RT Journal Article
T1 Exploring Coumarin-Based Boron Emissive Complexes as Temperature Thermometers in Polymer-Supported Materials
A1 Pedro, Gonçalo
A1 Duarte, Frederico
A1 Cheptsov, Dmitrii
A1 Yu Volodin, Nikita
A1 Ivanov, Ivan
A1 Santos, Hugo
A1 Capelo-Martinez, José Luis
A1 Cuerva de Alaiz, Cristian
A1 Oliveira, Elisabete
A1 Traven, Valerii
A1 Lodeiro, Carlos
AB Three coumarin-based boron complexes (L1, L2 and L3) were designed and successfully incorporated into polymeric matrixes for evaluation as temperature probes. The photophysical properties of the complexes were carried out in different solvents and in the solid state. In solution, compound L1 exhibited the highest fluorescence quantum yield, 33%, with a positive solvatochromism also being observed on the absorption and emission when the polarity of the solvent increased. Additionally in the presence of anions, L1 showed a colour change from yellow to pink, followed by a quenching in the emission intensity, which is due to deprotonation with the formation of a quinone base. Absorption and fluorescence spectra of L1 were calculated at different temperatures by the DFT/B3LYP method. The decrease in fluorescence of compound L1 with an increase in temperature seems to be due to the presence of pronounced torsional vibrations of the donor and acceptor fragments relative to the single bond with C(carbonyl)-C (styrene fragment). L1, L2 and L3, through their incorporation into the polymeric matrixes, became highly emissive by aggregation. These dye@doped polymers were evaluated as temperature sensors, showing an excellent fluorescent response and reversibility after 15 cycles of heating and cooling.
PB MDPI AG
SN 1424-8220
YR 2023
FD 2023
LK https://hdl.handle.net/20.500.14352/73411
UL https://hdl.handle.net/20.500.14352/73411
LA eng
NO Pedro, Gonçalo, et al. «Exploring Coumarin-Based Boron Emissive Complexes as Temperature Thermometers in Polymer-Supported Materials». Sensors, vol. 23, n.o 3, febrero de 2023, p. 1689. DOI.org (Crossref), https://doi.org/10.3390/s23031689.
NO Universidade Nova de Lisboa
NO Portuguese government 
DS Docta Complutense
RD 8 abr 2025