open access

https://hdl.handle.net/2115/95155

Chiral Tetrakis Eu(III) Complexes with Ammonium Cations for Improved Circularly Polarized Luminescence

英語

lanthanides

2024-08-19

Wiley-Blackwell

Angewandte chemie-international edition

63(34)

e202405584

Large dissymmetry factor of the circularly polarized luminescence (gCPL) was observed in ligand and coordination tuned chiral tetrakis europium (Eu(III)) complexes with ammonium cations. The gCPL value was estimated to be -1.54, which is the largest among chiral luminescent molecules. Through photophysical measurements, single crystal X-ray structural analyses and quantum chemical calculations, changes in the geometric and electronic structures were observed for a series of chiral tetrakis Eu(III) complexes which enhanced the gCPL value. The emission quantum yield and photosensitized energy transfer efficiencies of chiral Eu(III) complexes with ammonium cations were also larger than those of chiral Eu(III) complex with Cs+. Based on the systematic modifications and analyses for chiral tetrakis Eu(III) complex, effect of the ammonium cation on enhanced CPL brightness is reported. Chiral tetrakis Eu(III) complexes with ammonium cations exhibited large dissymmetry factor of the circularly polarized luminescence (gCPL=-1.54), which is the largest among chiral luminescent molecules. Based on the systematic modifications and analyses for chiral tetrakis Eu(III) complex, effect of the ammonium cation on enhanced CPL brightness is reported.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: M. Tsurui, R. Takizawa, Y. Kitagawa, M. Wang, M. Kobayashi, T. Taketsugu, Y. Hasegawa, Angew. Chem. Int. Ed. 2024, 63, e202405584, which has been published in final form at https://doi.org/10.1002/anie.202405584. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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