A Ho³⁺‐Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range

Abstract

on luminescence thermometry offers an alternative that is capable of measuring heat generation and diffusion on the microscopic scale. [3] Among the various choices of luminescent systems, [4-9] crystals doped with lanthanide (Ln 3+) ions represent a particularly promising class of luminescent thermometers, because their dimensions can be tuned from a few nanometers to several micrometers and their photoluminescence spectrum is sensitive to temperature. A characteristic feature of Ln 3+ ions is their rich energy level structure, which results in emission spectra with well-separated lines. Typically, the luminescence intensity ratio (LIR) between two of these emission lines is used as a sensitive measure for the temperature of the Ln 3+-doped crystal. After insertion of these ratiometric thermometers into a system of interest, remote operation simply involves excitation by light and detection of the luminescence with standard spectroscopic equipment. The performance of a ratiometric thermometer is determined by how sensitively the LIR reacts to temperature. In general, the performance at a given temperature (T) is quantified in terms of the relative sensitivity [10]

Rationalizing the Thermal Response of Dual‐Center Molecular Thermometers: The Example of an Eu/Tb Coordination Complex

“…Our days, luminescence thermometry (also called thermographic phosphor thermometry) is in the spotlight of materials science and engineering research representing around 5% of systems [39,45] ) and dual-center examples in which energy transfer drives the thermometric performance. [28,42,[48][49][50][51][52] A theoretical framework for describing ratiometric single-ion Boltzmann-based thermometers was recently established [39] and these systems are one of the very few examples of luminescent primary thermometers, [53] in which the temperature can be predicted without a previous calibration procedure. However, these Boltzmann-based luminescent thermometers are generally ineffective above ≈400 K [38,39] and their relative thermal sensitivity (S r ) rarely exceeds 1%⋅K −1 , which can be a constrain in certain applications.…”

Energy transfer-triggered multicolor emissions in Tb3+/Eu3+-coactivated Y2Mo3O12 negative thermal expansion microparticles for dual-channel tunable luminescent thermometers

“…22 In particular, these two peaks centered at 957. 3 Please do not adjust margins Please do not adjust margins asymmetric stretching vibrations of the MoO 4 tetrahedron, respectively, whereas the band at 323.7 cm -1 is assigned to asymmetric and symmetric bending motions in both the YO 6 octahedron and MoO 4 tetrahedron. 22 Inspired by these characteristics, we can conclude that the dopants are successfully induced into the YMO host lattices and the resultant NTE microparticles present pure orthorhombic crystal structure.…”

“…Optical thermometer based on rare-earth ions activated luminescent materials has attracted much attention because of its admirable advantages including high resolution, non-contact characteristic, fast response, etc. [1][2][3] Generally, via taking the advantage of the various thermal quenching performances of two emissions originating from thermally coupled levels (i.e., TCLs) of rare-earth ions, the ratiometric thermometry is realized by utilizing the fluorescence intensity ratio (i.e., FIR) technology. 4,5 Based on the temperature-dependent emission intensities of 2 H 11/2 and 4 S 3/2 TCLs of Er 3+ ions, Zhang et al, discovered that the absolute sensitivity (i.e., S a ) of Gd 9.33 (SiO 4 ) 6 O 2 :Er 3+ /Yb 3+ phosphors was 0.00464 K -1 .…”

Synthesis of Two New Dinuclear Lanthanide Clusters and Visual Bifunctional Sensing Devices Based on the Eu Cluster

“…[1a,12d] However, the luminescence of lanthanide complex is easily interfered by the surrounding environment, thereby achieving the excellent sensing behavior. [16] Up to now, lanthanide complexes-based materials have been commonly used as probes for sensing cations, [17] anions, [18] nitro explosives, [19] biomarkers, [4,20] gases, [11] small organic molecules, [21] temperature, [22] pH, [23] and so on. [24] Although bi-functional sensors have been widely reported, almost all of them are recognized in a single optical mode, and it is still a challenge to identify both analytes by multi-mode optical response.…”