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Статті в журналах з теми "Fluorescence sensing"

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Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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1

Montali, Chiara, Stefania Abbruzzetti, Arne Franzen, Giorgia Casini, Stefano Bruno, Pietro Delcanale, Sandra Burgstaller, et al. "Nitric Oxide Sensing by a Blue Fluorescent Protein." Antioxidants 11, no. 11 (November 11, 2022): 2229. http://dx.doi.org/10.3390/antiox11112229.

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S-Nitrosylation of cysteine residues is an important molecular mechanism for dynamic, post-translational regulation of several proteins, providing a ubiquitous redox regulation. Cys residues are present in several fluorescent proteins (FP), including members of the family of Aequorea victoria Green Fluorescent Protein (GFP)-derived FPs, where two highly conserved cysteine residues contribute to a favorable environment for the autocatalytic chromophore formation reaction. The effect of nitric oxide on the fluorescence properties of FPs has not been investigated thus far, despite the tremendous role FPs have played for 25 years as tools in cell biology. We have examined the response to nitric oxide of fluorescence emission by the blue-emitting fluorescent protein mTagBFP2. To our surprise, upon exposure to micromolar concentrations of nitric oxide, we observed a roughly 30% reduction in fluorescence quantum yield and lifetime. Recovery of fluorescence emission is observed after treatment with Na-dithionite. Experiments on related fluorescent proteins from different families show similar nitric oxide sensitivity of their fluorescence. We correlate the effect with S-nitrosylation of Cys residues. Mutation of Cys residues in mTagBFP2 removes its nitric oxide sensitivity. Similarly, fluorescent proteins devoid of Cys residues are insensitive to nitric oxide. We finally show that mTagBFP2 can sense exogenously generated nitric oxide when expressed in a living mammalian cell. We propose mTagBFP2 as the starting point for a new class of genetically encoded nitric oxide sensors based on fluorescence lifetime imaging.

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2

Murfin, Lloyd C., and Simon E. Lewis. "Azulene—A Bright Core for Sensing and Imaging." Molecules 26, no. 2 (January 12, 2021): 353. http://dx.doi.org/10.3390/molecules26020353.

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Azulene is a hydrocarbon isomer of naphthalene known for its unusual colour and fluorescence properties. Through the harnessing of these properties, the literature has been enriched with a series of chemical sensors and dosimeters with distinct colorimetric and fluorescence responses. This review focuses specifically on the latter of these phenomena. The review is subdivided into two sections. Section one discusses turn-on fluorescent sensors employing azulene, for which the literature is dominated by examples of the unusual phenomenon of azulene protonation-dependent fluorescence. Section two focuses on fluorescent azulenes that have been used in the context of biological sensing and imaging. To aid the reader, the azulene skeleton is highlighted in blue in each compound.

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3

Liu, Mingxian, Fenglin Tang, Zhengli Yang, Jing Xu, and Xiupei Yang. "Recent Progress on Gold-Nanocluster-Based Fluorescent Probe for Environmental Analysis and Biological Sensing." Journal of Analytical Methods in Chemistry 2019 (January 2, 2019): 1–10. http://dx.doi.org/10.1155/2019/1095148.

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Gold nanoclusters (AuNCs) are one of metal nanoclusters, which play a pivotal role in the recent advances in the research of fluorescent probes for their fluorescence effect. They are favored by most researchers due to their strong stability in fluorescence and adjustability in fluorescence wavelength when compared to traditional organic fluorescent dyes. In this review, we introduce various synthesis strategies of gold-nanocluster-based fluorescent probes and summarize their application for environmental analysis and biological sensing. The use of gold-nanocluster-based fluorescent probes for the analysis of heavy metals and inorganic and organic pollutants is covered in the environmental analysis while biological labeling, imaging, and detection are presented in biological sensing.

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4

Birch, David J. S., Ashok Ganesan, and Jan Karolin. "Metabolic sensing using fluorescence." Synthetic Metals 155, no. 2 (November 2005): 410–13. http://dx.doi.org/10.1016/j.synthmet.2005.09.025.

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5

Jayaraman, Jayabharathi, and Jayamoorthy Karunamoorthy. "Sensing Nanoparticulate ZnO with Benzimidazole Derivative by Fluorescence." Key Engineering Materials 543 (March 2013): 63–67. http://dx.doi.org/10.4028/www.scientific.net/kem.543.63.

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A sensitive benzimidazole derivative fluorescent sensor for nanoparticulate ZnO has been designed and synthesized. The nanocrystalline ZnO, Ag doped ZnO and Cu doped ZnO have been synthesised by sol-gel method and characterized by powder X-ray diffraction, scanning electron microscopy (SEM) and UV-visible diffuse reflectance, photoluminescence and electrochemical impedance spectroscopies. The synthesized sensor emits fluorescence at 360 nm and this fluorescence is selectively enhanced by nanocrystalline ZnO. This technique is sensitive to detect and estimate ZnO at micro molar level. Impurities such as Ag and Cu do not hamper the sensitivity of this technique significantly. Keywords: Sensor, SEM, EDX, Impedance, Fluorescence

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6

Zhang, Zhong, Xin Ma, Bowei Li, Jia Zhao, Ji Qi, Guoying Hao, Rong Jianhui, and Xingbin Yang. "Fluorescence detection of 2,4-dichlorophenoxyacetic acid by ratiometric fluorescence imaging on paper-based microfluidic chips." Analyst 145, no. 3 (2020): 963–74. http://dx.doi.org/10.1039/c9an01798d.

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7

Szablewski, Marek, Richard L. Thompson, and Lars-Olof Pålsson. "Modulated Fluorescence in LB Films Based on DADQs—A Potential Sensing Surface?" Molecules 27, no. 12 (June 17, 2022): 3893. http://dx.doi.org/10.3390/molecules27123893.

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Novel fluorescent Langmuir-Blodgett (LB) films have been constructed from three different amphiphilic dicynaoquinodimethanes (DADQs). The DADQs varied in functional group structure, which had an impact on the LB film structure and the fluorescence properties. As the fluorescence of DADQs competes with non-radiative decay (conformational change), the packing and/or free volume in the LB film will influence the average fluorescence lifetime and integrated intensity. The pristine (blank) LB films were then exposed to a selection of non-fluorescent target analytes (some with environmental relevance) and the fluorescence was measured and analyzed relative to the pristine LB film. Exposure of the LB films to selected target analytes results in a modulation of the fluorescence, both with respect to average fluorescence lifetime and integrated intensity. The modulation of the fluorescence is different for different DADQ LB films and can be attributed to restricted non-radiative decays or charge transfer reactions between target analyte and DADQ LB film. The response from the DADQ LB films shows that these systems can be developed into sensing surfaces based on fluorescence measurements.

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8

Zhu, Jin-Long, Peizhi Zhu, Hai-Tao Chen, Min Yan, and Kou-Lin Zhang. "Distinct solvent-dependent luminescence sensing property of a newly constructed Cu(ii)–organic framework." CrystEngComm 23, no. 9 (2021): 1929–41. http://dx.doi.org/10.1039/d0ce01724h.

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The distinct solvent-dependent fluorescence sensing behavior of an extremely rare Cu(ii) MOF, showing the fluorescent “turn-off” sensing of Fe³⁺ and HCO₃⁻ in DMF and “turn-on” sensing of Al³⁺ in water.

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9

Du, Chenxu, Chaoqun Ma, Jiao Gu, Lei Li, and Guoqing Chen. "Fluorescence Sensing of Caffeine in Tea Beverages with 3,5-diaminobenzoic Acid." Sensors 20, no. 3 (February 3, 2020): 819. http://dx.doi.org/10.3390/s20030819.

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A rapid, selective and sensitive method for the detection of caffeine in tea infusion and tea beverages are proposed by using 3,5-diaminobenzoic acid as a fluorescent probe. The 3,5-diaminobenzoic acid emits strong fluorescence around 410 nm under the excitation of light at 280 nm. Both the molecular electrostatic potential analysis and fluorescent lifetime measurement proved that the existence of caffeine can quench the fluorescence of 3,5-diaminobenzoic acid. Under the optimal experimental parameters, the 3,5-diaminobenzoic acid was used as a fluorescent probe to detect the caffeine aqueous solution. There exists a good linear relationship between the fluorescence quenching of the fluorescent probe and the concentration of caffeine in the range of 0.1–100 μM, with recovery within 96.0 to 106.2%, while the limit of detection of caffeine is 0.03 μM. This method shows a high selectivity for caffeine. The caffeine content in different tea infusions and tea beverages has been determined and compared with the results from HPLC measurement.

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10

Zhang, Miao, Zhang, Liu, Gong, Li, Cui, et al. "Development of a Surface Plasmon Resonance and Fluorescence Imaging System for Biochemical Sensing." Micromachines 10, no. 7 (July 1, 2019): 442. http://dx.doi.org/10.3390/mi10070442.

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Surface plasmon resonance (SPR) biosensors are an extremely sensitive optical technique used to detect the changes in refractive index occurring at the sensor interface. Fluorescence involves the emission of light by a substance that has absorbed light or other electromagnetic radiation, and the parameters of the absorbed and emitted radiation are used to identify the presence and the amount of specific molecules in a specimen. SPR biosensors and fluorescence analysis are both effective methods for real-time detection. The combination of these technologies would improve the quantitative detection sensitivity of fluorescence analysis and the specificity of SPR detection. We designed and developed an SPR and fluorescence synchronous detection system. The SPR module was based on two kinds of modulation methods, and the fluorescence module was capable of switching between four wavelengths. The fluorescence microspheres and A549 cells of different concentration were both detected by the SPR and fluorescence method synchronously in real time. The fluorescent signal and the optical signal of the SPR were shown to correlate. The correlation coefficient for fluorescent microspheres detection reached up to 0.9866. The system could be used in cell analysis and molecule diagnosis in the future.

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11

Toda, Masaya, Yoshihiko Kondo, Tomohiro Niimi, Yutaka Higuchi, Ken Endo, and Fumio Hamada. "Synthesis of Fluorescent Molecular Sensory System for Endocrine Disruptors Based on Dansylthiacalix[6]arenes." Collection of Czechoslovak Chemical Communications 69, no. 6 (2004): 1381–94. http://dx.doi.org/10.1135/cccc20041381.

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Анотація:

Flexible fluorescent hosts, mono-, di- and tridansyl-modified tert-butylthiacalix[6]arenes (TC[6]A-1, TC[6]A-2 and TC[6]A-3, respectively) and didansyl-tert-butylcalix[6]arene (C[6]A-2) have been synthesized in order to investigate their fluorescent chemosensor functionality, which detects endocrine disruptors. The hosts, TC[6]A-1, TC[6]A-2, TC[6]A-3 and C[6]A-2 exhibit pure monomer fluorescence spectra, of which the spectra shows a decrease fluorescence intensity in the presence of guests. The extent of fluorescence variation of TC[6]A-1, TC[6]A-2, TC[6]A-3 and C[6]A-2 upon a guest addition was recognized as the manifestation of sensing ability of the hosts. A sensing parameter (∆I/I0) was used to describe the sensing ability of four hosts. Host TC[6]A-2 was able to detect 2,4-dichlorophenoxyacetic acid with high sensitivity. The guest-induced variations in the fluorescence intensities and MM2-minimized structures of the hosts suggest that the appended moieties of the hosts act as a hydrophobic cap and a probe showing the host to form a 1:1 host- guest complex.

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12

Dai, Yanan, Peng Zhao, Lili Wang, Yun Ding, and Aiguo Hu. "Controlled synthesis of soluble conjugated polymeric nanoparticles for fluorescence detection." RSC Advances 7, no. 41 (2017): 25740–45. http://dx.doi.org/10.1039/c7ra03719h.

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13

Cordes, David B., and Bakthan Singaram. "A unique, two-component sensing system for fluorescence detection of glucose and other carbohydrates." Pure and Applied Chemistry 84, no. 11 (May 2, 2012): 2183–202. http://dx.doi.org/10.1351/pac-con-11-10-36.

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In our glucose-sensing system, a boronic acid-modified viologen molecule quenches the fluorescence of a separate dye molecule. When glucose or other monosaccharides are added and bind to the boronic acid, the quenching ability of the viologen is diminished and fluorescence increases. Thus, changes in the fluorescence of the dye can be correlated with changing glucose concentration. Quenching and sugar-sensing results are explained by an electrostatic interaction between dye and quencher. This modular system can be configured in a nearly unlimited number of ways through substitution and multiplexing of the two fundamental quencher and dye components. Significantly, fluorescent quantum dots (QDs) can also be used as the reporter component. The system can also be immobilized in a hydrogel polymer to provide real-time, reversible sugar sensing.

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14

Santonocito, Rossella, Manuelamaria Intravaia, Ivana Maria Caruso, Andrea Pappalardo, Giuseppe Trusso Sfrazzetto, and Nunzio Tuccitto. "Fluorescence sensing by carbon nanoparticles." Nanoscale Advances 4, no. 8 (2022): 1926–48. http://dx.doi.org/10.1039/d2na00080f.

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15

Rolinski, Olaf J., and David J. S. Birch. "Structural sensing using fluorescence nanotomography." Journal of Chemical Physics 116, no. 23 (June 15, 2002): 10411–18. http://dx.doi.org/10.1063/1.1479720.

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16

Lakowicz, Joseph R., Ignacy Gryczynski, Zygmunt Gryczynski, Leah Tolosa, Govind Rao, Jonathan Dattelbaum, and Lisa Eichorn. "Novel Methods in Fluorescence Sensing." Microscopy and Microanalysis 5, S2 (August 1999): 506–7. http://dx.doi.org/10.1017/s1431927600015853.

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Chemical sensing based on fluorescence is presently undergoing rapid development. As one example, fluorescence lifetime measurements are now being used for measuring cation and anion concentrations in clinical chemistry, cellular imaging and flow cytometry. Additionally, there is an increasing use of proteins as sensors because of their high affinity and specificity for ligands.In this report we describe some recently developed approaches to fluorescence sensing. These new methods are based on the use of a fluorescence reference either within the sample or external to the sample, but within the optical path. Two types of references are used; microsecond lifetime metalligand complexes (MLCs) or oriented films of ns decay time fluorophores. A protein sensor for glucose was developed using the glucose-galactose binding protein (GGBP) from E.coli (Figure 1).

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17

Yuan, Yuan, Xiao-Sheng Yan, Xiao-Rui Li, Jin-Lian Cao, Zhao Li, and Yun-Bao Jiang. "Folded short azapeptide for conformation switching-based fluorescence sensing." Chemical Communications 53, no. 98 (2017): 13137–40. http://dx.doi.org/10.1039/c7cc06915d.

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Dipeptide-based amidothiourea (azapeptides) bearing folded β-turn structures were employed to build beacon-like fluorescent sensors signalled by pyrene exciplex or excimer dual emission to allow highly sensitive ratiometric fluorescence sensing of an anion able to bind to the structural moiety placed within the turn structure.

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18

Farshbaf, Sepideh, Kaustav Dey, Wakana Mochida, Masashi Kanakubo, Ryuhei Nishiyabu, Yuji Kubo, and Pavel Anzenbacher. "Detection of phosphates in water utilizing a Eu³⁺-mediated relay mechanism." New Journal of Chemistry 46, no. 4 (2022): 1839–44. http://dx.doi.org/10.1039/d1nj04578d.

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19

He, Xiao-Peng, Yi Zang, Tony D. James, Jia Li, Guo-Rong Chen, and Juan Xie. "Fluorescent glycoprobes: a sweet addition for improved sensing." Chemical Communications 53, no. 1 (2017): 82–90. http://dx.doi.org/10.1039/c6cc06875h.

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We highlight recent progress from our labs for the development of fluorescent glycoprobes for sensing ions/lectins and targeted detection of intracellular species, including the construction of their 2D material composites for targeted fluorescence imaging and theranostics.

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20

Guo, Yaowei, Jin Liu, Qinglin Tang, Cuicui Li, Yanying Zhang, Yao Wang, Yanxin Wang та ін. "Lanthanide (Eu3+/Tb3+)-Loaded γ-Cyclodextrin Nano-Aggregates for Smart Sensing of the Anticancer Drug Irinotecan". International Journal of Molecular Sciences 23, № 12 (13 червня 2022): 6597. http://dx.doi.org/10.3390/ijms23126597.

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The clinical use of anticancer drugs necessitates new technologies for their safe, sensitive, and selective detection. In this article, lanthanide (Eu3+ and Tb3+)-loaded γ-cyclodextrin nano-aggregates (ECA and TCA) are reported, which sensitively detects the anticancer drug irinotecan by fluorescence intensity changes. Fluorescent lanthanide (Eu3+ and Tb3+) complexes exhibit high fluorescence intensity, narrow and distinct emission bands, long fluorescence lifetime, and insensitivity to photobleaching. However, these lanthanide (Eu3+ and Tb3+) complexes are essentially hydrophobic, toxic, and non-biocompatible. Lanthanide (Eu3+ and Tb3+) complexes were loaded into naturally hydrophilic γ-cyclodextrin to form fluorescent nano-aggregates. The biological nontoxicity and cytocompatibility of ECA and TCA fluorescent nanoparticles were demonstrated by cytotoxicity experiments. The ECA and TCA fluorescence nanosensors can detect irinotecan selectively and sensitively through the change of fluorescence intensity, with detection limits of 6.80 μM and 2.89 μM, respectively. ECA can safely detect irinotecan in the cellular environment, while TCA can detect irinotecan intracellularly and is suitable for cell labeling.

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21

Fernandes, Gregory E., Ya-Wen Chang, Akash Sharma, and Sarah Tutt. "One-Step Assembly of Fluorescence-Based Cyanide Sensors from Inexpensive, Off-The-Shelf Materials." Sensors 20, no. 16 (August 11, 2020): 4488. http://dx.doi.org/10.3390/s20164488.

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We report a simple and versatile approach to assemble sensitive and selective fluorescence “turn-on” sensors for cyanide by combining three off-the-shelf materials; namely fluorescent dye, 1-vinyl imidazole polymer, and cupric chloride. The cyanide-sensing species is a non-fluorescent fluorophore-polymer-Cu2+ complex; which forms as a result of the imidazole polymer’s ability to bind both fluorophore and fluorescence quencher (Cu2+). Cyanide removes Cu2+ from these complexes; thereby “turning-on” sensor fluorescence. These sensors are water-soluble and have a detection limit of ~2.5 μM (CN−) in water. Our ternary complex-based sensing approach also enables facile emission tuning; we demonstrate the convenient, synthesis-free preparation of blue and green-emitting sensors using distyrylbiphenyl and fluorescein fluorophores, respectively. Furthermore; these ternary complexes are easily immobilized using agarose to create cyanide-sensing hydrogels; which are then used in a simple; novel microdiffusion apparatus to achieve interference-free cyanide analysis of aqueous media. The present study provides an inexpensive approach for portable; interference-free cyanide detection.

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22

Zhang, Yu, Xin Xu, and Bing Yan. "A multicolor-switchable fluorescent lanthanide MOFs triggered by anti-cancer drugs: multifunctional platform for anti-cancer drug sensing and information anticounterfeiting." Journal of Materials Chemistry C 10, no. 9 (2022): 3576–84. http://dx.doi.org/10.1039/d1tc05935a.

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23

Shan, Xiaoyue, Lujing Chai, Juanjuan Ma, Zhaosheng Qian, Jianrong Chen, and Hui Feng. "B-doped carbon quantum dots as a sensitive fluorescence probe for hydrogen peroxide and glucose detection." Analyst 139, no. 10 (2014): 2322–25. http://dx.doi.org/10.1039/c3an02222f.

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24

Chen, Faqiang, Hui Xu, Youlie Cai, Wei Zhang, Penglei Shen, Wenhua Zhang, Hangqing Xie, Gongxun Bai, Shiqing Xu, and Junkuo Gao. "Multi-Responsive Sensor Based on Porous Hydrogen-Bonded Organic Frameworks for Selective Sensing of Ions and Dopamine Molecules." Molecules 27, no. 24 (December 9, 2022): 8750. http://dx.doi.org/10.3390/molecules27248750.

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Анотація:

Hydrogen-bonded organic frameworks (HOFs), as an emerging porous material, have attracted increasing research interest in fluorescence sensing due to their inherent fluorescence emission units with unique physicochemical properties. Herein, based on the organic building block 3,3′,5,5′-tetrakis-(4-carboxyphenyl)-1,1′-biphenyl (H4TCBP), the porous material HOF-TCBP was successfully synthesized using hydrogen bond self-assembly in a DMF solution. The fluorescence properties of the HOF-TCBP solution showed that when the concentration was high, excimers were easily formed, the PL emission was red-shifted, and the fluorescence intensity became weaker. HOF-TCBP showed good sensitivity and selectivity to metal ions Fe3+, Cr3+, and anion Cr2O72−. In addition, HOF-TCBP can serve as a label-free fluorescent sensor material for the sensitive and selective detection of dopamine (DA). HOF-based DA sensing is actually easy, low-cost, simple to operate, and highly selective for many potential interfering substances, and it has been successfully applied to the detection of DA in biological samples with satisfactory recoveries (101.1–104.9%). To our knowledge, this is the first report of HOF materials for efficient detection of the neurotransmitter dopamine in biological fluids. In short, this work widely broadens the application of HOF materials as fluorescent sensors for the sensing of ions and biological disease markers.

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25

Lewis, Aaron, Ella Wajnryt, Patricia Hamra, and Chaya Lewis. "Nanometric Ion Sensing using Near-Field Ratiometric Fluorescence Sensing." Biophysical Journal 100, no. 3 (February 2011): 161a. http://dx.doi.org/10.1016/j.bpj.2010.12.1097.

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26

Lu, Qi, Mimi Zhan, Lijing Deng, Guangyan Qing, and Taolei Sun. "Rapid and high-efficiency discrimination of different sialic acid species using dipeptide-based fluorescent sensors." Analyst 142, no. 19 (2017): 3564–68. http://dx.doi.org/10.1039/c7an00762k.

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27

Wang, Liuzheng, Xiang He, Wei Zhang, Yong Liu, Craig E. Banks, and Ying Zhang. "Investigating structure–property relationships of biomineralized calcium phosphate compounds as fluorescent quenching–recovery platform." Royal Society Open Science 5, no. 2 (February 2018): 170877. http://dx.doi.org/10.1098/rsos.170877.

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The structure–property relationship between biomineralized calcium phosphate compounds upon a fluorescent quenching–recovery platform and their distinct crystalline structure and surficial functional groups are investigated. A fluorescence-based sensing platform is shown to be viable for the sensing of 8-hydroxy-2-deoxy-guanosine in simulated systems.

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28

Wang, Li Hua. "Fluorescent Sensors for Mg(II) Based on Phthalocyanine PcOC8." Applied Mechanics and Materials 454 (October 2013): 106–9. http://dx.doi.org/10.4028/www.scientific.net/amm.454.106.

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A chemosensor was designed, and its sensing behavior toward metal ions was investigated by fluorescence spectroscopies. The fluorescence measurements indicated that the PcOC8 has excellent fluorescence emission in methanol solution, and the intensity of fluorescence emission was enhanced by adding Mg (II) ion, whereas other ions including Zn (II), Ba (II), Ca (II), Ni (II), Co (II), Cd (II), Cr (II), Fe (III), Pb (II), Cu (II), and K(I) could quench the intensity of fluorescence emission, which constituted a Mg (II)-selective fluorescent chemosensor.

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29

Tao, Yufang, Yansong Jiang, Yating Huang, Junning Liu, Ping Zhang, Xiaodong Chen, Yong Fan, Li Wang, and Jianing Xu. "Carbon dots@metal–organic frameworks as dual-functional fluorescent sensors for Fe3+ ions and nitro explosives." CrystEngComm 23, no. 22 (2021): 4038–49. http://dx.doi.org/10.1039/d1ce00392e.

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30

Wang, Hai-Bo, Hong-Ding Zhang, Ying Chen, Li-Juan Ou, and Yan-Ming Liu. "Poly(thymine)-templated fluorescent copper nanoparticles for label-free detection of N-acetylcysteine in pharmaceutical samples." Analytical Methods 7, no. 15 (2015): 6372–77. http://dx.doi.org/10.1039/c5ay00841g.

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31

Fu, Yongxin, Hui Jin, Xiangning Bu, and Rijun Gui. "Magnetic and fluorescent nanohybrids with surface imprinting silica as a dual-functional sensing platform for ratiometric fluorescence detection of phycoerythrin." Journal of Materials Chemistry C 7, no. 37 (2019): 11483–92. http://dx.doi.org/10.1039/c9tc03517f.

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32

Fedotov, Yu V., D. A. Kravtsov, A. A. Cherpakova, M. L. Belov, and V. A. Gorodnichev. "An Experimentally Studied Laser Fluorescence Method for Sensing Stress Situations of Oil-polluted Plants." Mechanical Engineering and Computer Science, no. 8 (September 11, 2017): 1–11. http://dx.doi.org/10.24108/0817.0001299.

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Nowadays, one of the promising applications for the laser fluorescent analysis in remote sensing is to monitor oil pollution both on the water surface and on the earth one.A task to provide laser fluorescence remote sensing of oil pollution on the earth surface is much more difficult than that of to do the same on the water surface. The monitoring oil pollution laser fluorescence results can have no large reliability (lead to the great number of false alarms) because of the great number of disrupters (for example, plant fluorescence).However, plants available in the pipeline corridor may be not only disrupter, but also an oil pollution mark. Oil pollutions lead to developmental disorder of plants and induce their stress. The laser fluorescence methods can detect such stress situations.The paper concentrates on the experimental studies of laser fluorescence remote sensing method to detect the plant oil pollution stress situations for the eye-safe fluorescence excitation wavelength of 355 nm.A laboratory setup was designed to study spectra of laser-induced fluorescence of plants. In the laboratory setup the third harmonic of the Nd-YAG laser at the eye-safe wavelength of 355 nm was used as a fluorescence-exciting source. The laser-induced fluorescence spectra of plants were measured within 380 – 780 nm spectrum range.The experimental study results of laser-induced fluorescence spectra of plants in normal and stress situations caused by oil pollution are given for the eye-safe fluorescence- exciting wavelength ofThe paper shows that the analysis of recorded laser-induced fluorescence spectra allows us to detect stress situations caused by oil pollution. An identifiable factor to characterise a profile deformation of the laser-induced fluorescence spectrum for stress situations may be a fluorescence intensity ratio in the spectral ranges of 680…690 nm and 730…740 nm.

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33

Xu, Shichao, Chen Zhang, Lei He, Tongyao Wang, Liusong Ni, Mengna Sun, Heng Miao, et al. "DNA Detection ofToxoplasma gondiiwith a Magnetic Molecular Beacon Probe via CdTe@Ni Quantum Dots as Energy Donor." Journal of Nanomaterials 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/473703.

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A new method for detection ofToxoplasma gondiivia DNA sensing technology was developed in this study. It was based on the mechanism of fluorescence resonance energy transfer (FRET) in which multifunctional and magnetic-fluorescent CdTe@Ni quantum dots (mQDs) were utilized as energy donor and a commercial BHQ2as acceptor. The sensing probe was fabricated by labeling a stem-loopToxoplasma gondiiDNA oligonucleotide with CdTe@Ni mQDs at the 5′ end and BHQ2at 3′ end, respectively. The surface assembly of CdTe on Ni core and the formation of CdTe@Ni were confirmed by XRD analysis. The sizes of CdTe, Ni nanoparticles, and CdTe@Ni were measured via TEM and XRD methods and estimated to be~3 nm,~15 nm, and~20 nm, respectively. The sensing ability was investigated by the fluorescence spectrum (FS). An obvious fluorescence recovery was observed when the complete complimentary targetToxoplasma gondiiDNA was introduced, which did not happen in the case of the target DNA with one-base pair mismatch. Our research indicates that the current sensing probe is sensitive and specific in detection ofToxoplasma gondiiDNA and has great potential in Toxoplasmosis diagnosis.

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34

Jana, Swapan Kumar, Amit Kumar Mandal, Anoop Kumar, Horst Puschmann, Maidul Hossain, and Sudipta Dalai. "Sensing of tryptophan by a non-toxic cobalt(ii) complex." RSC Advances 6, no. 98 (2016): 95888–96. http://dx.doi.org/10.1039/c6ra16086g.

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35

Yu, Wan-Ting, Ting-Wei Wu, Chi-Ling Huang, I.-Chia Chen, and Kui-Thong Tan. "Protein sensing in living cells by molecular rotor-based fluorescence-switchable chemical probes." Chemical Science 7, no. 1 (2016): 301–7. http://dx.doi.org/10.1039/c5sc02808f.

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We introduce a general design to construct fluorescence-switching probes. Upon the interaction of the ligand with the protein, the crowded surroundings restrict the bond rotation of the fluorescent molecular rotor to trigger a strong fluorescence signal, which is reduced upon the addition of a competitive ligand or after protein degradation.

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36

Singh, Rajshree, Kheyanath Mitra, Shikha Singh, Sudipta Senapati, Vijay Kumar Patel, Sambhav Vishwakarma, Archana Kumari, et al. "Highly selective fluorescence ‘turn off’ sensing of picric acid and efficient cell labelling by water-soluble luminescent anthracene-bridged poly(N-vinyl pyrrolidone)." Analyst 144, no. 11 (2019): 3620–34. http://dx.doi.org/10.1039/c8an02417k.

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37

Formica, Mauro, Vieri Fusi, Daniele Paderni, Gianluca Ambrosi, Mario Inclán, Maria Paz Clares, Begoña Verdejo, and Enrique García-España. "A Metal-Based Receptor for Selective Coordination and Fluorescent Sensing of Chloride." Molecules 26, no. 8 (April 18, 2021): 2352. http://dx.doi.org/10.3390/molecules26082352.

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A scorpionate Zn2+ complex, constituted by a macrocyclic pyridinophane core attached to a pendant arm containing a fluorescent pyridyl-oxadiazole-phenyl unit (PyPD), has been shown to selectively recognize chloride anions, giving rise to changes in fluorescence emission that are clearly visible under a 365 nm UV lamp. This recognition event has been studied by means of absorption, fluorescence, and NMR spectroscopy, and it involves the intramolecular displacement of the PyPD unit by chloride anions. Moreover, since the chromophore is not removed from the system after the recognition event, the fluorescence can readily be restored by elimination of the bound chloride anion.

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38

Chen, Lei, Wenjing Qi, Chengpei Du, Yi Wang, Chun Liu, Xiaomei Huang, and Xiaojuan Chang. "A novel copper ion sensing fluorescent probe for fast detection of pyrophosphate and alkaline phosphatase." New Journal of Chemistry 45, no. 7 (2021): 3727–34. http://dx.doi.org/10.1039/d1nj00075f.

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39

Russell, B. A., K. Kubiak-Ossowska, P. A. Mulheran, D. J. S. Birch, and Y. Chen. "Locating the nucleation sites for protein encapsulated gold nanoclusters: a molecular dynamics and fluorescence study." Physical Chemistry Chemical Physics 17, no. 34 (2015): 21935–41. http://dx.doi.org/10.1039/c5cp02380g.

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40

Li, Zi-Wei, Bin Tan, Zhao-Feng Wu, and Xiao-Ying Huang. "A Robust Strontium Coordination Polymer with Selective and Sensitive Fluorescence Sensing Ability for Fe3+ Ions." Materials 16, no. 2 (January 6, 2023): 577. http://dx.doi.org/10.3390/ma16020577.

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Exploration of sensitive and selective fluorescence sensors towards toxic metal species is of great importance to solve metal pollution issues. In this work, a three-dimensional (3D) strontium coordination polymer of Sr2(tcbpe) (H4tcbpe = 1,1,2,2-tetrakis(4-(4-carboxy-phenyl)phenyl)ethene) has been synthesized and developed as a fluorescent sensor to Fe3+ ions. Sr2(tcbpe) shows a mechanochromic fluorescence with emission shifting from blue of the pristine to green after being ground. Notably, based on a fluorescence quenching mechanism, Sr2(tcbpe) displays a sensitive and selective fluorescent sensing behavior to Fe3+ ions with a detection limit of 0.14 mM. Moreover, Sr2(tcbpe) exhibits high tolerance to water in a wide pH range (pH = 3–13), demonstrating that Sr2(tcbpe) is a potential fluorescent sensor of Fe3+ in water.

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41

Choe, Donghwan, and Cheal Kim. "An Acylhydrazone-Based Fluorescent Sensor for Sequential Recognition of Al3+ and H2PO4−." Materials 14, no. 21 (October 25, 2021): 6392. http://dx.doi.org/10.3390/ma14216392.

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A novel acylhydrazone-based fluorescent sensor NATB was designed and synthesized for consecutive sensing of Al3+ and H2PO4−. NATB displayed fluorometric sensing to Al3+ and could sequentially detect H2PO4− by fluorescence quenching. The limits of detection for Al3+ and H2PO4− were determined to be 0.83 and 1.7 μM, respectively. The binding ratios of NATB to Al3+ and NATB-Al3+ to H2PO4− were found to be 1:1. The sequential recognition of Al3+ and H2PO4− by NATB could be repeated consecutively. In addition, the practicality of NATB was confirmed with the application of test strips. The sensing mechanisms of Al3+ and H2PO4− by NATB were investigated through fluorescence and UV–Visible spectroscopy, Job plot, ESI-MS, 1H NMR titration, and DFT calculations.

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42

Wang, Yong, Tianxia Chen, Zhengtao Zhang, and Yongnian Ni. "Cytidine-stabilized copper nanoclusters as a fluorescent probe for sensing of copper ions and hemin." RSC Advances 8, no. 17 (2018): 9057–62. http://dx.doi.org/10.1039/c7ra11383h.

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A sensitive and selective fluorescence “turn on–off” strategy for simultaneous detection of Cu²⁺and hemin was proposed on the basis of the formation of fluorescent CuNCs and the inner filter effect of hemin on the fluorescence of the CuNCs.

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43

Jian, Nannan, Kai Qu, Hua Gu, Lie Zou, Ximei Liu, Faqi Hu, Jingkun Xu, Yan Yu, and Baoyang Lu. "Highly fluorescent triazolopyridine–thiophene D–A–D oligomers for efficient pH sensing both in solution and in the solid state." Physical Chemistry Chemical Physics 21, no. 13 (2019): 7174–82. http://dx.doi.org/10.1039/c9cp00672a.

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Triazolopyridine–thiophene fluorophores exhibit high fluorescence quantum yields both in solution (80–89%) and in the solid state (13–26%). Because of an excellent and reversible pH induced fluorescence quenching/recovery, sensing devices such as fluorescent papers and complex inkjet-printed patterns are successfully fabricated for the detection of volatile acids both in solution and in a vapor atmosphere.

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44

Vishnoi, Pratap, Saumik Sen, G. Naresh Patwari, and Ramaswamy Murugavel. "Charge transfer aided selective sensing and capture of picric acid by triphenylbenzenes." New Journal of Chemistry 39, no. 2 (2015): 886–92. http://dx.doi.org/10.1039/c4nj01093k.

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45

Erande, Yogesh, Santosh Chemate, Ankush More, and Nagaiyan Sekar. "PET governed fluorescence “Turn ON” BODIPY probe for selective detection of picric acid." RSC Advances 5, no. 109 (2015): 89482–87. http://dx.doi.org/10.1039/c5ra17932g.

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The non-fluorescent meso diaminophenyl 1,3,5,7-tetramethyl BODIPY dye has been investigated and employed for picric acid sensing in a constructive way by regenerating its fluorescence through PET hindrance.

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46

Dai, Jingjing, Michael Zambrana, and Maria Fidalgo. "Amino-functionalized Fluorescent Carbon Dots for Chemical Sensing." MRS Advances 1, no. 19 (2016): 1365–70. http://dx.doi.org/10.1557/adv.2016.169.

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ABSTRACTQuantum dots have been applied in sensing with success, but their use in environmental applications has been questioned due to their heavy metal content. Carbon dots are fluorescent nanoparticles that offer a promising alternative to quantum dots for sensing, due to their low cost, benign fabrication process and negligible environmental impact. Fluorescence sensors are specially suited for detection of nitroaromatic compounds such as 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT), since they can quench the emission of excited species. When combined to Molecularly Imprinted Polymers (MIPs), the sensors become specific to the imprinted target molecules. Amino-functionalized carbon dots (CDs) with high photoluminescence were fabricated. The CDs were characterized with respect to their surface charge, surface chemistry, particle size distribution, and photoluminescence properties (PL). A molecularly imprinted polymer with template of DNT was combined with fluorescent carbon dots via a simple covalent reaction. The ability of aqueous DNT to quench amino CDs fluorescence was tested for concentrations in the range of 1mM to 50 mM. It can be concluded that the amino carbon dots can be used in fluorescent-labeled MIP systems and that they provide a feasible method for the detection of DNT, and potentially other nitroaromatic compounds, in environmental water samples.

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47

Wei, Yuxin, Yangyang Zhou, Yanli Wei, Chuan Dong, and Li Wang. "A fluorescent aptasensor based on berberine for ultrasensitive detection of bisphenol A in tap water." Analytical Methods 13, no. 15 (2021): 1816–22. http://dx.doi.org/10.1039/d1ay00180a.

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48

Sun, X. Y., M. J. Yuan, B. Liu, and J. S. Shen. "Carbon dots as fluorescent probes for detection of VB12 based on the inner filter effect." RSC Advances 8, no. 35 (2018): 19786–90. http://dx.doi.org/10.1039/c8ra03070g.

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49

Dowell, L. Jonathan. "Fluorescence Thermometry." Applied Mechanics Reviews 45, no. 7 (July 1, 1992): 253–60. http://dx.doi.org/10.1115/1.3119756.

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The fluorescence of rare-earth-doped ceramic phosphors depends on temperature. Particularly, the fluorescence lifetime is decreased by temperature. This dependence makes the fluorescence suitable for measuring temperature. This paper describes the physics of the fluorescence of these ceramics, noting the works of Forster, Dexter, Inokuti, Hirayama, and others. Next, it outlines the several advantages of fluorescence thermometry. These advantages include (a) measurement of temperature by transfer to measurement standards for time, (b) remote sensing for surface thermometry, (c) high speed of measurement relative to many physical and mechanical phenomena, (d) narrow-spectrum optical sensing suitable for hostile electrical and luminous environments, and (e) the transfer of calibration standards for precise thermometry. The paper presents engineering considerations for realizing these advantages. It presents parameter-estimation techniques that allow measurement of the temperature-dependent fluorescence parameters. It describes instrumentation techniques that transfer the measurement of temperature to measurement of units of time, with instrument calibration by atomic standards. It also discusses other measurement and instrumentation details.

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50

Zheng, Guihua, Shiyao Li, Ting Zhang, Feiyun Zhu, Jing Sun, Shuangjiang Li, and Linfeng You. "Water Pollution Control and Treatment Based on Quantum Dot Chemical and Biological High-Sensitivity Sensing." Journal of Sensors 2021 (October 28, 2021): 1–10. http://dx.doi.org/10.1155/2021/8704363.

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Inorganic pollutants in water can have an important impact on ecosystems and human health, so the development of rapid and sensitive detection methods for typical inorganic pollutants in water samples is important for understanding the pollution status of the water environment, as well as water pollution prevention and protection of drinking water safety. Fluorescence sensing technology has the advantages of fast response, high sensitivity, simple operation, and low cost but still has the problems of low quantum yield, cumbersome construction process, and limited practical applications. Based on the excellent fluorescence properties, a series of fluorescence sensing was constructed for the rapid, highly sensitive, and selective detection of various typical inorganic pollutants in water. And the related fluorescence sensing mechanism was investigated in this paper. In this paper, nitrogen/sulfur codoped carbon quantum dots (N, S-CQDs) were prepared for the sensitive and selective detection of sulfide and ferric ion. The blue fluorescent N, S-CQDs were prepared by a one-step hydrothermal method using ammonium citrate and L-cysteine as raw materials, which have excitation wavelength dependence and fluorescence quantum yield of 16.1% for the selective detection of sulfides with a detection limit ( S / N = 3 ) of 11.0 nM (about 0.35 μg/L). CQDs with significantly higher fluorescence quantum yields (69%) and no excitation dependence were prepared when citric acid was used instead of ammonium citrate and were used for the selective detection of ferric ion with a detection limit of 14.0 nM (~0.8 μg/L). The method has been successfully applied to the determination of total phosphorus in surface water and human urine, and the fluorescence color change of the dual-emission sensing can be used for the naked-eye identification and semiquantitative detection of phosphate.

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