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Enhanced Luminescence of Asymmetrical Seven-Coordinate Eu-III Complexes Including LMCT Perturbation

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タイトル: Enhanced Luminescence of Asymmetrical Seven-Coordinate Eu-III Complexes Including LMCT Perturbation
著者: Yanagisawa, Kei 著作を一覧する
Kitagawa, Yuichi 著作を一覧する
Nakanishi, Takayuki 著作を一覧する
Akama, Tomoko 著作を一覧する
Kobayashi, Masato 著作を一覧する
Seki, Tomohiro 著作を一覧する
Fushimi, Koji 著作を一覧する
Ito, Hajime 著作を一覧する
Taketsugu, Tetsuya 著作を一覧する
Hasegawa, Yasuchika 著作を一覧する
キーワード: Lanthanides
Luminescence
Charge transfer
Structure elucidation
Density functional calculations
発行日: 2017年 9月 1日
出版者: Wiley-Blackwell
誌名: European journal of inorganic chemistry
号: 32
開始ページ: 3843
終了ページ: 3848
出版社 DOI: 10.1002/ejic.201700815
抄録: Luminescent mononuclear seven-coordinate Eu-III complexes, with monocapped-octahedral (point group: C-3v), monocapped-trigonal-prismatic (C-2v), and pentagonal-bipyramidal (D-5h) coordination structures, are reported. The complexes each consist of a Eu-III ion, three tetramethylheptanedionates, and a phosphine oxide derivative. Controlling steric hindrance by means of introducing methyl groups into the phosphine oxide ligands resulted in the formation of three types of coordination polyhedral structures. The coordination geometrical structures of the Eu-III complexes were evaluated by single-crystal X-ray diffraction analysis and shape-factor calculations. The radiative rate constant of the Eu-III complex with a monocapped-octahedral structure was larger than those with monocapped-trigonal-prismatic and pentagonal-bipyramidal structures. Characteristic photophysical properties of the seven-coordinate Eu-III complexes are discussed with TD-DFT calculations and Arrhenius analysis of the ligand-to-metal charge transfer.
Rights: This is the peer reviewed version of the following article: European journal of inorganic chemistry 32 3843-3848 2017-09-01 , which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/ejic.201700815/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/71391
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 柳澤 慧

 

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