Journal of Fluorescence最新文献

{"title":"Influence of Morphology on Luminescent and Structural Properties of Eu³⁺-Doped Hydroxyapatite Powders Sintered by Spark Plasma Sintering.","authors":"Aristeo Garrido Hernández, Joan Reyes Miranda, Sebastián Diaz De La Torre, Giovanni García Domínguez","doi":"10.1007/s10895-025-04538-x","DOIUrl":"https://doi.org/10.1007/s10895-025-04538-x","url":null,"abstract":"<p><p>This study investigates the microstructure, phase stability, hardness, and luminescent properties of europium-doped hydroxyapatite (HA: Eu) powders synthesized via the hydrothermal method and sintered by spark plasma sintering (SPS) at 900 °C. The morphology of the powders was controlled using different glycerol concentrations, yielding plate-like (L/D = 2.09), rod-like (L/D = 1.61), and elongated spherical morphologies. X-ray diffraction confirmed the retention of the hexagonal HA phase after sintering, with crystallite sizes ranging from 47.5 nm to 75.5 nm. The densification of sintered samples reached up to 96.45%, with HA3S (plate-like morphology) achieving the highest value. Photoluminescence analysis revealed characteristic emission peaks of Eu³⁺ at 574-631 nm under 394 nm excitation, with a migration fraction from Ca²⁺(I) to Ca²⁺(II) of 67% for the smallest particle size. Mechanical testing showed that the microhardness varied significantly with porosity and morphology, with HA3S reaching a maximum hardness of 5.67 GPa, compared to 2.1 GPa for HA1S. These results highlight the importance of morphological control in tailoring the optical and mechanical properties of Eu³⁺-doped HA for biomedical applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Excellent Photophysical Properties of an Asymmetric B-N-O Doped Bright Blue Fluorescent Dye with Strong Acid Resistance.","authors":"Lei Zhao, Feng Jin","doi":"10.1007/s10895-025-04556-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04556-9","url":null,"abstract":"<p><p>Through a series of classical reactions, the organic fluorescent molecule with 15-(5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)-10-phenyl-10,15-dihydrobenzofuro[3,2-a]indolo[3,2-c]carbazole (DPDC) as electron acceptor and carbazole group as electron donor was reproduced. Then the optical properties of DPDC in CH₃SO₃H、HCL、H₂SO₄、HNO₃ and other strongly acidic solutions were mainly discussed. The UV absorption shows that the absorption band near ~ 373 nm is mainly attributed to the structural strong absorption band of the n-π* electronic transition of the carbazole part and its adjacent conjugated molecule, and the addition of acidic solution has essentially no effect on the UV absorption of DPDC. The results of fluorescence test manifest that DPDC can still maintain excellent fluorescence emission and fluorescence stability under acidic conditions. Transmission electron microscopy results show that the addition of acidic solution changes DPDC from irregular clusters to uniform spheres. The highest occupied molecular orbital (HOMOs, EHOMO=-5.0012 eV) and the lowest unoccupied molecular orbital (LUMOs, ELUMO = 1.8096 eV) energy levels, band gap (∆ E = 3.1916 eV) and crystal configuration results further confirm the electrochemical and structural stability of DPDC. These data indicate that DPDC is expected to be a potential material for stable acid-resistant organic luminescent materials, which explores the possibility of DPDC for more applications, such as being applied to material surfaces as acid-resistant dyes.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photophysical and Optical Properties of β-keto Carboxylate Tb(III) Complexes with Heterocyclic Sensitizers.","authors":"Shagun Goyat, Vaishnavi Lather, Aarti Khatkar, Pratibha Ahlawat, Poonam Kumari, Bhawna Rathee, Rajesh Kumar","doi":"10.1007/s10895-025-04542-1","DOIUrl":"https://doi.org/10.1007/s10895-025-04542-1","url":null,"abstract":"<p><p>Octa-coordinated terbium complexes containing β-ketocarboxylic acid (L) as main ligand and 1,10-phenanthroline, neocuproine, 2,2-bipyridyl and 2,2-biquinoline as auxiliary ligands have been extensively explored for their optical and photoluminescent properties. Spectroscopic investigations IR and NMR verify that Tb(III) binds to ligand with O-atom and the auxiliary moiety through N-atom. XRD data reveal sharp peaks, indicating the crystalline nature of complexes. The photoluminescence emission spectra for all complexes exhibit a distinct peak at 546 nm, attributed to the ⁵D₄→⁷F₅ transition, which is responsible for green luminescence on exposure to UV light. Additionally, Commission Internationale de l'Éclairage (CIE) color coordinates indicate that synthesized complexes exhibit a green luminous nature. All complexes demonstrated good color purity values. Green luminescence and high thermal stability (210 ℃) of these complexes could be beneficial for developing effective light conversion devices for display and lighting systems. The J-O parameter (Ω₂, Ω₄, Ω₆) and intensity ratio were also calculated to ascertain the coordination environment around the metal ion. Furthermore, we explored the potential application of these complexes in forensic science for latent fingerprint detection, demonstrating their efficacy as enhanced labeling agents. This study establishes a foundation for further research into the utilization of lanthanide complexes in optical applications and forensic investigations.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of Novel Pyrazole Derivatives: Design, Synthesis, and Integrated Biological Profiling (In Vitro and In Silico) of Their Antioxidant, Antibacterial, and Antimitotic Properties.","authors":"Muneera S M Al-Saleem, Yousef E Mukhrish, Bharath Kumar Chagaleti, Jehan Y Al-Humaidi, Kathiravan Mk, Ali Oubella, Reda A Haggam","doi":"10.1007/s10895-025-04555-w","DOIUrl":"https://doi.org/10.1007/s10895-025-04555-w","url":null,"abstract":"<p><p>This study investigates the biological activities of synthetic derivatives 7a-b, focusing on antioxidant, antibacterial, antimitotic, and mitotic index assays after NMR and mass spectrometry characterization. Derivative 7b showed superior antioxidant activity, with 75.19 ± 0.11% inhibition at 2.5 µmol/mL and an IC₅₀ of 0.85 ± 0.02 µmol/mL, outperforming 7a (IC₅₀ = 1.44 ± 0.13 µmol/mL). In antibacterial tests, 7b inhibited Staphylococcus aureus (16.3 mm zone), while 7a showed limited effects, particularly against Gram-negative bacteria. For antimitotic activity, 7b inhibited 60% of seed germination, while 7a had no effect. The mitotic index revealed that 7b inhibited up to 80% at 20 µmol/mL, similar to colchicine, whereas 7a had minimal impact. Overall, 7b demonstrated strong antioxidant, antibacterial, and antimitotic potential, while 7a showed lower activity across all tests. On the in-silico level, compound 7a demonstrated strong binding affinities across three biological targets. Against the antioxidant target Kelch-Neh2, it achieved a docking score of -9.08 kcal/mol and formed interactions with 14 residues, including Thr560. For antibacterial activity, it outperformed standard drugs with a docking score of -6.77 kcal/mol and hydrogen bonding to DNA gyrase residues Gly77 and Asn46. In anti-mitotic studies, it showed a docking score of -7.19 kcal/mol, forming stable interactions with the tubulin binding pocket, including Asn258. On the same compound, ADME analysis reveals high absorption and moderate interaction with P-glycoprotein. Toxicity predictions suggest a non-carcinogenic, non-mutagenic, non-cytotoxic, and non-immunotoxic profile. Density Functional Theory (DFT) indicated favorable electronic properties, including a low energy gap (0.2011 eV), moderate dipole moment, and high softness, supporting good bioactivity and stability. Molecular dynamics simulations confirmed structural stability of all three complexes over 100 ns, with RMSD values within 1.2-2.4 Å. MM-GBSA binding free energy analyses further supported stable binding, with ΔGbind values remaining strongly negative across simulation time frames. PCA and PDF analyses demonstrated consistent conformational stability for compound 7a compared to reference compounds, while Free Energy Landscape plots indicated stable and energetically favorable conformational states.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvatochromism of an ICT-based Colourimetric Probe and its Utility to Sense Cyanide in Aqueous Solution and to Estimate it in Food Materials.","authors":"P Ponlakshmi, V Dharaniprabha, Kuppanagounder P Elango","doi":"10.1007/s10895-025-04515-4","DOIUrl":"https://doi.org/10.1007/s10895-025-04515-4","url":null,"abstract":"<p><p>The high malignancy of CN^- to cause critical health problems and even death in trace concentrations and its potential presence in food, water and environment underscore the essence of CN^- detection. This paper outlines the synthesis of a novel intramolecular charge transfer (ICT) based colourimetric probe, PPL2, for the selective detection of cyanide ions in an aqueous solution. The different colours and spectral bands of PPL2 in different solvents reinforce its solvatochromism behaviour and ICT characteristics. The PPL2 exclusively changes its colour from yellow to colourless upon binding with CN^-, credited to deprotonation followed by nucleophilic addition, as accredited by ¹H and ¹³C-NMR and LC-MS spectral studies. The DFT/TD-DFT calculations attested the proposed sensing mechanism and authenticated the signalling mechanism of ICT modulation. The DFT/TD-DFT analysis portrayed the disruption of the ICT process of PPL2 upon cyanide binding. This probe targeted CN^- over other anions with a detection limit of 0.2 µM, eclipsing the WHO's guidelines for cyanide in drinking water. The practical applicability of PPL2 was illustrated through the successful estimation of cyanide in five different food samples, highlighting the probe's potential for food safety monitoring.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-Condition Classification of Oil Spill in Ice Areas Based on Laser-Induced Fluorescence.","authors":"Chenyu Zhao, Ying Li, Qintuan Xu, Yong Wang, Ming Xie, Xiangxiang Ji","doi":"10.1007/s10895-025-04547-w","DOIUrl":"https://doi.org/10.1007/s10895-025-04547-w","url":null,"abstract":"<p><p>Oil spill detection in ice-covered marine environments poses considerable challenges due to fluorescence signal interference from ice, heterogeneous surface properties, and environmental complexity. To address the lack of high-precision oil classification methods under such conditions, this study introduces a fluorescence-based multi-condition classification framework that integrates laser-induced fluorescence (LIF) spectroscopy with a machine learning model optimized by the Golden Sine Algorithm (Gold-SA). LIF spectra were collected for six oil types under four simulated ice coverage and oil volume scenarios, resulting in 24 distinct classification categories. Fluorescence signals underwent denoising using Savitzky-Golay (SG) filtering to improve signal stability and spectral reliability. The resulting Gold-SA-CatBoost model achieved 99.62% accuracy under laboratory conditions within the dataset and 100% accuracy in single-task oil-type identification, surpassing baseline models by a substantial margin. This work demonstrates the efficacy of integrating LIF with advanced optimization-based machine learning for robust oil spill detection under complex icy conditions. The proposed approach provides a viable fluorescence-based strategy for environmental monitoring in cold and polar marine regions.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Rapid Fluorescence Quenching Assay for Total Levothyroxine Quantification in Pharmaceutical and Supratherapeutic Serum Samples.","authors":"Enas T Abdel-Salam, Zeinab M Anwar, Ahmed Z Ibrahim, Hend M Musatfa","doi":"10.1007/s10895-025-04510-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04510-9","url":null,"abstract":"<p><p>A rapid, cost-effective spectrofluorometric method was developed for levothyroxine (T4) detection using fluorescein isothiocyanate (FITC) as a fluorescent probe. The method exploits FITC fluorescence quenching by T4 in Tris/phosphate buffers (pH 7.4),with linear ranges of 8.00 × 10⁻⁶ - 6.40 × 10⁻⁵ mol/L and detection limits of 9.60 × 10⁻⁶ mol/L (Tris) and 8.80 × 10⁻⁶ mol/L (phosphate). Stern-Volmer analysis confirmed dynamic quenching dominated by electrostatic interactions. The method demonstrated 102-104% recovery in spiked human serum and minimal interference from common drugs (Ciprofloxacin, Alendronate) and ions (Fe³⁺, Al³⁺). Compared to HPLC and kinetic methods, this approach offers simplicity, speed, and accessibility for routine pharmaceutical/clinical analysis.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145064780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic Catalysis and Sensing: Oxacalix[4]arene-Stabilized Rhodium Nanoparticles for Dye Degradation, Nitroaromatic Reduction and Al³⁺ Ion Detection.","authors":"Falak Panjwani, Manoj Vora, Banabithi Koley Seth, Shibu G PillaiCelebioglu, Ashukumar Verma, Vishv Desai, Vinod Jain","doi":"10.1007/s10895-025-04457-x","DOIUrl":"https://doi.org/10.1007/s10895-025-04457-x","url":null,"abstract":"<p><p>The use of rhodium nanoparticles (RhNPs) in biomedical, environmental and industrial applications is highly significant due to their unique catalytic, physical and chemical properties. Further, NPs encapsulated within macrocyclic structures with inherent hollow cavities are able to boost their catalytic activity. Here we are reporting for the first time, a versatile, non-toxic, third-generation supramolecule, calixarene, stabilised RhNPs. The novel sulphonic-acid functionalized oxacalix[4]arene derivative satbilized RhNPs (DSOC@RhNPs) were synthesised by a simple one-pot NaBH₄ reduction method at room temperature. The resulting DSOC@RhNPs were successfully characterized using UV-Vis, FT-IR, PXRD, HRTEM and EDX. The self-assembled, well-dispersed and spherical (average size of 6-8 nm) DSOC@RhNPs exhibited heterogeneous catalytic activity in the reduction of three, cationic, anionic and neutral carcinogenic azo dyes (methylene blue, methyl orange and neutral red). DSOC@RhNPs has the potential to reduce hazardous pollutants Like 4-nitrophenol (4-NP), retaining its catalytic efficiency across four consecutive cycles. The catalytic reduction of 4-NP and the formation of 4-AP were confirmed by UV-Vis and ESI-MS data. Further, newly systhesized DSOC@RhNPs exhibited excellent sensitivity in detecting Al³⁺ ions (LOD 9 µM). Therefore, the newly developed DSOC@RhNPs represent a versatile nanomaterial with potential for synergistic catalytic and sensing applications across diverse fields.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhodamine B Functionalised Schiff Base Chemosensor for Effective Detection of Cu(II) Ions in Water Sample.","authors":"Sushree Suman Dash, Pravin Kumar Kar, Renjith Bhaskaran","doi":"10.1007/s10895-025-04536-z","DOIUrl":"https://doi.org/10.1007/s10895-025-04536-z","url":null,"abstract":"<p><p>Schiff Base sensor (E)-3-(((3',6'-bis(diethylamino)spiro[isoindoline-1,9'-xanthen]-2-yl)imino)methyl)naphthalen-2-ol (SBRB2) was conceived and produced by employing a new Rhodamine functionalization. The ability of the sensor SBRB2 to detect Cu(II) was studied using fluorescence and UV-Vis spectroscopy. The sensor SBRB2 indicated sensitivity and specific selectivity to Cu(II) among other competitive metal ions based on fluorescence studies. A new emission peak appeared at 580 nm only in the presence of Cu(II). The chelation of the ligand with Cu (II) was responsible for the sensitivity to Cu (II). The binding constant and detection limit of the SBRB2: Cu (II) complex were found by the fluorescence titration to be 1.18 × 10⁴ M^-1 and 3.03 × 10^-6 M, respectively. It showed the 1:1 complexation between SBRB2 and Cu (II) was conformed from the DFT and TD-DFT study of SBRB2 in both solvent and gas phase.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145053984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational Molecular Design of New 3D Structured Quinoxaline Dyes With Panchromatic NIR Absorption and Enhanced Stability Enabling Efficient Copper-Based Dye Sensitized Solar Cells.","authors":"Yuwei Ding, Changyan Zhu, Ji Zhang, Hancheng Zhu","doi":"10.1007/s10895-025-04477-7","DOIUrl":"https://doi.org/10.1007/s10895-025-04477-7","url":null,"abstract":"<p><p>The development of panchromatic near-infrared (NIR) dyes with robust adsorption stability is crucial for enhancing the efficiency of copper-based dye-sensitized solar cells (Cu-DSSCs). By leveraging the champion dye ZS4 utilized in Cu-DSSCs, we have developed and theoretically investigated a range of dyes using DFT/TDDFT calculations, focusing on the interfacial electronic dynamics of dye@(TiO₂)₈₂. Our findings reveal that dyes incorporating pyrazino[2,3-g]quinoxaline groups, in place of the diphenylquinoxaline group in ZS4, exhibit significantly improved light-harvesting abilities. These dyes display an NIR absorption spectrum that spans the entire UV-visible range while extending into the NIR region. Notably, these dyes maintain intramolecular charge transfer characteristics comparable to ZS4, resulting in a maximum photocurrent density enhancement of 11.5 mA/cm². Furthermore, the use of heterocyclic anchoring groups instead of the cyanoacrylic acid group substantially increases the adsorption stability. By meticulously considering various factors influencing dye performance, we identified the pyrazino[2,3-g]quinoxaline-cyclopenta[1,2-b:5,4-b']dithiophene-2-(1,1-dicyanomethylene) combination as superior to the champion dye ZS4, thereby contributing to the improved efficiency and stability of Cu-DSSCs.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145040339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}