Complexes of Ce(III) and Bis(pyrazolyl)borate Ligands: Synthesis, Structures, and Luminescence Properties

Ruoyao Guo; Liding Wang; Zelun Cai; Zifeng Zhao; Zuqiang Bian; Zhiwei Liu

doi:10.1021/acs.inorgchem.2c02353

Complexes of Ce(III) and Bis(pyrazolyl)borate Ligands: Synthesis, Structures, and Luminescence Properties

Inorg Chem. 2022 Sep 5;61(35):14164-14172. doi: 10.1021/acs.inorgchem.2c02353. Epub 2022 Aug 22.

Authors

Ruoyao Guo¹, Liding Wang¹, Zelun Cai¹, Zifeng Zhao¹, Zuqiang Bian¹, Zhiwei Liu¹

Affiliation

¹ Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

PMID: 35994595
DOI: 10.1021/acs.inorgchem.2c02353

Abstract

Luminescent cerium(III) complexes based on the d-f transition have characteristics of broad emission spectra, tunable emission colors, and short excited state lifetimes, showing potential applications in display, lighting, and other fields. Thus it is important to construct luminescent Ce(III) complexes with high photoluminescence efficiency and good stability. In this work, five Ce(III) complexes with dihydrobis(pyrazolyl)borate or diphenylbis(pyrazolyl)borate ligands, where pyrazolyl stands for pyrazolyl, 3-methylpyrazolyl, or 3,5-dimethylpyrazolyl, were designed and synthesized, showing emission colors from deep blue to yellow with a maximum wavelength in the range of 390-560 nm, short excited state lifetimes of 30-80 ns, and photoluminescence quantum yields exceeding 75% in solid powder. By comparing these complexes, it is found that higher photoluminescence efficiency and better thermal/air stability could be achieved in the complexes with dihydrobis(pyrazolyl)borate ligands.