Alkali Blues: Blue-Emissive Alkali Metal Pyrrolates
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Oliver Back
- Christoph Foerster
- Thomas Basche
- Katja Heinze
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000471036800013&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1002/chem.201806103
- eISSN
- 1521-3765
- Externe Identifier
- Clarivate Analytics Document Solution ID: IC5VL
- PubMed Identifier: 30786063
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 26
- Zeitschrift
- CHEMISTRY-A EUROPEAN JOURNAL
- Schlüsselwörter
- alkali metals
- blue emitters
- fluorescence
- N ligands
- rigidification
- Paginierung
- 6542 - 6552
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Titel
- Alkali Blues: Blue-Emissive Alkali Metal Pyrrolates
- Sub types
- Article
- Ausgabe der Zeitschrift
- 25
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:title>Abstract</jats:title><jats:p>2‐Iminopyrroles [H<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L, 4‐<jats:italic>tert</jats:italic>‐butyl phenyl(pyrrol‐2‐ylmethylene)amine] are non‐fluorescent π systems. However, they display blue fluorescence after deprotonation with alkali metal bases in the solid state and in solution at room temperature. In the solid state, the alkali metal 2‐imino pyrrolates, M(<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L), aggregate to dimers, [M(<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L)(NCR)]<jats:sub>2</jats:sub> (M=Li, R=CH<jats:sub>3</jats:sub>, CH(CH<jats:sub>3</jats:sub>)CNH<jats:sub>2</jats:sub>), or polymers, [M(<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L)]<jats:sub><jats:italic>n</jats:italic></jats:sub> (M=Na, K). In solution (solv=CH<jats:sub>3</jats:sub>CN, DMSO, THF, and toluene), solvated, uncharged monomeric species M(<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L)(solv)<jats:sub><jats:italic>m</jats:italic></jats:sub> with <jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>′‐chelated alkali metal ions are present. Due to the electron‐rich pyrrolate and the electron‐poor arylimino moiety, the M(<jats:sup><jats:italic>t</jats:italic>Bu</jats:sup>L) chromophore possesses a low‐energy intraligand charge‐transfer (ILCT) excited state. The chelated alkali cations rigidify the chromophore, restricting intramolecular motions (RIM) by the chelation‐enhanced fluorescence (CHEF) effect in solution and, consequently, switch‐on a blue fluorescence emission.</jats:p>
- Autoren
- Oliver Back
- Christoph Förster
- Thomas Basché
- Katja Heinze
- DOI
- 10.1002/chem.201806103
- eISSN
- 1521-3765
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 26
- Zeitschrift
- Chemistry – A European Journal
- Sprache
- en
- Online publication date
- 2019
- Paginierung
- 6542 - 6552
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Herausgeber
- Wiley
- Herausgeber URL
- http://dx.doi.org/10.1002/chem.201806103
- Datum der Datenerfassung
- 2023
- Titel
- Alkali Blues: Blue‐Emissive Alkali Metal Pyrrolates
- Ausgabe der Zeitschrift
- 25
Datenquelle: Crossref
- Abstract
- 2-Iminopyrroles [H<sup>tBu</sup> L, 4-tert-butyl phenyl(pyrrol-2-ylmethylene)amine] are non-fluorescent π systems. However, they display blue fluorescence after deprotonation with alkali metal bases in the solid state and in solution at room temperature. In the solid state, the alkali metal 2-imino pyrrolates, M(<sup>tBu</sup> L), aggregate to dimers, [M(<sup>tBu</sup> L)(NCR)]<sub>2</sub> (M=Li, R=CH<sub>3</sub> , CH(CH<sub>3</sub> )CNH<sub>2</sub> ), or polymers, [M(<sup>tBu</sup> L)]<sub>n</sub> (M=Na, K). In solution (solv=CH<sub>3</sub> CN, DMSO, THF, and toluene), solvated, uncharged monomeric species M(<sup>tBu</sup> L)(solv)<sub>m</sub> with N,N'-chelated alkali metal ions are present. Due to the electron-rich pyrrolate and the electron-poor arylimino moiety, the M(<sup>tBu</sup> L) chromophore possesses a low-energy intraligand charge-transfer (ILCT) excited state. The chelated alkali cations rigidify the chromophore, restricting intramolecular motions (RIM) by the chelation-enhanced fluorescence (CHEF) effect in solution and, consequently, switch-on a blue fluorescence emission.
- Addresses
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.
- Autoren
- Oliver Back
- Christoph Förster
- Thomas Basché
- Katja Heinze
- DOI
- 10.1002/chem.201806103
- eISSN
- 1521-3765
- Externe Identifier
- PubMed Identifier: 30786063
- Funding acknowledgements
- Rheinland-Pfalz: LESSING
- Rheinland-Pfalz: CINEMA
- Stiftung Rheinland-Pfalz für Innovation: CINEMA
- Stiftung Rheinland-Pfalz für Innovation: LESSING
- Open access
- false
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 26
- Zeitschrift
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Sprache
- eng
- Medium
- Print-Electronic
- Online publication date
- 2019
- Paginierung
- 6542 - 6552
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Datum der Datenerfassung
- 2019
- Titel
- Alkali Blues: Blue-Emissive Alkali Metal Pyrrolates.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 25
Datenquelle: Europe PubMed Central
- Abstract
- 2-Iminopyrroles [HtBu L, 4-tert-butyl phenyl(pyrrol-2-ylmethylene)amine] are non-fluorescent π systems. However, they display blue fluorescence after deprotonation with alkali metal bases in the solid state and in solution at room temperature. In the solid state, the alkali metal 2-imino pyrrolates, M(tBu L), aggregate to dimers, [M(tBu L)(NCR)]2 (M=Li, R=CH3 , CH(CH3 )CNH2 ), or polymers, [M(tBu L)]n (M=Na, K). In solution (solv=CH3 CN, DMSO, THF, and toluene), solvated, uncharged monomeric species M(tBu L)(solv)m with N,N'-chelated alkali metal ions are present. Due to the electron-rich pyrrolate and the electron-poor arylimino moiety, the M(tBu L) chromophore possesses a low-energy intraligand charge-transfer (ILCT) excited state. The chelated alkali cations rigidify the chromophore, restricting intramolecular motions (RIM) by the chelation-enhanced fluorescence (CHEF) effect in solution and, consequently, switch-on a blue fluorescence emission.
- Autoren
- Oliver Back
- Christoph Förster
- Thomas Basché
- Katja Heinze
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/30786063
- DOI
- 10.1002/chem.201806103
- eISSN
- 1521-3765
- Funding acknowledgements
- Rheinland-Pfalz: CINEMA
- Rheinland-Pfalz: LESSING
- Ausgabe der Veröffentlichung
- 26
- Zeitschrift
- Chemistry
- Schlüsselwörter
- N ligands
- alkali metals
- blue emitters
- fluorescence
- rigidification
- Sprache
- eng
- Country
- Germany
- Paginierung
- 6542 - 6552
- Datum der Veröffentlichung
- 2019
- Status
- Published
- Titel
- Alkali Blues: Blue-Emissive Alkali Metal Pyrrolates.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 25
Datenquelle: PubMed
- Beziehungen:
-