Pub Date : 2026-04-01Epub Date: 2026-01-07DOI: 10.1016/j.jlumin.2026.121752
Dejian Hou , Jianhong Dong , Rui Huang , Huihong Lin , Shaomin Lin , Yi Zhang , Zhenxu Lin , Huan Yang , Hailong Liu , Jinyan Li
Multiple-emission phosphors, which can be engineered via co-doping strategies and energy transfer regulation, have become a research hotspot in recent years. In this research, Mn2+ and Cr3+ doped Sr2MgAl22O36 phosphors were prepared using a high-temperature solid-state reaction method. The green light emission of Mn2+ and the deep-red emission of Cr3+ were investigated, and the impacts of doping concentration and temperature were discussed in detail. Dual-band emission can be achieved for co-doped samples under blue light excitation, and the energy transfer from Mn2+ to Cr3+ was confirmed. Owing to the distinct temperature responses of Mn2+ and Cr3+, optical temperature sensing properties were demonstrated for the co-doped sample, which may offer a feasible approach for non-contact temperature measurement. Moreover, a triple-emission phosphor-converted light-emitting diode (pc-LED) device was fabricated, highlighting the potential application of Sr2MgAl22O36:Mn2+,Cr3+ in plant growth.
{"title":"Luminescence properties, energy transfer, and potential applications of Sr2MgAl22O36:Mn2+,Cr3+ phosphor","authors":"Dejian Hou , Jianhong Dong , Rui Huang , Huihong Lin , Shaomin Lin , Yi Zhang , Zhenxu Lin , Huan Yang , Hailong Liu , Jinyan Li","doi":"10.1016/j.jlumin.2026.121752","DOIUrl":"10.1016/j.jlumin.2026.121752","url":null,"abstract":"<div><div>Multiple-emission phosphors, which can be engineered via co-doping strategies and energy transfer regulation, have become a research hotspot in recent years. In this research, Mn<sup>2+</sup> and Cr<sup>3+</sup> doped Sr<sub>2</sub>MgAl<sub>22</sub>O<sub>36</sub> phosphors were prepared using a high-temperature solid-state reaction method. The green light emission of Mn<sup>2+</sup> and the deep-red emission of Cr<sup>3+</sup> were investigated, and the impacts of doping concentration and temperature were discussed in detail. Dual-band emission can be achieved for co-doped samples under blue light excitation, and the energy transfer from Mn<sup>2+</sup> to Cr<sup>3+</sup> was confirmed. Owing to the distinct temperature responses of Mn<sup>2+</sup> and Cr<sup>3+</sup>, optical temperature sensing properties were demonstrated for the co-doped sample, which may offer a feasible approach for non-contact temperature measurement. Moreover, a triple-emission phosphor-converted light-emitting diode (pc-LED) device was fabricated, highlighting the potential application of Sr<sub>2</sub>MgAl<sub>22</sub>O<sub>36</sub>:Mn<sup>2+</sup>,Cr<sup>3+</sup> in plant growth.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121752"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Multi-phonon-assisted energy relaxation is demonstrated as an effect improving properties of laser media. For the first time, luminescence properties enhancement of germanosilicate bismuth-doped optical active fiber with boron is suggested. Lifetime of luminescence, quantum yield and branching ratio of bismuth active center associated with Si atom (BAC-Si) in Bi-doped germanosilicate fibers were investigated from perspective of their perfection by addition of different boron molar fraction in a fiber core. The most appropriate molar fraction of boron content for optimization of laser characteristics of a germanosilicate bismuth-doped active fiber was evaluated. Einstein coefficients and multi-phonon decay rates of electron transitions in BAC-Si were derived for co-doped with various concentration of boron and bismuth germanosilicate fibers.
{"title":"Phonon-assisted energy relaxation between laser levels of Bi active center associated with Si atom","authors":"A.V. Elopov , K.E. Riumkin , D.S. Serenkov , M.V. Yashkov , A.N. Abramov , A.S. Lobanov , D.F. Burmistrov , S.V. Firstov , M.A. Melkumov","doi":"10.1016/j.jlumin.2026.121744","DOIUrl":"10.1016/j.jlumin.2026.121744","url":null,"abstract":"<div><div>Multi-phonon-assisted energy relaxation is demonstrated as an effect improving properties of laser media. For the first time, luminescence properties enhancement of germanosilicate bismuth-doped optical active fiber with boron is suggested. Lifetime of luminescence, quantum yield and branching ratio of bismuth active center associated with Si atom (BAC-Si) in Bi-doped germanosilicate fibers were investigated from perspective of their perfection by addition of different boron molar fraction in a fiber core. The most appropriate molar fraction of boron content for optimization of laser characteristics of a germanosilicate bismuth-doped active fiber was evaluated. Einstein coefficients and multi-phonon decay rates of electron transitions in BAC-Si were derived for co-doped with various concentration of boron and bismuth germanosilicate fibers.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121744"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2025-12-30DOI: 10.1016/j.jlumin.2025.121727
Javier Fernández-Martínez , Nikolaos Kyvelos , Herko P. van der Meulen , Guillermo López-Polín , David Hernández-Pinilla , Pablo Ares , Christos Tserkezis , Mariola O. Ramírez , Luisa E. Bausá
Two-dimensional transition metal dichalcogenides host strongly bound excitonic quasiparticles whose optical response can be tailored by external perturbations. Strain gradients, in particular, provide a powerful route to control exciton-to-trion conversion with nanometric precision, opening opportunities for excitonic circuitry. Here, we probe nanometrically localized strain fields in monolayer MoS2 transferred onto a linear chain of Ag nanoparticles on LiNbO3 substrates. The nanoparticle chain induces one-dimensional nanoscale strain gradients in the monolayer while its plasmonic resonance remains spectrally detuned from the MoS2 excitonic transitions, ensuring that the observed response arises purely from strain-induced effects. Room temperature spatially resolved photoluminescence shows strain-driven modifications of the excitonic response, consistent with the predicted strain distribution. However, at cryogenic temperatures, the trion-to-exciton emission ratio increases significantly, by around an order of magnitude, near the Ag nanoparticle chain. This indicates a highly efficient, nanometrically localized exciton-to-trion conversion mainly driven by the enhanced strain gradients and the increased funneling efficiency at cryogenic temperatures, where the relative role of drift, and hence funneling efficiency, increases. The results provide direct experimental evidence of the effects of nanoscale, strain-driven trion manipulation at low temperature, achieved without the need for electric gates or advanced lithographic patterning, and underscores nanometer-wide wrinkles formed by the nanoparticle chain as a scalable and versatile strain-engineered platform for reconfigurable excitonic devices and quantum optoelectronics.
{"title":"Enhanced exciton-to-trion conversion in monolayer MoS2 via nanometrically localized strain at cryogenic temperature","authors":"Javier Fernández-Martínez , Nikolaos Kyvelos , Herko P. van der Meulen , Guillermo López-Polín , David Hernández-Pinilla , Pablo Ares , Christos Tserkezis , Mariola O. Ramírez , Luisa E. Bausá","doi":"10.1016/j.jlumin.2025.121727","DOIUrl":"10.1016/j.jlumin.2025.121727","url":null,"abstract":"<div><div>Two-dimensional transition metal dichalcogenides host strongly bound excitonic quasiparticles whose optical response can be tailored by external perturbations. Strain gradients, in particular, provide a powerful route to control exciton-to-trion conversion with nanometric precision, opening opportunities for excitonic circuitry. Here, we probe nanometrically localized strain fields in monolayer MoS<sub>2</sub> transferred onto a linear chain of Ag nanoparticles on LiNbO<sub>3</sub> substrates. The nanoparticle chain induces one-dimensional nanoscale strain gradients in the monolayer while its plasmonic resonance remains spectrally detuned from the MoS<sub>2</sub> excitonic transitions, ensuring that the observed response arises purely from strain-induced effects. Room temperature spatially resolved photoluminescence shows strain-driven modifications of the excitonic response, consistent with the predicted strain distribution. However, at cryogenic temperatures, the trion-to-exciton emission ratio increases significantly, by around an order of magnitude, near the Ag nanoparticle chain. This indicates a highly efficient, nanometrically localized exciton-to-trion conversion mainly driven by the enhanced strain gradients and the increased funneling efficiency at cryogenic temperatures, where the relative role of drift, and hence funneling efficiency, increases. The results provide direct experimental evidence of the effects of nanoscale, strain-driven trion manipulation at low temperature, achieved without the need for electric gates or advanced lithographic patterning, and underscores nanometer-wide wrinkles formed by the nanoparticle chain as a scalable and versatile strain-engineered platform for reconfigurable excitonic devices and quantum optoelectronics.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121727"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The synthesis of carbon dots via a green route using natural precursor exhibits unique properties, making them a promising candidate for various applications. In this work, we utilized hill galgal juice for synthesizing carbon dots using a cost-effective one-step hydrothermal-assisted green method. We examined the crystal phase and optical properties of the synthesized sample using various techniques, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy, UV–Vis spectroscopy, and photoluminescence spectroscopy. The resulting carbon dots exhibited an increased interlayer spacing of about 4.02 Å and a wide optical bandgap of ∼3.2 eV, which can be attributed to the oxygen-containing groups bonded to their surfaces. Interestingly, it was found that when subjected to ultraviolet light, the carbon dots exhibited strong, bright bluish-green fluorescence and exhibited high photoluminescence. Additionally, we fabricated an ultraviolet sensor at room temperature using the as-synthesized sample, achieving a sensing response of 9 % without employing any complex steps. Moreover, the quantum yield of synthesized carbon dots was found to be 22 %.
{"title":"Eco-friendly carbon dots synthesized from galgal juice for ultraviolet detection","authors":"Srijan Pushkarna , Jyoti Prakash , Kapil Sood , Praveen Malik , Mamta Shandilya , Shivani Dhall","doi":"10.1016/j.jlumin.2025.121730","DOIUrl":"10.1016/j.jlumin.2025.121730","url":null,"abstract":"<div><div>The synthesis of carbon dots via a green route using natural precursor exhibits unique properties, making them a promising candidate for various applications. In this work, we utilized hill galgal juice for synthesizing carbon dots using a cost-effective one-step hydrothermal-assisted green method. We examined the crystal phase and optical properties of the synthesized sample using various techniques, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy, UV–Vis spectroscopy, and photoluminescence spectroscopy. The resulting carbon dots exhibited an increased interlayer spacing of about 4.02 Å and a wide optical bandgap of ∼3.2 eV, which can be attributed to the oxygen-containing groups bonded to their surfaces. Interestingly, it was found that when subjected to ultraviolet light, the carbon dots exhibited strong, bright bluish-green fluorescence and exhibited high photoluminescence. Additionally, we fabricated an ultraviolet sensor at room temperature using the as-synthesized sample, achieving a sensing response of 9 % without employing any complex steps. Moreover, the quantum yield of synthesized carbon dots was found to be 22 %.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121730"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-12DOI: 10.1016/j.jlumin.2026.121755
Wanjia Wang , Lixia Jing , Yanqing Zu , Kangmin Yang , Run Gan , Yue Peng , Decui Gong , Peitao Liu , Xiaodong Li , Zhaoxin Wu , Ailing Feng
Metal halide perovskite quantum dots (PQDs) have emerged as promising emissive materials for next-generation light-emitting diodes due to their exceptional properties, including high luminescence efficiency, facile spectral tunability, high colour purity and cost-effective solution processability. The organic ligands such as long-chain alkyl acids and amines are traditionally used in the synthesis of PQDs, which enable to effectively passivate the surface defects and maintain the colloidal stability. However, these insulating long-chain ligands will hinder the charge transport within PQDs films and weaken the performance of perovskite quantum dots light-emitting diodes (PeQLEDs). In this review, some highly conductive reagent like conjugated or short-chain organic ligands, inorganic and hybrid ligands that enhance the efficiency of PeQLEDs were summarized. Finally, current challenges and future perspectives of PQDs are outlined, emphasizing the potential of advanced ligand design in achieving high-performance optoelectronic devices.
{"title":"Highly conductive ligands resurfacing perovskite quantum dots boost the efficiency of light-emitting diodes","authors":"Wanjia Wang , Lixia Jing , Yanqing Zu , Kangmin Yang , Run Gan , Yue Peng , Decui Gong , Peitao Liu , Xiaodong Li , Zhaoxin Wu , Ailing Feng","doi":"10.1016/j.jlumin.2026.121755","DOIUrl":"10.1016/j.jlumin.2026.121755","url":null,"abstract":"<div><div>Metal halide perovskite quantum dots (PQDs) have emerged as promising emissive materials for next-generation light-emitting diodes due to their exceptional properties, including high luminescence efficiency, facile spectral tunability, high colour purity and cost-effective solution processability. The organic ligands such as long-chain alkyl acids and amines are traditionally used in the synthesis of PQDs, which enable to effectively passivate the surface defects and maintain the colloidal stability. However, these insulating long-chain ligands will hinder the charge transport within PQDs films and weaken the performance of perovskite quantum dots light-emitting diodes (PeQLEDs). In this review, some highly conductive reagent like conjugated or short-chain organic ligands, inorganic and hybrid ligands that enhance the efficiency of PeQLEDs were summarized. Finally, current challenges and future perspectives of PQDs are outlined, emphasizing the potential of advanced ligand design in achieving high-performance optoelectronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121755"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-08DOI: 10.1016/j.jlumin.2026.121753
Jiarong Zhao , Yuan-Hao Zhu , Lin Zhang , Rongqiao Wan , Zhaozhen Wang , Qimiao Chen , Shaoteng Wu , Chuan Seng Tan , Jun-Wei Luo
The Ge1-xSnx alloy is a promising candidate for silicon-based optoelectronic devices, yet few experimental studies have investigated its full indirect-to-direct bandgap transition behavior. The photoluminescence (PL) characteristics of Ge1-xSnx films with Sn compositions of 3.3 %, 6.5 %, 10.3 %, and 12.8 % were investigated by a high-resolution and wide spectrum (1∼5.5 μm) Fourier Transform Infrared Spectrometer PL system. Owing to the wide spectrum measurement capability, the PL spectra of these Ge1-xSnx films can be compared in a single system. It can be seen that the PL spectrum of the high-Sn content GeSn film (12.8 %) exhibits a high-energy shoulder peak, which is different from the low-Sn content GeSn film (3.3 %) with a low-energy shoulder peak. By extracting the transition peak position through Gaussian fitting, we observed for the first time that the direct bandgap energy of the high-Sn content GeSn is lower than the indirect bandgap energy, resulting in the negative energy separation. Furthermore, as the Sn content increases, a clear indirect-to-direct transition is observed, which leads to opposite temperature-dependent PL-intensity trends between the high- and low-component GeSn films. Finally, the insensitivity to temperature was demonstrated in GeSn with Sn compositions of 6.5 %, indicating a balance between radiative and non-radiative recombination. These findings provide further evidence of - and -valley inversion and quasi-direct bandgap GeSn materials, indicating great potential for direct bandgap GeSn and GeSn based optoelectronic devices grown on Si.
{"title":"Systematic investigation of photoluminescence characteristics in GeSn films with varied Sn content by high-resolution and wide-spectrum system","authors":"Jiarong Zhao , Yuan-Hao Zhu , Lin Zhang , Rongqiao Wan , Zhaozhen Wang , Qimiao Chen , Shaoteng Wu , Chuan Seng Tan , Jun-Wei Luo","doi":"10.1016/j.jlumin.2026.121753","DOIUrl":"10.1016/j.jlumin.2026.121753","url":null,"abstract":"<div><div>The Ge<sub>1-x</sub>Sn<sub>x</sub> alloy is a promising candidate for silicon-based optoelectronic devices, yet few experimental studies have investigated its full indirect-to-direct bandgap transition behavior. The photoluminescence (PL) characteristics of Ge<sub>1-x</sub>Sn<sub>x</sub> films with Sn compositions of 3.3 %, 6.5 %, 10.3 %, and 12.8 % were investigated by a high-resolution and wide spectrum (1∼5.5 μm) Fourier Transform Infrared Spectrometer PL system. Owing to the wide spectrum measurement capability, the PL spectra of these Ge<sub>1-x</sub>Sn<sub>x</sub> films can be compared in a single system. It can be seen that the PL spectrum of the high-Sn content GeSn film (12.8 %) exhibits a high-energy shoulder peak, which is different from the low-Sn content GeSn film (3.3 %) with a low-energy shoulder peak. By extracting the transition peak position through Gaussian fitting, we observed for the first time that the direct bandgap energy of the high-Sn content GeSn is lower than the indirect bandgap energy, resulting in the negative energy separation. Furthermore, as the Sn content increases, a clear indirect-to-direct transition is observed, which leads to opposite temperature-dependent PL-intensity trends between the high- and low-component GeSn films. Finally, the insensitivity to temperature was demonstrated in GeSn with Sn compositions of 6.5 %, indicating a balance between radiative and non-radiative recombination. These findings provide further evidence of <span><math><mrow><mi>Γ</mi></mrow></math></span>- and <span><math><mrow><mi>L</mi></mrow></math></span>-valley inversion and quasi-direct bandgap GeSn materials, indicating great potential for direct bandgap GeSn and GeSn based optoelectronic devices grown on Si.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121753"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Tb: 24BaO-4Y2O3-72B2O3 (BYB) glasses containing 0.1–10 mol% Tb were successfully prepared by the melt-quenching technique. The photoluminescence (PL) and thermally stimulated luminescence (TSL) properties were systematically investigated. In the PL and TSL spectra, Tb: BYB glasses exhibited emission bands attributable to the 4f-4f transitions of Tb3+ ions. The lowest detectable dose, estimated from the TSL dose response function of the 5 mol% Tb: BYB glass, was 0.1 mGy. Furthermore, the 5 mol% Tb: BYB glass achieved a spatial resolution of 8.00 LP/mm under X-ray irradiation at a dose of 3 Gy.
{"title":"Photoluminescence and thermally stimulated luminescence properties of Tb-doped 24BaO-4Y2O3-72B2O3 glasses","authors":"Haruaki Ezawa, Keita Miyajima, Akihiro Nishikawa, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida","doi":"10.1016/j.jlumin.2025.121724","DOIUrl":"10.1016/j.jlumin.2025.121724","url":null,"abstract":"<div><div>The Tb: 24BaO-4Y<sub>2</sub>O<sub>3</sub>-72B<sub>2</sub>O<sub>3</sub> (BYB) glasses containing 0.1–10 mol% Tb were successfully prepared by the melt-quenching technique. The photoluminescence (PL) and thermally stimulated luminescence (TSL) properties were systematically investigated. In the PL and TSL spectra, Tb: BYB glasses exhibited emission bands attributable to the 4f-4f transitions of Tb<sup>3+</sup> ions. The lowest detectable dose, estimated from the TSL dose response function of the 5 mol% Tb: BYB glass, was 0.1 mGy. Furthermore, the 5 mol% Tb: BYB glass achieved a spatial resolution of 8.00 LP/mm under X-ray irradiation at a dose of 3 Gy.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121724"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-07DOI: 10.1016/j.jlumin.2025.121694
Lauany Mazzon Pontes , João Vitor Gonçalves de Faria , Julia Santana Reinaldi , Patrícia Paula Araújo Magrin , Natalia Nascimento Silveira , Raquel Alves dos Santos , Lucas Alonso Rocha , Marc Verelst , Eduardo José Nassar
Calcium phosphates (CPs) have been widely used in biomedical applications due to their excellent biocompatibility, crystalline structure, and low toxicity. These characteristics allow structural modifications during synthesis, such as substitution with lanthanide ions, which confer luminescent properties to the matrix. In this study, a CP matrix was synthesized from phosphoric acid and calcium nitrate, with partial substitution of calcium ions by the lanthanide ions erbium (Er3+) and ytterbium (Yb3+) at 1 % and 10 % concentrations, respectively. Characterization by X-ray diffraction revealed a mixture of CP phases. Vibrational spectroscopy in the infrared region identified characteristic matrix bands. Photoluminescence analysis showed bands attributed to Er3+ in the visible and infrared regions. In upconversion energy analyses, using 980 nm laser excitation with power variation between 490 and 1000 mW, more intense emissions were observed in the green region. The increase in power suggested possible thermal excitation of electrons. In temperature variation experiments (25–100 °C), the material demonstrated and confirmed significant thermal sensitivity, indicating potential for application in optical temperature sensing. Cytotoxicity assays indicated no impairment of cell viability at any of the tested concentrations, with behavior similar to the negative control at 24, 48, and 72 h.
{"title":"Luminescent properties OF Er3+ and Yb3+ IONS IN a calcium phosphate matrix","authors":"Lauany Mazzon Pontes , João Vitor Gonçalves de Faria , Julia Santana Reinaldi , Patrícia Paula Araújo Magrin , Natalia Nascimento Silveira , Raquel Alves dos Santos , Lucas Alonso Rocha , Marc Verelst , Eduardo José Nassar","doi":"10.1016/j.jlumin.2025.121694","DOIUrl":"10.1016/j.jlumin.2025.121694","url":null,"abstract":"<div><div>Calcium phosphates (CPs) have been widely used in biomedical applications due to their excellent biocompatibility, crystalline structure, and low toxicity. These characteristics allow structural modifications during synthesis, such as substitution with lanthanide ions, which confer luminescent properties to the matrix. In this study, a CP matrix was synthesized from phosphoric acid and calcium nitrate, with partial substitution of calcium ions by the lanthanide ions erbium (Er<sup>3+</sup>) and ytterbium (Yb<sup>3+</sup>) at 1 % and 10 % concentrations, respectively. Characterization by X-ray diffraction revealed a mixture of CP phases. Vibrational spectroscopy in the infrared region identified characteristic matrix bands. Photoluminescence analysis showed bands attributed to Er<sup>3+</sup> in the visible and infrared regions. In upconversion energy analyses, using 980 nm laser excitation with power variation between 490 and 1000 mW, more intense emissions were observed in the green region. The increase in power suggested possible thermal excitation of electrons. In temperature variation experiments (25–100 °C), the material demonstrated and confirmed significant thermal sensitivity, indicating potential for application in optical temperature sensing. Cytotoxicity assays indicated no impairment of cell viability at any of the tested concentrations, with behavior similar to the negative control at 24, 48, and 72 h.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121694"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-05DOI: 10.1016/j.jlumin.2026.121749
Shuba Paul , Riya Ghanti , Arnab Chakrabarty , Chandan Das , Siddik Sarkar , Sanchita Goswami
The Schiff base probe, 2-Benzothiazol-2-yl-6-[(1-benzyl-piperidin-4-ylimino)-methyl]-4-methylphenol (HBTAP) was constructed by reacting 3-benzothiazolyl-5- methylsalicylaldehyde and 4-amino-1-benzylpiperidine in methanol medium. The resultant probe is characterized by various spectroscopic techniques such as 1H & 13C NMR, ESI-MS, IR and SC-XRD. The fluorescence intensity of the HBTAP solution increases significantly in the presence of only aluminium ion at λmax = 545 nm among other metal ions. Jobs plot and ESI-MS spectrum support a 2:1 binding ratio with Al3+ in ACN-HEPES (8:2, v/v pH = 7.2). The value of limit of detection and binding constant for Al3+ with HBTAP were found to be 66 nM and 8.82 × 103 M−2 respectively. The pronounced increase of yellowish green fluorescence can be referred to as Chelation-enhanced fluorescence (CHEF), established by fluorescence time resolved measurement. Solid state fluorescence study reveals that ESIPT occurs at imine nitrogen side of 4-amino-1-benzylpiperidine part. Ground state optimization and energy calculation of HOMO-LUMO is done by DFT study to confirm the binding mechanism. Additionally, HBTAP can be used successfully to monitor the sensing ability of the probe HBTAP towards Al3+ in MDAMB-231 human cancer cell line.
{"title":"Restriction of photoinduced proton transfer by complexation in dual channel ESIPT active molecule: Fluorimetric Al3+ sensor and live cell imaging","authors":"Shuba Paul , Riya Ghanti , Arnab Chakrabarty , Chandan Das , Siddik Sarkar , Sanchita Goswami","doi":"10.1016/j.jlumin.2026.121749","DOIUrl":"10.1016/j.jlumin.2026.121749","url":null,"abstract":"<div><div>The Schiff base probe, 2-Benzothiazol-2-yl-6-[(1-benzyl-piperidin-4-ylimino)-methyl]-4-methylphenol (<strong>HBTAP</strong>) was constructed by reacting 3-benzothiazolyl-5- methylsalicylaldehyde and 4-amino-1-benzylpiperidine in methanol medium. The resultant probe is characterized by various spectroscopic techniques such as <sup>1</sup>H & <sup>13</sup>C NMR, ESI-MS, IR and SC-XRD. The fluorescence intensity of the <strong>HBTAP</strong> solution increases significantly in the presence of only aluminium ion at <em>λ</em><sub>max</sub> = 545 nm among other metal ions. Jobs plot and ESI-MS spectrum support a 2:1 binding ratio with Al<sup>3+</sup> in ACN-HEPES (8:2, v/v pH = 7.2). The value of limit of detection and binding constant for Al<sup>3+</sup> with <strong>HBTAP</strong> were found to be 66 nM and 8.82 × 10<sup>3</sup> M<sup>−2</sup> respectively. The pronounced increase of yellowish green fluorescence can be referred to as Chelation-enhanced fluorescence (CHEF), established by fluorescence time resolved measurement. Solid state fluorescence study reveals that ESIPT occurs at imine nitrogen side of 4-amino-1-benzylpiperidine part. Ground state optimization and energy calculation of HOMO-LUMO is done by DFT study to confirm the binding mechanism. Additionally, <strong>HBTAP</strong> can be used successfully to monitor the sensing ability of the probe <strong>HBTAP</strong> towards Al<sup>3+</sup> in MDAMB-231 human cancer cell line.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121749"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-03DOI: 10.1016/j.jlumin.2026.121736
Yuhong Xie , Yiying Wang , Yourong Zhao , Jiali Yang , Yangchun Fan , Hongda Li , Daojiang Gao , Zhanglei Ning
In this study, a dual-emission ratiometric fluorescent materials, rhodamine B-functionalized terbium-based metal-organic frameworks (RhB@Tb-MOFs), were synthesized through an ultrasonic immersion approach. The resulting RhB@Tb-MOFs demonstrate a distinct red-green dual emission, generating an easily distinguishable orange-red luminescence with excellent stability across a wide pH range and aqueous environments. This novel probe demonstrates excellent selectivity along with outstanding anti-interference capability, achieving a detection limit as low as 0.219 μM for S2−. Moreover, the sensing mechanism was studied in detail, which is attributed to a dynamic quenching mechanism. This study highlights a versatile and generalizable approach for enhancing luminescence-based sensing performance through the encapsulation of fluorescent dyes in Ln-MOFs, presenting significant potential for environmental monitoring and bioanalytical applications.
{"title":"Electrostatic self-assembled rhodamine B functionalized terbium-based MOFs for highly sensitive detection of sulfide ions","authors":"Yuhong Xie , Yiying Wang , Yourong Zhao , Jiali Yang , Yangchun Fan , Hongda Li , Daojiang Gao , Zhanglei Ning","doi":"10.1016/j.jlumin.2026.121736","DOIUrl":"10.1016/j.jlumin.2026.121736","url":null,"abstract":"<div><div>In this study, a dual-emission ratiometric fluorescent materials, rhodamine B-functionalized terbium-based metal-organic frameworks (RhB@Tb-MOFs), were synthesized through an ultrasonic immersion approach. The resulting RhB@Tb-MOFs demonstrate a distinct red-green dual emission, generating an easily distinguishable orange-red luminescence with excellent stability across a wide pH range and aqueous environments. This novel probe demonstrates excellent selectivity along with outstanding anti-interference capability, achieving a detection limit as low as 0.219 μM for S<sup>2−</sup>. Moreover, the sensing mechanism was studied in detail, which is attributed to a dynamic quenching mechanism. This study highlights a versatile and generalizable approach for enhancing luminescence-based sensing performance through the encapsulation of fluorescent dyes in Ln-MOFs, presenting significant potential for environmental monitoring and bioanalytical applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"292 ","pages":"Article 121736"},"PeriodicalIF":3.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号