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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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126900
Veröffentlicht am 27.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 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
Seiten chem.202002466
Vorab online veröffentlicht am 10.06.2020
Nachgewiesen in Web of Science
Scopus
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