Boosting the sensitivity of Nd<sup>3+</sup>-based luminescent nanothermometers

Balabhadra, Sangeetha; Debasu, Mengistie L.; Brites, Carlos D. S.; Nunes, Luiz Antônio de Oliveira; Malta, O.L.; Rocha, João; Bettinelli, Marco; Carlos, Luís D.

doi:10.1039/c5nr05631d

Cited by 221 publications

(113 citation statements)

References 45 publications

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“…Most often the steady state intensity of one (or two) transition(s), or the luminescence lifetime is used. 30 As Ln 3+ emission in the NIR region is in general much weaker then in the Vis region, NIR emitting thermometers are substantially less frequently reported.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

et al. 2017

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Two materials -a mesoporous silica (MS) and a periodic mesoporous organosilica (PMO) functionalized with dipyridyl-pyridazine (dppz) units were grafted with near-infrared (NIR) emitting lanthanide (Nd ) complexes in an attempt to obtain hybrid NIR emitting materials. The parent materials: dppzvSilica and dppz-ePMO were prepared by a hetero Diels-Alder reaction between 3,6-di(2-pyridyl)-1,2,4,5-tetrazine (dptz) and the double bonds of either ethenylene-bridged PMO (ePMO) or vinyl-silica (vSilica) and subsequent oxidation. The dppz-vSilica is reported here for the first time. The prepared lanthanide-PMO/silica hybrid materials were studied in depth for their luminescence properties at room temperature and chosen Nd 3+ and Yb 3+ samples also at low temperature (as low as 10 K). We show that both the dppz-vSilica and dppz-ePMO materials can be used as "platforms" for obtaining porous materials showing NIR luminescence. To obtain NIR emission these materials can be excited either in the UV or Vis region (into the π → π* transitions of the ligands or directly into the f-f transitions of the Ln 3+ ions). More interestingly, when functionalized with Nd 3+ or Yb 3+ β-diketonate complexes these materials showed interesting luminescence properties over a wide temperature range (10-360 K). The Yb 3+ materials were investigated for their potential use as ratiometric temperature sensors.

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Section: Introductionmentioning

confidence: 99%

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

et al. 2017

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“…The sensitivity was found to be 0.00252 K −1 at 423 K, using Nd 3+ sensitized Er 3+ in the NaLuF 4 host . In addition to the upconversion emission based temperature sensing, the emissions of Nd 3+ ions (e.g., emission bands located between 800–900 nm and 930–960 nm) can also be used as ratiometric temperature probes …”

Section: Applicationsmentioning

confidence: 99%

Emerging ≈800 nm Excited Lanthanide‐Doped Upconversion Nanoparticles

Xie

Zhang

et al. 2016

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Lanthanide-doped upconversion nanoparticles can tune near-infrared light to visible or even ultra-violet light in emissions. Due to their unique photophysical and photochemical properties, as well as their promising bioapplications, there has been a great deal of enthusiastic research performed to study the properties of lanthanide-doped upconversion nanoparticles in the past few years. Despite the considerable progress in this area, numerous challenges associated with the nanoparticles, such as a low upconversion efficiency, limited host materials, and a confined excitation wavelength, still remain, thus hindering further development with respect to their applications and in fundamental science. Recently, innovative strategies that utilize alternative sensitizers have been designed in order to engineer the excitation wavelengths of upconversion nanoparticles. Here, focusing on the excitation wavelength at ≈800 nm, recent advances in the design, property tuning, and applications of ≈800 nm excited upconversion nanoparticles are summarized. Benefiting from the unique features of ≈800 nm light, including deep tissue penetration depth and low photothermal effect, the ≈800 nm excited upconversion nanoparticles exhibit superior potential for biosensing, bioimaging, drug delivery, therapy, and three dimensional displays. The critical aspects of such emerging nanoparticles with regards to meeting the ever-changing needs of future development are also discussed.

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“…Currently, luminescent materials doped with rare‐earth (RE) ions have wide applications in many fields, such as optical temperature sensors, photosensitive devices, and solar cells, owing to the characteristic energy level structure and admirable luminescent emission properties of the RE ions . In terms of the upconversion (UC) mission, it can convert the low‐energy light to the high‐energy light by a multiphoton absorption process .…”

Section: Introductionmentioning

confidence: 99%

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics

et al. 2019

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In this work, we have prepared a novel (K0.5Na0.5)0.99‐xPrxYb0.01NbO3 (abbreviated as KNN:xPr3+/0.01Yb3+, x = 0.0006, 0.0008, 0.001, 0.002, 0.003, and 0.004) ceramics, which possess visible UC emissions, photochromic (PC) and optical thermometric properties. Under the excitation of a 980‐nm diode laser, all the samples show the featured emissions of Pr3+ ions and the UC emission intensity is greatly dependent on the Pr3+ doping content. The optimal UC luminescence intensity is obtained at x = 0.001. All the prepared samples show a strong PC reaction, and a large luminescence quenching degree (ΔRt) of 74.94% is found. The optical thermometric properties of both the irradiated and unirradiated KNN:0.001Pr3+/0.01Yb3+ ceramics in the temperature range of 123‐573 K have been investigated via measuring the temperature‐dependent UC emission spectra of green emissions, which originate from the two 3P1 and 3P0 thermally coupled levels. It has been found that the prepared samples have both excellent PC behaviors and temperature‐sensing performances. These results suggest that the KNN:xPr3+/0.01Yb3+ ceramics are promising candidates for the applications in PC reaction and thermometers.

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Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Cited by 221 publications

References 45 publications

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

Emerging ≈800 nm Excited Lanthanide‐Doped Upconversion Nanoparticles

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics

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Boosting the sensitivity of Nd3+-based luminescent nanothermometers

Cited by 221 publications

References 45 publications

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

Temperature dependent NIR emitting lanthanide-PMO/silica hybrid materials

Emerging ≈800 nm Excited Lanthanide‐Doped Upconversion Nanoparticles

Reversible luminescence modulation and temperature‐sensing properties of Pr3+/Yb3+ codoped K0.5Na0.5NbO3 ceramics

Contact Info

Product

Resources

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Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics