TY - JOUR
T1 - Lanthanide Luminescence Enhancement of Core-Shell Magnetite-SiO2Nanoparticles Covered with Chain-Structured Helical Eu/Tb Complexes
AU - Goderski, Szymon
AU - Kanno, Shuhei
AU - Yoshihara, Koushi
AU - Komiya, Hiroaki
AU - Goto, Kenta
AU - Tanaka, Takeshi
AU - Kawaguchi, Shogo
AU - Ishii, Ayumi
AU - Shimoyama, Jun Ichi
AU - Hasegawa, Miki
AU - Lis, Stefan
N1 - Funding Information:
The authors acknowledge Professor Dr. Osamu Hashimoto, the Dean of College of Science and Engineering, AGU, for his kind support for the international collaboration. This work was supported by grant no. POWR.03.02.00-00-I023/17 co-financed by the European Union through the European Social Fund under the Operational Program Knowledge Education Development and Grants-in-aid from Scientific Research on Innovative Areas of KAKENHI, MEXT “Soft Crystals (area number: 2903)” (no. 17H06374). S.G. work was supported by the Polish National Science Center, grant number: 2017/25/N/ST5/00996. This work was the result of using research equipment shared in MEXT Project for promoting public utilization of advanced research infrastructure (Program for supporting introduction of the new sharing system) Grant Number JPMXS0422300120 (M.H.).
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/12/29
Y1 - 2020/12/29
N2 - Oligomeric-brush chains of helical lanthanide (Ln) complexes retain their structural and luminescent behavior after coating onto magnetic nanoparticles (MNPs) consisting of Fe3O4 covered with silicate. It is one of the type of bifunctional NPs exhibiting luminescence of Ln and superparamagnetism of Fe3O4. In comparison to a simple monolayer of complexes adsorbed on a modified surface, a layer made of luminescent chains allowed us to obtain a more intensive red/green luminescence originating from Eu3+/Tb3+ ions, and at the same time, no visible increase in particle size (compared to Fe3O4@silica particles) was observed. The luminescent properties of the Tb3+ complex were altered by MNPs; the decrease of the luminescence was not as large as expected, the excitation spectrum changed significantly, and the average luminescence lifetime was much longer at room temperature. Surprisingly, this phenomenon was not observed at 77 K and also did not occur for the Eu3+ complexes. The possibility to stack building blocks in a chain using complexes of different lanthanide ions can be used to design novel multifunctional nanosystems.
AB - Oligomeric-brush chains of helical lanthanide (Ln) complexes retain their structural and luminescent behavior after coating onto magnetic nanoparticles (MNPs) consisting of Fe3O4 covered with silicate. It is one of the type of bifunctional NPs exhibiting luminescence of Ln and superparamagnetism of Fe3O4. In comparison to a simple monolayer of complexes adsorbed on a modified surface, a layer made of luminescent chains allowed us to obtain a more intensive red/green luminescence originating from Eu3+/Tb3+ ions, and at the same time, no visible increase in particle size (compared to Fe3O4@silica particles) was observed. The luminescent properties of the Tb3+ complex were altered by MNPs; the decrease of the luminescence was not as large as expected, the excitation spectrum changed significantly, and the average luminescence lifetime was much longer at room temperature. Surprisingly, this phenomenon was not observed at 77 K and also did not occur for the Eu3+ complexes. The possibility to stack building blocks in a chain using complexes of different lanthanide ions can be used to design novel multifunctional nanosystems.
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U2 - 10.1021/acsomega.0c03746
DO - 10.1021/acsomega.0c03746
M3 - Article
AN - SCOPUS:85098970722
SN - 2470-1343
VL - 5
SP - 32930
EP - 32938
JO - ACS Omega
JF - ACS Omega
IS - 51
ER -