Journalartikel

Autorenliste: Youssef, H; Sedykh, AE; Becker, J; Schäfer, T; Taydakov, IV; Li, HR; Müller-Buschbaum, K

Jahr der Veröffentlichung: 2021

Seiten: 16634-16641

Zeitschrift: Chemistry - A European Journal

Bandnummer: 27

Heftnummer: 67

ISSN: 0947-6539

eISSN: 1521-3765

Open Access Status: Green

DOI Link: https://doi.org/10.1002/chem.202103068

Verlag: Wiley

Abstract: 
Homoleptic, 3D coordination polymers of the formula (33)(infinity)[Ln(3-PyPz)(3)] and (3)(infinity)[Ln(4-PyPz)(3)], (3-PyPz)(-)=3-(3-pyridyl)pyrazolate anion, (4-PyPz)(-)=3-(4-pyridyl)pyrazolate anion, both C8H6N3-, Ln=Sm, Eu, Gd, Tb, Dy, were obtained as highly luminescent frameworks by reaction of the lanthanide metals (Ln) with the aromatic heterocyclic amine ligands 3-PyPzH and 4-PyPzH. The compounds form two isotypic series of 3D coordination polymers and exhibit fair thermal stability up to 360 degrees C. The luminescence properties of all ten compounds were determined in the solid state, with an antenna effect through ligand-metal energy transfer leading to high efficiency of the luminescence displayed by good quantum yields of up to 74 %. The emission is mainly based on ion-specific lanthanide-dependent intra 4 f-4 f transitions for Tb3+: green, Dy3+: yellow, Sm3+: orange-red, Eu3+: red. For the Gd3+-containing compounds, the yellow emission of ligand triplet-based phosphorescence is observed at room temperature and 77 K. Co doping of the Gd-containing frameworks with Eu3+ and Tb3+ allow further shifting of the chromaticity towards white light emission.

Harvard-Zitierstil: Youssef, H., Sedykh, A., Becker, J., Schäfer, T., Taydakov, I., Li, H., et al. (2021) Variable Luminescence and Chromaticity of Homoleptic Frameworks of the Lanthanides together with Pyridylpyrazolates, Chemistry - A European Journal, 27(67), pp. 16634-16641. https://doi.org/10.1002/chem.202103068

APA-Zitierstil: Youssef, H., Sedykh, A., Becker, J., Schäfer, T., Taydakov, I., Li, H., & Müller-Buschbaum, K. (2021). Variable Luminescence and Chromaticity of Homoleptic Frameworks of the Lanthanides together with Pyridylpyrazolates. Chemistry - A European Journal. 27(67), 16634-16641. https://doi.org/10.1002/chem.202103068