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Improved Photostability of a Cu-I Complex by Macrocyclization of the Phenanthroline Ligands

Brandl, Thomas; Kerzig, Christoph; Le Pleux, Loïc; Prescimone, Alessandro; Wenger, Oliver S.; Mayor, Marcel 1
1 Karlsruher Institut für Technologie (KIT)


The development of molecular materials for conversion of solar energy into electricity and fuels is one of the most active research areas, in which the light absorber plays a key role. While copper(I)-bis(diimine) complexes [Cu$^{l}$ (L) $_{2}$] $^{+}$ are considered as potent substitutes for [Ru$^{ll}$ (bpy) $_{3}$] $^{2+}$, they exhibit limited structural integrity as ligand loss by substitution can occur. In this article, we present a new concept to stabilize copper bis(phenanthroline) complexes by macrocyclization of the ligands which are preorganized around the Cu$^{l}$ ion. Using oxidative Hay acetylene homocoupling conditions, several Cu$^{l}$ complexes with varying bridge length were prepared and analyzed. Absorption and emission properties are assessed; rewardingly, the envisioned approach was successful since the flexible 1,4-butadiyl-bridged complex does show enhanced MLCT absorption and emission, as well as improved photostability upon irradiation with a blue LED compared to a reference complex.

Verlagsausgabe §
DOI: 10.5445/IR/1000117533
Veröffentlicht am 04.03.2020
DOI: 10.1002/chem.201904754
Zitationen: 6
Web of Science
Zitationen: 6
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 09.03.2020
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000117533
HGF-Programm 43.21.04 (POF III, LK 01) Molecular Engineering
Erschienen in Chemistry - a European journal
Verlag John Wiley and Sons
Band 26
Heft 14
Seiten 3119-3128
Vorab online veröffentlicht am 03.12.2019
Nachgewiesen in Web of Science
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