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Hybrid Eu-III Coordination Luminophore Standing on Two Legs on Silica Nanoparticles for Enhanced Luminescence

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Title: Hybrid Eu-III Coordination Luminophore Standing on Two Legs on Silica Nanoparticles for Enhanced Luminescence
Authors: Zhang, Teng Browse this author
Kitagawa, Yuichi Browse this author →KAKEN DB
Moriake, Ryoma Browse this author
da Rosa, Pedro Paulo Ferreira Browse this author
Islam, Md Jahidul Browse this author
Yoneda, Tomoki Browse this author
Inokuma, Yasuhide Browse this author
Fushimi, Koji Browse this author →KAKEN DB
Hasegawa, Yasuchika Browse this author →KAKEN DB
Keywords: europium complexes
Issue Date: 19-Oct-2021
Publisher: Wiley-Blackwell
Journal Title: Chemistry-A European journal
Volume: 27
Issue: 58
Start Page: 14438
End Page: 14443
Publisher DOI: 10.1002/chem.202102156
Abstract: In this study, we have demonstrated a two-legged, upright molecular design method for monochromatic and bright red luminescent Ln(III)-silica nanomaterials. A novel Eu-III-silica hybrid nanoparticle was developed by using a doubly binding TPPO-Si(OEt)(3) (TPPO: triphenyl phosphine oxide) linker. The TPPO-Si(OEt)(3) was confirmed by H-1, P-31, Si-29 NMR spectroscopy and single-crystal X-ray analysis. Luminescent Eu(hfa)(3) and Eu(tfc)(3) moieties (hfa: hexafluoroacetylacetonate, tfc: 3-(trifluoromethylhydroxymethylene)camphorate) were fixed onto TPPO-Si(OEt)(3)-modified silica nanoparticles, producing Eu(hfa)(3)(TPPO-Si)(2)-SiO2 and Eu(tfc)(3)(TPPO-Si)(2)-SiO2, respectively. Eu(hfa)(3)(TPPO-Si)(2)-SiO2 exhibited the higher intrinsic luminescence quantum yield (93 %) and longer emission lifetime (0.98 ms), which is much larger than those of previously reported Eu-III-based hybrid materials. Eu(tfc)(3)(TPPO-Si)(2)-SiO2 showed an extra-large intrinsic emission quantum yield (54 %), although the emission quantum yield for the precursor Eu(tfc)(3)(TPPO-Si(OEt)(3))(2) was found to be 39 %. These results confirmed that the TPPO-Si(OEt)(3) linker is a promising candidate for development of Eu-III-based luminescent materials.
Rights: This is the peer reviewed version of the following article: T. Zhang, Y. Kitagawa, Y. Hasegawa, Chem.-Eur. J., 2021, 27(58), 14438, which has been published in final form at 10.1002/chem.202102156. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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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