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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

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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000117533
Veröffentlicht am 04.03.2020
DOI: 10.1002/chem.201904754
Zitationen: 1
Web of Science
Zitationen: 1
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 Wiley
Band 26
Heft 14
Seiten 3119-3128
Vorab online veröffentlicht am 03.12.2019
Nachgewiesen in Scopus
Web of Science
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