Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- Elena A Mikhalyova
- Matthias Zeller
- Jerry P Jasinski
- Raymond J Butcher
- Luca M Carrella
- Alexander E Sedykh
- Konstantin S Gavrilenko
- Sergey S Smola
- Michael Frasso
- Sebastian Calderon Cazorla
- Kuluni Perera
- Anni Shi
- Habib G Ranjbar
- Casey Smith
- Alexandru Deac
- Youlin Liu
- Sean M McGee
- Vladimir P Dotsenko
- Michael U Kumke
- Klaus Mueller-Buschbaum
- Eva Rentschler
- Anthony W Addison
- Vitaly V Pavlishchuk
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000542720000013&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1039/d0dt00600a
- eISSN
- 1477-9234
- Externe Identifier
- Clarivate Analytics Document Solution ID: MB6OA
- PubMed Identifier: 32406435
- ISSN
- 1477-9226
- Ausgabe der Veröffentlichung
- 23
- Zeitschrift
- DALTON TRANSACTIONS
- Paginierung
- 7774 - 7789
- Datum der Veröffentlichung
- 2020
- Status
- Published
- Titel
- Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands
- Sub types
- Article
- Ausgabe der Zeitschrift
- 49
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Abstract
- <p>Mono-, di- & trinuclear ternary complexes of Dy<sup>3+</sup>& Tb<sup>3+</sup>with pyrazole & oligo-diketonates are both luminescent and single molecule magnets. Quantum yields &<italic>U</italic><sub>eff</sub>values decrease with higher nuclearity & reduced intramolecular Ln–Ln distance.</p>
- Autoren
- Elena A Mikhalyova
- Matthias Zeller
- Jerry P Jasinski
- Raymond J Butcher
- Luca M Carrella
- Alexander E Sedykh
- Konstantin S Gavrilenko
- Sergey S Smola
- Michael Frasso
- Sebastian Calderon Cazorla
- Kuluni Perera
- Anni Shi
- Habib G Ranjbar
- Casey Smith
- Alexandru Deac
- Youlin Liu
- Sean M McGee
- Vladimir P Dotsenko
- Michael U Kumke
- Klaus Müller-Buschbaum
- Eva Rentschler
- Anthony W Addison
- Vitaly V Pavlishchuk
- DOI
- 10.1039/d0dt00600a
- eISSN
- 1477-9234
- ISSN
- 1477-9226
- Ausgabe der Veröffentlichung
- 23
- Zeitschrift
- Dalton Transactions
- Sprache
- en
- Online publication date
- 2020
- Paginierung
- 7774 - 7789
- Status
- Published online
- Herausgeber
- Royal Society of Chemistry (RSC)
- Herausgeber URL
- http://dx.doi.org/10.1039/d0dt00600a
- Datum der Datenerfassung
- 2024
- Titel
- Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands
- Ausgabe der Zeitschrift
- 49
Data source: Crossref
- Abstract
- A series of tris(pyrazolyl)borate mono-, di- and trinuclear complexes, [Tp<sub>2</sub>Ln]<sub>n</sub>X (Ln = Eu, Tb, Gd, Dy, X<sup>n-</sup> = various mono-, bis- and tris(β-diketonates) has been prepared. The Tb<sup>3+</sup> and Dy<sup>3+</sup> complexes are luminescent single molecular magnets (SMM) and exhibit luminescence quantum efficiencies up to 73% for the Tb<sup>3+</sup> and 4.4% for the Dy<sup>3+</sup> compounds. Similar Eu<sup>3+</sup> complexes display bright emission only at lower temperatures. The Dy<sup>3+</sup> and Tb<sup>3+</sup> complexes possess SMM behavior in a non-zero dc field at low temperatures, while the polynuclear Dy<sup>3+</sup> complexes also show slow magnetic relaxation even in zero dc field up to 8 K. U<sub>eff</sub>-values determined from dynamic magnetic measurements were up to 31 and 6 cm<sup>-1</sup> for the Dy<sup>3+</sup> and Tb<sup>3+</sup> complexes, respectively. It was found that within a series of Dy<sup>3+</sup> and Tb<sup>3+</sup> compounds, U<sub>eff</sub> and luminescence quantum yields decreased with increasing nuclearity of the compounds and a shortening of the intramolecular Ln-Ln distance. Δ<sub>Orbach</sub>-values estimated from low-temperature luminescence spectra were significantly higher than those obtained from ac magnetic data, which may be due to involvement of additional processes in the relaxation mechanism (quantum tunneling, Raman, direct) reducing the energy barrier. Some of the Tb<sup>3+</sup>-compounds also display metal-centred electroluminescence, giving them potential as emitting layers in LEDs.
- Addresses
- L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of the Ukraine, Prospekt Nauki 31, Kiev, 03028, Ukraine. shchuk@inphyschem-nas.kiev.ua elenaamikhalyova@gmail.com.
- Autoren
- Elena A Mikhalyova
- Matthias Zeller
- Jerry P Jasinski
- Raymond J Butcher
- Luca M Carrella
- Alexander E Sedykh
- Konstantin S Gavrilenko
- Sergey S Smola
- Michael Frasso
- Sebastian Calderon Cazorla
- Kuluni Perera
- Anni Shi
- Habib G Ranjbar
- Casey Smith
- Alexandru Deac
- Youlin Liu
- Sean M McGee
- Vladimir P Dotsenko
- Michael U Kumke
- Klaus Müller-Buschbaum
- Eva Rentschler
- Anthony W Addison
- Vitaly V Pavlishchuk
- DOI
- 10.1039/d0dt00600a
- eISSN
- 1477-9234
- Externe Identifier
- PubMed Identifier: 32406435
- Funding acknowledgements
- Studienstiftung des Deutschen Volkes:
- Volkswagen Foundation: 90343
- Open access
- false
- ISSN
- 1477-9226
- Ausgabe der Veröffentlichung
- 23
- Zeitschrift
- Dalton transactions (Cambridge, England : 2003)
- Sprache
- eng
- Medium
- Print-Electronic
- Online publication date
- 2020
- Paginierung
- 7774 - 7789
- Datum der Veröffentlichung
- 2020
- Status
- Published
- Datum der Datenerfassung
- 2020
- Titel
- Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 49
Data source: Europe PubMed Central
- Abstract
- A series of tris(pyrazolyl)borate mono-, di- and trinuclear complexes, [Tp2Ln]nX (Ln = Eu, Tb, Gd, Dy, Xn- = various mono-, bis- and tris(β-diketonates) has been prepared. The Tb3+ and Dy3+ complexes are luminescent single molecular magnets (SMM) and exhibit luminescence quantum efficiencies up to 73% for the Tb3+ and 4.4% for the Dy3+ compounds. Similar Eu3+ complexes display bright emission only at lower temperatures. The Dy3+ and Tb3+ complexes possess SMM behavior in a non-zero dc field at low temperatures, while the polynuclear Dy3+ complexes also show slow magnetic relaxation even in zero dc field up to 8 K. Ueff-values determined from dynamic magnetic measurements were up to 31 and 6 cm-1 for the Dy3+ and Tb3+ complexes, respectively. It was found that within a series of Dy3+ and Tb3+ compounds, Ueff and luminescence quantum yields decreased with increasing nuclearity of the compounds and a shortening of the intramolecular Ln-Ln distance. ΔOrbach-values estimated from low-temperature luminescence spectra were significantly higher than those obtained from ac magnetic data, which may be due to involvement of additional processes in the relaxation mechanism (quantum tunneling, Raman, direct) reducing the energy barrier. Some of the Tb3+-compounds also display metal-centred electroluminescence, giving them potential as emitting layers in LEDs.
- Autoren
- Elena A Mikhalyova
- Matthias Zeller
- Jerry P Jasinski
- Raymond J Butcher
- Luca M Carrella
- Alexander E Sedykh
- Konstantin S Gavrilenko
- Sergey S Smola
- Michael Frasso
- Sebastian Calderon Cazorla
- Kuluni Perera
- Anni Shi
- Habib G Ranjbar
- Casey Smith
- Alexandru Deac
- Youlin Liu
- Sean M McGee
- Vladimir P Dotsenko
- Michael U Kumke
- Klaus Müller-Buschbaum
- Eva Rentschler
- Anthony W Addison
- Vitaly V Pavlishchuk
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/32406435
- DOI
- 10.1039/d0dt00600a
- eISSN
- 1477-9234
- Ausgabe der Veröffentlichung
- 23
- Zeitschrift
- Dalton Trans
- Sprache
- eng
- Country
- England
- Paginierung
- 7774 - 7789
- Datum der Veröffentlichung
- 2020
- Status
- Published
- Titel
- Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 49
Data source: PubMed
- Beziehungen:
- Property of