Methods and Applications in Fluorescence最新文献_第9页

3-aminoquinoline: a turn-on fluorescent probe for preferential solvation in binary solvent mixtures 3-氨基喹啉：一种用于二元溶剂混合物中优先溶剂化的开启荧光探针

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-06-13 DOI: 10.1088/2050-6120/ac784d

Sharmistha Das, Shirsendu Das, A. Singh, A. Datta

{"title":"3-aminoquinoline: a turn-on fluorescent probe for preferential solvation in binary solvent mixtures","authors":"Sharmistha Das, Shirsendu Das, A. Singh, A. Datta","doi":"10.1088/2050-6120/ac784d","DOIUrl":"https://doi.org/10.1088/2050-6120/ac784d","url":null,"abstract":"3-Aminoquinoline (3AQ) has been used as a fluorescent probe for preferential solvation in hexane-ethanol solvent mixtures. Results of the present experiment have been put into context by comparison with prior observations with 5-aminoquinoline (5AQ) as the probe. 3AQ exhibits a relatively small change of dipole moment (Δμ = 2.2 D) upon photoexcitation, compared to 5AQ (Δμ = 6.1D), which might appear to be a hindrance in the way of its use as a solvation probe. Indeed, the values of parameters like spectral shifts are smaller for the present experiment with 3AQ. At the smallest concentration of alcohol used, its local mole fraction around the probe is significantly lower than in the previous experiments with 5AQ. However, these apparent disadvantages are outweighed by the significant increase in fluorescence intensity and lifetime observed with increasing concentration of ethanol in the solvent mixture, as opposed to the drastic fluorescence quenching that occurs for 5AQ. This is a marked advantage in the use of 3AQ in studies like the present one. The local mole fraction of ethanol and preferential solvation index experienced by 3AQ are in line with those reported for 5AQ. The disadvantage of the smaller magnitude of Δμ persists in the time resolved fluorescence experiments, for solvent mixtures with very low ethanol content. Negligible wavelength dependence of fluorescence transients of 3AQ is observed for x p = 0.002,. However, this effect is outweighed at higher alcohol concentrations, for which nanosecond dynamics of preferential solvation is observed.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44887679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Two near-infrared fluorescent probes based on dicyanoisfluorone for rapid monitoring of Zn2+ and Pb2+ 基于二氰芴酮的两种近红外荧光探针快速监测Zn2+和Pb2+

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-19 DOI: 10.1088/2050-6120/ac7199

Jia Li, Cuiping Zhou, Hong Yang, Xiongzhi Wu, Liqiang Yan

{"title":"Two near-infrared fluorescent probes based on dicyanoisfluorone for rapid monitoring of Zn2+ and Pb2+","authors":"Jia Li, Cuiping Zhou, Hong Yang, Xiongzhi Wu, Liqiang Yan","doi":"10.1088/2050-6120/ac7199","DOIUrl":"https://doi.org/10.1088/2050-6120/ac7199","url":null,"abstract":"Zinc (Zn2+) and lead (Pb2+) ions in the environment have important effects on human health and environmental safety. Therefore, it is necessary to effectively detect them by a convenient and reliable analysis method. In this study, two near-infrared fluorescent probes for the fast determination of Zn2+ and Pb2+ were synthesized by a simple Schiff base reaction between the dicyanoisophorone skeleton and carbohydrazide derivatives. Among them, the probe with the thiophene-2-carbohydrazide group showed a selective fluorescence response to Zn2+ and Pb2+ with a maximum emission wavelength of 670 nm. And the detection limits of the probe for Zn2+ and Pb2+ were 1.59 nM and 1.65 nM, respectively. In contrast the probe modified by the furan-2-carbohydrazide group achieved quantitative detection of Zn2+, with a detection limit of 2.7 nM. These results were attributed to the fact that the probes bind to Zn2+ and Pb2+ in stoichiometric ratios of 1:1, blocking the intramolecular PET effect. Furthermore, these two probes can be recycled through the action of EDTA and have been successfully used to detect Zn2+ and Pb2+ in real water samples.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46908505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

A novel reversible fluorescent probe for Cu2+ and S2− ions and imaging in living cells 一种新型可逆的Cu2+和S2−离子荧光探针及其在活细胞中的成像

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-19 DOI: 10.1088/2050-6120/ac719a

Shuaici Cheng, Ran Sun, Zhuo-Hui Wu, Huihui Mei, Haocheng Yang, Qingqing Kong, Kuoxi Xu

引用次数: 3

Construction of fluorescent logic gates for the detection of mercury(II) and ciprofloxacin based on phycocyanin 基于藻蓝蛋白的汞和环丙沙星荧光逻辑门的构建

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-18 DOI: 10.1088/2050-6120/ac7123

Han Dong, Mogos Girmatsion, Ruoyu Wang, Gang Lu, Yunfei Xie, Yahui Guo, H. Qian, Weirong Yao

引用次数: 0

Fluorescence intensity ratio technique and its reliability 荧光强度比技术及其可靠性

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-17 DOI: 10.1088/2050-6120/ac70ab

Vishab Kesarwani, V. K. Rai

引用次数: 9

Vacuum ultraviolet photoluminescence of NaMgF3:Sm and NaMgF3:Sm,Ce: energy levels of the lanthanides in NaMgF3:Ln compounds NaMgF3:Ln化合物中镧系元素的真空紫外光致发光研究

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-17 DOI: 10.1088/2050-6120/ac70aa

J. Schuyt, G. Williams, K. Shinohara, T. Shimizu, K. Yamanoi, M. Cadatal-Raduban

{"title":"Vacuum ultraviolet photoluminescence of NaMgF3:Sm and NaMgF3:Sm,Ce: energy levels of the lanthanides in NaMgF3:Ln compounds","authors":"J. Schuyt, G. Williams, K. Shinohara, T. Shimizu, K. Yamanoi, M. Cadatal-Raduban","doi":"10.1088/2050-6120/ac70aa","DOIUrl":"https://doi.org/10.1088/2050-6120/ac70aa","url":null,"abstract":"The luminescence properties of NaMgF3:Sm and NaMgF3:Ce,Sm were studied in the vacuum ultraviolet spectral region. Excitation bands corresponding to the charge transfer processes F− → Sm3+, O2− → Sm3+, and O2− → Ce3+, and the energy transfer processes Ce3+ → Sm3+ and O2− → Sm3+, were observed. The energies of the Sm3+ charge transfer transitions and the crystal field split Ce3+ 4f 05d 1 transitions were used to construct a complete host referred binding energy diagram for the series of lanthanide-doped NaMgF3:Ln compounds. We demonstrate that the optical and luminescence properties predicted by the binding energy diagram are in good agreement with those predicted by the binding energy diagram constructed via the alternative impurity-informed method, and all available experimental data regarding the NaMgF3:Ln compounds. We demonstrate that NaMgF3:Ln compounds are model systems for the study of charge trapping phenomena and divalent lanthanide luminescence. Ultimately, we validate that the impurity-informed method can be used to establish the energy levels of lanthanides in fluoride systems.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48439118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

A cuvette-compatible Zn2+ sensing tool for conventional spectrofluorometers prepared by copolymerization of macrocyclic fluoroionophores on quartz glass surface 石英玻璃表面大环氟离子载体共聚制备的用于常规荧光光谱仪的比色杯兼容Zn2+传感工具

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-11 DOI: 10.1088/2050-6120/ac6ecb

Ádám Golcs, Korinna Kovács, Panna Vezse, L. Bezúr, P. Huszthy, T. Tóth

{"title":"A cuvette-compatible Zn2+ sensing tool for conventional spectrofluorometers prepared by copolymerization of macrocyclic fluoroionophores on quartz glass surface","authors":"Ádám Golcs, Korinna Kovács, Panna Vezse, L. Bezúr, P. Huszthy, T. Tóth","doi":"10.1088/2050-6120/ac6ecb","DOIUrl":"https://doi.org/10.1088/2050-6120/ac6ecb","url":null,"abstract":"We report here the development of a surface-modified quartz glass sheet, which affords an opportunity for converting conventional spectrofluorometers to ion-selective optochemical sensors by placing it diagonally into a photometric cuvette. Moreover, we describe a generalizable technique, which allows the usage of any polymerizable ionophores for developing multiple-use fluorescent chemosensors of various selectivity. A fluorescent bis(acridino)-crown ether containing allyl groups was photocatalytically copolymerized with a methacrylate-acrylamide-based monomer mixture to obtain an ion-selective sensor membrane layer on the surface of the cuvette-compatible glass sheet. This glass membrane-based direct optode enabled the analysis of Zn2+ above a lower limit of detection of 2.2 × 10–7 mol·l−1 with an excellent reusability. Limiting factors, like pH and competing ionic or organic agents were thoroughly investigated. Moreover, spiked river-water samples were measured to demonstrate applicability. The proposed sensor placed in any conventional spectrofluorometer provides an innovative method for perturbation-free analysis of Zn2+ for all the chemists in need of a fast, easy-to-use, portable and regenerable analyzer without the requirement of an analyte-specific instrumentation.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48692897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 1

A highly selective and sensitive ratiometric fluorescent probe for quantitative detection of Al(III) in different natural matrices 一种高选择性、高灵敏度的比率荧光探针用于不同天然基质中Al（III）的定量检测

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-05-11 DOI: 10.1088/2050-6120/ac6eca

R. Shanmugapriya, P. S. Kumar, C. Nandhini, K. Satheeshkumar, K. Vennila, K. Elango

{"title":"A highly selective and sensitive ratiometric fluorescent probe for quantitative detection of Al(III) in different natural matrices","authors":"R. Shanmugapriya, P. S. Kumar, C. Nandhini, K. Satheeshkumar, K. Vennila, K. Elango","doi":"10.1088/2050-6120/ac6eca","DOIUrl":"https://doi.org/10.1088/2050-6120/ac6eca","url":null,"abstract":"A highly selective and sensitive assay of Al(III) using ratiometric fluorescence enhancement is reported in an aqueous solution. The probe (named RS5) exhibits a red-shift of 54 nm upon binding with Al(III) ion. The significant enhancement response of RS5 at 481 nm is attributed to the formation of a 1:1 complex between the probe and Al(III), wherein RS5 acts as a tridentate NNN-donor ligand. The complexation process is ascertained by 1H, 13C, and 27Al NMR and HR-MS spectral techniques. The binding constant of the complex is determined to be 1.3 × 105 M−1. The ratiometric change in fluorescence upon complexation with Al(III) is ascribed to an increase in intramolecular charge transfer (ICT) transition along with chelation enhanced fluorescence (CHEF) processes. The probe can be applied for monitoring Al(III) in a pH range of 6–8. The limit of detection (LOD) of RS5 for the examination of Al(III) is found to be 0.3 μM. With an aim to understand the sensing behavior of RS5, the optical properties of the probe and its Al(III) complex are investigated using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) methods. The probe is successfully employed for the determination of Al(III), with very high recovery percentages, in natural matrices like deep well water, tap water, drinking water, pond water, river water, bovine serum albumin (BSA) solution and blood serum.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43641658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

A novel AIEE active anti-B18H22 derivative-based Cu2+ and Fe3+ fluorescence off-on-off sensor 一种新型AIEE活性抗B18H22衍生物Cu2+和Fe3+荧光开关传感器

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-04-28 DOI: 10.1088/2050-6120/ac6b88

Linli Xiong, Yong Zheng, Haibo Wang, Jiangyang Yan, Xuguang Huang, Hongyun Meng, Chunhua Tan

{"title":"A novel AIEE active anti-B18H22 derivative-based Cu2+ and Fe3+ fluorescence off-on-off sensor","authors":"Linli Xiong, Yong Zheng, Haibo Wang, Jiangyang Yan, Xuguang Huang, Hongyun Meng, Chunhua Tan","doi":"10.1088/2050-6120/ac6b88","DOIUrl":"https://doi.org/10.1088/2050-6120/ac6b88","url":null,"abstract":"A novel fluorescence sensor for successive detection of Cu2+ and Fe3+ based on anti-B18H22 derivative which possesses 5-hydroxyisoquinoline as an ionophore was synthesized via a one-pot and its structure and photophysical properties were characterized by NMR, HRMS, FTIR, UV–vis, PL and theoretical calculation. The fluorophore displays two emission peaks at 460 nm and 670 nm in THF solution coming from the emission of the locally excited state and intramolecular charge transfer fluorescence, respectively. The complex exhibited obvious aggregation-induced emission enhancement (AIEE) characteristics in THF/H2O solution by increasing the aqueous concentration from 70% to 95%. The AIEE molecules showed a high selectivity towards Cu2+ over other metal ions by forming a 2:1 metal-to-ligand complex in THF/H2O (fw = 20%) solution, the fluorescence intensity increased as a linear function of the Cu2+ concentration at 460 nm due to the inhibition of PET effect. The fluorescent emission was quenched linearly by the addition of Fe3+, which provides a method for successive determination of Cu2+ and Fe3+ based on ‘off-on-off’ fluorescence of the fluorescent. The detection limit of Cu2+ and Fe3+ was 5.7 × 10−6 M and 7.2 × 10−5 M respectively. Morever, a rapid identification of Cu2+ in the aqueous solution by naked eyes can be realized. In addition, the molecules were pH-sensitive, the fluorescence quenching can be observed in strongly alkaline environment. The method has been applied to the determination of copper ions in water samples with satisfactory results.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43138010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 3

Review on long afterglow nanophosphors, their mechanism and its application in round-the-clock working photocatalysis 综述了长余辉纳米荧光粉及其机理及其在全天候工作光催化中的应用

IF 3.2 3区化学

Methods and Applications in Fluorescence Pub Date : 2022-04-28 DOI: 10.1088/2050-6120/ac6b87

Dipti Bidwai, Niroj Kumar Sahu, S. J. Dhoble, Ashutosh Mahajan, D. Haranath, G. Swati

{"title":"Review on long afterglow nanophosphors, their mechanism and its application in round-the-clock working photocatalysis","authors":"Dipti Bidwai, Niroj Kumar Sahu, S. J. Dhoble, Ashutosh Mahajan, D. Haranath, G. Swati","doi":"10.1088/2050-6120/ac6b87","DOIUrl":"https://doi.org/10.1088/2050-6120/ac6b87","url":null,"abstract":"Semiconductor assisted photocatalysis is one of the most efficient methods for the degradation of complex organic dyes. A major limiting factor of semiconductor assisted photocatalysis is the requirement of a continuous source of light to perform a redox reaction. One of the upcoming solutions is photon energy-storing long afterglow/persistent phosphors. They are an unusual kind of rechargeable, photon energy capturing/trapping phosphors that can trap charge carriers (electrons/holes) in their meta-stable energy levels, thereby resulting in persistent luminescence. Persistence luminescence from such materials can range from minutes to hours. The coupling of long afterglow phosphors (LAP) with the conventional semiconductor is a promising way to support the photocatalytic process even in dark. In addition, dissimilar band structures of LAPs and semiconductor results in formation of heterojunction which further suppresses the recombination of charge. Such an encouraging idea of LAP for round-the-clock working photocatalytic system is in its premature stage; which is required to be investigated fully. Thus, we present a state-of-art review on the potential materials for assisting round-the-clock photocatalysis, trapping-detrapping mechanism in LAP materials, fabrication strategies and their associated characterization tools. Review also covers LAP materials and their photocatalytic mechanism briefly.","PeriodicalId":18596,"journal":{"name":"Methods and Applications in Fluorescence","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47808257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 2