Journal of Fluorescence最新文献

{"title":"Trivalent Terbium Incorporated into Kanemite and Its Photoluminescent Property.","authors":"Yu Ruan, Yu Zhong, Wanyun Feng, Xiaoqiang Shang, Yufeng Chen","doi":"10.1007/s10895-026-04965-4","DOIUrl":"https://doi.org/10.1007/s10895-026-04965-4","url":null,"abstract":"<p><p>Trivalent terbium (Tb³⁺) incorporated into Na-kanemite (Na-Ka) was firstly reported. Various characterizations, including X-ray diffraction (XRD), Scanning electron microscope equipped with energy dispersive spectroscopy (SEM/EDS), Inductively coupled plasma-mass spectrometry (ICP-MS), thermogravimetry (TG), X-ray photoelectron spectra (XPS), and Photoluminescent (PL) spectra were employed to investigate the structure, composition, morphology, and photoluminescent property of samples. XRD result indicated that the Na-Ka was an orthorhombic structure with lattice parameters of a = 7.279(3), b = 20.456(6), and c = 4.942(2)Å. After ion exchange, the product Tb-Ka showed no diffraction peaks except two weak diffraction peaks. SEM images suggested that the Tb-Ka was alike to Na-Ka in the morphology. EDS and XPS results confirmed that the Na⁺ ions in Na-Ka were almost fully replaced by Tb³⁺ ions after ion exchange. Moreover, the Tb element was uniformly distributed throughout the Tb-Ka. Photoluminescence revealed that the Tb-Ka exhibited strong emissions attributed to ⁵D₄→⁷F_J (J = 3, 4, 5, 6) transitions, and the strongest emission was at 542 nm (⁵D₄→⁷F₅). After the Tb-Ka was thermally treated at 200 ℃, 400 ℃, 600 ℃, or 800 ℃ for 2 h, the photoluminescent intensity greatly decreased. The PL decay behavior at 542 nm for both Tb-Ka and its thermally treated samples are well fitted with bi-exponential decay model. The average lifetime of 542 nm for Tb-Ka (0.990ms) was longer than those of thermally treated samples (0.709 ~ 0.767 ms). These results implied the layered kanemite was favorable for the Tb³⁺ luminescence.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110675","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":"Intrinsic Fluorescence as a Probe of Structural Dynamics and Interactions of Human Adenovirus with Surfactants and Liposomes.","authors":"Nicole Sayuri Miranda Okayama, Menira Souza, Cássia Alessandra Marquezin","doi":"10.1007/s10895-026-04962-7","DOIUrl":"https://doi.org/10.1007/s10895-026-04962-7","url":null,"abstract":"<p><p>In this work, the intrinsic fluorescence of Human Adenovirus serotype 2 (HAdV-2), arising from tryptophan (Trp) and tyrosine (Tyr) residues present in viral proteins, was used to monitor structural changes in the three-dimensional organization of the viral particle as a function of the inactivation method employed (UV irradiation or paraformaldehyde (PFA) treatment), temperature, and the presence of negatively and positively charged surfactants. Steady-state fluorescence anisotropy was used to investigate the interaction between HAdV-2 and zwitterionic or negatively charged liposomes by monitoring both the extrinsic fluorescent probe 1,6-diphenyl-1,3,5-hexatriene (DPH) inserted into the lipid bilayer and the intrinsic anisotropy of Trp residues from viral proteins. Tyr fluorescence emission proved to be more sensitive to temperature variations, whereas Trp emission was more strongly affected in samples inactivated with PFA. In the presence of surfactants, stronger interactions were observed with negatively charged micelles, resulting in enhanced Tyr fluorescence and quenched Trp fluorescence. The most pronounced effect was observed for the interaction between HAdV-2 and negatively charged 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol), sodium salt (DPPG) liposomes. In the presence of viral particles, the phase transition temperature (T_m) of DPPG liposomes increased by approximately 11 °C, while no detectable structural changes were observed in the three-dimensional organization of the viral particle itself. Overall, these results highlight intrinsic fluorescence as a valuable approach for probing the structural organization of HAdV-2 under different environmental and interfacial conditions.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110591","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":"Enhancing the Conjugation of Cyclotriphosphazene Covalent Organic Frameworks to Improve the Fluorescence Detection Performance of Hydrazine.","authors":"Qian Zheng, Liwen Chen, Jinmin Wang, Yong Qin","doi":"10.1007/s10895-026-04964-5","DOIUrl":"https://doi.org/10.1007/s10895-026-04964-5","url":null,"abstract":"<p><p>Hydrazine (N₂H₄) is widely employed in industrial processes; however, its high toxicity poses significant environmental and occupational health risks due to potential leakage or unintended exposure. Consequently, the development of a simple, sensitive and selective method for N₂H₄ detection in environmental matrices is essential. In this work, covalent organic framework (PTCOF) was synthesized via condensation of hexachlorocyclotriphosphazene (HCCP) and 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TAPT). Leveraging the high reactivity of the P-Cl bonds in PTCOF, aniline was site-selectively grafted onto the framework to yield PTCOF-AN. This functionalization strategically optimized the intrinsic donor-π-acceptor (D-π-A) architecture and enhanced intramolecular charge transfer (ICT) efficiency within PTCOF-AN. PTCOF-AN exhibited fluorescence \"turn-on\" response toward N₂H₄, with low limit of detection (LOD) of 153 nM, representing improvements in both sensitivity and selectivity over PTCOF. The fluorescence enhancement is attributed to the reducing capability of N₂H₄ and the inhibition of ICT process in PTCOF-AN. This work demonstrates a rational design strategy for tailoring the photophysical properties of functionalized COF, offering a promising avenue for N₂H₄ monitoring.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110542","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":"Rapid Fluorescent Determination of Imidacloprid in Food Samples Using a Phenothiazine-oxadiazole Probe.","authors":"Walaa Sobhy, Safa A Badawy, Magdi E Khalifa, Abdelaziz Kishk, Fathi S Awad","doi":"10.1007/s10895-026-04948-5","DOIUrl":"https://doi.org/10.1007/s10895-026-04948-5","url":null,"abstract":"<p><p>A phenothiazine-oxadiazole derivative (WA-1) was synthesized and used as a fluorescent probe for the rapid and selective determination of imidacloprid (IMI) in food samples. The probe exhibited strong fluorescence emission at 470 nm, which was efficiently quenched upon IMI interaction. Under optimized conditions, the fluorescence response showed a good linear relationship over the concentration range of 0.025-1.0 ppm, with a low detection limit of 8.3 × 10^- 3 ppm. The developed sensing system demonstrated rapid response behavior (2 min) and high selectivity toward IMI in the presence of other pesticides and common metal ions. The proposed method was successfully applied to determine IMI in different food matrices, providing satisfactory recovery values and good agreement with the reference HPLC method. The sensing mechanism was supported by theoretical calculations, suggesting that fluorescence quenching originates from the modulation of the intramolecular charge transfer pathway through intermolecular interactions with IMI. These findings demonstrate the potential of WA-1 as a simple, sensitive, and reliable fluorescence platform for monitoring imidacloprid residues in food.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110523","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 Coumarin-Derived Fluorescent Probe For The Rapid Detection Of Nitroaromatic Explosives TNP and PYX.","authors":"Junli Shi, Shengling Li, Congying Li, Xinyuan Xue, Yue Zhao, Mingya Wang, Linxiu Zhao, Fanfan Shen, Duanlin Cao","doi":"10.1007/s10895-026-04953-8","DOIUrl":"https://doi.org/10.1007/s10895-026-04953-8","url":null,"abstract":"<p><p>Nitroaromatic explosives are the most commonly used military explosives. In this study, the known compound (E)-7-(diethylamino)-3-(3-(4-(dimethylamino)phenyl)acryloyl)-2H-chromen-2-one (hereinafter referred to as CKY) was employed as a fluorescent probe to systematically investigate its fluorescence response toward the nitroaromatic explosives 2,4,6-trinitrophenol (TNP) and 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX). CKY showed rapid response (within 10 s) and pronounced fluorescence quenching toward TNP and PYX, with detection limits (LOD) of 3.37 µM and 1.86 µM, respectively. Combined with spectroscopic analysis and theoretical calculations, the fluorescence quenching mechanism of the probe toward the target analytes was discussed. In terms of practical applications, CKY-loaded test strips integrated with smartphone-based color recognition software were developed to establish a semiquantitative detection method for TNP and PYX. Furthermore, the response of the probe to exogenous TNP and PYX was evaluated in living HeLa cells, and satisfactory results were obtained. This work not only expands the application of the known compound CKY in the field of nitroaromatic explosive detection but also provides a candidate material for the rapid detection of TNP and PYX.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110590","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":"Ratiometric Quantum Dot Nanosensor for Reliable Dual Detection of Silver Ions and L-Cysteine in Biological Matrices.","authors":"Qiongdan Zhang, Yuxing Wan, Huihong Duan, Caiyun Peng, Wenbing Sheng, Yijing Tao, Wei Wang, Bin Li","doi":"10.1007/s10895-026-04957-4","DOIUrl":"https://doi.org/10.1007/s10895-026-04957-4","url":null,"abstract":"<p><p>Single-signal fluorescent sensing mode for sequential detection of Ag⁺ and L-cysteine (L-Cys) in complex biological matrices are susceptible to environmental interference and false-positive responses. Herein, we develop a ratiometric fluorescent sensing mode based on mixed quantum dots (R-QDs) by combining blue-emitting N-CQDs (450 nm) and red-emitting CdTe QDs (630 nm). Although both QDs are quenched by Ag⁺, their differential quenching provides a concentration-dependent F₆₃₀/F₄₅₅ ratio and an internal referencing effect. The cascade mechanism enables dual-target detection: Ag⁺ quenches both QDs (LOD = 0.04 µM), while L-Cys restores fluorescence via competitive binding (LOD = 8.7 µM). The advantage of the ratiometric design becomes particularly evident in complex matrices. In human serum, the R-QDs sensor exhibited a minimal increase in detection limit (from 8.7 µM to 15.1 µM), whereas the single-signal sensors showed substantially higher detection limits (reaching 38.9-50.1 µM). This differential performance correlated with superior recovery rates for the ratiometric sensor (95.2-110.1%, RSD < 5.1%). This work provides a reliable ratiometric platform where self-calibration advantages become critical for accurate detection in real-world biological samples.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110611","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 Xanthene-Scaffold Fluorescent Probe for Dual-Mode Fluorescence-Colorimetric Detection of Hydrazine and its Application in Environmental Analysis.","authors":"Yuanpei Lu, Mei Wang, Yanqing Xu, Han Li, Meiqian Zhang, Guangcheng Lai, Hanfeng Cui","doi":"10.1007/s10895-026-04960-9","DOIUrl":"https://doi.org/10.1007/s10895-026-04960-9","url":null,"abstract":"<p><p>Hydrazine (N₂H₄) is recognized as a hazardous substance with severe implications for human health, ecological balance, and food security. To address this, we present HCA-IN, a novel xanthene-derived fluorescent probe engineered for the highly sensitive and specific recognition of N₂H₄. HCA-IN was constructed through a Knoevenagel condensation reaction between a xanthene aldehyde derived from 4-(diethylamino)salicylaldehyde and 1,3-indanedione. Mechanistically, the recognition relies on a N₂H₄-induced Michael addition followed by a specific cleavage event, which dynamically alters the intramolecular charge-transfer (ICT) pathway, eliciting both a remarkable fluorescence amplification and a distinct naked-eye color shift. In a THF/10 mM PBS system (8:2, v/v; pH 7.0), HCA-IN exhibited a rapid response to hydrazine, reaching equilibrium within 120 s, and delivered a broad linear working range (1-50 µM) alongside an exceptionally low limit of detection (LOD) of 6.31 nM. The probe showed excellent selectivity against prevalent metal ions, amino acids, various amines, and biological small molecules. Standard-addition experiments in lake water gave recoveries of 97.2-106.8% with relative standard deviations below 4.22%, indicating good accuracy and reproducibility. In addition, smartphone-assisted RGB analysis enabled portable quantitative detection of hydrazine, demonstrating excellent linearity (0-60 µM, R² = 0.99666) for ΔRGB against N₂H₄ levels. This study provides an efficient and convenient fluorescence sensing platform for trace hydrazine detection in environmental analysis.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149110526","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":"Photovoltaic Performance of the Additional Acceptor Impact in D-1 Structured Molecules for Dye-Sensitized Solar Cells via TD-DFT Study.","authors":"A Arunkumar, Rodouan Touti, Mohamed Saad","doi":"10.1007/s10895-026-04918-x","DOIUrl":"10.1007/s10895-026-04918-x","url":null,"abstract":"<p><p>In this work, seven newly designed donor-acceptor1-spacer-acceptor2 (D-A1-π-A2) structured metal-free efficient organic compounds (A1-A7) were designed and tested for dye- sensitized solar cells (DSSCs). The D, π, and A groups were presented in (E)-2-(3-((E)-4-(dimethylamino)styryl)-5,5-dimethylcyclohex-2-enylidene)-2-cyanoacetic acid (D-1). The additional A components have been incorporated into the D-1 structure, and their influence on DSSC applications has been examined. Time-dependent density functional theory (TD- DFT) was used to determine the maximum absorption wavelength (λmax) of D-1 using hybrid functionals with a 6-311 + + G(2d,2p) basis set. According to these findings, TD-CAM-B3LYP used the same basis set and adhered to the optical λmax values for A1-A7. The solvent acetonitrile effects were followed in the literature with a conductor-like polarizable continuum model (C-PCM). The DFT and TD-DFT approaches were used to thoroughly study the molecular orbitals (MOs), λmax, and photovoltaic (PV) parameters of the molecules A1-A7. The computed results showed that all designed dyes offered better A-groups in D-A1-π-A2 sensitizers. The improved electronic transition, red-shifted λmax, and good PV characteristics of that structure make it a suitable chromophore for DSSCs.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5579-5587"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148905519","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":"High-Efficiency Fingerprint Detection Based on Eu³⁺-Doped AgYMo₂O₈ red Phosphors Optimized by Hydrothermal Method.","authors":"Jing Liu, Ya Yang, Tianle Liu, Anlin Zhang, Bin Deng, Ruijin Yu","doi":"10.1007/s10895-026-04917-y","DOIUrl":"10.1007/s10895-026-04917-y","url":null,"abstract":"<p><p>In forensic science, latent fingerprints represent a crucial type of evidence for individual identification. Nevertheless, the features of such fingerprints exist at a microscopic scale. The application of fluorescent powder during the development of latent fingerprints can markedly improve image contrast while reducing background interference, thus enabling the acquisition of high-quality fingerprint images. In the present work, AgYMo₂O₈:Eu³⁺ red fluorescent powder was successfully synthesized using both solid phase and hydrothermal methods. X-ray diffraction (XRD) together with Rietveld refinement was employed to confirm the phase structure of the obtained samples. A high energy absorption efficiency exists within the charge transfer band from [MoO₄]^2- to Eu³⁺, which leads to efficient red-light emission and the production of a high contrast background light. Under excitation at 465 nm, the Eu³⁺ doped samples exhibit red emission at 616 nm, with an optimal doping concentration determined to be 0.40 mol. The primary mechanism behind concentration quenching is the interaction between the nearest neighboring ions. The prepared samples possess high thermal stability and outstanding thermal stability. After five thermal cycles, the luminescence intensity of the material recovered to approximately 99%. Among the two methods, the samples optimized by the hydrothermal route display a homogeneous particle size distribution and good dispersion. These samples can clearly reveal the level I to level III structures of fingerprints and are well suited for fingerprint visualization on various substrate materials. Overall, both synthesis approaches yielded powders that showed excellent sensitivity, selectivity, and contrast accompanied by minimal background interference. These results fully demonstrate the application potential of AgYMo₂O₈:Eu³⁺ in the field of latent fingerprint imaging.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5629-5647"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148919353","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":"Construction of a New Lanthanide-Based Nanomaterial as Multifunctional Bio-Probes for in Vivo Imaging.","authors":"Lei Mu, Xinyu Ding, Chenchen Xue, Ying Tao, Qingqing Tang, Huaiting Wang, Miaomiao Zou, Yafang Cao, Yifu Mao, Lijun Xiang","doi":"10.1007/s10895-026-04934-x","DOIUrl":"10.1007/s10895-026-04934-x","url":null,"abstract":"<p><p>Bioimaging has promising prospects for clinical diagnosis. However, single-modal bioimaging can not satisfy the high demands of diagnostic information. Herein, we constructed a novel lanthanide-based bio-probe Sr₂NdF₇: Er³⁺/Tm³⁺ (abbreviated as SNF) for dual-modal imaging diagnosis. The obtained SNF exhibited a small size of ~ 24 nm, intense upconverted luminescence (UCL), excellent X-ray absorption capability and superior biocompatibility. Importantly, SNF could successfully realize UCL and CT imaging in vivo/vitro. Notably, SNF didn't accumulate in the body for a long time and could be completely metabolized out from the body, which possessed the high safety of in vivo application. Collectively, SNF has promising potential in application for non-invasive diagnostic imaging. This work facilitates the translation of lanthanide-based materials in clinical applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5787-5797"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148963073","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}