Long‐Range LMCT Coupling in Eu III Coordination Polymers for an Effective Molecular Luminescent Thermometer**
| Autor: | Yuichi Kitagawa, Pedro Paulo Ferreira da Rosa, Yasuchika Hasegawa, Marina Kumagai, Koji Fushimi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chrysene
Phosphine oxide Lanthanide chemistry.chemical_classification 010405 organic chemistry Coordination polymer Organic Chemistry Intermolecular force Quantum yield General Chemistry Polymer 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Physical chemistry Luminescence |
| Zdroj: | Chemistry – A European Journal. 27:264-269 |
| ISSN: | 1521-3765 0947-6539 |
| DOI: | 10.1002/chem.202002628 |
| Popis: | A design for an effective molecular luminescent thermometer based on long-range electronic coupling in lanthanide coordination polymers is proposed. The coordination polymers are composed of lanthanide ions EuIII and GdIII , three anionic ligands (hexafluoroacetylacetonate), and a chrysene-based phosphine oxide bridges (6,12-bis(diphenylphosphoryl)chrysene). The zig-zag orientation of the single polymer chains induces the formation of packed coordination structures containing multiple sites for CH-F intermolecular interactions, resulting in thermal stability above 350 °C. The electronic coupling is controlled by changing the concentration of the GdIII ion in the EuIII -GdIII polymer. The emission quantum yield and the maximum relative temperature sensitivity (Sm ) of emission lifetimes for the EuIII -GdIII polymer (Eu:Gd=1:1, Φtot =52 %, Sm =3.73 % K-1 ) were higher than those for the pure EuIII coordination polymer (Φtot =36 %, Sm =2.70 % K-1 ), respectively. Enhanced temperature sensing properties are caused by control of long-range electronic coupling based on phosphine oxide with chrysene framework. |
| Databáze: | OpenAIRE |
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