Volume 27, Issue 58 p. 14438-14443
Full Paper

Hybrid EuIII Coordination Luminophore Standing on Two Legs on Silica Nanoparticles for Enhanced Luminescence

Dr. Teng Zhang

Dr. Teng Zhang

Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021 Japan

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Dr. Yuichi Kitagawa

Dr. Yuichi Kitagawa

Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021 Japan

Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Ryoma Moriake

Ryoma Moriake

Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Pedro Paulo Ferreira da Rosa

Pedro Paulo Ferreira da Rosa

Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Dr. Md. Jahidul Islam

Dr. Md. Jahidul Islam

Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021 Japan

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Dr. Tomoki Yoneda

Dr. Tomoki Yoneda

Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Prof. Yasuhide Inokuma

Prof. Yasuhide Inokuma

Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021 Japan

Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Dr. Koji Fushimi

Dr. Koji Fushimi

Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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Prof. Yasuchika Hasegawa

Corresponding Author

Prof. Yasuchika Hasegawa

Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021 Japan

Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628 Japan

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First published: 18 August 2021
Citations: 1

Graphical Abstract

Hold tight, shine bright: A novel method for the development of lanthanide-based hybrid nanomaterials, taking advantage of an EuIII complex with an organic ligand covalently bound to the silica nanoparticle supports at two binding sites has been demonstrated. The hybrid nanoluminophore exhibited higher intrinsic luminescence quantum yield (93 %) and longer emission lifetime (0.98 ms), which is much larger than those of previous EuIII-based hybrid materials.

Abstract

In this study, we have demonstrated a two-legged, upright molecular design method for monochromatic and bright red luminescent LnIII-silica nanomaterials. A novel EuIII-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 1H, 31P, 29Si 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 EuIII-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 EuIII-based luminescent materials.

Conflict of interest

The authors declare no conflict of interest.