Lanthanide complexes for elevated temperature luminescence thermometry: Mixture vs bimetallic compound

Vialtsev, Mikhail B.; Tcelykh, Lyubov O.; Bobrovsky, Alexey; Utochnikova, Valentina V.

doi:10.1016/j.jallcom.2022.166421

Cited by 10 publications

(8 citation statements)

References 41 publications

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“…65% when the mixture film is heated. This is an extremely high value, which is several times higher than the highest sensitivity values for classic luminescent thermometry materials obtained to date (i.e., 31%/K at 4 K [ 22 ] and 12%/K at 125 K [ 23 ]), and an order of magnitude higher than that of thermometers at elevated temperature (i.e., 5.44%/K at 90 °C [ 24 ], 4%/K at 100 °C [ 25 ], 4.6%/K at 40 °C [ 26 ], 1.8%/K at 120 °C [ 27 ]). This value is also 15 times higher than the value obtained in our previous paper on temperature-dependent CPL [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

Temperature-Dependent Circularly Polarized Luminescence of a Cholesteric Copolymer Doped with a Europium Complex

et al. 2023

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The design of new materials for non-contact temperature sensors is an important task for scientists working in the fields of chemistry, physics, and materials science. In the present paper, a novel cholesteric mixture based on a copolymer doped with a highly luminescent europium complex was prepared and studied. It was found that the spectral position of the selective reflection peak strongly depends on temperature and a shift towards shorter wavelengths is observed upon heating with an amplitude of more than 70 nm, from the red to green spectral range. This shift is associated with the existence and melting of clusters of smectic order, as confirmed by X-ray diffraction investigations. The extreme temperature dependence of the wavelength of selective light reflection provides a high thermosensitivity of the degree of circular polarization of the europium complex emission. The highest values of the dissymmetry factor are observed when the peak of selective light reflection fully overlaps with the emission peak. As a result, the highest sensitivity of 65%/K for luminescent thermometry materials was obtained. In addition, the ability of the prepared mixture to form stable coatings was demonstrated. The obtained experimental results, i.e., the high thermosensitivity of the degree of circular polarization, and the ability to form stable coatings allow us to consider the prepared mixture as a promising material for luminescent thermometry.

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Section: Resultsmentioning

confidence: 99%

Temperature-Dependent Circularly Polarized Luminescence of a Cholesteric Copolymer Doped with a Europium Complex

et al. 2023

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“…The decisive advantage of possible remote and minimally invasive temperature measurements at those lateral dimensions is the reason for the growing popularity of the technique in recent years. [35,[44][45][46][47][48][49][50][51] Several phosphors have been investigated as luminescent thermometers such as organic dyes, [52][53][54] proteins, [55,56] polymers, [57][58][59] and materials doped with transition metal (TM) [60][61][62] and trivalent lanthanide (Ln 3+ ) ions, including chelate complexes, [19,[63][64][65][66] polymers, [67][68][69] metal-organic frameworks (MOFs), [70][71][72] and organic-inorganic hybrids. [73][74][75] At the nanoscale, the most employed phosphors are molecular beacons, [76] quantum dots (QDs), [77][78][79] carbon dots, [80][81][82] Au nanoclusters, [83,84] semiconductor [85][86]…”

Section: Introductionmentioning

confidence: 99%

“…Several phosphors have been investigated as luminescent thermometers such as organic dyes, [ 52–54 ] proteins, [ 55,56 ] polymers, [ 57–59 ] and materials doped with transition metal (TM) [ 60–62 ] and trivalent lanthanide (Ln 3+ ) ions, including chelate complexes, [ 19,63–66 ] polymers, [ 67–69 ] metal–organic frameworks (MOFs), [ 70–72 ] and organic–inorganic hybrids. [ 73–75 ] At the nanoscale, the most employed phosphors are molecular beacons, [ 76 ] quantum dots (QDs), [ 77–79 ] carbon dots, [ 80–82 ] Au nanoclusters, [ 83,84 ] semiconductor [ 85–88 ] and spin crossover [ 89 ] nanoparticles (NPs), nanodiamonds, [ 34,90–92 ] heater‐thermometer nanoplatforms, [ 93–97 ] and upconversion (UC) [ 98–100 ] and conventional (downshifting) [ 101–104 ] luminescent NPs.…”

Section: Introductionmentioning

confidence: 99%

Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

et al. 2023

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Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of the luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes and risetimes) of a phosphor to measure temperature. This technique provides precise thermal readouts with superior spatial resolution in short acquisition times. Although luminescence thermometry is just starting to become a more mature subject, it exhibits enormous potential in several areas, e.g., optoelectronics, photonics, micro‐ and nanofluidics, and nanomedicine. This work reviews the latest trends in the field, including the establishment of a comprehensive theoretical background and standardized practices. The reliability, repeatability, and reproducibility of the technique are also discussed, along with the use of multiparametric analysis and artificial‐intelligence algorithms to enhance thermal readouts. In addition, examples are provided to underscore the challenges that luminescence thermometry faces, alongside the need for a continuous search and design of new materials, experimental techniques, and analysis procedures to improve the competitiveness, accessibility, and popularity of the technology

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“…As the objects of study, a mixture of terbium and europium complexes [Tb(Bz) 3 Phen] 2 and [Eu(Bz) 3 Phen] 2 (HBz = benzoic acid, Phen = o-phenanthroline) [18,21], doped into one of the polymers from Figure 1, was selected. These polyimide matrices were selected for their well-known high thermal stability [22].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Highly Emissive Luminescent Thermometers for Elevated Temperatures Based on Lanthanide-Doped Polymers

et al. 2023

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Lanthanide coordination compounds contining multiple lanthanides are the most promising candidate materials for luminescent thermometry. Sensing elevated temperatures requires highly stable complexes and matrices, such as those of thermally stable polymers. However, most high-temperature polymers are not optically inert, and this can affect their thermometric properties, including decreasing their intensity and sensitivity. In the present paper, the proper selection of the combination of a matrix and two emitters allowed us to obtain a highly sensitive and highly emissive luminescent thermometry material, 1{5[Tb(Bz)3Phen]2+1[Eu(Bz)3Phen]2}:4PI4050, based on terbium and europium complexes in poly(ethylene glycol) diacrylate (PI4050), which is suitable for the detection of temperatures up to 200 °C.

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Lanthanide complexes for elevated temperature luminescence thermometry: Mixture vs bimetallic compound

Cited by 10 publications

References 41 publications

Temperature-Dependent Circularly Polarized Luminescence of a Cholesteric Copolymer Doped with a Europium Complex

Temperature-Dependent Circularly Polarized Luminescence of a Cholesteric Copolymer Doped with a Europium Complex

Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Highly Sensitive and Highly Emissive Luminescent Thermometers for Elevated Temperatures Based on Lanthanide-Doped Polymers

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