Emission Properties of Eu(III) Complexes Containing Arsine and Phosphine Ligands with Annulated Structures

Toshiki Fujii; Yuichi Kitagawa; Yasuchika Hasegawa; Hiroaki Imoto; Kensuke Naka

doi:10.1021/acs.inorgchem.2c02757

Emission Properties of Eu(III) Complexes Containing Arsine and Phosphine Ligands with Annulated Structures

Inorg Chem. 2022 Nov 7;61(44):17662-17672. doi: 10.1021/acs.inorgchem.2c02757. Epub 2022 Oct 27.

Authors

Toshiki Fujii¹, Yuichi Kitagawa², Yasuchika Hasegawa², Hiroaki Imoto¹, Kensuke Naka^{1

3}

Affiliations

¹ Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan.
² Faculty of Engineering and Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido060-8628, Japan.
³ Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto606-8585, Japan.

PMID: 36300325
DOI: 10.1021/acs.inorgchem.2c02757

Abstract

In this study, we synthesized Eu³⁺ complexes containing arsine and phosphine oxides with annulated structures as the antenna ligands. The type of bridging in the annulated structures controlled the energy level of the triplet excited state and the intersystem crossing efficiency, leading to different emission properties. Eu³⁺ complexes bearing the arsine oxides showed a higher intensity ratio of electric/magnetic dipole transitions and energy-transfer efficiency than the complexes with the corresponding phosphine oxides.