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Seven-Coordinate Luminophores: Brilliant Luminescence of Lanthanide Complexes with C-3v Geometrical Structures

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Title: Seven-Coordinate Luminophores: Brilliant Luminescence of Lanthanide Complexes with C-3v Geometrical Structures
Authors: Yanagisawa, Kei Browse this author
Nakanishi, Takayuki Browse this author →KAKEN DB
Kitagawa, Yuichi Browse this author
Seki, Tomohiro Browse this author →KAKEN DB
Akama, Tomoko Browse this author
Kobayashi, Masato Browse this author
Taketsugu, Tetsuya Browse this author →KAKEN DB
Ito, Hajime Browse this author →KAKEN DB
Fushimi, Koji Browse this author →KAKEN DB
Hasegawa, Yasuchika Browse this author →KAKEN DB
Keywords: Lanthanides
O ligands
Structure elucidation
Density functional calculations
Issue Date: Oct-2015
Publisher: Wiley-Blackwell
Journal Title: European journal of inorganic chemistry
Issue: 28
Start Page: 4769
End Page: 4774
Publisher DOI: 10.1002/ejic.201500820
Abstract: Enhanced luminescence properties of mononuclear lanthanide complexes with asymmetric seven-coordination structures are reported for the first time. The lanthanide complexes are composed of a lanthanide ion (Eu-III or Tb-III), three tetramethyl heptanedionato ligands, and one triphenylphosphine oxide ligand. The coordination geometries of the lanthanide complexes have been evaluated by using single-crystal X-ray analyses and shape-measurement calculations. The complexes are categorized to be seven-coordinate monocapped octahedral structures (point group C-3v). The seven-coordinate lanthanide complexes show high intrinsic emission quantum yields, extra-large radiative rate constants, and unexpected small nonradiative rate constants. The brilliant luminescence properties have been elucidated in terms of the asymmetric coordination geometry and small vibrational quanta related to thermal relaxation.
Rights: This is the peer reviewed version of the following article: European Journal of Inorganic Chemistry 2015(28) 4769-4774, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長谷川 靖哉

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