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Medientyp:
E-Artikel
Titel:
Synthesis and Properties of Acridone Oligomers
Beteiligte:
Liu, Renfei;
Zhu, Guanxing;
Ji, Yongxin;
Zhang, Gang
Erschienen:
Wiley, 2019
Erschienen in:European Journal of Organic Chemistry
Sprache:
Englisch
DOI:
10.1002/ejoc.201900511
ISSN:
1434-193X;
1099-0690
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Length‐defined 2,7‐acridone oligomers were synthesized via a sequence of bromination, borylation and Suzuki–Miyaura cross‐coupling reaction. Both the single crystal structure analysis and the theoretical calculations demonstrate that the <jats:italic>anti</jats:italic> conformation is favored in the oligomer. The relationship of the properties and the number of acridone units in the oligomer was investigated. The UV/Vis absorption and fluorescence spectroscopy reveal that the absorption and emission of oligomers are red‐shifted and energy gaps narrow with the increase of acridone moieties, as well as a decline in the radiative decay rate. Cyclic voltammetry measurements and theoretical calculations elucidate that the quantity of acridone in the oligomer plays a greater effect on the HOMO energy levels than on the LUMO ones.</jats:p>