Issue 1, 2023

Thermally stable and strongly emitted CPL in Eu(d-facam)3 hybrid solids with an alkylammonium salt

Abstract

A novel europium-based hybrid material, Eu(D-facam)3-TMAOAc (tetramethylammonium acetate), with ultra-high luminescence, excellent circular polarization and remarkable thermostability was prepared. Its photophysical performance was studied based on the luminescence properties and energy transfer process. Compared to Eu(D-facam)3, Eu(D-facam)3-TMAOAc exhibited much brighter luminescence and stronger circular polarization. Additionally, Eu(D-facam)3-TMAOAc well retained its structure and luminescence properties even after heat treatment at 200 °C for 24 hours, whereas Eu(D-facam)3 rapidly decomposed. Eu(D-facam)3-TMAOAc was characterized by TG analysis, elemental analysis, ESI-mass spectrometry, PXRD, and FT-IR spectroscopy. It was found that TMAOAc acted as a bidentate bridge linker with Eu(D-facam)3 at a 1 : 1 ratio. This coordination structure contributed to the excellent photophysical properties and thermal stability of Eu(D-facam)3-TMAOAc. Furthermore, Eu(D-facam)3-TMAOAc showed a high solubility in common organic solvents, and it could maintain its outstanding luminescence properties in solid as well as solution states.

Graphical abstract: Thermally stable and strongly emitted CPL in Eu(d-facam)3 hybrid solids with an alkylammonium salt

Supplementary files

Article information

Article type
Paper
Submitted
03 Huk 2022
Accepted
27 Huk 2022
First published
29 Huk 2022

J. Mater. Chem. C, 2023,11, 118-126

Author version available

Thermally stable and strongly emitted CPL in Eu(D-facam)3 hybrid solids with an alkylammonium salt

Z. Li, K. Nakamura and N. Kobayashi, J. Mater. Chem. C, 2023, 11, 118 DOI: 10.1039/D2TC04670A

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