown