Bright luminescent lithium and magnesium carbene complexes
This journal is © The Royal Society of Chemistry..
We report on the convenient synthesis of a CNC pincer ligand composed of carbazole and two mesoionic carbenes, as well as the corresponding lithium- and magnesium complexes. Mono-deprotonation affords a rare "naked" amide anion. In contrast to the proligand and its mono-deprotonated form, tri-deprotonated s-block complexes show bright luminescence, and their photophysical properties were therefore investigated by absorption- and luminescence spectroscopy. They reveal a quantum yield of 16% in solution at ambient temperature. Detailed quantum-chemical calculations assist in rationalizing the emissive properties based on an Intra-Ligand-Charge-Transfer (ILCT) between the carbazolido- and mesoionic carbene ligands. (Earth-)alkali metals prevent the distortion of the ligand following excitation and, thus, by avoiding non-radiative deactivation support bright luminescence.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:12 |
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| Enthalten in: |
Chemical science - 12(2021), 21 vom: 15. Apr., Seite 7401-7410 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Pinter, Piermaria [VerfasserIn] |
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| Anmerkungen: |
Date Revised 11.11.2023 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1039/d1sc00846c |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM327110953 |
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| 520 | |a This journal is © The Royal Society of Chemistry. | ||
| 520 | |a We report on the convenient synthesis of a CNC pincer ligand composed of carbazole and two mesoionic carbenes, as well as the corresponding lithium- and magnesium complexes. Mono-deprotonation affords a rare "naked" amide anion. In contrast to the proligand and its mono-deprotonated form, tri-deprotonated s-block complexes show bright luminescence, and their photophysical properties were therefore investigated by absorption- and luminescence spectroscopy. They reveal a quantum yield of 16% in solution at ambient temperature. Detailed quantum-chemical calculations assist in rationalizing the emissive properties based on an Intra-Ligand-Charge-Transfer (ILCT) between the carbazolido- and mesoionic carbene ligands. (Earth-)alkali metals prevent the distortion of the ligand following excitation and, thus, by avoiding non-radiative deactivation support bright luminescence | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Schüßlbauer, Christoph M |e verfasserin |4 aut | |
| 700 | 1 | |a Watt, Fabian A |e verfasserin |4 aut | |
| 700 | 1 | |a Dickmann, Nicole |e verfasserin |4 aut | |
| 700 | 1 | |a Herbst-Irmer, Regine |e verfasserin |4 aut | |
| 700 | 1 | |a Morgenstern, Bernd |e verfasserin |4 aut | |
| 700 | 1 | |a Grünwald, Annette |e verfasserin |4 aut | |
| 700 | 1 | |a Ullrich, Tobias |e verfasserin |4 aut | |
| 700 | 1 | |a Zimmer, Michael |e verfasserin |4 aut | |
| 700 | 1 | |a Hohloch, Stephan |e verfasserin |4 aut | |
| 700 | 1 | |a Guldi, Dirk M |e verfasserin |4 aut | |
| 700 | 1 | |a Munz, Dominik |e verfasserin |4 aut | |
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