Journal of Fluorescence最新文献

{"title":"A Sensitive and Reversible Fluorescent Probe for Selective Detection of Hg²⁺ and Au³⁺ Ions.","authors":"Aslı Eldem, Berna Ceren Ozcan, Simge Kalmaz, Muhammed Ucuncu","doi":"10.1007/s10895-025-04482-w","DOIUrl":"https://doi.org/10.1007/s10895-025-04482-w","url":null,"abstract":"<p><p>The rapid and reliable detection of toxic heavy metals in environmental water sources is crucial due to the significant health risks they pose to humans. This study presents the design and development of a novel xanthene-based fluorescent probe, XH-HDZ, which is functionalized with a 2-pyridylhydrazone recognition unit. The probe initially exhibits strong fluorescence, which is quickly quenched (< 1 min) upon interacting with Hg²⁺ or Au³⁺ ions. The quenching process follows a reversible 2:1 binding mechanism, as confirmed by Job's Plot analysis and ¹H NMR titration studies. The limits of detection (LOD) for the probe were determined to be 268 nM for Hg²⁺ and 425 nM for Au³⁺, indicating high sensitivity. Furthermore, the probe was able to detect target metal ions in real water samples, including drinking water and tap water, highlighting its potential for environmental monitoring. Additionally, TLC strips were prepared and successfully used for the visual detection of Hg²⁺ and Au³⁺ ions under both daylight and UV illumination.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956616","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":"Total Determination and Chemical Speciation of Fe²⁺and Fe³⁺ Species in Water Based on the Fluorescence Quenching of 4, 5- Dihydroxy-1, 3-benzenedisulfonic Acid' as a Sensing Platform.","authors":"K M Alotaibi, Z M Saigl, K S Alblawi, H Alwael, T N Abduljabbar, G I Mohammed, M S El-Shahawi","doi":"10.1007/s10895-025-04467-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04467-9","url":null,"abstract":"<p><p>Total quantification and speciation of Fe²⁺ and Fe³⁺ at trace levels in aqueous environments has emerged as an imperative analytical challenge for ecological systems and public health. Implementation of wavelength-dependent spectrochemical methodologies based on formation of chromogenic Fe³⁺ chelate for Fe³⁺ quantification in aqueous media also remains intrinsically challenging owing to intrinsic self-absorbance, and spectral convolution. Thus, the current study reports the development of a direct and selective eco-friendly spectrofluorometric probe for Fe³⁺ detection in water. The sensor 4, 5- dihydroxy-1, 3-benzenedisulfonic acid (Tiron) displays strong emission which undergoes significant quenching in the fluorescence intensity (at λ_ex/em = 290/350 nm) upon reaction with Fe²⁺ at pH 8-9 in the presence of interfering metal ions, allowing for rapid and efficient detection. The probe was sensitive to implement the produced change in color with a total assay reaction time less than 3 min. Detailed spectroscopic investigation reveal a high binding affinity between the Fe³⁺ ions and the sensor, ascribed to specific complex formation. The limit of detection (LOD) and quantitation (LOQ) and linear dynamic rang (LDR) of the assay were 0.015, 0.04 and 0.05-5 mg L^-1 Fe³⁺, respectively. The probe was favorably used for total detection and sequential speciation of trace levels of Fe²⁺ & Fe³⁺ in water after oxidation of the former to Fe³⁺. Spectroscopic studies suggested high coordinating attraction and stability between the sensor and Fe³⁺ ions. The probe was fruitfully validated by comparing the results with the official inductively coupled plasma-optical emission spectrometry (ICP-OES) data using Student t and F tests signifying the high precision, accuracy and reliability for Fe³⁺ detection in water samples. The attractive features of the probe comprises its simplicity, no usage of organic solvents, short reaction time; high reactivity, stable response, selective towards Fe³⁺, and sensitive for total quantification of iron species. The probe can assist as a talented tool for application in regions of limiting resources specifically concerning iron pollution.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956666","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":"Quinoxaline Based Three Channel Fluorescent-colorimetric Chemosensor for Selective and Sensitive Detection of Ag⁺ Ions: Biological and Environmental Applications.","authors":"Srishti Dutta, Vanshika Sharma, Abhilash Pandey, Dishen Kumar, Devanand Sahu, Goutam Kumar Patra","doi":"10.1007/s10895-025-04528-z","DOIUrl":"https://doi.org/10.1007/s10895-025-04528-z","url":null,"abstract":"<p><p>Herein we describe a quinoxaline mono Schiff base, synthesised from benzil and o-phenylene diamine that may be used as a fluorescent-colourimetric chemosensor to detect Ag⁺ ions in organic media with high selectivity and sensitivity over other competitive ions. The sensing processes were operated by visual change, absorption, and emission measurements, and the binding sites were confirmed by FTIR and single-crystal structure of the Ag(I)- complex. From Job-plot analysis, ESI-mass spectra and XRD studies 1:2 binding stoichiometry between host-guest was observed. The detection limit values for Ag⁺ obtained 7.9 × 10^-6 M colorimetrically and 1.25 × 10^-6 M fluorometrically. Moreover the receptor L could operate in a wide range of pH 6-11 including physiological pH, and can be successfully applied to environmental samples, BSA proteins and living cells for detecting Ag⁺ ion. Based on these findings, we think that the receptor L will be an impressive addition to the field of straightforward 2,3-Diphenylquinoxaline based Schiff base chemosensors for analytes.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956603","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":"Synthesis and Characterization of Innovative Tetraazamacrocyclic Complexes of La(III) and their Antibacterial, Antifungal, Antioxidant and Antidiabetic Activity.","authors":"Medha Babel, Jaswant Raj, Manish Kumar Yadav, Nighat Fahmi, Anita Kumari","doi":"10.1007/s10895-025-04495-5","DOIUrl":"https://doi.org/10.1007/s10895-025-04495-5","url":null,"abstract":"<p><p>A new series of macrocyclic complexes of lanthanum (III) derived from the template condensation reaction of bis(benzyl)-4-nitro-1,2-phenylene diamine with different diamines such as 4-nitro-1,2-phenylene diamine, 4-bromo-1,2-phenylene diamine, ethylene diamine, 1,2-diamino propane and 4-chloro-1,2-phenylene diamine in the presence of lanthanum chloride salt. The ligand was synthesized by the condensation of benzyl and 4-nitro-1,2 phenylene diamine. The synthesized complexes have been analyzed by elemental analysis, conductance measurement and characterized by spectral analysis, i.e. UV-visible, IR, ¹H-NMR, Mass, XRD and TGA techniques. The presence of sharp narrow peaks in the X-ray diffractogram confirmed the crystalline nature of the synthesized complexes. Antioxidant and Antidiabetic studies were performed for ligand and all complexes. The strongest antioxidant activity was recorded as 80% at 1000 mg/L for [La(C₄₀H₂₆N₅O₂Cl₂Br)]Cl.5H₂O complex with IC₅₀ value of 203.9247 mg/L. In addition to these, compounds were successfully also screened for their biological efficacies against a few pathogenic strains of bacteria and fungi.It was found that ligand and compexes show good antimicrobial results.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956615","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":"Green Emitting Phosphor of Praseodymium Doped La(OH)₃ Nanoparticles Synthesized Via Sol-Gel Combustion Technique.","authors":"S Sangeetha Priya, V Anslin Ferby","doi":"10.1007/s10895-025-04498-2","DOIUrl":"https://doi.org/10.1007/s10895-025-04498-2","url":null,"abstract":"<p><p>In this study, pure and Pr³⁺ ions doped La(OH)₃ phosphor for different concentrations (2, 5, and 10 wt%) is produced via the sol-gel combustion route, and its crystal structure, vibrational, morphological, optical, and photoluminescent properties were studied. XRD investigations confirmed that the hexagonal phase, which matches the standard lattice constants a = b = 6.518 Å and c = 3.841 Å for the as-synthesized pure and Pr³⁺ doped La(OH)₃ nanoparticles. The particle size confirmed from the TEM image is 37 nm and is nearly identical to the crystallite size as measured by XRD measurements. The average band gap of Pr³⁺ doped La(OH)₃ nanoparticles is found to be 3.5 eV. The PL emission spectrum of 2 wt% of Pr doped La(OH)₃ nanoparticles show high emission intensity, which confirms the green emission around 511 nm with transition ³P₀→³H₄. The CIE coordinates could confirm that the presence of Pr³⁺ ion-doped La(OH)₃ phosphors is beneficial for green emission phosphors as cool white light. The lifetimes of Pr³⁺ ions doped in La(OH)₃ nanoparticles are determined to be 2.166 ms, 1.982 ms, and 2.143 ms for 2, 5, and 10 wt% of Pr³⁺ ions, respectively. Through this research, the doping effects of rare earth ions are better comprehended, and new design ideas for enhanced luminescent materials that can be utilized in light-emitting diodes and display systems.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956743","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":"Synthesis of ZnS and rGO/ZnS Nanocomposite, Application for Photodegradation of Methylene Blue and Heavy Metal Ions Detection in Water.","authors":"Jaleh Erfani Jam, Hamid Rezagholipour Dizaji, Mehdi Molaei","doi":"10.1007/s10895-025-04522-5","DOIUrl":"https://doi.org/10.1007/s10895-025-04522-5","url":null,"abstract":"<p><p>The ZnS quantum dots (QDs) and rGO/ZnS nanocomposite were prepared by a simple photochemical method. The structure and morphology of the ZnS QDs and rGO/ZnS nanocomposite samples were characterized by XRD, TEM, RAMAN, FTIR, FESEM, EDAX, and optical transmission techniques. X-ray diffraction results confirmed the formation of cubic zinc blende ZnS QDs and rGO/ZnS nanocomposite. TEM images showed that the synthesized QDs were spherical in shape. Photoluminescence spectra of the specimens revealed a broad emission with a peak centered at 490 nanometers (nm) related to surface defects. In this work, the prepared ZnS QDs were employed as a quenched fluorescence sensor for the fast and simple detecting heavy metal ions in water and indicated good performance for detecting lead ion (Pb⁺²) with high selectivity. It was noticed that, the photoluminescence spectral intensity of ZnS QDs gradually decreased in the presence of Lead ion (Pb⁺²), and the light emission was completely quenched in the presence of 60 nanomolar (nM) lead ion (Pb⁺²). Also, the removal of organic dye methylene blue (MB), as an organic pollutant, from aqueous solution through photodegradation process by ZnS quantum dots as well as rGO/ZnS nanocomposite as photocatalyst in the presence of UV light was investigated. The rGO/ZnS nanocomposite showed better performance for photodegradation of methylene blue compared to other samples. In addition, various radical scavengers utilized to find out the parameter which had the main effect in the MB photodegradation process by rGO/ZnS nanocomposite under UV light. The results of the radical scavenger experiment confirmed that surface electrons of rGO/ZnS nanocomposites had an essential role in the photodegradation process.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956674","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":"Synthesis, Antimicrobial Potential and Copper (II) Sensing Application of New Thiosemicarbazone and Semicarbazone Derivatives.","authors":"Ritika Dudeja, Shehneela Nisa, Mohamad Yusuf, Ashok Kumar Malik","doi":"10.1007/s10895-025-04462-0","DOIUrl":"https://doi.org/10.1007/s10895-025-04462-0","url":null,"abstract":"<p><p>Thiosemicarbazone (TSC) and semicarbazone (SC) derivatives have been evaluated as ligands for the detection Cu²⁺ by using UV-visible spectroscopy and fluorescence quenching techniques. TSC outperformed SC across all the parameters demonstrating a lower limit of detection (LOD) of 0.99 µM as compared to 1.82 µM for SC and a higher binding constant (8.33 × 10² M^-1 for TSC and 7.62 × 10² M^-1 for SC) as determined by the Benesi-Hildebrand plot. Job's plot analysis confirmed the formation of stable 1:1 copper-ligand complexes. DFT studies further supported superior binding efficiency and electronic properties in favour of TSC. Antimicrobial activity results displayed that TSC derivative exhibited highly effective response against Klebsiella pneumoniae, Bacillus subtilis, Staphylococcus aureus, Fusarium oxysporum & Aspergillus janus (MIC- 8 µg/ml). The sensors successfully detected Cu²⁺ ions in tap, river and mineral water demonstrating their environmental applicability. These investigations collectively established the TSC derivative as a more promising ligand, owing to its dual functionality exhibiting both effective antimicrobial activity and Cu²⁺ sensing attributed to its high sensitivity, strong binding affinity, and stable complex formation.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956602","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":"Bodipy-based Ratiometric Fluorescent Probe for Sensing Fe³⁺ with Large Absorption and Emission Shifts.","authors":"Mingya Wang, Yue Zhao, Junli Shi, Qi Wang, Linxiu Zhao, Shengling Li","doi":"10.1007/s10895-025-04534-1","DOIUrl":"https://doi.org/10.1007/s10895-025-04534-1","url":null,"abstract":"<p><p>Secondary development of fluorescent probes can fully exploit the optical advantages of existing probes while avoiding resource wastage from redundant research and development. This paper investigates the metal ion recognition properties of a reported probe (BDF) in methanol solution. Upon addition of Fe³⁺, the probe solution exhibits a distinct color change from light blue to pale pink, accompanied by a 55nm blue shift in the maximum absorption wavelength. Concurrently, the fluorescence emission shifts from red to bright green, with a 155nm blue shift in the emission wavelength. Both signals feature large Stokes shifts, significantly enhancing the clarity and accuracy of colorimetric recognition. The calculated UV-Vis and fluorescence limits of detection (LOD) were 0.0984 µM and 1.3309 µM, respectively, with limits of quantification (LOQ) of 0.32 µM and 4.43 µM. To validate its practical utility, test strips, medical swabs, and a smartphone for quantitative Fe³⁺ detection were employed, significantly enhancing the probe's potential and convenience for real-world applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956758","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":"Phosphorus and Nitrogen-Doped Graphene Quantum Dots as an Effective Fluorescence Sensor for Furazolidone Determination in Biological and Pharmaceutical Samples.","authors":"Faezeh Hallaj, Ali Mohammad Haji Shabani, Roya Afsharipour, Shayessteh Dadfarnia, Mohammadjavad Jahanshahi","doi":"10.1007/s10895-025-04511-8","DOIUrl":"https://doi.org/10.1007/s10895-025-04511-8","url":null,"abstract":"<p><p>Herein, a cost-effective, efficient, sensitive, and selective fluorescent sensor of graphene quantum dots doped with phosphorus and nitrogen (P, N-GQDs) is fabricated for direct determination of furazolidone in human urine and serum samples. The sensor is constructed via a facile hydrothermal method using urea and triphenylphosphine as nitrogen and phosphorus sources. The synthesized P, N-GQDs have a uniform size of less than 5 nm with high photoluminescence properties. The fluorescence intensity of P, N-GQDs at the wavelength of 447 nm is reduced in the presence of copper ions due to the electrostatic interaction between copper ions and the charged surface of the quantum dots. However, in the presence of furazolidone, the formation of a complex between the drug and the copper ions leads to the retrieval of the fluorescence emission of the P, N-GQDs, which is highly sensitive to furazolidone concentration. Under optimal conditions, the linear range of the calibration curve was 0.05-20 µmol L^-1, and the detection limit was 0.009 µmol L^-1, enabling P, N-GQDs as an effective and sensitive nanoprobe for furazolidone detection. The method was successfully applied to the direct measurement of furazolidone in real urine, serum, and tablet samples.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956645","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":"From Structure to Signal: Optical Tuning of New g-C3N4 Schiff Bases for Metal Ion Sensing.","authors":"Kaouther Abbassi, Soumaya Agren, Jamal El Haskouri, Emmanuel Beyou, Mohamed Hassen V Baouab","doi":"10.1007/s10895-025-04459-9","DOIUrl":"https://doi.org/10.1007/s10895-025-04459-9","url":null,"abstract":"","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144956764","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}