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Ultrasound-Assisted Synthesis of Luminescent Micro- and Nanocrystalline Eu-Based MOFs as Luminescent Probes for Heavy Metal Ions
| Content Provider | MDPI |
|---|---|
| Author | Kolesnik, Stefaniia S. Nosov, Viktor G. Kolesnikov, Ilya E. Khairullina, Evgenia M. Tumkin, Ilya I. Vidyakina, Aleksandra A. Sysoeva, Alevtina A. Ryazantsev, Mikhail N. Panov, Maxim S. Khripun, Vasiliy D. Bogachev, Nikita A. Skripkin, Mikhail Yu. Mereshchenko, Andrey S. |
| Copyright Year | 2021 |
| Description | The luminescent coarse-, micro- and nanocrystalline europium(III) terephthalate tetrahydrate $(Eu_{2}bdc_{3}·4H_{2}$O) metal-organic frameworks were synthesized by the ultrasound-assisted wet-chemical method. Electron micrographs show that the europium(III) terephthalate microparticles are 7 μm long leaf-like plates. According to the dynamic light scattering technique, the average size of the $Eu_{2}bdc_{3}·4H_{2}$O nanoparticles is equal to about 8 ± 2 nm. Thereby, the reported $Eu_{2}bdc_{3}·4H_{2}$O nanoparticles are the smallest nanosized rare-earth-based MOF crystals, to the best of our knowledge. The synthesized materials demonstrate red emission due to the$ $^{5}D_{0}–^{7}$F_{J}$ transitions of $Eu^{3+}$ upon 250 nm excitation into$ ^{1}$ππ* state of the terephthalate ion. Size reduction results in broadened emission bands, an increase in the non-radiative rate constants and a decrease in both the quantum efficiency of the$ $^{5}$D_{0}$ level and $Eu^{3+}$ and the luminescence quantum yields. $Cu^{2+}$, $Cr^{3+}$, and $Fe^{3+}$ ions efficiently and selectively quench the luminescence of nanocrystalline europium(III) terephthalate, which makes it a prospective material for luminescent probes to monitor these ions in waste and drinking water. |
| Starting Page | 2448 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11092448 |
| Journal | Nanomaterials |
| Issue Number | 9 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-20 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Inorganic Chemistry Metal-organic Framework Luminescence Rare Earth Europium Nanoparticle Luminescent Probe |
| Content Type | Text |
| Resource Type | Article |
