Shortwave Ultraviolet Persistent Luminescence of Sr2MgSi2O7: Pr3+

Antuzevičš, Andris; Doke, Guna; Krieķe, Guna; Rodionovs, Pavels; Nilova, Dace; Cirulis, Jekabs; Fedotovs, A.; Rogulis, U.

doi:10.3390/ma16051776

Cited by 5 publications

(3 citation statements)

References 84 publications

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“…The choice of active Pr3+ ion concentrations in SCMS glasses is determined by a tradeoff between the praseodymium absorption qualities, especially at the excitation wavelength of 445 nm, and the ability to measure the up-conversion spectra of the material in the ultraviolet region as well as an emission in a wide spectral range. The ionic radii of the involved ions are the following: Mg 2+ (0.66 Å), Ca 2+ (0.99 Å) [17], (0.94 Å [11]), Pr 3+ (1.126 Å) [18], and Sr 2+ (1.260 Å [18]).…”

Section: Methodsmentioning

confidence: 99%

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

Bezkrovna,

Lisiecki,

Macalik

et al. 2024

Materials

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The application of ultraviolet-C light in the field of surface treatment or photodynamic therapy is highly prospective. In this regard, the stable fluorescent silicate SrO-CaO-MgO-SiO2-Pr2O3 glasses able to effectively convert visible excitation on the ultraviolet praseodymium emission were fabricated and examined. An unusual wide-range visible-to-UVC up-conversion within 240–410 nm has been achieved in Pr3+-doped glasses, revealing their potential advantage in different sophisticated disinfection technologies. The integrated emission intensity was studied as a function of light excitation power to assess a mechanism attributed to UVC luminescence. Especially, it was revealed that the multicomponent silicate glass qualities and praseodymium 3PJ excited state peculiarities are favorable to obtaining useful broadband ultraviolet up-converted luminescence. The glass dispersion qualities were determined between 450–2300 nm. The impact of praseodymium concentration on Vis-NIR spectroscopic glass qualities was evaluated employing absorption spectra, emission spectra, and decay curves of luminescence associated with two involved praseodymium excited states. Especially, efficient interionic interactions can be inferred by investigating the decrease in 1D2 state experimental lifetime in the heavily doped samples. Examination of absorption spectra as a function of temperature implied that excitation at 445 nm should be quite effective up to T = 625 K. Contrary to this, temperature elevation gives rise to a moderate lowering of the visible praseodymium luminescence.

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Section: Methodsmentioning

confidence: 99%

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

Bezkrovna,

Lisiecki,

Macalik

et al. 2024

Materials

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“…[31][32][33] Moreover, Si-based melilites doped with different rare earth elements exhibit ultraviolet (UV) persistent luminescent properties after UV or X-ray excitation. [34][35][36][37][38][39] Datolite and homilite Ca 2 Fe 2+ B 2 Si 2 O 8 O 2 are members of the datolite subgroup of the gadolinite mineral group with the general formula A 2 MQ 2 Si 2 O 8 ϕ 2 , where A-Ca, Y and lanthanides, M-Fe 2+ or vacancy, Q-B or Be, ϕ-O or OH. 40 Both datolite and homilite have a relatively simple chemical composition, consisting of elements common in the Earth's crust.…”

Section: Introductionmentioning

confidence: 99%

“…Although the magnetic properties of silicate members of this structural family have not been studied in detail, it has recently been shown that the substitution of Ge for Si can also be very promising 31–33 . Moreover, Si‐based melilites doped with different rare earth elements exhibit ultraviolet (UV) persistent luminescent properties after UV or X‐ray excitation 34–39 …”

Section: Introductionmentioning

confidence: 99%

Topotactic transformation of gadolinite‐ to melilite‐type structure revisited

Gorelova,

Vereshchagin,

Shagova

et al. 2024

J Am Ceram Soc.

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Topotactic reactions can lead to the formation of new phases, which cannot be obtained via classical synthesis methods. The high‐temperature topotactic transformation of gadolinite‐type compounds, homilite Ca2Fe2+B2Si2O8O2 and datolite Ca2□B2Si2O8(OH)2, into a melilite‐type compound, okayamalite Ca2B2SiO7, was studied by in situ high‐temperature single‐crystal X‐ray diffraction and ex situ Raman spectroscopy. Furthermore, the density functional theory was used to calculate the electronic structures and Raman spectra of datolite, homilite, and okayamalite. At low temperatures (250–500°C), homilite undergoes the Fe oxidation process, whereas at high temperatures, both homilite and datolite transform into okayamalite (750 and 780°C, respectively). The transformation of datolite into okayamalite is a conversion of a single crystal to a polycrystalline aggregate, while the transformation of homilite into okayamalite is a transformation of a single crystal to a single crystal. Datolite derived from okayamalite is similar to natural okayamalite, whereas homilite derived from okayamalite shows Fe3+ for Si/B substitution. The existence of tetrahedrally coordinated Fe3+ leads to a stabilizing effect, resulting in the formation of a single crystal of okayamalite. In addition, the incorporation of iron into the structure of okaymalite leads to a change in the thermal behavior of the compound (α11 = 22 and 15×10−6°C–1 for datolite‐derived and homilite‐derived okayamalites, respectively). However, the thermal expansion of okayamalites is almost isotropic, which is typical for melilite‐type compounds.datolite, high‐temperature, homilite, okayamalite, topotactic reaction

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Current Developments in Emerging Lanthanide‐Doped Persistent Luminescent Scintillators and Their Applications

Ye,

Li,

Chen

et al. 2024

Chemistry A European J

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Lanthanide‐doped scintillators have the ability to convert the absorbed X‐ray irradiation into ultraviolet (UV), visible (Vis), or near‐infrared (NIR) light. Lanthanide‐doped scintillators with excellent persistent luminescence are emerging as a new class of persistent luminescent materials recently. They have attracted great attention due to their unique "self‐luminescence" characteristic and potential applications. In this review, we comb through and focus on current developments of lanthanide‐doped persistent luminescent scintillators (PerLSs), including their persistent luminescence mechanism, synthetic methods, tuning of persistent luminescent properties (e.g. emission wavelength, intensity, and duration time), as well as their promising applications (e.g. information storage, encryption, anti‐counterfeiting, bio‐imaging, and photodynamic therapy). We hope this review will provide valuable guidance for the future development of PerLSs.

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Shortwave Ultraviolet Persistent Luminescence of Sr2MgSi2O7: Pr3+

Cited by 5 publications

References 84 publications

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

Topotactic transformation of gadolinite‐ to melilite‐type structure revisited

Current Developments in Emerging Lanthanide‐Doped Persistent Luminescent Scintillators and Their Applications

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