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Sebastian D, Ramakrishnan K. A coumarin-modified graphene quantum dot-based luminogen for the detection of cysteine in aqueous media. Photochem Photobiol 2024; 100:549-560. [PMID: 37960981 DOI: 10.1111/php.13875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/26/2023] [Accepted: 10/16/2023] [Indexed: 11/15/2023]
Abstract
A biocompatible fluorescence sensor for cysteine detection receives wide appreciation recently, because of its importance in the medical field. Functionalized graphene quantum dots (GQDs) are recently emerging biocompatible quantum dots, which are considered as suitable candidates for biomolecule detection. Motivated by this concept, here we have developed a versatile fluorescent probe based on 3-aminocoumarin (AMC) functionalized GQDs for the detection of cysteine (Cys). Modification on GQD with AMC resulted in a stable fluorescent probe with an enhancement in quantum yield of about 84% and 40 nm redshift in emission peak compared with bare GQD. The modified GQD is then used for the sensitive and selective detection of cysteine in aqueous media. The detection of Cys within the linear range of 50 nM to 1.5 μM was achieved with a detection limit (LOD) of 0.86 nM. Here, the AMC-GQD exhibit a turn-off fluorescence sensing behavior. The quenching mechanism was also explored. The sensing process follows dynamic quenching mechanism, which is attributed to the photoinduced charge transfer from AMC-GQD to Cys. The Stern-Volmer plot, energy-level alignment obtained from cyclic voltammetry measurements and density functional theory predictions give a valid proof for this. Furthermore, the sensor was applied efficiently to the determination of Cys in real water samples.
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Affiliation(s)
- Deepa Sebastian
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
| | - Kala Ramakrishnan
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, India
- Inter University Center for Nanomaterials and Devices, CUSAT, Kochi, India
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2
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Yao C, Hu Y, Liu Q, Liu JM, Ji X, Lv H, Wang S. Nanobody mediated dual-mode immunoassay for detection of peanut allergen Ara h 3. Food Chem 2024; 436:137679. [PMID: 37826894 DOI: 10.1016/j.foodchem.2023.137679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/26/2023] [Accepted: 10/04/2023] [Indexed: 10/14/2023]
Abstract
To improve the performance of peanut allergen Ara h 3 detection, depending on boron and nitrogen carbon dots (B/N-CDs), a nanobody (Nb) mediated dual-mode immunoassay was established, which combines the dominance of colorimetry with ratiometric fluorescence techniques. With the catalysis of Horseradish peroxidase (HRP), the oxidization of o-phenylenediamine (o-PD) in the presence of H2O2, leading to the production of yellow 2,3-diaminophenolazine (DAP) with an absorption peak at 431 nm. Owing to inner filter effect (IFE), DAP quenched the fluorescence of B/N-CDs at 426 nm, and it emerged a new emission peak at 549 nm. The fluorescence intensity ratio and absorption intensity can be utilized for quantitative analysis of Ara h 3 concentration. Under optimal conditions, the detection limits were 6.61 and 9.79 ng·mL-1, respectively. The dual-mode immunoassay was assessed containing specificity, stability, reproducibility, and practicability. This method paved the way for sensitive detection of Ara h 3 without background Interference.
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Affiliation(s)
- Chixuan Yao
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Yaozhong Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Qisijing Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Jing-Min Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Xuemeng Ji
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Huan Lv
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China.
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3
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Szlapa-Kula A, Kula S, Kaźmierski Ł, Biernasiuk A, Krawczyk P. Can a Small Change in the Heterocyclic Substituent Significantly Impact the Physicochemical and Biological Properties of ( Z)-2-(5-Benzylidene-4-oxo-2-thioxothiazolidin-3-yl)acetic Acid Derivatives? SENSORS (BASEL, SWITZERLAND) 2024; 24:1524. [PMID: 38475060 DOI: 10.3390/s24051524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/05/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024]
Abstract
Rhodanine-3-acetic acid derivatives are attractive compounds with versatile effects. What is very important is that compounds of this type have many biological properties. They are tested, among others, as fluorescent probes for bioimaging and aldose reductase inhibitors. Rhodanine-3-acetic acid derivatives also have antibacterial, antifungal and anticancer activity. The presented work demonstrates that a slight change in the five-membered heterocyclic substituent significantly affects the properties of the compounds under consideration. Three rhodanine-3-acetic acid derivatives (A-1-A-3) were obtained in the Knoevenagel condensation reaction with good yields, ranging from 54% to 71%. High thermal stability of the tested compounds was also demonstrated above 240 °C. The absorption and emission maxima in polar and non-polar solvents were determined. Then, the possibility of using the considered derivatives for fluorescence bioimaging was checked. Compounds A-1 and A-2 were successfully used as fluorescent dyes of fixed cells of mammalian origin. In addition, biological activity tests against bacteria and fungi were carried out. Our results showed that A-1 and A-2 showed the most excellent antimicrobial activity among the newly synthesized compounds, especially against Gram-positive bacteria.
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Affiliation(s)
- Agata Szlapa-Kula
- Institute of Chemistry, Faculty of Science and Technology, University of Silesia in Katowice, Szkolna 9 St., 40-007 Katowice, Poland
| | - Slawomir Kula
- Institute of Chemistry, Faculty of Science and Technology, University of Silesia in Katowice, Szkolna 9 St., 40-007 Katowice, Poland
| | - Łukasz Kaźmierski
- Urology and Andrology, Department of Tissue Engineering, Collegium Medicum, Nicolaus Copernicus University, M. Curie Skłodowskiej 9, 85-094 Bydgoszcz, Poland
| | - Anna Biernasiuk
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Medical University of Lublin, 20-093 Lublin, Poland
| | - Przemysław Krawczyk
- Department of Physical Chemistry, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University, Kurpińskiego 5, 85-950 Bydgoszcz, Poland
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Aswathy A, Vineetha PK, Kandathil V, Jose J, Bhat SG, Manoj N. A Simple Live Cell Imaging "Turn-On" Fluorescence Probe for the Selective and Sensitive Detection of Aqueous Hg 2+ Ions. J Fluoresc 2023:10.1007/s10895-023-03390-1. [PMID: 37594587 DOI: 10.1007/s10895-023-03390-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 08/09/2023] [Indexed: 08/19/2023]
Abstract
A simple, efficient, and reversible fluorescent sensor probe, PBA (2,6-dimethyl pyrone barbituric acid conjugate), comprised of a pro-aromatic donor conjugated with a barbituric acid, was developed for the detection of highly toxic mercuric ions. The probe showed high selectivity and "Turn-On" fluorescence response towards Hg2+ among various metal cations such as Na+, Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Ba2+, Hg2+, and Pb2+, in both homogeneous and microheterogeneous micelle medium sodium dodecyl sulphate (SDS). The binding stoichiometry, limit of detection (LOD), and binding constant for the PBA-Hg complex were determined. The mechanism of binding was ascertained using the N,N'-dimethylbarbituric acid conjugate of 2,6-dimethylpyran (PDMBA), where no binding interaction by deprotonation is possible. In the presence of cysteamine hydrochloride and trifluoroacetic acid (TFA), the complexation of Hg2+ with PBA was demonstrated to be reversible, indicating its potential for the development of reusable sensors. Moreover, the practical applicability of PBA in monitoring Hg2+ in living cells was also evaluated.
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Affiliation(s)
- Ajayakumar Aswathy
- Department of Applied Chemistry and Interuniversity Center for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi-22, Kerala, India
| | - Pookalavan Karicherry Vineetha
- Department of Applied Chemistry and Interuniversity Center for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi-22, Kerala, India
| | - Vishal Kandathil
- Department of Applied Chemistry and Interuniversity Center for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi-22, Kerala, India
| | - Jiya Jose
- Department of Biotechnology, Cochin University of Science and Technology, Kochi-22, Kerala, India
| | - Sarita G Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Kochi-22, Kerala, India
| | - Narayanapillai Manoj
- Department of Applied Chemistry and Interuniversity Center for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi-22, Kerala, India.
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Gunasekaran P, Immanuel David C, Shanmugam S, Ramanagul K, Rajendran R, Gothandapani V, Kannan VR, Prabhu J, Nandhakumar R. Positional Isomeric Symmetric Dipodal Receptors Dangled with Rotatable Binding Scaffolds: Fluorescent Sensing of Silver Ions and Sequential Detection of l-Histidine and Their Multifarious Applications. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:802-814. [PMID: 36548786 DOI: 10.1021/acs.jafc.2c05823] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Three simple dipodal artificial acyclic symmetric receptors, SDO, SDM, and SDP, driven by positional isomerism based on xylelene scaffolds were designed, synthesized, and characterized by 1H NMR, 13C NMR, and mass spectroscopy techniques. Probes SDO, SDM, and SDP demonstrated selective detection of Ag+ metal ions and amino acid l-histidine in a DMSO-H2O solution (1:1 v/v, HEPES 50 mM, pH = 7.4). The detection of Ag+ metal ions occurred in three ways: (i) inhibition of the photoinduced electron-transfer (PET) process, (ii) blueshifted fluorescence enhancement via the intramolecular charge-transfer (ICT) process, and (iii) restricted rotation of the dangling benzylic scaffold following coordination with a Ag+ metal ion. Job's plot analysis and quantum yields confirm the binding of probes to Ag+ in 1:1, 1:2, and 1:2 ratios with LODs and LOQs found to be 1.3 μM and 3.19 × 10-7 M, 6.40 × 10-7 and 2.44 × 10 -6 M, and 9.76 × 10-7 and 21.01 × 10-7 M, respectively. 1H NMR titration, HRMS, ESI-TOF, IR analysis, and theoretical DFT investigations were also used to establish the binding stoichiometry. Furthermore, the probes were utilized for the detection of Ag+ ions in water samples, food samples, soil analysis, and bacterial imaging in Escherichia coli cells and a molecular logic gate was constructed.
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Affiliation(s)
- Prabakaran Gunasekaran
- Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to Be University), Karunya Nagar, Coimbatore 641 114, India
| | - Charles Immanuel David
- Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to Be University), Karunya Nagar, Coimbatore 641 114, India
| | - Suresh Shanmugam
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb 10000, Croatia
| | | | - Ramya Rajendran
- Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India
| | | | - Velu Rajesh Kannan
- Department of Microbiology, Bharathidasan University, Tiruchirappalli 620 024, India
| | - Jeyaraj Prabhu
- Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to Be University), Karunya Nagar, Coimbatore 641 114, India
| | - Raju Nandhakumar
- Fluorensic Materials Lab, Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to Be University), Karunya Nagar, Coimbatore 641 114, India
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6
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Karuppannan S, Karmegam MV, Leslee DBC. A Phenothiazine‐Thiophene‐linked Chalcone as a Highly Sensitive Fluorescent Chemosensor for Ag
+
Ions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sekar Karuppannan
- Department of Science and Humanities (Chemistry) Anna University University College of Engineering, Dindigul – 624622 Tamilnadu India
| | - Muthu Vengaian Karmegam
- Department of Science and Humanities (Chemistry) Anna University University College of Engineering, Dindigul – 624622 Tamilnadu India
- PG and Research Department of Chemistry GTN Arts College (Autonomous), Dindigul – 624005 Tamilnadu India
| | - Denzil Britto Christopher Leslee
- Department of Science and Humanities (Chemistry) Anna University University College of Engineering, Dindigul – 624622 Tamilnadu India
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A chromo-fluorogenic HMT sensor for Ag + and the resultant HMT-Ag complex turn-off probe for F - in DMSO: experimental and theoretical studies. Heliyon 2021; 7:e06956. [PMID: 34027164 PMCID: PMC8121966 DOI: 10.1016/j.heliyon.2021.e06956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 02/24/2021] [Accepted: 04/26/2021] [Indexed: 11/24/2022] Open
Abstract
The photophysical properties of Hexamethylenetetramine (HMT) were investigated through physical methods and spectroscopically in dimethyl sulfoxide (DMSO) at ambient temperature. Evidently, HMT turned out as a sensor, selective and sensitive to silver ion (Ag+) only, among other cations, through colorimetric and fluorometric activities (observable by naked eye) and spectrally, both by UV-Vis and fluorescence spectroscopy. The resulting complex pedant (HMT-Ag) is highly responsive to the presence of fluoride ion (F−) in aqueous soluble DMSO, evidenced by changes in absorption spectra as well as fluorescence quenching, upon addition of the respective ions. Consequently, spectral changes induced by the addition of these ions, were consistently concomitant with colour changes, from colourless to light brown (HMT-Ag) to dark brown (HMT-Ag-F) in daylight condition, while bright light blue colour (HMT) to dark blue brownish (HMT-Ag) under UV-light conditions. The experimental results were complimented by theoretical studies, which are well within agreement of one another.
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8
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Vineetha PK, Krishnan A, Aswathy A, Chandrasekaran PO, Manoj N. Pyran based bipodal D–π–A systems: colorimetric and ratiometric sensing of mercury – experimental and theoretical approach. NEW J CHEM 2021. [DOI: 10.1039/d1nj01167g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reversible and selective Hg2+ ion complexation of the two pyran based colorimetric and fluorescent ratiometric probes.
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Affiliation(s)
- Pookalavan Karicherry Vineetha
- Department of Applied Chemistry, Centre of Excellence in Advanced Materials and Inter-University Centre for Nanomaterials and Devices, CUSAT, Kochi – 682022, Kerala, India
| | - Aravind Krishnan
- Department of Chemistry, St.Berchman's College, Changanassery – 686101, Kerala, India
| | - Ajayakumar Aswathy
- Department of Applied Chemistry, Centre of Excellence in Advanced Materials and Inter-University Centre for Nanomaterials and Devices, CUSAT, Kochi – 682022, Kerala, India
| | - Parvathy O. Chandrasekaran
- Department of Applied Chemistry, Centre of Excellence in Advanced Materials and Inter-University Centre for Nanomaterials and Devices, CUSAT, Kochi – 682022, Kerala, India
| | - Narayanapillai Manoj
- Department of Applied Chemistry, Centre of Excellence in Advanced Materials and Inter-University Centre for Nanomaterials and Devices, CUSAT, Kochi – 682022, Kerala, India
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