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Journal articles on the topic 'FLUORESCENCE CHEMOSENSORS'

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Author: Grafiati

Published: 10 March 2023

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1

Ikeda, Hiroshi. "Diversely Responsive Turn-On Fluorescent Cyclodextrin Chemosensors: Guest Selectivities and Mechanism Insights." Chemosensors 8, no. 3 (July 1, 2020): 48. http://dx.doi.org/10.3390/chemosensors8030048.

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Chemosensors have attracted considerable attention among the numerous strategies for detecting organic molecules in water. A turn-off mechanism was previously employed for the construction of a cyclodextrin (CD) chemosensor. This mechanism is greatly effective but has several shortcomings. In order to overcome these shortcomings, new fluorescent chemosensors NC0αCD, NC0βCD, and NC0γCD, which were (7-nitrobenz-2-oxa-1,3-diazol-4-yl)amine-modified α-CD, β-CD, and γ-CD, respectively, were prepared. Their guest selectivities were different from those of previously reported CD chemosensors. Here, the mechanism of new CD chemosensors was investigated using nuclear magnetic resonance (NMR) spectroscopy and molecular mechanics calculations. The fluorescence intensity of NC0βCD and NC0γCD slightly decreased and largely increased, respectively, upon the addition of ursodeoxycholic acid as a guest. This is due to the fact that the fluorophore of NC0βCD moved away to the hydrophilic bulk water to form hydrogen bonds between the host and the guest, while the fluorophore of NC0γCD remained located at the primary hydroxy side of the γ-CD unit to form a stable inclusion complex with hydrogen bonds between the fluorophore and the guest. NC0αCD also acted as a turn-on chemosensor for small guests, which could not be detected by the previous CD chemosensors. The motion restriction of the fluorophore through the generation of inclusion complexes could also contribute to increase in fluorescence intensity.

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2

Goyal, Hina, Ibrahim Annan, Deepali Ahluwalia, Arijit Bag, and Rajeev Gupta. "Discriminative ‘Turn-on’ Detection of Al3+ and Ga3+ Ions as Well as Aspartic Acid by Two Fluorescent Chemosensors." Sensors 23, no. 4 (February 6, 2023): 1798. http://dx.doi.org/10.3390/s23041798.

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In this work, two Schiff-base-based chemosensors L1 and L2 containing electron-rich quinoline and anthracene rings were designed. L1 is AIEE active in a MeOH-H2O solvent system while formed aggregates as confirmed by the DLS measurements and fluorescence lifetime studies. The chemosensor L1 was used for the sensitive, selective, and reversible ‘turn-on’ detection of Al3+ and Ga3+ ions as well as Aspartic Acid (Asp). Chemosensor L2, an isomer of L1, was able to selectively detect Ga3+ ion even in the presence of Al3+ ions and thus was able to discriminate between the two ions. The binding mode of chemosensors with analytes was substantiated through a combination of 1H NMR spectra, mass spectra, and DFT studies. The ‘turn-on’ nature of fluorescence sensing by the two chemosensors enabled the development of colorimetric detection, filter-paper-based test strips, and polystyrene film-based detection techniques.

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3

Mao, Hua, John B. Thorne, Jennifer S. Pharr, and Robert E. Gawley. "Effect of crown ether ring size on binding and fluorescence response to saxitoxin in anthracylmethyl monoazacrown ether chemosensors." Canadian Journal of Chemistry 84, no. 10 (October 1, 2006): 1273–79. http://dx.doi.org/10.1139/v06-093.

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Convenient macrocyclization synthetic routes for the preparation of different-sized monoaza anthracylmethyl crown ether chemosensors (15-crown-5, 18-crown-6, 21-crown-7, 24-crown-8, and 27-crown-9) are described. Evaluation of these crowns as chemosensors for saxitoxin revealed that the larger crowns have moderately higher binding constants, with the 27-crown-9 chemosensor having the largest binding constant (2.29 × 105 (mol/L)–1). Fluorescence enhancements of 100% were observed at saxitoxin concentrations of 5 µmol/L, which is close to the detection limit in mouse bioassay.Key words: anthracene, crown ethers, saxitoxin, paralytic shellfish poison (PSP), binding constants; chemosensors.

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4

Queirós, Carla, Vítor A. S. Almodôvar, Fábio Martins, Andreia Leite, Augusto C. Tomé, and Ana M. G. Silva. "Synthesis of Novel Diketopyrrolopyrrole-Rhodamine Conjugates and Their Ability for Sensing Cu2+ and Li+." Molecules 27, no. 21 (October 25, 2022): 7219. http://dx.doi.org/10.3390/molecules27217219.

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The search for accurate and sensitive methods to detect chemical substances, namely cations and anions, is urgent and widely sought due to the enormous impact that some of these chemical species have on human health and on the environment. Here, we present a new platform for the efficient sensing of Cu2+ and Li+ cations. For this purpose, two novel photoactive diketopyrrolopyrrole-rhodamine conjugates were synthesized through the condensation of a diketopyrrolopyrrole dicarbaldehyde with rhodamine B hydrazide. The resulting chemosensors 1 and 2, bearing one or two rhodamine hydrazide moieties, respectively, were characterized by 1H and 13C NMR and high-resolution mass spectrometry, and their photophysical and ion-responsive behaviours were investigated via absorption and fluorescence measurements. Chemosensors 1 and 2 displayed a rapid colorimetric response upon the addition of Cu2+, with a remarkable increase in the absorbance and fluorescence intensities. The addition of other metal ions caused no significant effects. Moreover, the resulting chemosensor-Cu2+ complexes revealed to be good probes for the sensing of Li+ with reversibility and low detection limits. The recognition ability of the new chemosensors was investigated by absorption and fluorescence titrations and competitive studies.

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5

Martins, Cátia D. F., Patrícia M. R. Batista, M. Manuela M. Raposo, and Susana P. G. Costa. "Crown Ether Benzoxazolyl-Alanines as Fluorimetric Chemosensors for the Detection of Palladium in Aqueous Environment." Chemistry Proceedings 3, no. 1 (November 14, 2020): 5. http://dx.doi.org/10.3390/ecsoc-24-08310.

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Palladium has wide application in different contexts and, as a consequence, high levels of palladium in the environment have been reported, representing a risk to human health. Considering the interest to develop more selective and sensitive chemosensors for this analyte, two novel benzoxazolyl-alanine derivatives bearing a crown ether moiety were studied as potential fluorimetric chemosensors for palladium detection. Preliminary chemosensory studies for these unnatural amino acids in the presence of selected metal cations were performed in acetonitrile solution and in aqueous mixtures of sodium dodecyl sulfate (SDS, 20 mM, pH 7.5) solution with acetonitrile, 90:10 v/v. In acetonitrile solution, these probes had a fluorescence response for different cations but, most importantly, in SDS aqueous solution both compounds displayed a selective fluorescence response in the presence of palladium.

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6

Wu, Qin, Tao Tao, Yunxia Zhao, and Wei Huang. "A Flexible Chemosensor Based on Colorimetric and Fluorescent Dual Modes for Rapid and Sensitive Detection of Hypochlorite Anion." Sensors 21, no. 23 (December 3, 2021): 8082. http://dx.doi.org/10.3390/s21238082.

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A flexible chemosensor has been developed based on colorimetric and fluorescent dual modes using tetraphenylethylene-centered tetraaniline (TPE4A) for rapid and sensitive detection of hypochlorite anion. The fluorescent probe TPE4A exhibits a unique aggregation-induced emission (AIE) character which is proved by a blue shift of the fluorescent peak from 544 to 474 nm with the water equivalents increasing. With the addition of hypochlorite in solution, the absorbance of the probe changes and the responding fluorescence color can be observed to change from light green to purple. The detection limit of hypochlorite is 1.80 × 10−4 M in solution, and the visual detection limit is 1.27 µg/cm2 with the naked eye for the flexible paper-based chemosensor. The proposed flexible chemosensors show a good selectivity and sensitivity which has great potential for effective detection of hypochlorite anions without any spectroscopic instrumentation.

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7

Bai, Liping, Yuhang Xu, Guang Li, Shuhui Tian, Leixuan Li, Farong Tao, Aixia Deng, Shuangshuang Wang, and Liping Wang. "A Highly Selective Turn-on and Reversible Fluorescent Chemosensor for Al3+ Detection Based on Novel Salicylidene Schiff Base-Terminated PEG in Pure Aqueous Solution." Polymers 11, no. 4 (March 27, 2019): 573. http://dx.doi.org/10.3390/polym11040573.

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The development of highly selective and sensitive chemosensors for Al3+ detection in pure aqueous solution is still a significant challenge. In this work, a novel water-soluble polymer PEGBAB based on salicylidene Schiff base has been designed and synthesized as a turn-on fluorescent chemosensor for the detection of Al3+ in 100% aqueous solution. PEGBAB exhibited high sensitivity and selectivity to Al3+ over other competitive metal ions with the detection limit as low as 4.05 × 10−9 M. PEGBAB displayed high selectivity to Al3+ in the pH range of 5–10. The fluorescence response of PEGBAB to Al3+ was reversible in the presence of ethylenediaminetetraacetic acid (EDTA). Based on the fluorescence response, an INHIBIT logic gate was constructed with Al3+ and EDTA as two inputs. Moreover, test strips based on PEGBAB were fabricated facilely for convenient on-site detection of Al3+.

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8

Udhayakumari, Duraisamy. "Various Sensing Mechanisms for the Design of Naphthalimide based Chemosensors Emerging in Recent Years." Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) 13, no. 4 (June 2, 2020): 262–89. http://dx.doi.org/10.2174/2405520413666200217125754.

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In the design of novel fluorescent chemosensors, investigation of new sensing mechanisms between recognition and signal reporting units is of increasing interest. In recent years, a smart chemosensor probe containing a 1,8-naphthalimide moiety could be developed as a fluorescent and colorimetric sensor for toxic anions, metal ions, biomolecules, nitroaromatics, and acids and be further applied to monitor the relevant biological applications. In this field, several problems and challenges still exist. This critical review is mainly focused on various sensing mechanisms that have emerged in the past few years, such as Photo-Induced Electron Transfer (PET), Intramolecular Charge Transfer (ICT), Fluorescence Resonance Energy Transfer (FRET), Excited-State Intramolecular Proton Transfer (ESIPT), hydrogen bonding and displacement approach. The review concludes with some current and future perspectives, including the use of the naphthalimides for sensing anions, metal ions, biomolecules, nitroaromatics and acids and their potential uses in various fields.

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9

Peng, Xiao Jun. "Fluorescence Chemosensors Based on Intramolecular Charge Transfer and Intramolecular Energy Transfer." Advanced Materials Research 441 (January 2012): 783. http://dx.doi.org/10.4028/www.scientific.net/amr.441.783.

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Ratiometric fluorescent sensors which based on ICT mechanism permit signal rationing to detect target molecules by measuring the ratio of fluorescence intensities at two different wavelengths, which are autoemitted by sensors upon binding objects. The autoreferential function of relative changes of two fluorescence intensities may avoid the influences of many nontarget factors in the changes of monofluorescence intensity. Therefore, the design of ratiometric fluorescent sensors is of great current interest. Generally, Cd2+ and Zn2+ havevery similar chemical properties, so the discrimination of them is very difficult.In sensor 1, we chose boradiazaindacene (BODIPY) as the fluorophore because it absorbs and emits in the visible region with high quantum yield, large extinction coefficient and good photo-stability,and N, N-bis(pyridin-2-ylmethyl)benzenamine as Cd2+ receptor. A vinyl group between the receptor and BODIPY fluorophore can induce red-shifts in absorption and fluorescence spectra. When Cd2+ is added into the aqueous solution of 1, owing to the reduction of the electron-donating character of the receptor, the photophysical properties of BODIPY will consequently be changed. In fact, 1 can distinguish Cd2+ from Zn2+ and especially can be used in both general fluorescence microscopy and ratiometric fluorescence microscopy.

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10

Xie, Puhui, Fengqi Guo, Changshan Li, and Yue Xiao. "A new chemosensor based on rhodamine 101 hydrazone for Cu (II) in the red region." Canadian Journal of Chemistry 89, no. 11 (November 2011): 1364–69. http://dx.doi.org/10.1139/v11-111.

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A new chemosensor based on the spirolactam form of rhodamine 101 hydrazone (III) is found to exhibit a reversible colorimetric response toward Cu2+ in aqueous solutions in a selective, sensitive and rapid manner because of a formation of a Cu(II)-III complex. The dominating absorption maximum at 584 nm is uniquely red-shifted among rhodamine chemosensors toward Cu2+. The fluorescence of III can be detected in a low concentration of Cu2+. The results revealed that III is a good colorimetric sensor to Cu2+ in the red region.

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11

Jin, Lei, Xiaoxue Tan, Cong Zhao, and Qingming Wang. "Two highly sensitive and selective coumarin-based fluorometric probes for the detection of ClO− and cell imaging." Analytical Methods 11, no. 14 (2019): 1916–22. http://dx.doi.org/10.1039/c9ay00105k.

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Two new coumarin-based fluorescent probes were synthesized and successfully applied for the efficient detection of ClO⁻ as turn-on fluorescence chemosensors by the oxidative cleavage of C–O and CN, the detection limits (LOD) for the two probes are 154 nM and 32 nM, respectively.

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12

Antina, Elena V., Mikhail B. Berezin, Galina B. Guseva, Natalia A. Bumagina, Lubov A. Antina, and Anatoliy I. V’yugin. "NEW COLORIMETRIC AND FLUORESCENT CHEMOSENSORS BASED ON DIPYRROMETHENE DYES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 6 (July 12, 2018): 16. http://dx.doi.org/10.6060/tcct.20165906.5397k.

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Synthetic bis(dipyrromethene)s (H2L) is very promising compounds to create sensory systems due to a combination of spectral-luminescent and chelating properties which sensitive to structural and solvation effects. Reactions of H2L·2HBr salts with amines are accompanied by changes in the color of the solution and a clear show a transformations of H4L2+ salt spectrum in the H2L spectrum with a large (about 40 nm) difference between maxima of their intense bands which allows the use of 3,3'-bis(dipyrromethene) salts as colorimetric chemosensors of amines with sensitivity of detection upto 1·10–8 mol/l. The basis for the development of applied directions of using 3,3-bis(dipyrromethene)s as a fluorescent chemosensors of Zn2+, Cd2+ and Hg2+ ions is the bright coloristic effects, accompanying reactions of H2L with Zn(II), Cd(II) and Hg(II) salts, and significant differences in quantitative characteristics of the spectra of the complexes [M2L2] and ligands. Reactions of Zn(II), Cd(II) and Hg(II) salts with a weakly fluorescent bis(dipyrromethene) sensors are accompanied by the buildup (in 25–550 times) of fluorescence. The high sensitivity of fluorescence of d10-metal [M2L2] helikates to the properties of the environment became the basis for the development of the direction of creating fluorescent temperature sensors. The observed effect of the temperature dependence of fluorescence quantum yield of ethanol solutions of [Zn2L2] complexes is interest for the control of temperature (300–80 K). This is important in the development of cryostats or determining temperature of biomaterials cooled in them.

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13

Yalcin, Ergin, Cem Erkmen, Tugba Taskin-Tok, and Mehmet Gokhan Caglayan. "Fluorescence chemosensing of meldonium using a cross-reactive sensor array." Analyst 145, no. 9 (2020): 3345–52. http://dx.doi.org/10.1039/d0an00209g.

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14

Pina, Fernando, M. João Melo, M. Alexandra Bernardo, Santiago V. Luis, and Enrique Garcı́a-España. "Chemosensors displaying pH controlled multistage fluorescence emission." Journal of Photochemistry and Photobiology A: Chemistry 126, no. 1-3 (September 1999): 65–69. http://dx.doi.org/10.1016/s1010-6030(99)00102-1.

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15

Huo, Fangjun, Yaqiong Zhang, and Caixia Yin. "Recent Progress in Chemosensors Using Aldehyde-bearing Fluorophores for the Detection of Specific Analytes and their Bioimaging." Current Medicinal Chemistry 26, no. 21 (September 19, 2019): 4003–28. http://dx.doi.org/10.2174/0929867325666180117095528.

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In recent years, aldehyde-appended fluorescence probes have attracted increasing attention. Fluorescent biological imaging includes many modern applications for cell and tissue imaging in biomedical research. Meanwhile, the nucleophilic mechanism is a very simple and convenient procedure for the preparation of aldehyde-sensing probes. This tutorial review focuses on aldehyde-bearing chemosensors based on nucleophilic addition mechanism with biological applications.

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16

Matmin, Juan, Nur Fatiha Ghazalli, Fazira Ilyana Abdul Razak, Hendrik O. Lintang, and Mohamad Azani Jalani. "Supramolecular Interactions in Aromatic Structures for Non-Optical and Optical Chemosensors of Explosive Chemicals." Solid State Phenomena 317 (May 2021): 202–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.317.202.

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The scientific investigation based on the molecular design of aromatic compounds for high-performance chemosensor is challenging. This is because their multiplex interactions at the molecular level should be precisely determined before the desired compounds can be successfully used as sensing materials. Herein, we report on the molecular design of chemosensors based on aromatic structures of benzene as the organic motif of benzene-1,3,5-tricarboxamides (BTA), as well as the benzene pyrazole complexes (BPz) side chain, respectively. In the case of BTA, the aromatic benzene acts as the centre to allow the formation of π–π stacking for one-dimensional materials having rod-like arrangements that are stabilized by threefold hydrogen bonding. We found that when nitrate was applied, the rod-like BTA spontaneously formed into a random aggregate due to the deformation of its hydrogen bonding to form inactive nitroso groups for non-optical sensing capability. For the optical chemosensor, the aromatic benzene is decorated as a side-chain of BPz to ensure that cage-shaped molecules make maximum use of their centre providing metal-metal interactions for fluorescence-based sensing materials. In particular, when exposed to benzene, Cu-BPz displayed a blue-shift of its original emission band from 616 to 572 nm (Δ = 44 nm) and emitted bright orange to green emission colours. We also observe a different mode of fluorescence-based sensing materials for Au-BPz, which shows a particular quenching mechanism resulting in 81% loss of its original intensity on benzene exposure to give less red-orange emission (λ = 612 nm). The BTA and BPz synthesized are promising high-performance supramolecular chemosensors based on the non-optical and optical sensing capability of a particular interest analyte.

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17

Hu, Yun, Aiqian Chen, Zhuo Kong, and Demeng Sun. "A Reversible Colorimetric and Fluorescence “Turn-Off” Chemosensor for Detection of Cu2+ and Its Application in Living Cell Imaging." Molecules 24, no. 23 (November 25, 2019): 4283. http://dx.doi.org/10.3390/molecules24234283.

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Dual-function chemosensors that combine the capability of colorimetric and fluorimetric detection of Cu2+ are still relatively rare. Herein, we report that a 3-hydroxyflavone derivative (E)-2-(4-(dimethylamino)styryl)-3-hydroxy-4H-chromen-4-one (4), which is a red-emitting fluorophore, could serve as a reversible colorimetric and fluorescence “turn-off” chemosensor for the detection of Cu2+. Upon addition of Cu2+ to 4 in neutral aqueous solution, a dramatic color change from yellow to purple-red was clearly observed, and its fluorescence was markedly quenched, which was attributed to the complexation between the chemosensor and Cu2+. Conditions of the sensing process had been optimized, and the sensing studies were performed in a solution of ethanol/phosphate buffer saline (v/v = 3:7, pH = 7.0). The sensing system exhibited high selectivity towards Cu2+. The limit of naked eye detection of Cu2+ was determined at 8 × 10−6 mol/L, whereas the fluorescence titration experiment showed a detection limit at 5.7 × 10−7 mol/L. The complexation between 4 and Cu2+ was reversible, and the binding constant was found to be 3.2 × 104 M−1. Moreover, bioimaging experiments showed that 4 could penetrate the cell membrane and respond to the intracellular changes of Cu2+ within living cells, which indicated its potential for biological applications.

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18

Saini, Anu, Manpreet Kaur, Mayank, Anil Kuwar, Navneet Kaur, and Narinder Singh. "Hybrid nanoparticle based fluorescence switch for recognition of ketoprofen in aqueous media." Molecular Systems Design & Engineering 5, no. 8 (2020): 1428–36. http://dx.doi.org/10.1039/d0me00065e.

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19

Tümay, Süreyya Oğuz, Aylin Uslu, Hüsniye Ardıç Alidağı, Hasan Hüseyin Kazan, Cansu Bayraktar, Tutku Yolaçan, Mahmut Durmuş, and Serkan Yeşilot. "A systematic series of fluorescence chemosensors with multiple binding sites for Hg(ii) based on pyrenyl-functionalized cyclotriphosphazenes and their application in live cell imaging." New Journal of Chemistry 42, no. 17 (2018): 14219–28. http://dx.doi.org/10.1039/c8nj02482k.

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20

Fu, Zhen-Hai, Ya-Wen Wang, and Yu Peng. "Two fluorescein-based chemosensors for the fast detection of 2,4,6-trinitrophenol (TNP) in water." Chemical Communications 53, no. 76 (2017): 10524–27. http://dx.doi.org/10.1039/c7cc05966c.

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21

Li, Yue, Le-Le Yang, Kun Liu, Fang-Yao Zhao, Huan Liu, and Wen-Juan Ruan. "Two hexaazatriphenylene-pyrene based Hg2+ fluorescent chemosensors applicable for test paper detection." New Journal of Chemistry 39, no. 4 (2015): 2429–32. http://dx.doi.org/10.1039/c4nj01928h.

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22

Jacobs, Brian P., Jacob Townsend, Konstantinos D. Vogiatzis, and Johnathan N. Brantley. "Ion specific fluorescence modulation of polyvinyl alcohol-boronate matrices." Polymer Chemistry 11, no. 11 (2020): 1919–25. http://dx.doi.org/10.1039/c9py01863h.

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Borylated polymers are emerging as valuable chemosensors that can report analyte binding through an array of responses. Condensing aryl boronic acids onto polyvinyl alcohol affords fluorescent polymers that can detect and extract borophilic anions.

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23

Zhou, Ying, Jun Feng Zhang, and Juyoung Yoon. "Fluorescence and Colorimetric Chemosensors for Fluoride-Ion Detection." Chemical Reviews 114, no. 10 (March 25, 2014): 5511–71. http://dx.doi.org/10.1021/cr400352m.

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24

Lodeiro, Carlos, and José Luis Capelo. "Fluorescence spectroscopy: From single chemosensors to nanoparticles science." Inorganica Chimica Acta 381 (February 2012): 1. http://dx.doi.org/10.1016/j.ica.2011.04.044.

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25

Huang, Xiao-Huan, Yong-Bing He, Zhi-Hong Chen, Chen-Guang Hu, and Guang-Yan Qing. "Novel chiral fluorescent chemosensors for malate and acidic amino acids based on two-arm thiourea and amide." Canadian Journal of Chemistry 86, no. 2 (February 1, 2008): 170–76. http://dx.doi.org/10.1139/v07-147.

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The charge neutral anthracene based chiral fluorescent receptors 4a and 4b containing thiourea and amide groups were synthesized by simple steps in good yields, and their enantioselective recognition for chiral dicarboxylic anions (L/D-malate, L/D-aspartate, and L/D-glutamate) were examined by UV–vis, fluorescence, and 1H NMR spectroscopy. The sensor 4a exhibited an excellent enantioselective recognition ability towards malate (Kass (L)/Kass (D) = 9.65).Key words: enantioselective recognition, chiral chemosensor, fluorescence, malate.

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26

González-Ruiz, Víctor, Jegathalaprathaban Rajesh, Ana I. Olives, Damiano Rocchi, Jorge Gómez-Carpintero, Juan F. González, Vellaisamy Sridharan, M. Antonia Martín, and J. Carlos Menéndez. "Antioxidants as Molecular Probes: Structurally Novel Dihydro-m-Terphenyls as Turn-On Fluorescence Chemodosimeters for Biologically Relevant Oxidants." Antioxidants 9, no. 7 (July 10, 2020): 605. http://dx.doi.org/10.3390/antiox9070605.

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One interesting aspect of antioxidant organic molecules is their use as probes for the detection and quantitation of biologically relevant reactive oxidant species (ROS). In this context, a small library of dihydroterphenyl derivatives has been synthesised and studied as fluorescent chemodosimeters for detecting reactive oxygen species and hypochlorite. The fluorescence quantum yields of these molecules are negligible, while the corresponding aromatized compounds formed upon oxidation show moderate to high native fluorescence, depending on their structures. The fluorescence signal is quickly developed in the presence of trace amounts of the probe and the analytes in acetonitrile media at room temperature, with good analytical figures. ROS detection in aqueous media required incubation at 37 °C in the presence of horseradish peroxidase, and was applied to glucose quantitation by coupling glucose oxidation by O2 to fluorescence detection of H2O2. The mild reaction conditions and sensitive fluorescent response lead us to propose dihydroterphenyls with an embedded anthranilate moiety as chemosensors/chemodosimeters for ROS detection.

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27

Wang, Bin, Ma Jing, and Ma Xiangmei. "Synthesis, characterization and fluorescent performance studies of novel diphenyl sulfone-functionalized water-soluble polymer." Journal of the Serbian Chemical Society 85, no. 11 (2020): 1463–73. http://dx.doi.org/10.2298/jsc200407041w.

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In this communication, a novel water-soluble diphenyl sulfone-functionalized polymer was successfully synthesized through a facile hydrothermal synthesis route and then characterized by FT-IR, UV?Vis, 1H-NMR and 13C- -NMR spectroscopy. Fluorescence quenching experiments revealed that the fluorescence intensities of the resulting diphenyl sulfone-functionalized polymers were linear with the concentrations of Fe3+ and 4-nitrophenol (4-NP) in the concentration ranges of (5.0?24.9)?10-8 and (5.0?50.0)?10-7 mol dm-3, with detection limits of 2.8?10-8 and 2.2?10-7 mol dm-3, respectively. These results created opportunities for the development of novel chemosensors by introducing selective fluorescent groups into polymeric materials.

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28

Liu, Shudi, Liangwei Zhang, Panpan Zhou, Wenyan Zan, Xiaojun Yao, Jingjun Yang, and Ying Yang. "HBT-based chemosensors for the detection of fluoride through deprotonation process: experimental and DFT studies." RSC Advances 5, no. 26 (2015): 19983–88. http://dx.doi.org/10.1039/c4ra13532f.

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When searching to develop fluoride chemosensors based on O–H⋯F, we discovered that an HBT-based fluorophore containing a hydroxyl group was easily synthesized and displayed excellent fluorescence properties.

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29

Antina, Elena V., Mikhail B. Berezin, Galina B. Guseva, Alexander A. Ksenofontov, and Anatoliy I. V’yugin. "ZINC(II) BIS(DIPYRROMETENATES) AS NEW FLUORESCENT CHEMOSENSORS OF N- AND O-CONTAINING ANALYTES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 6 (July 12, 2018): 22. http://dx.doi.org/10.6060/tcct.20165906.5398k.

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The results of spectral studies of the fluorescence of binuclear zinc(II) bis(dipyrrinate)s with 3,3′-, 2,3′- and 2,2′-bis(dipyrrine)s of the composition [Zn2L2] in binary mixtures of cyclohexane and N- and O -containing solvent Х (acetone, DMF, DMSO, TEA) are presented. Spectrophotometric studies have shown that additive in cyclohexane of analyte upto χХ<0.2 leads to red shift (to ~10 nm) of emission band maximum and to a sharp decrease in fluorescence quantum yield (φ) of [Zn2L2] luminophores. The observed effect is due to the additional coordination processes of the electron-donor molecules X, leading to the formation of solvates [Zn2L2Xn]. The efficiency of fluorescence quenching of [Zn2L2], formed by 3,3′, 2,3′- or 2,2′-bis(dipyrrine)s, is different. Zinc(II) 3,3′-bis(dipyrrometenat) demonstrates the highest sensitivity to fluorescence at the presence of X, as compared with the 2,3′- and 2,2′-analogues. The interpretation of found experimentally linear correlations of φ and calculated on the Stern-Volmer model of the apparent quenching fluorescence constants of helicates from the electron-donating ability of the analytes was given. Indicators of intensity relative change at different wavelengths of the [Zn2L2] fluorescence spectrum were suggested as analytical criterion of the analyte identification. The detection limits of toxicants X by means of [Zn2L2] amounted upto ~ 10–7– 10–5 mol/l in organic media. High specificity of spectral-luminescence characteristics changing in the presence of particular N- and O-containing analytes provides the possibility of using [Zn2L2] helicates as new fluorescent selective chemosensors of the electron-donor molecules in liquid media.

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30

Shi, Dongjian, Ming Ni, Jing Luo, Mitsuru Akashi, Xiaoya Liu, and Mingqing Chen. "Fabrication of novel chemosensors composed of rhodamine derivative for the detection of ferric ion and mechanism studies on the interaction between sensor and ferric ion." Analyst 140, no. 4 (2015): 1306–13. http://dx.doi.org/10.1039/c4an01991a.

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This paper presents the design and preparation of novel fluorescence chemosensors for detection ferric ions based on rhodamine derivatives, and studies on the recognition mechanisms and interaction between probes and metal ions.

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31

Oesch, David, and Nathan W. Luedtke. "Fluorescent chemosensors of carbohydrate triols exhibiting TICT emissions." Chemical Communications 51, no. 63 (2015): 12641–44. http://dx.doi.org/10.1039/c5cc03857j.

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32

Zhang, Yuyang, Jianyan Huang, Lin Kong, Yupeng Tian, and Jiaxiang Yang. "Two novel AIEE-active imidazole/ α-cyanostilbene derivatives: photophysical properties, reversible fluorescence switching, and detection of explosives." CrystEngComm 20, no. 9 (2018): 1237–44. http://dx.doi.org/10.1039/c7ce01842h.

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Novel imidazole derivatives containing the α-cyanostilbene unit can act as reversible acid/base stimulated fluorescence switches in the solid state, as chemosensors for explosives detection in aqueous systems, and as test strip detectors.

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33

Marazzi, Marco, Antonio Francés-Monerris, Maxime Mourer, Andreea Pasc, and Antonio Monari. "Trans-to-cis photoisomerization of cyclocurcumin in different environments rationalized by computational photochemistry." Physical Chemistry Chemical Physics 22, no. 8 (2020): 4749–57. http://dx.doi.org/10.1039/c9cp06565b.

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Solvent effects determine the fate of cyclocurcumin photochemistry: in non-polar environments fluorescence is preferred, while in polar solvents the photoisomerization path is opened, paving the way to applications as chemosensors and for theranostic purposes.

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34

Guo, Zhi, Guiqiu Chen, Guangming Zeng, Zhongwu Li, Anwei Chen, Jiajia Wang, and Longbo Jiang. "Fluorescence chemosensors for hydrogen sulfide detection in biological systems." Analyst 140, no. 6 (2015): 1772–86. http://dx.doi.org/10.1039/c4an01909a.

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35

Wu, Qianqian, Zhiqiang Liu, Duxia Cao, Ruifang Guan, Kangnan Wang, Yanyan Shan, Yongxiao Xu, and Lin Ma. "Coumarin amide derivatives as fluorescence chemosensors for cyanide anions." Materials Chemistry and Physics 161 (July 2015): 43–48. http://dx.doi.org/10.1016/j.matchemphys.2015.04.048.

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36

Liang, Muhan, Kangnan Wang, Ruifang Guan, Zhiqiang Liu, Duxia Cao, Qianqian Wu, Yanyan Shan, and Yongxiao Xu. "Several hemicyanine dyes as fluorescence chemosensors for cyanide anions." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 160 (May 2016): 34–38. http://dx.doi.org/10.1016/j.saa.2016.02.008.

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37

Wang, Zian, Qianqian Wu, Jiale Li, Shuang Qiu, Duxia Cao, Yongxiao Xu, Zhiqiang Liu, Xueying Yu, and Yatong Sun. "Two benzoyl coumarin amide fluorescence chemosensors for cyanide anions." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 183 (August 2017): 1–6. http://dx.doi.org/10.1016/j.saa.2017.04.008.

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38

Bonacchi, Sara, Enrico Rampazzo, Marco Montalti, Luca Prodi, Nelsi Zaccheroni, Fabrizio Mancin, and Pierluigi Teolato. "Amplified Fluorescence Response of Chemosensors Grafted onto Silica Nanoparticles." Langmuir 24, no. 15 (August 2008): 8387–92. http://dx.doi.org/10.1021/la800753f.

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39

Sheng, Jiang Run, Feng Feng, You Qiang, Fu Guo Liang, Lin Sen, and Fu-Hong Wei. "A Coumarin-Derived Fluorescence Chemosensors Selective for Copper(II)." Analytical Letters 41, no. 12 (August 25, 2008): 2203–13. http://dx.doi.org/10.1080/00032710802237673.

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40

Pearson, Anthony J., Jiunn-Jye Hwang, and Michael E. Ignatov. "Crown-annelated p -phenylenediamine derivatives as electrochemical and fluorescence responsive chemosensors: fluorescence studies." Tetrahedron Letters 42, no. 21 (May 2001): 3537–40. http://dx.doi.org/10.1016/s0040-4039(01)00500-7.

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41

Kovalev, I. S., L. K. Sadieva, O. S. Taniya, D. S. Kopchuk, G. V. Zyryanov, E. N. Ulomsky, V. L. Rusinov, and O. N. Chupakhin. "Detection of Anti-viral Drug Riamilovir and Herbicides in Aqueous Media by Using Pyrene-based Fluorescent Chemosensors." Chimica Techno Acta 8, no. 2 (May 20, 2021): 20218208. http://dx.doi.org/10.15826/chimtech.2021.8.2.08.

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Two ethyleneglycol esters of 1-pyrene carboxylic acid were studied as chemosensors for the fluorescence “turn-off” detection of two nitro-containing analytes, such as antiviral drug Riamilovir (Triazavirin ®) and herbicidal agent dinitro-ortho-cresol (DNOC). In both cases the dramatic fluorescence quenching was observed with quenching constants as high as 3·104 M-1 and limits of detection (LOD) as low as 100 ppb.

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42

Song, Fan, Chao Yang, Haibo Liu, Zhigang Gao, Jing Zhu, Xiaofeng Bao, and Chun Kan. "Dual-binding pyridine and rhodamine B conjugate derivatives as fluorescent chemosensors for ferric ions in aqueous media and living cells." Analyst 144, no. 9 (2019): 3094–102. http://dx.doi.org/10.1039/c8an01915k.

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Two new pyridine-type rhodamine B chemosensors (RBPO and RBPF) used to detect Fe³⁺ have been designed and synthesized, and the sensing behavior towards various metal ions was evaluated via UV–vis and fluorescence spectroscopic techniques.

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43

Hazra, Ananta, Ankita Roy, Abhishek Mukherjee, Guru Prasad Maiti, and Partha Roy. "Remarkable difference in Al3+ and Zn2+ sensing properties of quinoline based isomers." Dalton Transactions 47, no. 39 (2018): 13972–89. http://dx.doi.org/10.1039/c8dt02856g.

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4-Methyl-2-((quinolin-6-ylimino)methyl)phenol and 4-methyl-2-((quinolin-2-ylimino)methyl)phenol have been found to be dual fluorescence chemosensors for Al³⁺ and Zn²⁺ ions, but their sensing ability varies.

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44

Kovalev, I. S., L. K. Sadieva, O. S. Taniya, V. M. Yurk, A. S. Minin, D. S. Kopchuk, G. V. Zyryanov, V. N. Charushin, and O. N. Chupakhin. "Bispyrenylalkane Chemosensor for the Naked-eye Detection of Nitro-explosives." Chimica Techno Acta 8, no. 2 (May 20, 2021): 20218209. http://dx.doi.org/10.15826/chimtech.2021.8.2.09.

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Pyrene-based compounds have a great potential as fluorescent chemosensors for various analytes including common nitro-explosives, such as 2,4,6-trinitrotoluene (TNT). Compounds having two pyrene units in one molecule, such as bispyrenylalkanes, are able to form stable, bright emissive in a visual wavelength region excimers both in non-polar and polar environments. In this work we wish to report that in non-polar solvents the excimer has poor chemosensing properties while in aqueous solutions it provides significant “turn-off” fluorescence response to TNT in the sub-nanomolar concentrations.

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45

Sahu, Sutapa, Yeasin Sikdar, Riya Bag, Javier Cerezo, José P. Cerón-Carrasco, and Sanchita Goswami. "Turn on Fluorescence Sensing of Zn2+ Based on Fused Isoindole-Imidazole Scaffold." Molecules 27, no. 9 (April 30, 2022): 2859. http://dx.doi.org/10.3390/molecules27092859.

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Optical chemosensors caused a revolution in the field of sensing due to their high specificity, sensitivity, and fast detection features. Imidazole derivatives have offered promising features in the literature as they bear suitable donor/acceptor groups for the selective analytes in the skeleton. In this work, an isoindole-imidazole containing a Schiff base chemosensor (1-{3-[(2-Diethylamino-ethylimino)-methyl]-2-hydroxy-5-methyl-phenyl}-2H-imidazo[5,1-a]isoindole-3,5-dione) was designed and synthesized. The complete sensing phenomena have been investigated by means of UV-Vis, fluorescence, lifetime measurement, FT-IR, NMR and ESI-MS spectroscopic techniques. The optical properties of the synthesized ligand were investigated in 3:7 HEPES buffer:DMSO medium and found to be highly selective and sensitive toward Zn2+ ion through a fluorescence turn-on response with detection limit of 0.073 μm. Furthermore, this response is effective in gel form also. The competition studies reveal that the response of the probe for Zn2+ ion is unaffected by other relevant metal ions. The stoichiometric binding study was performed utilizing Job’s method which indicated a 1:1 sensor–Zn2+ ensemble. Computational calculations were performed to pinpoint the mechanism of sensing.

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Wang, Jun, Ning-Ning Chen, Chen-Dong Pan, Chen Zhang, and Liming Fan. "Selective fluorescence sensing properties of a novel two-fold interpenetrating coordination polymer." New Journal of Chemistry 44, no. 22 (2020): 9411–18. http://dx.doi.org/10.1039/d0nj01750g.

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One novel 3D interpenetrated Zn(ii) CP acts as multi-functional chemosensors in detection of acetone, Fe³⁺, Cu²⁺, Cr₂O₇²⁻, CrO₄²⁻ and nitrofurantoin (NFT).

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47

Roy, Ankita, Soumi Das, Sukriti Sacher, Sushil Kumar Mandal, and Partha Roy. "A rhodamine based biocompatible chemosensor for Al3+, Cr3+ and Fe3+ ions: extraordinary fluorescence enhancement and a precursor for future chemosensors." Dalton Transactions 48, no. 47 (2019): 17594–604. http://dx.doi.org/10.1039/c9dt03833g.

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48

Pršir, Kristina, Mislav Matić, Marlena Grbić, Gerhard J. Mohr, Svjetlana Krištafor, and Ivana Murković Steinberg. "Naphthalimide-Piperazine Derivatives as Multifunctional “On” and “Off” Fluorescent Switches for pH, Hg2+ and Cu2+ Ions." Molecules 28, no. 3 (January 28, 2023): 1275. http://dx.doi.org/10.3390/molecules28031275.

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Novel 1,8-naphthalimide-based fluorescent probes NI-1 and NI-2 were designed and screened for use as chemosensors for detection of heavy metal ions. Two moieties, methylpyridine (NI-1) and hydroxyphenyl (NI-2), were attached via piperazine at the C-4 position of the napthalimide core resulting in a notable effect on their spectroscopic properties. NI-1 and NI-2 are pH sensitive and show an increase in fluorescence intensity at around 525 nm (switch “on”) in the acidic environment, with pKa values at 4.98 and 2.91, respectively. Amongst heavy metal ions only Cu2+ and Hg2+ had a significant effect on the spectroscopic properties. The fluorescence of NI-1 is quenched in the presence of either Cu2+ or Hg2+ which is attributed to the formation of 1:1 metal-ligand complexes with binding constants of 3.6 × 105 and 3.9 × 104, respectively. The NI-1 chemosensor can be used for the quantification of Cu2+ ions in sub-micromolar quantities, with a linear range from 250 nM to 4.0 μM and a detection limit of 1.5 × 10−8 M. The linear range for the determination of Hg2+ is from 2 μM to 10 μM, with a detection limit of 8.8 × 10−8 M. Conversely, NI-2 behaves like a typical photoinduced electron transfer (PET) sensor for Hg2+ ions. Here, the formation of a complex with Hg2+ (binding constant 8.3 × 103) turns the green fluorescence of NI-2 into the “on” state. NI-2 showed remarkable selectivity towards Hg2+ ions, allowing for determination of Hg2+ concentration over a linear range of 1.3 μM to 25 μM and a limit of detection of 4.1 × 10−7 M.

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Zhang, Miao, Jiangfan Shi, Chenglong Liao, Qingyun Tian, Chuanyi Wang, Shuai Chen, and Ling Zang. "Perylene Imide-Based Optical Chemosensors for Vapor Detection." Chemosensors 9, no. 1 (December 22, 2020): 1. http://dx.doi.org/10.3390/chemosensors9010001.

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Perylene imide (PI) molecules and materials have been extensively studied for optical chemical sensors, particularly those based on fluorescence and colorimetric mode, taking advantage of the unique features of PIs such as structure tunability, good thermal, optical and chemical stability, strong electron affinity, strong visible light absorption and high fluorescence quantum yield. PI-based optical chemosensors have now found broad applications in gas phase detection of chemicals, including explosives, biomarkers of some food and diseases (such as organic amines (alkylamines and aromatic amines)), benzene homologs, organic peroxides, phenols and nitroaromatics, etc. In this review, the recent research on PI-based fluorometric and colorimetric sensors, as well as array technology incorporating multiple sensors, is reviewed along with the discussion of potential applications in environment, health and public safety areas. Specifically, we discuss the molecular design and aggregate architecture of PIs in correlation with the corresponding sensor performances (including sensitivity, selectivity, response time, recovery time, reversibility, etc.). We also provide a perspective summary highlighting the great potential for future development of PIs optical chemosensors, especially in the sensor array format that will largely enhance the detection specificity in complexed environments.

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Raker, Joseph, and Timothy E. Glass. "Cooperative Ratiometric Chemosensors: Pinwheel Receptors with an Integrated Fluorescence System." Journal of Organic Chemistry 66, no. 20 (October 2001): 6505–12. http://dx.doi.org/10.1021/jo001775t.

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