Pub Date : 2024-09-30DOI: 10.1016/j.jlumin.2024.120921
Jinghua Zhang , Yue Tang , Qichuan Duan , Yaling Wang , Xiaoqiang Tong , Dongliang Tao , Rongbao Liao , Feng Jin , Kun Yin , Deqian Huang , Shangrong Zhang
Two-photon excited fluorescence (TPEF) is widely sought after in bioimaging applications due to its exceptional deep tissue penetration and excellent high spatiotemporal resolution. In this paper, benzothiazole and benzimidazole are linked to N, N-diphenylaniline, respectively, through pyridine vinyl. Two new D-π-A (electron donor-π conjugated bridges-electron acceptor) probes (P1, P2) were designed and synthesized. The molecular structures were completely characterized through FT-IR, 1H NMR, 13C NMR, ESI-MS, and X-ray single crystal diffraction. The probes have good one-photon excited fluorescence and two-photon excited fluorescence. Experimental test results indicate that they can be fluorescence probes for biological imaging of HePG2 and juvenile zebrafish. In addition, the fluorescent probes also have the ability to target and locate cancer cell mitochondria.
双光子激发荧光（TPEF）因其卓越的深层组织穿透性和出色的高时空分辨率而在生物成像应用中广受欢迎。在本文中，苯并噻唑和苯并咪唑通过吡啶基分别与 N，N-二苯基苯胺相连。设计并合成了两种新的 D-π-A（电子供体-π共轭桥-电子受体）探针（P1、P2）。通过傅立叶变换红外光谱（FT-IR）、1H NMR、13C NMR、ESI-MS 和 X 射线单晶衍射对分子结构进行了完整的表征。探针具有良好的单光子激发荧光和双光子激发荧光。实验测试结果表明，这些探针可用于 HePG2 和幼年斑马鱼的生物成像。此外，该荧光探针还具有靶向定位癌细胞线粒体的能力。
{"title":"Small molecule probes with strong one and two-photon excited fluorescence for bioimaging","authors":"Jinghua Zhang , Yue Tang , Qichuan Duan , Yaling Wang , Xiaoqiang Tong , Dongliang Tao , Rongbao Liao , Feng Jin , Kun Yin , Deqian Huang , Shangrong Zhang","doi":"10.1016/j.jlumin.2024.120921","DOIUrl":"10.1016/j.jlumin.2024.120921","url":null,"abstract":"<div><div>Two-photon excited fluorescence (TPEF) is widely sought after in bioimaging applications due to its exceptional deep tissue penetration and excellent high spatiotemporal resolution. In this paper, benzothiazole and benzimidazole are linked to N, N-diphenylaniline, respectively, through pyridine vinyl. Two new D-π-A (electron donor-π conjugated bridges-electron acceptor) probes (P1, P2) were designed and synthesized. The molecular structures were completely characterized through FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, ESI-MS, and X-ray single crystal diffraction. The probes have good one-photon excited fluorescence and two-photon excited fluorescence. Experimental test results indicate that they can be fluorescence probes for biological imaging of HePG2 and juvenile zebrafish. In addition, the fluorescent probes also have the ability to target and locate cancer cell mitochondria.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423420","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 : 2024-09-28DOI: 10.1016/j.jlumin.2024.120899
Reshma J. Pandhare , Sajeev Chacko , Rajesh M. Kamble
A series of eight novel donor‒acceptor (D─A) based 2,3-di(thiophen-2-yl)quinoxaline derivatives 2–9 were prepared by modulating donor species on quinoxaline core with Palladium catalyzed Suzuki–Miyaura ‘C–C bond’ coupling reaction. The synthesized molecules were fully characterized and studied for impact of D–A interaction on opto-electrochemical properties. Absorption spectra of 2–9 display intramolecular charge transfer (ICT) transitions in the range of 388–414 nm. Dyes shows positive solvatochromism and emit in blue‒yellow region with emission maxima 444−550 nm on excitation at their respective ICT maxima in toluene, chloroform, DCM, DMSO and neat solid film. Further, solid state emission was studied for aggregation‒induced emission (AIE) effect in THF–water system due to the nanoparticles formation, as confirmed by FEG‒SEM technique. The HOMO and LUMO energy level for compounds 2–9 were measured by cyclic voltammetry and found in the range of −5.15 to −5.94 eV and −2.81 to −3.39 eV. Theoretical studies of molecules were also carried out by using DFT and TD‒DFT calculations. The comparable HOMO and LUMO energy levels with reported ambipolar materials and efficient solid-state emission make synthesized compounds potential candidate for solid state emissive, ambipolar charge transporting materials in organic electronics.
{"title":"Suzuki-Miyaura coupling reaction: Blue-yellow emitting AIE active dyes for organic electronics","authors":"Reshma J. Pandhare , Sajeev Chacko , Rajesh M. Kamble","doi":"10.1016/j.jlumin.2024.120899","DOIUrl":"10.1016/j.jlumin.2024.120899","url":null,"abstract":"<div><div>A series of eight novel donor‒acceptor (D─A) based 2,3-di(thiophen-2-yl)quinoxaline derivatives <strong>2</strong>–<strong>9</strong> were prepared by modulating donor species on quinoxaline core with Palladium catalyzed Suzuki–Miyaura ‘C–C bond’ coupling reaction. The synthesized molecules were fully characterized and studied for impact of D–A interaction on opto-electrochemical properties. Absorption spectra of <strong>2</strong>–<strong>9</strong> display intramolecular charge transfer (ICT) transitions in the range of 388–414 nm. Dyes shows positive solvatochromism and emit in blue‒yellow region with emission maxima 444−550 nm on excitation at their respective ICT maxima in toluene, chloroform, DCM, DMSO and neat solid film. Further, solid state emission was studied for aggregation‒induced emission (AIE) effect in THF–water system due to the nanoparticles formation, as confirmed by FEG‒SEM technique. The HOMO and LUMO energy level for compounds <strong>2</strong>–<strong>9</strong> were measured by cyclic voltammetry and found in the range of −5.15 to −5.94 eV and −2.81 to −3.39 eV. Theoretical studies of molecules were also carried out by using DFT and TD‒DFT calculations. The comparable HOMO and LUMO energy levels with reported ambipolar materials and efficient solid-state emission make synthesized compounds potential candidate for solid state emissive, ambipolar charge transporting materials in organic electronics.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423544","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 : 2024-09-26DOI: 10.1016/j.jlumin.2024.120915
Wei Yuan , Rongbin Dai , Zheng Zhang , Xiuji Lin , Huiying Xu , Zhiping Cai
In order to study the spectral properties of Ho3+:YLiF4 (Ho3+:YLF), we measured the absorption spectra f Ho3+:YLF crystal. The experimental and calculated electric dipole line strength are calculated based on Judd-Ofelt theory, so do other spectral parameters. In order to characterize the emission characteristics of energy level, we measured the emission spectra of Ho3+:YLF crystal under the pumping of lasers at 450 nm and 640 nm, and the partial emission cross-sections spectra was calculated according to the Fuchtbauer-Ladenburg theory. Moreover, the fluorescence lifetimes of 537 nm, 656 nm, 750 nm, 1195 nm and 1964 nm are measured. As far as we know, the fluorescence lifetime of 1964 nm (∼2 μm) and the emission cross-sections of ∼750 nm and ∼961 nm are confirmed for the first time. This work lays the foundation for the generation of lasing at novel wavelength on Ho3+:YLF crystal.
{"title":"Spectral analysis and emission properties of Ho3+: YLF in the visible-near infrared band","authors":"Wei Yuan , Rongbin Dai , Zheng Zhang , Xiuji Lin , Huiying Xu , Zhiping Cai","doi":"10.1016/j.jlumin.2024.120915","DOIUrl":"10.1016/j.jlumin.2024.120915","url":null,"abstract":"<div><div>In order to study the spectral properties of Ho<sup>3+</sup>:YLiF<sub>4</sub> (Ho<sup>3+</sup>:YLF), we measured the absorption spectra f Ho<sup>3+</sup>:YLF crystal. The experimental and calculated electric dipole line strength are calculated based on Judd-Ofelt theory, so do other spectral parameters. In order to characterize the emission characteristics of energy level, we measured the emission spectra of Ho<sup>3+</sup>:YLF crystal under the pumping of lasers at 450 nm and 640 nm, and the partial emission cross-sections spectra was calculated according to the Fuchtbauer-Ladenburg theory. Moreover, the fluorescence lifetimes of 537 nm, 656 nm, 750 nm, 1195 nm and 1964 nm are measured. As far as we know, the fluorescence lifetime of 1964 nm (∼2 μm) and the emission cross-sections of ∼750 nm and ∼961 nm are confirmed for the first time. This work lays the foundation for the generation of lasing at novel wavelength on Ho<sup>3+</sup>:YLF crystal.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327869","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}
A series of novel red-emitting Sr2EuAlO5 phosphors, both undoped and doped with rare earth elements Sm, Ce and Tb ions were synthesized using a solid-state method. The photoluminescent properties were investigated. For the Sr2EuAlO5 phosphor, the excitation spectra exhibited a broad charge transfer band ranging from 250 to 360 nm and some sharp peaks ranging from 450 to 550 nm, with the highest sharp peak at 463 nm. The emission spectra showed the red emission in both undoped and doped Sr2EuAlO5 phosphors, with the highest peak at 702 nm attributed to 5D0→7F4 transition under different excitation wavelengths of 393 and 463 nm. Doping Tb ions into the host lattice Sr2EuAlO5 resulted in an extraordinary ultra-high luminescence ratio of 5D0−7F4 at 702 nm to 5D0−7F2 at 620 nm, which was approximately three times higher than that of Sr2EuAlO5. Ce-doped Sr2EuAlO5 phosphors altered the shape of excitation spectra and charge transfer phenomenon was observed, while Sm-doped Sr2EuAlO5 significantly enhancing the emission intensity at 702 nm. In this study site preferential occupancy based on bond energy calculations was reported for the first time to theoretically confirm the dopant ion sites. The results indicate that Sm and Tb ions preferentially occupy the Eu1 sites, while Ce ions only occupied the Sr2 positions. The CIE values (x = 0.6311, y = 0.3512) and high color purity of 94.8 % in Sr2EuAlO5: 10 % Sm ions indicate its suitability as a red phosphor for WLEDs.
{"title":"Novel deep-red photoluminescence with extraordinary high luminescence ratio of 5D0−7F4 at 702 nm to 5D0−7F2 at 620 nm in Sr2EuAlO5","authors":"Muhammad Kamran , Chenglong Xia , Syeda Duaa Zahra , Xiao He, Bingyang Zeng, Chunmiao Cui, Jiahui Yang, Xiaoguang Liu, Ling Li","doi":"10.1016/j.jlumin.2024.120913","DOIUrl":"10.1016/j.jlumin.2024.120913","url":null,"abstract":"<div><div>A series of novel red-emitting Sr<sub>2</sub>EuAlO<sub>5</sub> phosphors, both undoped and doped with rare earth elements Sm, Ce and Tb ions were synthesized using a solid-state method. The photoluminescent properties were investigated. For the Sr<sub>2</sub>EuAlO<sub>5</sub> phosphor, the excitation spectra exhibited a broad charge transfer band ranging from 250 to 360 nm and some sharp peaks ranging from 450 to 550 nm, with the highest sharp peak at 463 nm. The emission spectra showed the red emission in both undoped and doped Sr<sub>2</sub>EuAlO<sub>5</sub> phosphors, with the highest peak at 702 nm attributed to <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>4</sub> transition under different excitation wavelengths of 393 and 463 nm. Doping Tb ions into the host lattice Sr<sub>2</sub>EuAlO<sub>5</sub> resulted in an extraordinary ultra-high luminescence ratio of <sup>5</sup>D<sub>0</sub><sup>−7</sup>F<sub>4</sub> at 702 nm to <sup>5</sup>D<sub>0</sub><sup>−7</sup>F<sub>2</sub> at 620 nm, which was approximately three times higher than that of Sr<sub>2</sub>EuAlO<sub>5</sub>. Ce-doped Sr<sub>2</sub>EuAlO<sub>5</sub> phosphors altered the shape of excitation spectra and charge transfer phenomenon was observed, while Sm-doped Sr<sub>2</sub>EuAlO<sub>5</sub> significantly enhancing the emission intensity at 702 nm. In this study site preferential occupancy based on bond energy calculations was reported for the first time to theoretically confirm the dopant ion sites. The results indicate that Sm and Tb ions preferentially occupy the Eu1 sites, while Ce ions only occupied the Sr2 positions. The CIE values (x = 0.6311, y = 0.3512) and high color purity of 94.8 % in Sr<sub>2</sub>EuAlO<sub>5</sub>: 10 % Sm ions indicate its suitability as a red phosphor for WLEDs.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359444","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 : 2024-09-26DOI: 10.1016/j.jlumin.2024.120918
Juanfang Zhou , Zimei Zhang , Meng Li , Yanpeng Lu , Defang Xu , Xingliang Liu
This study devotes to the design, preparation, and examination of two novel D-A structured molecules, designated as CCEDBF and BCCEDBF, which are derived from carbazole unit, dicyanoethylene segment, and dibenzofuran unit. The distinctive D-A molecular architectures and highly twisted spatial configurations of these compounds facilitate pronounced intramolecular charge transfer (ICT) while also imparting robust solid-state luminescence, exhibiting emission efficiencies of 0.518 and 0.739, respectively, and notable aggregation-induced emission (AIE) with AIE factors of 43 and 30. Significantly, both CCEDBF and BCCEDBF demonstrate reversible mechanofluorochromic (MFC) behavior characterized by high fluorescence contrast. Mechanical grinding of the initial powders results in a shift in their emission colors, transitioning from green and yellow-green to yellow and orange-red, respectively, alongside a corresponding shift in emission peaks from 525 nm to 536 nm–558 nm and 597 nm. Powder X-ray diffraction (PXRD) examination of the initially synthesized, mechanically processed, and vaporized samples reveals that the observed fluorescence color change is due to a structural transformation between ordered crystalline and disordered amorphous configurations induced by the application of the external force. The red shift in photoluminescence (PL) spectra post-grinding is attributed to a reduced band gap, driven by factors such as extended π-conjugation length, enhanced planar intramolecular charge transfer (PICT) effect, strengthened π-π interactions and exciton coupling, as well as the increase in the orbitals overlap between neighboring molecular. Moreover, the presence or absence of tert-butyl substituents attaching to the 3- and 6-positions of the carbazole units significantly impacts the photophysical properties of these materials.
{"title":"Design and synthesis of dicyanoethylene derivatives functionalized with carbazole possessing the properties of obvious aggregation-induced emission and reversible high-contrast mechanofluorochromism","authors":"Juanfang Zhou , Zimei Zhang , Meng Li , Yanpeng Lu , Defang Xu , Xingliang Liu","doi":"10.1016/j.jlumin.2024.120918","DOIUrl":"10.1016/j.jlumin.2024.120918","url":null,"abstract":"<div><div>This study devotes to the design, preparation, and examination of two novel D-A structured molecules, designated as <strong>CCEDBF</strong> and <strong>BCCEDBF</strong>, which are derived from carbazole unit, dicyanoethylene segment, and dibenzofuran unit. The distinctive D-A molecular architectures and highly twisted spatial configurations of these compounds facilitate pronounced intramolecular charge transfer (ICT) while also imparting robust solid-state luminescence, exhibiting emission efficiencies of 0.518 and 0.739, respectively, and notable aggregation-induced emission (AIE) with AIE factors of 43 and 30. Significantly, both <strong>CCEDBF</strong> and <strong>BCCEDBF</strong> demonstrate reversible mechanofluorochromic (MFC) behavior characterized by high fluorescence contrast. Mechanical grinding of the initial powders results in a shift in their emission colors, transitioning from green and yellow-green to yellow and orange-red, respectively, alongside a corresponding shift in emission peaks from 525 nm to 536 nm–558 nm and 597 nm. Powder X-ray diffraction (PXRD) examination of the initially synthesized, mechanically processed, and vaporized samples reveals that the observed fluorescence color change is due to a structural transformation between ordered crystalline and disordered amorphous configurations induced by the application of the external force. The red shift in photoluminescence (PL) spectra post-grinding is attributed to a reduced band gap, driven by factors such as extended π-conjugation length, enhanced planar intramolecular charge transfer (PICT) effect, strengthened π-π interactions and exciton coupling, as well as the increase in the orbitals overlap between neighboring molecular. Moreover, the presence or absence of <em>tert</em>-butyl substituents attaching to the 3- and 6-positions of the carbazole units significantly impacts the photophysical properties of these materials.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423548","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}
Novel functional materials that integrate multiple tunable luminescence modes hold significant scientific and application potential. In this study, nanostructure strategies were employed to fabricate a series of microcrystalline glasses doped with rare-earth and transition-metal ions. The crystallization behavior of the nanocrystals (NCs) was revealed through high-resolution transmission electron microscopy (HRTEM), and the photoluminescence spectra of the samples were systematically investigated, demonstrating the achievement of independent and efficient visible light emission. With the further addition of the dopant Mn2+, it can occupy different sites to generate efficient energy transfer for ions, effectively improve the luminous efficiency, and changing the Mn2+ concentration can achieve a wide tunable color gamut. In addition, by exciting the glass samples with different excitation light sources, tunable emission of both red and blue was achieved. The results demonstrated the significant potential of the experimental samples as new multifunctional materials for optical dynamic anti-counterfeiting applications.
{"title":"Controllable multicolored optical glass-ceramics based on nanostructure strategies and dopants","authors":"Junyi Wang, Feifei Huang, Guoqing Jiang, Ruoshan Lei, Denghao Li, Shiqing Xu","doi":"10.1016/j.jlumin.2024.120917","DOIUrl":"10.1016/j.jlumin.2024.120917","url":null,"abstract":"<div><div>Novel functional materials that integrate multiple tunable luminescence modes hold significant scientific and application potential. In this study, nanostructure strategies were employed to fabricate a series of microcrystalline glasses doped with rare-earth and transition-metal ions. The crystallization behavior of the nanocrystals (NCs) was revealed through high-resolution transmission electron microscopy (HRTEM), and the photoluminescence spectra of the samples were systematically investigated, demonstrating the achievement of independent and efficient visible light emission. With the further addition of the dopant Mn<sup>2+</sup>, it can occupy different sites to generate efficient energy transfer for ions, effectively improve the luminous efficiency, and changing the Mn<sup>2+</sup> concentration can achieve a wide tunable color gamut. In addition, by exciting the glass samples with different excitation light sources, tunable emission of both red and blue was achieved. The results demonstrated the significant potential of the experimental samples as new multifunctional materials for optical dynamic anti-counterfeiting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327866","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 structural, morphological, linear, and nonlinear optical properties of Cr2O3 thin films with different thicknesses deposited by the thermal deposition, were measured. The structural and morphological parameters of films, determined by XRD, FESEM, and AFM images, are compared to the linear and nonlinear optical characteristics of these media. The bandgap of prepared thin films was obtained from DRS spectra. The electron effective mass (), linear refractive index (), optical static, and high frequency dielectric constant ( , ) values were calculated by using the band gap energy values. Increasing the thicknesses of thin films causes to decrease the band gap, an increase RMS, increase the size of nanoparticles and the nonlinear responses of thin films. The high magnitude of n2, and β belonged to the Cr2O3 (300 nm-thickness) in the order of 10−5 cm2/W, and 10−1 cm/W respectively. The fluctuations in nonlinear responses observed at different thicknesses are attributed to d-d transitions and intraband scattering of equilibrium electrons influenced by laser radiation, as indicated by the nonlinearity data. The considerably elevated refractive non-linearity values in the analyzed film materials suggest their potential for practical applications in optoelectronic devices.
{"title":"Influence of d-d transition electrons and thickness variations on the excited-state optical properties: Nonlinear optical characterization of Cr2O3 thin film","authors":"Ammar S. Alattar , Marzieh Nadafan , Zahra Dehghani , Morteza Khashehchi","doi":"10.1016/j.jlumin.2024.120916","DOIUrl":"10.1016/j.jlumin.2024.120916","url":null,"abstract":"<div><div>The structural, morphological, linear, and nonlinear optical properties of Cr<sub>2</sub>O<sub>3</sub> thin films with different thicknesses deposited by the thermal deposition, were measured. The structural and morphological parameters of films, determined by XRD, FESEM, and AFM images, are compared to the linear and nonlinear optical characteristics of these media. The bandgap of prepared thin films was obtained from DRS spectra. The electron effective mass (<span><math><mrow><msubsup><mi>m</mi><mi>e</mi><mo>∗</mo></msubsup><mo>/</mo><msub><mi>m</mi><mn>0</mn></msub></mrow></math></span>), linear refractive index (<span><math><mrow><msub><mi>n</mi><mn>0</mn></msub></mrow></math></span>), optical static, and high frequency dielectric constant (<span><math><mrow><msub><mi>ε</mi><mn>0</mn></msub></mrow></math></span> , <span><math><mrow><msub><mi>ε</mi><mi>∞</mi></msub></mrow></math></span>) values were calculated by using the band gap energy values. Increasing the thicknesses of thin films causes to decrease the band gap, an increase RMS, increase the size of nanoparticles and the nonlinear responses of thin films. The high magnitude of n<sub>2</sub>, and β belonged to the Cr<sub>2</sub>O<sub>3</sub> (300 nm-thickness) in the order of 10<sup>−5</sup> cm<sup>2</sup>/W, and 10<sup>−1</sup> cm/W respectively. The fluctuations in nonlinear responses observed at different thicknesses are attributed to d-d transitions and intraband scattering of equilibrium electrons influenced by laser radiation, as indicated by the nonlinearity data. The considerably elevated refractive non-linearity values in the analyzed film materials suggest their potential for practical applications in optoelectronic devices.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359443","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 : 2024-09-24DOI: 10.1016/j.jlumin.2024.120912
Julia Maciejewska-Prończuk , Magdalena Oćwieja , Paulina Żeliszewska , Monika Wasilewska , Ditta Ungor , Edit Csapó , Lilianna Szyk-Warszyńska , Marta Gajewska , Agnieszka Chrzanowska , Joanna Dobrzyńska , Inna Ivashchenko , Katarzyna Matras-Postołek , Zbigniew Adamczyk
Gold nanoclusters suspension were effectively synthesized under alkaline conditions in a chemical reduction process involving gold(III) chloride trihydrate and lysozyme (LYZ) molecules. Their size determined by high-resolution transmission electron microscopy (HR-TEM) was equal to 1.9 ± 0.5 nm. The nanoclusters, referred to as LYZ-Au NCs, were stable at pH below 4 and above 8, exhibiting a hydrodynamic diameter between 8 and 11 nm. The isoelectric point of LYZ-Au NCs appeared at pH 5.0. The suspension showed a pronounced fluorescence characterized by the red-emitting band at 668 nm. The deposition kinetics and stability of LYZ-Au NCs on bare and poly(diallyldimethylammonium chloride) (PDADMAC)-modified silica sensors were studied using quartz crystal microbalance (QCM). The influence of ionic strength, pH, and suspension concentration on the kinetics of LYZ-Au NCs deposition was determined. The significant increase in the maximum coverage of LYZ-Au NCs with ionic strength was attributed to the decreasing range of electrostatic interactions between deposited clusters. Atomic force microscopy (AFM) confirmed the formation of homogeneous layers of LYZ-Au NCs with controlled coverage on bare silica at pH 3.5 and PDADMAC-modified silica. It was shown by confocal microscopy investigations, that these layers also exhibited pronounced fluorescent properties.
{"title":"Fluorescent gold nanoclusters stabilized by lysozyme: Synthesis and deposition kinetics on silica substrates","authors":"Julia Maciejewska-Prończuk , Magdalena Oćwieja , Paulina Żeliszewska , Monika Wasilewska , Ditta Ungor , Edit Csapó , Lilianna Szyk-Warszyńska , Marta Gajewska , Agnieszka Chrzanowska , Joanna Dobrzyńska , Inna Ivashchenko , Katarzyna Matras-Postołek , Zbigniew Adamczyk","doi":"10.1016/j.jlumin.2024.120912","DOIUrl":"10.1016/j.jlumin.2024.120912","url":null,"abstract":"<div><div>Gold nanoclusters suspension were effectively synthesized under alkaline conditions in a chemical reduction process involving gold(III) chloride trihydrate and lysozyme (LYZ) molecules. Their size determined by high-resolution transmission electron microscopy (HR-TEM) was equal to 1.9 ± 0.5 nm. The nanoclusters, referred to as LYZ-Au NCs, were stable at pH below 4 and above 8, exhibiting a hydrodynamic diameter between 8 and 11 nm. The isoelectric point of LYZ-Au NCs appeared at pH 5.0. The suspension showed a pronounced fluorescence characterized by the red-emitting band at 668 nm. The deposition kinetics and stability of LYZ-Au NCs on bare and poly(diallyldimethylammonium chloride) (PDADMAC)-modified silica sensors were studied using quartz crystal microbalance (QCM). The influence of ionic strength, pH, and suspension concentration on the kinetics of LYZ-Au NCs deposition was determined. The significant increase in the maximum coverage of LYZ-Au NCs with ionic strength was attributed to the decreasing range of electrostatic interactions between deposited clusters. Atomic force microscopy (AFM) confirmed the formation of homogeneous layers of LYZ-Au NCs with controlled coverage on bare silica at pH 3.5 and PDADMAC-modified silica. It was shown by confocal microscopy investigations, that these layers also exhibited pronounced fluorescent properties.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.jlumin.2024.120914
Yongqiang Zhou , Lei Huang , Chunping Huang , Mengyue Wu , Weiwei Chen , Yayun Pu , Jun'an Lai , Xiaosheng Tang
Metal halide perovskite materials present a wide array of opportunities for the development of high-performance optoelectronic devices, owing to their outstanding photoelectric properties. Compared with the lead-containing perovskites, stable and non-toxic organic-inorganic hybrid perovskites exhibit enhanced potential for future commercial applications. In this work, we developed a self-powered UV photodetector based on 2D Dion−Jacobson (DJ) phase lead-free double perovskite HAAg0.5Bi0.5Br4 (HA2+ = histammonium) perovskite with an on-off ratio up to 2.66 × 106, excellent specific detectivity of 6 × 1012 Jones, and response speed of 1.32 ms/118.4 μs. The light intensity related pyro-phototronic effect on 2D perovskite is thoroughly investigated. Temperature and light detection are realized through multi-energy coupling, which greatly improves the detection performance. Coupled pyro-phototronic current is calculated nearly 75 folds higher than that from the photoelectronic merely. As-prepared photodetector film shows excellent stability in normal environment, maintaining a value of 90 % to the initial performance after 500 cycles and 90 days. This work provides a new self-powered, stable and non-toxic candidate for the future UV photodetectors.
{"title":"Highly stable and self-powered ultraviolet photodetector based on Dion-Jacobson phase lead-free double perovskite","authors":"Yongqiang Zhou , Lei Huang , Chunping Huang , Mengyue Wu , Weiwei Chen , Yayun Pu , Jun'an Lai , Xiaosheng Tang","doi":"10.1016/j.jlumin.2024.120914","DOIUrl":"10.1016/j.jlumin.2024.120914","url":null,"abstract":"<div><div>Metal halide perovskite materials present a wide array of opportunities for the development of high-performance optoelectronic devices, owing to their outstanding photoelectric properties. Compared with the lead-containing perovskites, stable and non-toxic organic-inorganic hybrid perovskites exhibit enhanced potential for future commercial applications. In this work, we developed a self-powered UV photodetector based on 2D Dion−Jacobson (DJ) phase lead-free double perovskite HAAg<sub>0.5</sub>Bi<sub>0.5</sub>Br<sub>4</sub> (HA<sup>2+</sup> = histammonium) perovskite with an on-off ratio up to 2.66 × 10<sup>6</sup>, excellent specific detectivity of 6 × 10<sup>12</sup> Jones, and response speed of 1.32 ms/118.4 μs. The light intensity related pyro-phototronic effect on 2D perovskite is thoroughly investigated. Temperature and light detection are realized through multi-energy coupling, which greatly improves the detection performance. Coupled pyro-phototronic current is calculated nearly 75 folds higher than that from the photoelectronic merely. As-prepared photodetector film shows excellent stability in normal environment, maintaining a value of 90 % to the initial performance after 500 cycles and 90 days. This work provides a new self-powered, stable and non-toxic candidate for the future UV photodetectors.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423546","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 : 2024-09-24DOI: 10.1016/j.jlumin.2024.120907
Zhong Xu, Yi Shen, Yang Chen, Mengkai Zuo, Feng Hu, Mingchen Deng, Bin Wang, Hao Sun, Wei Huang, Dayu Wu
Room-temperature phosphorescence (RTP) materials have shown widespread applications in optoelectronic devices, biological imaging, molecular switches, safety systems, etc. Here, we report the design and synthesis of a series of metal‒organic halide materials with regulated phosphorescence and fluorescence dual emission properties. Their dual emission ratio and RTP lifetime can be facilely tuned by the halide substituent synthesis. Bright afterglow with various emission duration for the investigated materials can be identified by the naked eyes. DFT calculations reveal that the excited states exhibit halide‒ligand charge transfer (XLCT) character and the halide atoms play crucial role in their luminescence properties. Based on their regulatable dual emission and afterglow properties, a time-resolved anti-counterfeiting application is developed and avoids the over-dependence on equipment, which further provides feasible design strategy of advanced portable anti-counterfeiting technology.
{"title":"Halide modulated room-temperature phosphorescence from one-dimensional metal‒organic halides for time-resolved anti-counterfeiting","authors":"Zhong Xu, Yi Shen, Yang Chen, Mengkai Zuo, Feng Hu, Mingchen Deng, Bin Wang, Hao Sun, Wei Huang, Dayu Wu","doi":"10.1016/j.jlumin.2024.120907","DOIUrl":"10.1016/j.jlumin.2024.120907","url":null,"abstract":"<div><div>Room-temperature phosphorescence (RTP) materials have shown widespread applications in optoelectronic devices, biological imaging, molecular switches, safety systems, etc. Here, we report the design and synthesis of a series of metal‒organic halide materials with regulated phosphorescence and fluorescence dual emission properties. Their dual emission ratio and RTP lifetime can be facilely tuned by the halide substituent synthesis. Bright afterglow with various emission duration for the investigated materials can be identified by the naked eyes. DFT calculations reveal that the excited states exhibit halide‒ligand charge transfer (XLCT) character and the halide atoms play crucial role in their luminescence properties. Based on their regulatable dual emission and afterglow properties, a time-resolved anti-counterfeiting application is developed and avoids the over-dependence on equipment, which further provides feasible design strategy of advanced portable anti-counterfeiting technology.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314575","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}
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