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Efficient Blue Phosphorescence in Gold(I)‐Acetylide Functionalized Coinage Metal Bis(amidinate) Complexes

Feuerstein, Thomas J.; Seifert, Tim P.; Jung, André P.; Müller, Rouven; Lebedkin, Sergei; Kappes, Manfred M.; Roesky, Peter W.

Abstract:
The synthesis of linear symmetric ethynyl‐ and acetylide‐amidinates of the coinage metals is presented. Starting with the desilylation of the complexes [{Me$_{3}$SiC≡CC(NDipp)$_{2}$}$_{2}$M$_{2}$] (Dipp=2,6‐diisopropylphenyl) (M=Cu, Au) it is demonstrated that this compound class is suitable to serve as a versatile metalloligand. Deprotonation with n‐butyllithium and subsequent salt metathesis reactions yield symmetric tetranuclear gold(I) acetylide complexes of the form [{(PPh$_{3}$)AuC≡CC(NDipp)$_{2}$}$_{2}$M$_{2}$] (M=Cu, Au). The corresponding Ag complex [{(PPh$_{3}$)AuC≡CC(NDipp)$_{2}$}$_{2}$Ag$_{2}$] was obtained by a different route via metal rearrangement. All compounds show bright blue or blue‐green microsecond long phosphorescence in the solid state, hence their photophysical properties were thoroughly investigated in a temperature range of 20–295 K. Emission quantum yields of up to 41 % at room temperature were determined. Furthermore, similar emissions with quantum yields of 15 % were observed for the two most brightly luminescent complexes in thf solution.


Verlagsausgabe §
DOI: 10.5445/IR/1000126900
Veröffentlicht am 27.11.2020
Originalveröffentlichung
DOI: 10.1002/chem.202002466
Scopus
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.12.2020
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000126900
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 70
Seiten 16676-16682
Vorab online veröffentlicht am 10.06.2020
Nachgewiesen in Dimensions
Web of Science
Scopus
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