Journal of Fluorescence最新文献

{"title":"Tuning the Chain Conformation of Pyrenyl-Pyridine Conjugated Oligomer Nanoprobe for Ultrasensitive Fluorescent Assaying of Fe³⁺ and Ascorbic Acid.","authors":"Yaqian Zhao, Hailin Wang, Hongmei Huang, Mixue Chen, Yuqi Wen, Zisheng Xiao, Yi Xiao, Youyu Zhang, Xiaoxiao He, Kemin Wang","doi":"10.1007/s10895-025-04158-5","DOIUrl":"https://doi.org/10.1007/s10895-025-04158-5","url":null,"abstract":"<p><p>The chain conformation of conjugated oligomers are critical for constructing ultrafine fluorescent nanoprobes with outstanding sensing performances owing to their suitable molecular flexibility and fine-tuned aggregation state. Herein, a series of pyrenyl-pyridine oligomers (OPPs) were designed and conveniently prepared by one-pot Sonogashira coupling of flexible 2,6-bis(ethynyl)pyridine with different rigid pyrene unit. Novel fluorescent nanoprobes (OPPNPs, ca. 2.50-25.4 nm in diameter) were hence readily fabricated through a microemulsion route, showcasing significantly distinct detecting properties due to their distinctive chain conformations. In particular, ultrasmall OPP1NPs (~ 3.75 nm) bearing zig-zag-shaped 1,6-substituted pyrenyl-pyridyl conjugated chain presented superior π-π stacking, strong excimer emission and best sensing performances for Fe³⁺ via electron transfer (ET) and OPP1NPs aggregation-based fluorescence quenching. Additionally, ascorbic acid (AA) could act as an effective reducer and chelator, resulting in the fluorescence recovery of OPP1NPs. Under the optimal conditions, ultralow detection limits of OPP1NPs for Fe³⁺ (LOD, 0.06 nM, S/N = 3) and AA (LOD, 8 nM) were achieved. Furthermore, small and biocompatible OPP1NPs enabled efficient fluorescence imaging of Fe³⁺ and AA in live cells. Moreover, the conformation-regulated sensing strategy and ET mechanism are also supported by DFT calculations.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408558","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":"Innovative Cerium and Chromium Co-doped Carbon Quantum Dots: Synthesis, Smartphone-Compatible and Sensitive Fluorescence Approach for Detection of Vitamin B₁₂.","authors":"Bindu Dhuva, Sangeeta Obrai","doi":"10.1007/s10895-025-04165-6","DOIUrl":"https://doi.org/10.1007/s10895-025-04165-6","url":null,"abstract":"<p><p>Carbon quantum dots (CQDs) have acquired significant attention recently due to their unique properties and wide-ranging applications. These nanoscale carbon-based materials exhibit exceptional photoluminescence, excellent biocompatibility, and remarkable chemical stability, making them promising candidates for various technological advancements. The present study describes novel heteroatom co-doped carbon quantum dots as sensors to probe VitB₁₂ biomolecules in an aqueous solution by employing sensitive and straightforward fluorescence quenching measurements. The designed CQDs were characterised with UV-Vis absorption spectroscopy, FT-IR, XRD, HR-TEM, SEM, EDS, XPS, TCS-PC and fluorescence spectroscopy. The current work aims to modify size distribution and heteroatom doping to create cerium and chromium co-doped CQDs (Ce/Cr-CQDs) with improved sensing capabilities. One-step hydrothermal calcination was used to generate cerium and chromium co-doped carbon quantum dots (Ce/Cr-CQDs), which were then investigated as sensing biomolecules for biological applications. The correlation coefficient(R²) and limit of detection (LOD) were 0.993 and 1.88 µM, respectively, for VitB₁₂ over a concentration range of 3 µM to 50 µM. Real sample analyses were performed with mean recoveries ranging from 97.5 to 99% of physiologically relevant VitB₁₂ for developing Ce/Cr-CQDs based fluorescence sensors/probes. The significant and observable color variations of the CQDs have been effectively coupled to the smartphone app \"RGB color detector,\" and promising results were reproduced.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408554","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":"Fluorescence Enhanced Water-Soluble Ruthenium Complex: Advancing Precision in Cr(VI) Detection and Quantification.","authors":"Pooja Rajagopalan, Sowmiya Saravanan, Mohan Ranganathan, Kalarical Janardhanan Sreeram, Sathyaraj Gopal","doi":"10.1007/s10895-025-04150-z","DOIUrl":"https://doi.org/10.1007/s10895-025-04150-z","url":null,"abstract":"<p><p>The environment and human health are both at risk from the heavy metal chromium (VI), which is extremely toxic and carcinogenic. Chromium (VI) in various matrices must be accurately and quickly detected for both public safety and regulatory compliance. This paper describes the design and development of a novel fluorescence detector suitable for the sensitive and selective quantification of chromium (VI) ions. Utilizing the special qualities of a properly selected fluorophore with high sensitivity and selectivity toward chromium (VI), the suggested ruthenium metal-based fluorescence detector makes use of these advantages. Ruthenium (II) complex of composition [Ru(bpy)₂(PhDORi)]Cl₂ bpy 2,2'-bipyridine, PhDORi (2S,3R)-4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-butane-1,2,3-triol was synthesized. Characterizing the produced chemical has involved analytical and spectroscopic approaches. This complex displayed a broad metal-to-ligand charge transfer band at ~ 457 nm in aqueous solution. Ru(II) complex undergo relatively reversible one-electron oxidation and reduction involving the Ru(II)/Ru(III), according to cyclic voltammetry investigations. In an aqueous solution, the complex exhibits intense fluorescence when the molecule is excited at the MLCT band. The complex exhibit selectivity towards chromate/dichromate anions in the aqueous solution. With ppm to ppb concentration and a linear response across a 10⁵fold concentration range, concentration-dependent emission quenching of the fluorophore by the chromate ions was shown.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408422","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":"Hybrid Materials Based on Reduced Graphene Oxide; Synthesis and Characterization of V and Ru Metal Complexes.","authors":"Mustafa Bal, Mehmet İsa Tontuş, Mehmet Tümer","doi":"10.1007/s10895-025-04184-3","DOIUrl":"https://doi.org/10.1007/s10895-025-04184-3","url":null,"abstract":"<p><p>The unique material graphene, which can find its place in many areas such as pharmaceutical industry, medical field, aviation and space industry, and elimination of environmental pollution; was obtained from graphite using strong oxidants within the scope of this study. rGO was obtained by thermal reduction of oxygen-containing groups in the GO material layer. Hybrid materials were synthesized by binding 4-aminobenzoic acid (C) and 3-aminobenzoic acid (D) to the rGO material. Ru metal complexes, which stand out with their superior photophysical properties, and V metal complexes, which are harmful to the environment and human health, were formed with the hybrid materials. The synthesized hybrid and complex materials were characterized by methods such as FTIR, UV-vis, XRD, SEM and EDX and TEM. In addition, the photoluminescence properties of the materials were analyzed. The potential of Ru and V complexes of the obtained hybrid materials for use in the environment and human health was evaluated.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408551","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":"Rationally Designed Maleimide Dyes for Large Stokes Shifted Solvatochromism and Aggregation-Induced Emission.","authors":"Kirankumar S Gosavi, Aniket Patil, Gopal Wagh, Gunvant H Sonawane, Abhishek Panigrahi, Deepak, Kaushik Pal","doi":"10.1007/s10895-025-04172-7","DOIUrl":"https://doi.org/10.1007/s10895-025-04172-7","url":null,"abstract":"<p><p>Tuning of photophysical characteristics of small molecule fluorophores by simple synthetic method is desired but possesses its own challenges. We are reporting here an easy-to-achieve synthetic strategy to tune N-H maleimide-based fluorescent small molecules 2a-c to achieve large Stokes shifted solvatochromism and aggregation induced emission (AIE) via. π-surface extension. Fluorophore 2a-c exhibit broad solvatochromic emission range from blue to yellow (458 to 568 nm) due to intramolecular charge transfer with incremental large Stokes shift (110 nm to 192 nm) in nonpolar to polar solvent. The introduction of the phenyl ring affects both the electronic conjugation and the facile aggregation in the bad solvent. Along with synthesis, thermal stability and detailed photophysical study of the synthesized fluorophores and study of AIE in the THF/water mixture of a representative probe (2c) is presented. Moreover, the experimental results are well supported by the DFT study.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391044","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 Mini Review on Carbazole Fluoroscent Chemosensors for the Detection of Cu (II) Ion: A Comprehensive Review.","authors":"Qasim Ullah, Aram Rahman, Mohammad Arifuddin, Ira Khan, Nizamul Haque Ansari, Pathan Arif Ali Khan","doi":"10.1007/s10895-024-04079-9","DOIUrl":"https://doi.org/10.1007/s10895-024-04079-9","url":null,"abstract":"<p><p>The first fluorescent chemosensor was introduced by F. Goppelsröder (1867) for the detection of Al (III) ion through the formation of strongly fluorescent chelate of morin ion. This mini review focuses on carbazole derivatives fluorescence for detecting Cu²⁺ ions in aqueous and living systems. Carbazole is an example of heterocyclic compound containing nitrogen atom. Carbazole and its derivatives have been used as fluorescent sensors for the detection of Cu²⁺ ions due to the some inherent features such as high solubility, presence of large conjugated system, active intramolecular charge transfer capability, reasonable thermal resistance, photochemical useful, photoelectric properties, and bioactive efficiencies. These features make carbazole and its derivatives effective for applications in fluorescent sensing, photoelectric devices, dyes, molecular recognition, and pharmaceuticals. Different photophysical mechanisms such as chelation enhanced fluorescence (CHEF), intramolecular charge transfer (ICT), photoinduced electron transfer (PET), aggregation induced emission (AIE) play important role in the detection of Cu²⁺ ions while using fluorescent sensors. This review also highlighted on various methods of synthesis of carbazole in brief. The work done on the applications of carbazole fluorescent during the period 2013 to till date has been summarized in tabular form.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143390893","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":"DFT and Z-scan Studies for the Determination of Nonlinear Optical Susceptibility and Second Order Hyperpolarizability of Ethidium Bromide Dye in Different Solvents.","authors":"C Deepa, A G Bharathi Dileepan, Rohith Ramasamy, Rajadurai Vijay Solomon, Natarajan Arumugam, Abdulrahman I Almansour, Kasireddy Sudarshan, S Jeyaram","doi":"10.1007/s10895-025-04164-7","DOIUrl":"https://doi.org/10.1007/s10895-025-04164-7","url":null,"abstract":"<p><p>Nonlinear optical (NLO) susceptibility of Ethidium Bromide (EB) dye, an excellent NLO material, dissolved in different solvents, including ethanol, methanol, acetone, 1-propanol, DMF, and DMSO is reported. Z-scan tool is used to measure the NLO features of EB dye using open and closed aperture methods. The peak-valley transmittance graph indicating self-defocusing nonlinearity in the nonlinear refractive index of EB dye in different solvents. The nonlinear absorption coefficient showed both positive and negative nonlinearity is the result of saturable and reverse saturable absorption behavior from the open aperture curve. The absorption coefficient and nonlinear refractive index of EB dye in various solvents are found to be the order of 10^-4 m/W and 10^-11 m²/W, respectively. Significant second-order hyperpolarizability and third-order NLO susceptibility are observed in EB dye dissolved in DMSO. The effect of the solvent on the solute molecule is assessed using a multi-parameter scale that considered both specific and non-specific interactions. The investigation of NLO properties of EB dye is carried out using the DFT method at the B3LYP/6-311 + + G(d, p) level to compute the linear polarizability (α), first-order hyperpolarizability (β), and second-order hyperpolarizability (γ) values in different solvents. These theoretical findings are further supported by experimental results, highlighting the solvent-dependent enhancement of NLO properties.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143390987","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":"Template-Assisted Synthesis of Dy³⁺-Doped Bi₂SiO₅ Nanospheres with Excellent Luminescence and Thermal Stability.","authors":"Dongxun Chen, Xulong Lv, Yanjie Liang","doi":"10.1007/s10895-025-04171-8","DOIUrl":"https://doi.org/10.1007/s10895-025-04171-8","url":null,"abstract":"<p><p>In this work, Dy³⁺-doped Bi₂SiO₅ nanoparticles with uniform spherical morphology and narrow size distribution have been successfully synthesized using a facile template-assisted approach. The effects of sintering temperature and Dy³⁺ doping concentration on the phase composition, morphology, and luminescence properties of Bi₂SiO₅:Dy³⁺ nanophosphor are systematically investigated through X-ray diffraction, scanning electron microscopy, and photoluminescence (PL) spectroscopy. X-ray diffraction results confirm that the synthesized Bi₂SiO₅:Dy³⁺ nanospheres exhibit a pure tetragonal phase. Meanwhile, the phosphor particles are composed of monodisperse nanospheres with an average diameter of approximately 265 nm. Upon excitation at 388 nm, intense photoluminescence is noted in the blue (⁴F_9/2→⁶H_15/2) and yellow (⁴F_9/2→⁶H_13/2) spectral regions due to the characteristic emissions of Dy³⁺ ions. Temperature-dependent PL spectra reveal that the optimized Bi₂SiO₅:2.5%Dy³⁺ nanospheres maintain extraordinary luminescence thermal stability, retaining 81.0% of its emission intensity at 423 K compared to 303 K. The phosphor also showed remarkable color stability, with CIE chromaticity coordinates shifting minimally from (0.377, 0.413) at 303 K to (0.373, 0.407) at 423 K. This newly developed Bi₂SiO₅:Dy³⁺ nanospheres exhibit commendable PL properties, enabling them as promising candidates for yellow phosphors in LEDs and display applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391050","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":"Photoluminescence and Decay Kinetic Studies of Eu³⁺ Activated Novel Magnesium Tungstate Double Perovskite for Lighting Application.","authors":"Jitesh Sharma, Naresh Degda, Yashesh Gandhi, K V R Murthy","doi":"10.1007/s10895-025-04148-7","DOIUrl":"https://doi.org/10.1007/s10895-025-04148-7","url":null,"abstract":"<p><p>A red emitting luminescent novel double perovskites magnesium tungstate (Mg₃WO₆) activated with Eu³⁺ were prepared and characterized for structural and photoluminescence (PL) properties. The phosphors were prepared using the standard solid-state reaction (SSR) method, with varying Eu³⁺ concentrations ranging from 1 mol% to 4 mol%. All the phosphor under study were thoroughly examined by utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDAX) analysis for structural and morphological aspects. The Rietveld refinement matching of powder XRD patters confirms the Monoclinic crystalline structure of the phosphor under study. Moreover, the crystallite size is computed using Debye-Scherrer (D-S) formulation. The monoclinic crystallized Mg₃WO₆:Eu³⁺ phosphors show agglomerated surface looking like a cluster of particles, which primarily due to the high-temperature calcination. When excited at 278 nm, 396 nm, and 536 nm excitations, the phosphor series doped with Eu³⁺ exhibited standard PL emission of activator ions. Under all three applied excitations, the phosphors displayed red spectral emission with notably high luminescence intensity for which ⁵D₀-⁷F_J (J = 1 and 2) standard transition of Eu³⁺ ions are responsible. The effect of doping and concentration quenching were investigated and discussed. The decay kinetics of the phosphors were examined using PL decay lifetime measurements for λ_ex = 396 nm and λ_em = 616 nm, and corresponding lifetime was determined. Additionally, the PL quantum efficiency, a key parameter for evaluating the potential of the phosphors, was calculated based on the measured PL decay time using Auzel's model. The CIE color coordinates significantly falling within red region of the CIE diagram, confirming standard color emission and related photometric parameters were determined. As a result, the synthesized phosphor series under investigation found capable in their application in light illumination devices.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391042","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":"The Aggregation and Disaggregation Behavior of Chain Aromatic Hydrocarbon Derivatives Modulated by pH and act as Efficient Fluorescence Quencher for Polycyclic Aromatic Hydrocarbons.","authors":"Weijian Xue, Xiangyu Ling, Huiqian Li, Yuhang Liu, Bing Zhao, Yanbing Yin","doi":"10.1007/s10895-025-04149-6","DOIUrl":"https://doi.org/10.1007/s10895-025-04149-6","url":null,"abstract":"<p><p>In this work, two chain aromatic hydrocarbon derivatives 1-2, which are constructed by linking two 3 H-imidazo[4,5-b]pyridine moieties through phenyls and oxygen bridges, were designed and synthesized. The aggregation and disaggregation behavior of these sensors could be modulated by pH, as evidenced by H¹ NMR, fluorescence spectrum and DLS, attributable to the altered deprotonation of the 3 H-imidazo[4,5-b]pyridine cores. An increase in the sensor concentration leads to the reemergence of aggregation, correspondingly diminishing the fluorescence intensity. Polyaromatic aromatic hydrocarbons (PAHs), known for their luminescent characteristics, demonstrate sustained luminescence even at high concentrations of 10^- 3 M. Notably, the fluorescence of PAHs are effectively quenched upon mixed with 7 × 10^- 5 M aggregated sensor 1 or 10^- 4 M aggregated sensor 2. Aggregation is identified as the predominant mechanism for fluorescence quenching, the finding corroborated by fluorescence spectroscopy and DLS measurements. Based on computational studies and mechanistic evaluations, sensors 1 and 2 emerge as promising candidates for serving as efficient fluorescence quenchers for polycyclic aromatic hydrocarbons.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391061","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}