Single Excited Dual Band Luminescent Hybrid Carbon Dots-Terbium Chelate Nanothermometer
The report introduces hybrid polyelectrolyte-stabilized colloids combining blue and green-emitting building blocks, which are citrate carbon dots (CDs) and [TbL]<sup>+</sup> chelate complexes with 1,3-diketonate derivatives of calix[4]arene. The joint incorporation of green and blue-emit...
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| Main Authors: | , , , , , , , , , , |
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| Format: | article |
| Language: | EN |
| Published: |
MDPI AG
2021
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| Subjects: | |
| Online Access: | https://doaj.org/article/738eedfe49974a1f82adf7b58f65c6a1 |
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| Summary: | The report introduces hybrid polyelectrolyte-stabilized colloids combining blue and green-emitting building blocks, which are citrate carbon dots (CDs) and [TbL]<sup>+</sup> chelate complexes with 1,3-diketonate derivatives of calix[4]arene. The joint incorporation of green and blue-emitting blocks into the polysodium polystyrenesulfonate (PSS) aggregates is carried out through the solvent-exchange synthetic technique. The coordinative binding between Tb<sup>3+</sup> centers and CD surface groups in initial DMF solutions both facilitates joint incorporation of [TbL]<sup>+</sup> complexes and the CDs into the PSS-based nanobeads and affects fluorescence properties of [TbL]<sup>+</sup> complexes and CDs, as well as their ability for temperature sensing. The variation of the synthetic conditions is represented herein as a tool for tuning the fluorescent response of the blue and green-emitting blocks upon heating and cooling. The revealed regularities enable developing either dual-band luminescent colloids for monitoring temperature changes within 25–50 °C through double color emission or transforming the colloids into ratiometric temperature sensors via simple concentration variation of [TbL]<sup>+</sup> and CDs in the initial DMF solution. Novel hybrid carbon dots-terbium chelate PSS-based nanoplatform opens an avenue for a new generation of sensitive and customizable single excited dual-band nanothermometers. |
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