A Strongly Luminescent Chromium(III) Complex Acid
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Sven Otto
- Christoph Foerster
- Cui Wang
- Ute Resch-Genger
- Katja Heinze
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000442846800017&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1002/chem.201802797
- eISSN
- 1521-3765
- Externe Identifier
- Clarivate Analytics Document Solution ID: GR7DC
- PubMed Identifier: 29969160
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 48
- Zeitschrift
- CHEMISTRY-A EUROPEAN JOURNAL
- Schlüsselwörter
- chromium
- deuteration
- luminescence
- polypyridine
- tridentate ligands
- Paginierung
- 12555 - 12563
- Datum der Veröffentlichung
- 2018
- Status
- Published
- Titel
- A Strongly Luminescent Chromium(III) Complex Acid
- Sub types
- Article
- Ausgabe der Zeitschrift
- 24
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:title>Abstract</jats:title><jats:p>The synthesis, structure, reactivity, and photophysical properties of a novel acidic, luminescent chromium(III) complex [Cr(H<jats:sub>2</jats:sub>tpda)<jats:sub>2</jats:sub>]<jats:sup>3+</jats:sup> (<jats:bold>2<jats:sup>3+</jats:sup></jats:bold>) bearing the tridentate H<jats:sub>2</jats:sub>tpda (2,6‐bis(2‐pyridylamino)pyridine) ligand are presented. Excitation of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> at 442 nm results in strong, long‐lived NIR luminescence at 782 nm in water and in acetonitrile. X‐ray diffraction analysis and IR spectroscopy reveal hydrogen‐bonding interactions of the counter ions to the NH groups of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> in the solid state. Deprotonation of the NH groups of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> by using a non‐nucleophilic Schwesinger base in CH<jats:sub>3</jats:sub>CN switches off the luminescence. Re‐protonation by using HClO<jats:sub>4</jats:sub> restores the emission. In water, the p<jats:italic>K</jats:italic><jats:sub>a</jats:sub> value of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> amounts to 8.8, yet deprotonation is not reversible in the presence of hydroxide ions. Dioxygen quenches the emission of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold>, but to a weaker extent than expected. This is possibly due to the strong ion‐pairing properties of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> even in solution, reducing the energy transfer efficiency to O<jats:sub>2</jats:sub>. Deuteration of the NH groups of <jats:bold>2<jats:sup>3+</jats:sup></jats:bold> approximately doubles the quantum yield and lifetime in water, demonstrating the importance of multiphoton relaxation in these NIR emitters.</jats:p>
- Autoren
- Sven Otto
- Christoph Förster
- Cui Wang
- Ute Resch‐Genger
- Katja Heinze
- DOI
- 10.1002/chem.201802797
- eISSN
- 1521-3765
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 48
- Zeitschrift
- Chemistry – A European Journal
- Sprache
- en
- Online publication date
- 2018
- Paginierung
- 12555 - 12563
- Datum der Veröffentlichung
- 2018
- Status
- Published
- Herausgeber
- Wiley
- Herausgeber URL
- http://dx.doi.org/10.1002/chem.201802797
- Datum der Datenerfassung
- 2023
- Titel
- A Strongly Luminescent Chromium(III) Complex Acid
- Ausgabe der Zeitschrift
- 24
Datenquelle: Crossref
- Abstract
- The synthesis, structure, reactivity, and photophysical properties of a novel acidic, luminescent chromium(III) complex [Cr(H<sub>2</sub> tpda)<sub>2</sub> ]<sup>3+</sup> (2<sup>3+</sup> ) bearing the tridentate H<sub>2</sub> tpda (2,6-bis(2-pyridylamino)pyridine) ligand are presented. Excitation of 2<sup>3+</sup> at 442 nm results in strong, long-lived NIR luminescence at 782 nm in water and in acetonitrile. X-ray diffraction analysis and IR spectroscopy reveal hydrogen-bonding interactions of the counter ions to the NH groups of 2<sup>3+</sup> in the solid state. Deprotonation of the NH groups of 2<sup>3+</sup> by using a non-nucleophilic Schwesinger base in CH<sub>3</sub> CN switches off the luminescence. Re-protonation by using HClO<sub>4</sub> restores the emission. In water, the pK<sub>a</sub> value of 2<sup>3+</sup> amounts to 8.8, yet deprotonation is not reversible in the presence of hydroxide ions. Dioxygen quenches the emission of 2<sup>3+</sup> , but to a weaker extent than expected. This is possibly due to the strong ion-pairing properties of 2<sup>3+</sup> even in solution, reducing the energy transfer efficiency to O<sub>2</sub> . Deuteration of the NH groups of 2<sup>3+</sup> approximately doubles the quantum yield and lifetime in water, demonstrating the importance of multiphoton relaxation in these NIR emitters.
- Addresses
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.
- Autoren
- Sven Otto
- Christoph Förster
- Cui Wang
- Ute Resch-Genger
- Katja Heinze
- DOI
- 10.1002/chem.201802797
- eISSN
- 1521-3765
- Externe Identifier
- PubMed Identifier: 29969160
- Funding acknowledgements
- Deutsche Forschungsgemeinschaft: RE 1203/23-1
- Johannes Gutenberg-Universität Mainz: internal university research funds
- Deutsche Forschungsgemeinschaft: GSC 266
- Deutsche Forschungsgemeinschaft: HE 2778/10-1
- Open access
- false
- ISSN
- 0947-6539
- Ausgabe der Veröffentlichung
- 48
- Zeitschrift
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Sprache
- eng
- Medium
- Print-Electronic
- Online publication date
- 2018
- Paginierung
- 12555 - 12563
- Datum der Veröffentlichung
- 2018
- Status
- Published
- Datum der Datenerfassung
- 2018
- Titel
- A Strongly Luminescent Chromium(III) Complex Acid.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 24
Datenquelle: Europe PubMed Central
- Abstract
- The synthesis, structure, reactivity, and photophysical properties of a novel acidic, luminescent chromium(III) complex [Cr(H2 tpda)2 ]3+ (23+ ) bearing the tridentate H2 tpda (2,6-bis(2-pyridylamino)pyridine) ligand are presented. Excitation of 23+ at 442 nm results in strong, long-lived NIR luminescence at 782 nm in water and in acetonitrile. X-ray diffraction analysis and IR spectroscopy reveal hydrogen-bonding interactions of the counter ions to the NH groups of 23+ in the solid state. Deprotonation of the NH groups of 23+ by using a non-nucleophilic Schwesinger base in CH3 CN switches off the luminescence. Re-protonation by using HClO4 restores the emission. In water, the pKa value of 23+ amounts to 8.8, yet deprotonation is not reversible in the presence of hydroxide ions. Dioxygen quenches the emission of 23+ , but to a weaker extent than expected. This is possibly due to the strong ion-pairing properties of 23+ even in solution, reducing the energy transfer efficiency to O2 . Deuteration of the NH groups of 23+ approximately doubles the quantum yield and lifetime in water, demonstrating the importance of multiphoton relaxation in these NIR emitters.
- Autoren
- Sven Otto
- Christoph Förster
- Cui Wang
- Ute Resch-Genger
- Katja Heinze
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/29969160
- DOI
- 10.1002/chem.201802797
- eISSN
- 1521-3765
- Ausgabe der Veröffentlichung
- 48
- Zeitschrift
- Chemistry
- Schlüsselwörter
- chromium
- deuteration
- luminescence
- polypyridine
- tridentate ligands
- Sprache
- eng
- Country
- Germany
- Paginierung
- 12555 - 12563
- Datum der Veröffentlichung
- 2018
- Status
- Published
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2018
- Titel
- A Strongly Luminescent Chromium(III) Complex Acid.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 24
Datenquelle: PubMed
- Beziehungen:
-