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

Yanagisawa Kei; Kitagawa Yuichi; Nakanishi Takayuki; Akama Tomoko; Kobayashi Masato; Seki Tomohiro; Fushimi Koji; Ito Hajime; Taketsugu Tetsuya; Hasegawa Yasuchika

Title	en Enhanced Luminescence of Asymmetrical Seven-Coordinate Eu-III Complexes Including LMCT Perturbation
Creator	en Yanagisawa, Kei en Kitagawa, Yuichi en Nakanishi, Takayuki NRID 1000030609855 en Akama, Tomoko en Kobayashi, Masato en Seki, Tomohiro NRID 1000050638187 en Fushimi, Koji NRID 1000020271645 en Ito, Hajime NRID 1000090282300 en Taketsugu, Tetsuya NRID 1000090280932 en Hasegawa, Yasuchika NRID 1000080324797
Accessrights	open access
Rights	en 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.
Subject	Other en Lanthanides Other en Luminescence Other en Charge transfer Other en Structure elucidation Other en Density functional calculations NDC 435
Description	Abstract en 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.
Publisher	en Wiley-Blackwell
Date	Issued2017-09-01
Language	eng
Resource Type	journal article
Version Type	AM
Identifier	HDL http://hdl.handle.net/2115/71391
Relation	isVersionOf DOI https://doi.org/10.1002/ejic.201700815
Journal	PISSN 1434-1948 en European journal of inorganic chemistry Volume Number32 Page Start3843 Page End3848
File	fulltext Article.pdf 576.59 KB (application/pdf) Issued2017-09-01
Oaidate	2023-07-26