@article{79c46da8f4f04538b11fed5246bc1e66,
title = "Short Radiative Lifetime and Non-Triplet Sensitization in Near-Infrared-Luminescent Yb(III) Complex with Tripodal Schiff Base",
abstract = "We prepared Ln(III) (Ln=Eu, Gd, and Yb) complexes with a tripodal Schiff base, tris[2-(5-methylsalicylideneimino)ethyl]amine (H3L) and studied their photophysical properties. Upon ligand excitation, YbL showed Yb(III)-centered luminescence in the near-infrared region. While the overall quantum yield (0.60(1)%) of YbL in acetonitrile was moderate among the reported values for Yb(III) complexes, its radiative lifetime (0.33(2) ms) was significantly shorter than those reported previously. We propose that the ligand-to-metal charge-transfer (LMCT) state mediated the sensitization in YbL. The emission and excitation spectra of EuL indicated the participation of the LMCT state in the sensitization. The radiative lifetime (0.84(7) ms) for EuL in the solid state was rather short compared to those of reported Eu(III) complexes. Our results show that the Yb(III) complex with the Schiff base ligand has two features: the short radiative lifetime and the non-triplet sensitization path.",
keywords = "N,O ligands, charge transfer, luminescence, tripodal ligand, ytterbium",
author = "Atsuko Masuya-Suzuki and Satoshi Goto and Takafumi Kambe and Ryunosuke Karashimada and Yasuhiro Kubota and Nobuhiko Iki",
note = "Funding Information: This work was supported by JSPS KAKENHI (grant number: 19H02738). We thank Prof. T. Yoshioka (Graduate School of Environmental Studies, Tohoku University) and Assoc. Prof. T. Kameda (Graduate School of Environmental Studies, Tohoku University) for the PXRD measurements. We thank Prof. H. Takizawa (Graduate School of Engineering, Tohoku University) and Dr. J. Fukushima (Graduate School of Engineering, Tohoku University) for the DR spectral measurements. Funding Information: This work was supported by JSPS KAKENHI (grant number: 19H02738). We thank Prof. T. Yoshioka (Graduate School of Environmental Studies, Tohoku University) and Assoc. Prof. T. Kameda (Graduate School of Environmental Studies, Tohoku University) for the PXRD measurements. We thank Prof. H. Takizawa (Graduate School of Engineering, Tohoku University) and Dr. J. Fukushima (Graduate School of Engineering, Tohoku University) for the DR spectral measurements. Publisher Copyright: {\textcopyright} 2021 The Authors. Published by Wiley-VCH GmbH",
year = "2021",
month = jan,
doi = "10.1002/open.202000224",
language = "English",
volume = "10",
pages = "46--55",
journal = "ChemistryOpen",
issn = "2191-1363",
publisher = "John Wiley and Sons Inc.",
number = "1",
}