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1D-Zigzag $Eu^{3+}/Tb^{3+}$ Coordination Chains as Luminescent Ratiometric Thermometers Endowed with Multicolor Emission
| Content Provider | MDPI |
|---|---|
| Author | Daniela, Belli Dell'Amico Bellucci, Luca Bottaro, Gregorio Labella, Luca Marchetti, Fabio Samaritani, Simona Armelao, Lidia |
| Copyright Year | 2021 |
| Description | Two homometallic Coordination Polymers (CPs) with composition $[Ln(hfac)_{3}bipy]_{n}$ $(Ln^{3+}$ = $Eu^{3+}$, 1, and $Tb^{3+}$, 2; hfac = hexafluoroacetylacetonato, bipy = 4,4′-bipyridine) were used to develop a family of ratiometric luminescent thermometers containing $Eu^{3+}$ and $Tb^{3+}$ as red and green emitters, respectively. The thermometric properties of pure CPs and of their mixtures having an $Eu^{3+}/Tb^{3+}$ molar ratio of 1:1, 1:3, 1:5, and 1:10 (samples: Eu1Tb1, Eu1Tb3, Eu1Tb5, and Eu1Tb10) were studied in the 83–383 K temperature range. Irrespective of the chemical composition, we observed similar thermometric responses characterized by broad applicative temperature ranges (from 100 to 165 K wide), and high relative thermal sensitivity values $(S_{r}$), up to 2.40% $K^{−1}$, in the physiological temperature range (298–318 K). All samples showed emissions endowed with peculiar and continuous color variation from green (83 K) to red (383 K) that can be exploited to develop a colorimetric temperature indicator. At fixed temperature, the color of the emitted light can be tuned by varying composition and excitation wavelength. |
| Starting Page | 6445 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14216445 |
| Journal | Materials |
| Issue Number | 21 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-27 |
| Access Restriction | Open |
| Subject Keyword | Materials Spectroscopy Luminescence Europium Terbium Lanthanide Coordination Polymers Luminescent Molecular Thermometers Ratiometric Thermometers |
| Content Type | Text |
| Resource Type | Article |
