Journal of Fluorescence最新文献_第6页

Synthesis and Photoluminescence Properties of Eu³⁺ Doped Ba₃Lu₄O₉ Nanomaterials of High Colour Purity for LEDs Applications. 用于led的高色纯Eu3+掺杂Ba3Lu4O9纳米材料的合成及其光致发光性能

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-06 DOI: 10.1007/s10895-025-04338-3

Aarti Khatkar, Dinesh Kumar, Rajesh Kumar, Suman Lata

{"title":"Synthesis and Photoluminescence Properties of Eu3+ Doped Ba3Lu4O9 Nanomaterials of High Colour Purity for LEDs Applications.","authors":"Aarti Khatkar, Dinesh Kumar, Rajesh Kumar, Suman Lata","doi":"10.1007/s10895-025-04338-3","DOIUrl":"https://doi.org/10.1007/s10895-025-04338-3","url":null,"abstract":"Eu3+-doped Ba3Lu4O9 (1-10 mol%) bright red emitters were efficiently produced through an economical solution combustion technique. Phase formation and structural analysis was executed using the obtained specific X-ray diffraction (XRD) patterns. The pure rhombohedral form of Ba3Lu3.8Eu0.2O9 sample with R3(146) space group was achieved by Rietveld refinement analysis. Field emission scanning electron microscope (FE-SEM) as well as transmission electron microscopy (TEM) provides clustered nature of particles in 60-70 nm range. The energy band-gap of host lattice (4.9 eV) and Ba3Lu3.8Eu0.2O9 composition (5.50 eV) lie within the semiconductor range enhancing the area of their application. The existence of Ba, Lu, Eu & O elements in optimum composition (5 mol%) was proved via Electron diffraction studies (EDS). Under 396 nm excitation, the dominant transition 5D0 → 7F2 at 621 nm is obtained which is responsible for red luminescence of Eu3+ ions. The Judd-Ofelt intensity parameters (Ω2 and Ω4) were determined based on the emission intensities corresponding to the 5D0 → 7F2 and 5D0 → 7F4 transitions of the europium (III) ion, respectively. Critical distance for energy transmission among nearby Eu3+ ions was found to be 13.71 Å. However, the colorimetric values of 5-10 mol% samples are very near to red coordinates (0.6667, 0.3333) of standard NTSC color system, and the values of CCT measured by the emission profiles fall in range of 1918 to 2942 K implying the participation of Eu3+ doped nanophosphor in designing warm WLEDs for indoor lighting applications.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144003579","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}

引用次数: 0

Nitrogen-Doped Carbon Dots from Borreria Hispida: For Fluorometric Sensing of VO²⁺ Ions and Live Cell Imaging Applications. 硼掺杂碳点：用于VO2+离子的荧光传感和活细胞成像应用。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-06 DOI: 10.1007/s10895-025-04341-8

S Shanmuga Priya, S R Suseem

{"title":"Nitrogen-Doped Carbon Dots from Borreria Hispida: For Fluorometric Sensing of VO2+ Ions and Live Cell Imaging Applications.","authors":"S Shanmuga Priya, S R Suseem","doi":"10.1007/s10895-025-04341-8","DOIUrl":"https://doi.org/10.1007/s10895-025-04341-8","url":null,"abstract":"This research presents a straightforward approach to synthesizing advanced nanomaterials derived from the herb Borreria Hispida, focusing on their use in environmental and biological applications. Utilizing a simple hydrothermal process, nitrogen-doped carbon dots were produced from Borreria Hispida and ortho-phenylenediamine. Various analytical techniques such as XRD, TEM, FTIR, CHNS, UV-Vis, and photoluminescence spectroscopy were employed to characterize the carbon dots. The synthesized nanomaterials displayed exceptional water solubility and robust UV light stability, coupled with a high quantum yield of 9%. With particle sizes ranging from 0.5 to 3.5 nm, the carbon dots demonstrated superior sensitivity and selectivity in detecting VO2+ ions through a fluorometric sensing mechanism, achieving a detection limit as low as 0.25 µM. The sensing mechanism was based on a binding model where two nitrogen atoms from the carbon dots interact with a single VO2+ ion in a 2:1 ratio. Additionally, cytotoxicity tests revealed that the N-CDs significantly inhibited the growth of MCF7 breast cancer cells, with cell viability reaching a maximum of 92%. This research highlights the versatility of N-CDs in both environmental monitoring and biomedical fields.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143983442","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}

引用次数: 0

Exploring New Azobenzene Type Photoswitches by Machine Learning with Lowest Possible Fluorescence Excitons with Ease of Synthesis. 利用机器学习探索具有最低荧光激子且易于合成的新型偶氮苯型光开关。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-06 DOI: 10.1007/s10895-025-04336-5

Azal S Waheeb, Duha M Hasan, Shaimaa H Mallah, Sajjad H Sumrra, Sadaf Noreen, Ashraf Y Elnaggar, Abrar U Hassan, Islam H El Azab, Hussein A K Kyhoiesh, Mohamed H H Mahmoud

{"title":"Exploring New Azobenzene Type Photoswitches by Machine Learning with Lowest Possible Fluorescence Excitons with Ease of Synthesis.","authors":"Azal S Waheeb, Duha M Hasan, Shaimaa H Mallah, Sajjad H Sumrra, Sadaf Noreen, Ashraf Y Elnaggar, Abrar U Hassan, Islam H El Azab, Hussein A K Kyhoiesh, Mohamed H H Mahmoud","doi":"10.1007/s10895-025-04336-5","DOIUrl":"https://doi.org/10.1007/s10895-025-04336-5","url":null,"abstract":"Current investigation presents the design and analysis of 299 azobenzene photoswitches (PSs) for their lowest possible π→ π* transition energies along with their predicted emission maxima values through machine learning (ML) analysis. Their π→ π* transitions related wavelength is calculated by Erying equation to reveal its range up to 256 nm. Their Synthetic Accessibility Likelihood Index (SALI) indicates that a substantial number of them can be synthesized with ease. Among various tested ML model, eXtream Gradient Boosting (XGBoost) regression models demonstrates its high accuracy by achieving an R² value of 0.87. Their designed molecular descriptors show its Maximum Electrotopological State Index (MaxEStateIndex) to impact the model most. For its emission wavelengths, the random forest regression model yields its promising results with its R2 of 0.92 and a Mean Squared Error (MSE) of 0.38. Its SHAP value reveals the top contributing descriptors being Estate_VSA5, NumValenceElectrons, Estate_VSA3, Chi0n, Chi1v, PEOE_VSA9, Chi0v, and VSA_Estate2. This work not only expands the library of azobenzene PSs but also enhances their understanding of their electronic properties for their future applications in materials science.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143968194","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}

引用次数: 0

A Perylene-Based Bright Red-Emitting Probe for Wash-Free Cell Plasma Membrane Imaging Via Excimer Formation. 一种基于苝的亮红色探针，用于通过准分子形成的无水洗细胞膜成像。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-06 DOI: 10.1007/s10895-025-04315-w

Mingshu Wu, Yongling Zheng, Ziwen Yan, Junying Ma, Siqi Fan, Enju Wang

引用次数: 0

Sensitive Optical Detection of Cyanide and Al(III) Ions and Development of a Simple Colourimetric Method for Estimation of Cyanide in Cassava Flour. 木薯粉中氰化物和Al（III）离子的灵敏光学检测及简便比色法测定。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-05 DOI: 10.1007/s10895-025-04348-1

V Dharaniprabha, Kuppanagounder P Elango

{"title":"Sensitive Optical Detection of Cyanide and Al(III) Ions and Development of a Simple Colourimetric Method for Estimation of Cyanide in Cassava Flour.","authors":"V Dharaniprabha, Kuppanagounder P Elango","doi":"10.1007/s10895-025-04348-1","DOIUrl":"https://doi.org/10.1007/s10895-025-04348-1","url":null,"abstract":"This endeavour's novel Schiff base VDP3 is a fruitful candidate for colourimetric/fluorometric detection of cyanide and fluorometric detection of Al(III) ions in a 50% aqua-organic medium. The prompt naked eye colour change (yellow to orange) and noteworthy fluorescence enhancement of VDP3 in the presence of CN- avowed that VDP3 was an exemplary probe for detecting CN- with a low detection limit of 0.4 µM. The NMR studies infer that deprotonation followed by nucleophilic addition is the probable sensing mechanism for detecting CN- by VDP3. The faint fluorescence of VDP3 was owing to the photoinduced electron transfer (PET), and the nucleophilic addition of CN- intervenes with the PET and consequently enhances the fluorescence significantly. The VDP3 selectively detects Al(III) by forming the chelate octahedral complex [Al(VDP3)(H2O)3] as witnessed by the 27Al-NMR, 1H-NMR, and mass spectral studies with a LOD of 0.14 µM. The striking fluorescent enhancement for VDP3 + Al(III) was ascribed to the collective impacts of PET-CHEF mechanisms (PET-OFF/CHEF-ON). The experimental findings and expected sensing mechanism for detecting CN- and Al(III) were upheld by the computational studies, and they provide robust evidence for the PET ON and PET OFF mechanisms to explain the fluorescence enhancement behaviour further. The VDP3 was proficiently applied for quantitatively estimating CN- and Al(III) in real-world samples. Additionally, VDP3 was effectively utilised for the qualitative and quantitative assessment of cyanide in cassava flour through a simple and convenient colourimetric method without any complex instruments.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143995315","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}

引用次数: 0

Correction: Ultrasensitive Fluorimetric Detection of Hg²⁺ Using a Thiourea-Based Chemosensor. 修正：使用基于硫脲的化学传感器对Hg2+进行超灵敏荧光检测。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-02 DOI: 10.1007/s10895-025-04352-5

Sikandar Khan, Mian Muhammad, Eid H Alosaimi, Hamed M Al-Saidi, Jari S Algethami, Mohsen A M Alhamami

引用次数: 0

Advances in Organic Synthesis and Properties Based On Tetraphenylimidazole Derivatives. 基于四苯基咪唑衍生物的有机合成及其性能研究进展。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-02 DOI: 10.1007/s10895-025-04328-5

Huibin Huang, Yang Li, Can Zeng, Jiali Chen, Ming Liu, Hanqing Wu

引用次数: 0

A Novel Green Synthesis Method for the Preparation of Highly Fluorescent Carbon Dots for Security Ink Applications. 一种新型绿色合成方法制备高荧光碳点用于安全油墨。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-02 DOI: 10.1007/s10895-025-04334-7

A J Athulprasad, S Rekha, M Ramya, Rajita Ramanarayanan

{"title":"A Novel Green Synthesis Method for the Preparation of Highly Fluorescent Carbon Dots for Security Ink Applications.","authors":"A J Athulprasad, S Rekha, M Ramya, Rajita Ramanarayanan","doi":"10.1007/s10895-025-04334-7","DOIUrl":"https://doi.org/10.1007/s10895-025-04334-7","url":null,"abstract":"Environmentally benign biosynthesized carbon dots with diverse chemical and physical properties play an important role in today's scientific research. In the present study, a new approach utilizing dye extraction from betel leaf, followed by a rapid, additive-free dye-derived-hydrothermal process, to synthesize carbon dots with a high quantum yield. The synthesized carbon dots were characterized using UV-visible, Photoluminescence (PL), Fourier transform infrared (FTIR), Raman, and X-ray photoelectron spectroscopy. The UV-visible spectrum of the carbon dot exhibited two major peaks at 233 nm and 294 nm and a tail continuing into the value 342 nm corresponding to π→π* and n→π* transitions. The PL spectra for different excitation wavelengths exhibit a broad peak at 465 nm, attributed to the carbon dot's surface defect state. FTIR spectra confirmed the presence of various functional groups present in the sample. The formation of carbon dots with an average diameter of 3.4 nm was confirmed by transmission electron microscopy (TEM) images. Energy-dispersive X-ray (EDAX) analysis showed the presence of elements C and O in the prepared sample. The synthesized carbon dots with low toxicity, strong fluorescence, and excellent photostability demonstrate immense potential as biocompatible fluorescent ink in future security applications.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144019099","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}

引用次数: 0

Carbazole-Based Colorimetric and Fluorescent Chemosensors for Metal Ions Detection : A Comprehensive Review ( 2012 to till date ). 基于卡巴唑的金属离子检测比色和荧光化学传感器：综合综述（2012年至今）。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-02 DOI: 10.1007/s10895-025-04142-z

Qasim Ullah, Aram Rahman, Anzar Jahan, Ira Khan, Mohammad Faraz Ahmer, Pathan Arif Ali Khan

{"title":"Carbazole-Based Colorimetric and Fluorescent Chemosensors for Metal Ions Detection : A Comprehensive Review ( 2012 to till date ).","authors":"Qasim Ullah, Aram Rahman, Anzar Jahan, Ira Khan, Mohammad Faraz Ahmer, Pathan Arif Ali Khan","doi":"10.1007/s10895-025-04142-z","DOIUrl":"https://doi.org/10.1007/s10895-025-04142-z","url":null,"abstract":"This review focuses on the development of carbazole based colorimetric and fluorescent chemosensors for the detection of metal ions including, mercury (Hg), iron (Fe), aluminium (Al) chromium (Cr) zinc (Zn), cobalt (Co) and copper (Cu) ions detection. Traditional analytical methods for detecting these metal ions, while widely used, present several draw backs such as high cost, low sensitivity, time consuming and the requirement for skilled technician. To overcome these limitations, more efficient alternatives such as colorimetric and fluorescent chemosensors have been developed. These sensors offer advantages like cost effectiveness, high sensitivity, rapid detection, and ease of use without requiring specialized technical expertise. In this review, we emphasize the applications of carbazole based colorimetric and fluorescence chemosensors. Carbazole and its derivatives are well-suited for this purpose due to their unique properties including excellent solubility, a highly conjugated structure, chemical stability, intramolecular charge transfer capabilities, and sensitivity to structural changes. These features make them ideal candidates for use as optical materials and fluorescence chemosensors in metal ion detection. The applications of carbazole- based colorimetric and fluorescent chemosensors. are summarized in tabular format for clarity.","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144022109","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}

引用次数: 0

Applications of Multicolor Light-Emitting Devices Fabricated Using Tricolor Plastic Scintillators in LED Lighting, X-ray Detection, and Imaging. 三色塑料闪烁体制造的多色发光器件在LED照明、x射线探测和成像中的应用。

IF 2.6 4区化学

Journal of Fluorescence Pub Date : 2025-05-02 DOI: 10.1007/s10895-025-04346-3

Biwu Liu, Xiaoxiao Zhang, Feng Ding, Yulin Chen, Jie Zhou, Benli Yu, Siqi Li, Zhijia Hu

引用次数: 0