Simple Synthetic Routes to Carbene-M-Amido (M=Cu,Ag, Au) Complexes for Luminescence and Photocatalysis Applications |
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| Authors: | Nikolaos V. Tzouras Ekaterina A. Martynova Xinyuan Ma Dr. Thomas Scattolin Dr. Benjamin Hupp Hendrik Busen Marina Saab Ziyun Zhang Dr. Laura Falivene Gianmarco Pisanò Prof. Dr. Kristof Van Hecke Prof. Dr. Luigi Cavallo Prof. Dr. Catherine S. J. Cazin Prof. Dr. Andreas Steffen Prof. Dr. Steven P. Nolan |
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| Affiliation: | 1. Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281,S-3, 9000 Ghent, Belgium;2. Faculty of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Str. 6, 44227 Dortmund, Germany;3. KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900 Saudi Arabia |
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| Abstract: | The development of novel and operationally simple synthetic routes to carbene-metal-amido (CMA) complexes of copper, silver and gold relevant for photonic applications are reported. A mild base and sustainable solvents allow all reactions to be conducted in air and at room temperature, leading to high yields of the targeted compounds even on multigram scales. The effect of various mild bases on the N−H metallation was studied in silico and experimentally, while a mechanochemical, solvent-free synthetic approach was also developed. Our photophysical studies on [M(NHC)(Cbz)] (Cbz=carbazolyl) indicate that the occurrence of fluorescent or phosphorescent states is determined primarily by the metal, providing control over the excited state properties. Consequently, we demonstrate the potential of the new CMAs beyond luminescence applications by employing a selected CMA as a photocatalyst. The exemplified synthetic ease is expected to accelerate the applications of CMAs in photocatalysis and materials chemistry. |
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| Keywords: | carbene-metal-amides coinage metal-N-heterocyclic carbene complexes mechanochemistry photocatalysis synthetic methods |
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