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Electronic chirality inversion of lanthanide complex induced by achiral molecules
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| Title: | Electronic chirality inversion of lanthanide complex induced by achiral molecules |
| Authors: | Wada, Satoshi Browse this author | | Kitagawa, Yuichi Browse this author | | Nakanishi, Takayuki Browse this author | | Gon, Masayuki Browse this author | | Tanaka, Kazuo Browse this author | | Fushimi, Koji Browse this author | | Chujo, Yoshiki Browse this author | | Hasegawa, Yasuchika Browse this author →KAKEN DB |
| Issue Date: | 6-Nov-2018 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Scientific reports |
| Volume: | 8 |
| Start Page: | 16395 |
| Publisher DOI: | 10.1038/s41598-018-34790-0 |
| Abstract: | 3A novel mechanism for chiroptical activity inversion based on the electronic structure of metal complexes without Lambda- or Delta-type structure change was demonstrated spectroscopically and theoretically. To demonstrate the mechanism, a europium (Eu(III)) complex with chiral (+)-3-(trifluoroacetyl) camphor (+tfc) and achiral triphenylphosphine oxide (tppo) was prepared. The steric and electronic structures of the Eu(III) complex were adjusted by additional achiral tppo and coordinating acetone molecules, and were characterised by H-1 NMR, photoluminescence, and emission lifetime measurements. The optical activity of the Eu(III) complex in solution was evaluated by circularly polarized luminescence (CPL) measurements. CPL sign inversion, which was independent of Lambda- or Delta-type structure changes from the spectroscopic viewpoint, and a drastic CPL intensity enhancement were observed depending on the external achiral molecules around Eu(III) ion. These phenomena provide the first clarification of optical activity change associated with electronic structure rather than chiral coordination structure-type (Lambda or Delta) under external environments. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72145 |
| 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)
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Submitter: 長谷川 靖哉
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