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Zhang Z, Zhang H, Hou L, Jia D, Yao K, Meng Q, Qu J, Yan B, Luan Q, Liu T. Highly sensitive fiber-optic chemical pH sensor based on surface modification of optical fiber with ZnCdSe/ZnS quantum dots. Anal Chim Acta 2024; 1294:342281. [PMID: 38336409 DOI: 10.1016/j.aca.2024.342281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/06/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024]
Abstract
The pH value plays a vital role in many biological and chemical reactions. In this work, the fiber-optic chemical pH sensors were fabricated based on carboxyl ZnCdSe/ZnS quantum dots (QDs) and tapered optical fiber. The photoluminescence (PL) intensity of QDs is pH-dependence because protonation and deprotonation can affect the process of electron-hole recombination. The evanescent wave of tapered optical fiber was used as excitation source in the process of PL. To obtain higher sensitivity, the end faces of fiber were optimized for cone region. By lengthening the cone region and shrinking the end diameter of optical fiber, evanescent wave was enhanced and the excitation times of QDs were increased, which improved the PL intensity and the sensitivity of the sensor. The sensitivity of sensor can reach as high as 0.139/pH in the range of pH 6.00-9.01. The surface functional modification was adopted to prepare sensing films. The carboxyl groups on the QDs ligands are chemically bonded to the fiber surface, which is good for response time (40 s) and stability (decreased 0.9 % for 5 min). These results demonstrated that ZnCdSe/ZnS QDs-based fiber-optic chemical pH sensors are promising approach in rapid and precise pH detection.
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Affiliation(s)
- Zongjie Zhang
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Hongxia Zhang
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China.
| | - Lili Hou
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Dagong Jia
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Kaixin Yao
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Qingyang Meng
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Jiayi Qu
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Bing Yan
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Qingxin Luan
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Tiegen Liu
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
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Chen WH, Armstrong E, Dillingham PW, Moratti SC, Ennis C, McGraw CM. Dual-Lifetime Referencing ( t-DLR) Optical Fiber Fluorescent pH Sensor for Microenvironments. SENSORS (BASEL, SWITZERLAND) 2023; 23:8865. [PMID: 37960564 PMCID: PMC10650387 DOI: 10.3390/s23218865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023]
Abstract
The pH behavior in the μm to cm thick diffusion boundary layer (DBL) surrounding many aquatic species is dependent on light-controlled metabolic activities. This DBL microenvironment exhibits different pH behavior to bulk seawater, which can reduce the exposure of calcifying species to ocean acidification conditions. A low-cost time-domain dual-lifetime referencing (t-DLR) interrogation system and an optical fiber fluorescent pH sensor were developed for pH measurements in the DBL interface. The pH sensor utilized dual-layer sol-gel coatings of pH-sensitive iminocoumarin and pH-insensitive Ru(dpp)3-PAN. The sensor has a dynamic range of 7.41 (±0.20) to 9.42 ± 0.23 pH units (95% CI, T = 20 °C, S = 35), a response time (t90) of 29 to 100 s, and minimal salinity dependency. The pH sensor has a precision of approximately 0.02 pHT units, which meets the Global Ocean Acidification Observing Network (GOA-ON) "weather" measurement quality guideline. The suitability of the t-DLR optical fiber pH sensor was demonstrated through real-time measurements in the DBL of green seaweed Ulva sp. This research highlights the practicability of optical fiber pH sensors by demonstrating real-time pH measurements of metabolic-induced pH changes.
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Affiliation(s)
- Wan-Har Chen
- Department of Chemistry, University of Otago, Dunedin 9054, New Zealand; (W.-H.C.); (S.C.M.); (C.E.)
| | - Evelyn Armstrong
- NIWA/University of Otago Centre for Oceanography, Department of Marine Science, University of Otago, Dunedin 9054, New Zealand;
| | - Peter W. Dillingham
- Department of Mathematics and Statistics, University of Otago, Dunedin 9054, New Zealand;
- Coastal People Southern Skies Centre of Research Excellence, University of Otago, Dunedin 9054, New Zealand
| | - Stephen C. Moratti
- Department of Chemistry, University of Otago, Dunedin 9054, New Zealand; (W.-H.C.); (S.C.M.); (C.E.)
| | - Courtney Ennis
- Department of Chemistry, University of Otago, Dunedin 9054, New Zealand; (W.-H.C.); (S.C.M.); (C.E.)
| | - Christina M. McGraw
- Department of Chemistry, University of Otago, Dunedin 9054, New Zealand; (W.-H.C.); (S.C.M.); (C.E.)
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Gayathry TC, Gaur M, Mishra L, Mishra M, Barooah N, Bhasikuttan AC, Mohanty J. Supramolecular assembly of coumarin 7 with sulfobutylether-β-cyclodextrin for biomolecular applications. Front Chem 2023; 11:1245518. [PMID: 37731459 PMCID: PMC10508339 DOI: 10.3389/fchem.2023.1245518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/21/2023] [Indexed: 09/22/2023] Open
Abstract
Coumarins, in general, exhibit a wide range of photophysical characteristics and are highly sensitive to their microenvironment, and, therefore, their fluorescence characteristics have attracted immense attention as sensors in chemical and biological systems. In the present study, the supramolecular interaction of a bichromophoric coumarin dye, namely, Coumarin 7 (C7) with sulfobutylether-β-cyclodextrin (SBE7βCD) macrocyclic host at different pH conditions has been investigated by using optical spectroscopic techniques such as absorption, steady-state and time-resolved emissions, and circular dichroism measurements and compared with that of βCD. Considerable enhancement in the fluorescence intensity and lifetime of C7 on complexation with SBE7βCD proposes that non-radiative processes like TICT behavior are strictly hindered due to the confinement in the host cavity experienced by the C7 dye. The increase in the rotational correlation time evaluated from the fluorescence anisotropy decay kinetics further confirms the formation of tightly bound inclusion complexes. The binding constant values reveal that the monocationic form of dye at pH 3 shows ∼3 times stronger interaction with SBE7βCD than the neutral form of dye at pH 7 due to strong electrostatic cation-anion interaction. SBE7βCD:C7 exhibits an improved photostability and an upward pK a shift of 0.4 unit compared to the contrasting downward pK a shift of 0.5 with the βCD. The enhanced fluorescence yield and increased photostability have been exploited for bioimaging applications, and better images were captured by staining the Drosophila fly gut with the SBE7βCD:C7 complex. The enhancement in the binding interaction and the emission intensity were found to be responsive to external stimuli such as small competitive binders or metal ions and nearly quantitative dissociation of the complex was demonstrated to release the dye and would find stimuli-responsive applications.
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Affiliation(s)
- T. C. Gayathry
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Monika Gaur
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
| | - Lopamudra Mishra
- Department of Life Science, National Institute of Technology Rourkela, Rourkela, India
| | - Monalisa Mishra
- Department of Life Science, National Institute of Technology Rourkela, Rourkela, India
| | - Nilotpal Barooah
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
| | - Achikanath C. Bhasikuttan
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
| | - Jyotirmayee Mohanty
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Mumbai, India
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Liu C, Liu Q, Cai S, He S, Zhao L, Zeng X, Gong J. Near-infrared fluorescent probe for sensing local microscopic extreme acidity and its application in mitochondria. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Development of an ‘OFF-ON-OFF’ colorimetric and fluorometric pH sensor for the study of physiological pH and its bioimaging application. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132147] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Liu Q, Liu C, Cai S, He S, Zhao L, Zeng X, Zhou J, Gong J. A new near-infrared fluorescent probe for sensing extreme acidity and bioimaging in lysosome. Methods Appl Fluoresc 2022; 10. [PMID: 35073535 DOI: 10.1088/2050-6120/ac4e73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 01/24/2022] [Indexed: 11/12/2022]
Abstract
Since the intracellular pH plays an important role in the physiological and pathological processes, however, the probes that can be used for monitoring pH fluctuation under extreme acidic conditions are currently rare, so it is necessary to construct fluorescent probes for sensing pH less than 4. In this work, we developed a new near-infrared (NIR) fluorescent probe Cy-SNN for sensing pH fluctuation under extremely acidic conditions. For the preparation of this probe, benzothiozolium moiety was chosen as lysosomal targeting unit and NIR fluorophore, and barbituric acid moiety was fused in the polymethine chain of probe to introduce protonation center. Surprisingly, on the basis of the balance of quaternary ammonium salts and free amines, the pKa value of Cy-SNN was calculated as low as 2.96, implying that Cy-SNN can be used in acidic conditions with pH < 4. Moreover, Cy-SNN exhibited highly selective response to H+ over diverse analytes in real-time with dependable reversibility. Importantly, Cy-SNN can be used to specifically target lysosome, providing potential tools for monitoring the function of lysosome in autophagy process.
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Affiliation(s)
- Qiuchen Liu
- Tianjin University of Technology, Tianjin, 300384,, Tianjin, 300191, CHINA
| | - Chang Liu
- Tianjin University of Technology, Tianjin, 300384, Tianjin, 300191, CHINA
| | - Songtao Cai
- Shenzhen University, Shenzhen 518060, Shenzhen, Guangdong, 518060, CHINA
| | - Song He
- Tianjin University of Technology, Tianjin, 300384, Tianjin, 300384, CHINA
| | - Liancheng Zhao
- School of Material Science and Engineering, Harbin Institute of Technology, PO Box 433, 92 West Dazhi Street, Harbin 150001, Harbin, 150001, CHINA
| | - Xianshun Zeng
- Tianjin University of Technology, Tianjin, Tianjin, 300384, CHINA
| | - Jin Zhou
- Weifang Medical University, Baotong West Street 7166, Weifang, 261053, CHINA
| | - Jin Gong
- Weifang Medical University, Baotong West Street 7166, Weifang, Shandong, 261053, CHINA
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Huda ZU, Mansha A, Asim S, Shahzad A. Effect of pH on Fluorescence Spectra of Coumarin Derivatives. J Fluoresc 2021; 32:57-66. [PMID: 34648128 DOI: 10.1007/s10895-021-02829-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/16/2021] [Indexed: 11/30/2022]
Abstract
Colourless crystalline solid coumarin with a bitter taste and sweet vanilla-like odor mostly acts as chemical protection against predators in plants. Anticoagulants (blood thinners), anti-fungicidal, anti-tumor and anti-inflammatory properties of coumarin are all used to treat skin diseases. Because of internal charge transfer (ICT), coumarin molecules displayed a solvatochromic effect in various solvents of varying polarity. The emission wavelength dependent fluorescence intensity was also affected by pH.
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Affiliation(s)
- Zain Ul Huda
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan
| | - Asim Mansha
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Sadia Asim
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan.
| | - Alina Shahzad
- Department of Chemistry, Government College Women University, Faisalabad, Pakistan
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Werner J, Belz M, Klein KF, Sun T, Grattan KTV. Characterization of a fast response fiber-optic pH sensor and illustration in a biological application. Analyst 2021; 146:4811-4821. [PMID: 34195717 DOI: 10.1039/d1an00631b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Optical, and especially fiber-optic techniques for the sensing of pH have become very attractive and considerable research progress in this field has been made over recent years. The determination of the value of pH across a broad range of applications today, important for areas of study such as life sciences, environmental monitoring, manufacturing industry and widely in biological research is now accessible from such optical sensors. The need for such technology arises because familiar, commercial sensors are often limited in terms of their response time and the presence of drift, all of which emphasize the value of newer and rapidly developing technologies such as fiber-optic sensors, to address these wider applications. As a result, a new compact sensor design has been developed, designed around a specially-formed fiber-optic tip, coated with a pH-sensitive dye, and importantly covalently linked to a hydrogel matrix to provide high stability. The sensor developed was designed to have a very fast response time (to 90% of saturation, Δt90) of <5 s and a sensing uncertainty of ∼±0.04 pH units. Given the covalently bonded nature of the dye, the problem of leaching of the indicator dye is reduced, creating a probe which has been shown to be very stable over many days of use. Illustrating this through extended continuous use, over ∼12 h at pH 7, this stability was confirmed showing a drift of <0.05 pH h-1. In order to give an illustration of the value of the probe in an important biological application, the monitoring of pH levels between pH 7 to pH 8 in an AMES' medium, a substance which is important to maintain the metabolism of retinal cells is shown and the results as well as temperature stability of the probe discussed.
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Affiliation(s)
- Jan Werner
- School of Mathematics, Computer Science and Engineering, City, University of London, Northampton Square, EC1 V 0HB, London, UK.
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Steinegger A, Wolfbeis OS, Borisov SM. Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications. Chem Rev 2020; 120:12357-12489. [PMID: 33147405 PMCID: PMC7705895 DOI: 10.1021/acs.chemrev.0c00451] [Citation(s) in RCA: 181] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Indexed: 12/13/2022]
Abstract
This is the first comprehensive review on methods and materials for use in optical sensing of pH values and on applications of such sensors. The Review starts with an introduction that contains subsections on the definition of the pH value, a brief look back on optical methods for sensing of pH, on the effects of ionic strength on pH values and pKa values, on the selectivity, sensitivity, precision, dynamic ranges, and temperature dependence of such sensors. Commonly used optical sensing schemes are covered in a next main chapter, with subsections on methods based on absorptiometry, reflectometry, luminescence, refractive index, surface plasmon resonance, photonic crystals, turbidity, mechanical displacement, interferometry, and solvatochromism. This is followed by sections on absorptiometric and luminescent molecular probes for use pH in sensors. Further large sections cover polymeric hosts and supports, and methods for immobilization of indicator dyes. Further and more specific sections summarize the state of the art in materials with dual functionality (indicator and host), nanomaterials, sensors based on upconversion and 2-photon absorption, multiparameter sensors, imaging, and sensors for extreme pH values. A chapter on the many sensing formats has subsections on planar, fiber optic, evanescent wave, refractive index, surface plasmon resonance and holography based sensor designs, and on distributed sensing. Another section summarizes selected applications in areas, such as medicine, biology, oceanography, bioprocess monitoring, corrosion studies, on the use of pH sensors as transducers in biosensors and chemical sensors, and their integration into flow-injection analyzers, microfluidic devices, and lab-on-a-chip systems. An extra section is devoted to current challenges, with subsections on challenges of general nature and those of specific nature. A concluding section gives an outlook on potential future trends and perspectives.
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Affiliation(s)
- Andreas Steinegger
- Institute
of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Otto S. Wolfbeis
- Institute
of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
| | - Sergey M. Borisov
- Institute
of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
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Farafonov VS, Lebed AV, Mchedlov-Petrossyan NO. Computing p Ka Shifts Using Traditional Molecular Dynamics: Example of Acid-Base Indicator Dyes in Organized Solutions. J Chem Theory Comput 2020; 16:5852-5865. [PMID: 32786914 DOI: 10.1021/acs.jctc.0c00231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A compound's acidity constant (Ka) in a given medium determines its protonation state and, thus, its behavior and physicochemical properties. Therefore, it is among the key characteristics considered during the design of new compounds for the needs of advanced technology, medicine, and biological research, a notable example being pH sensors. The computational prediction of Ka for weak acids and bases in homogeneous solvents is presently rather well developed. However, it is not the case for more complex media, such as microheterogeneous solutions. The constant-pH molecular dynamics (MD) method is a notable contribution to the solution of the problem, but it is not commonly used. Here, we develop an approach for predicting Ka changes of weak small-molecule acids upon transfer from water to colloid solutions by means of traditional classical molecular dynamics. The approach is based on free energy (ΔG) computations and requires limited experiment data input during calibration. It was successfully tested on a series of pH-sensitive acid-base indicator dyes in micellar solutions of surfactants. The difficulty of finite-size effects affecting ΔG computation between states with different total charges is taken into account by evaluating relevant corrections; their impact on the results is discussed, and it is found non-negligible (0.1-0.4 pKa units). A marked bias is found in the ΔG values of acid deprotonation, as computed from MD, which is apparently caused by force-field issues. It is hypothesized to affect the constant-pH MD and reaction ensemble MD methods as well. Consequently, for these methods, a preliminary calibration is suggested.
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Affiliation(s)
- Vladimir S Farafonov
- V. N. Karazin Kharkiv National University, 4 Svoboda Square, Kharkiv 61022, Ukraine
| | - Alexander V Lebed
- V. N. Karazin Kharkiv National University, 4 Svoboda Square, Kharkiv 61022, Ukraine
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Alizadeh A, Farajpour B, Mohammadi SS, Sedghi M, Naderi‐Manesh H, Janiak C, Knedel T. Design and Synthesis of Coumarin‐Based Pyrazolopyridines as Biocompatible Fluorescence Dyes for Live‐Cell Imaging. ChemistrySelect 2020. [DOI: 10.1002/slct.202002289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Abdolali Alizadeh
- Department of Chemistry Tarbiat Modares University P. O. Box 14115-175 Tehran Iran
| | - Behnaz Farajpour
- Department of Chemistry Tarbiat Modares University P. O. Box 14115-175 Tehran Iran
| | - Sanam Sadeghi Mohammadi
- Department of Nanobiotechnology/Biophysics Tarbiat Modares University P. O. Box 14115-175 Tehran Iran
| | - Mosslim Sedghi
- Department of Nanobiotechnology/Biophysics Tarbiat Modares University P. O. Box 14115-175 Tehran Iran
| | - Hossein Naderi‐Manesh
- Department of Nanobiotechnology/Biophysics Tarbiat Modares University P. O. Box 14115-175 Tehran Iran
| | - Christoph Janiak
- Heinrich-Heine-Universität Düsseldorf Institut für Anorganische Chemie und Strukturchemie, I 40225 Düsseldorf
| | - Tim‐Oliver Knedel
- Heinrich-Heine-Universität Düsseldorf Institut für Anorganische Chemie und Strukturchemie, I 40225 Düsseldorf
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Mdluli V, Diluzio S, Lewis J, Kowalewski JF, Connell TU, Yaron D, Kowalewski T, Bernhard S. High-throughput Synthesis and Screening of Iridium(III) Photocatalysts for the Fast and Chemoselective Dehalogenation of Aryl Bromides. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02247] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Velabo Mdluli
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Stephen Diluzio
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Jacqueline Lewis
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Jakub F. Kowalewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Timothy U. Connell
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - David Yaron
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Tomasz Kowalewski
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Stefan Bernhard
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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Colorimetric Visualization Using Polymeric Core-Shell Nanoparticles: Enhanced Sensitivity for Formaldehyde Gas Sensors. Polymers (Basel) 2020; 12:polym12050998. [PMID: 32344883 PMCID: PMC7285312 DOI: 10.3390/polym12050998] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/10/2020] [Accepted: 04/21/2020] [Indexed: 11/16/2022] Open
Abstract
Although equipment-based gas sensor systems (e.g., high-performance liquid chromatography) have been widely applied for formaldehyde gas detection, pre-treatment and expensive instrumentation are required. To overcome these disadvantages, we developed a colorimetric sensor based on polymer-based core–shell nanoparticles (PCSNPs), which are inexpensive, stable, and exhibit enhanced selectivity. Spherical and uniform poly(styrene-co-maleic anhydride) (PSMA)/polyethyleneimine (PEI) core–shell nanoparticles were prepared and then impregnated with Methyl Red (MR), Bromocresol Purple (BCP), or 4-nitrophenol (4-NP) to construct colorimetric sensors for formaldehyde gas. The intrinsic properties of these dyes were maintained when introduced into the PCSNPs. In the presence of formaldehyde, the MR, BCP, and 4-NP colorimetric sensors changed to yellow, red, and gray, respectively. The colorimetric response was maximized at a PEI/PSMA ratio of four, likely owing to the high content of amine groups. Effective formaldehyde gas detection was achieved at a relative humidity of 30% using the MR colorimetric sensor, which exhibited a large color change (92%) in 1 min. Advantageously, this stable sensor allowed sensitive and rapid naked-eye detection of low formaldehyde concentrations (0.5 ppm). Hence, this approach is promising for real-time formaldehyde gas visualization and can also be adapted to other colorimetric gas sensor systems to improve sensitivity and simplicity.
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14
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A photometric pH assay for microplate bacterial cultures. J Microbiol Methods 2020; 172:105910. [PMID: 32229266 DOI: 10.1016/j.mimet.2020.105910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 11/20/2022]
Abstract
A photometric pH assay for sugar-fermenting bacterial culture on a 96-well plate was developed. This assay can save time and effort in repeat handlings. Its use could decrease the risk of bacterial contamination in measurement devices and leakage into the environment. The assay's pH estimation range was pH 4.2-7.6.
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Duong HD, Shin Y, Rhee JI. Development of novel optical pH sensors based on coumarin 6 and nile blue A encapsulated in resin particles and specific support materials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 107:110323. [DOI: 10.1016/j.msec.2019.110323] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 09/02/2019] [Accepted: 10/14/2019] [Indexed: 10/25/2022]
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18
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Sarma P, Patir K, Sarmah KK, Gogoi SK, Thakuria R, Das PJ. Stimuli-responsive aggregation-induced fluorescence in a series of biphenyl-based Knoevenagel products: effects of substituent active methylene groups on π-π interactions. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2019; 75:775-783. [PMID: 32830756 DOI: 10.1107/s2052520619009156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/26/2019] [Indexed: 06/11/2023]
Abstract
A series of three biphenyl-based Knoevenagel products (denoted 1a, 1b, 1c) with active methylene groups has been synthesized. Compounds 1a and 1b show strong solid-state fluorescence, whereas 1c displays low emission. Effects of substituent groups in condensed phase packing of the molecules have been investigated and correlated with their photophysical properties. Interestingly, compound 1a exhibits mechanofluorochromism with emission color changes from yellow to green (wavelength shift of 40 nm) after mechanical grinding. Furthermore, fluorescence of 1a and 1b is turned off under alkaline conditions, making them potential candidates for aggregation-enhanced emission-based pH sensors.
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Affiliation(s)
- Parishmita Sarma
- Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
| | - Khemnath Patir
- Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
| | | | - Sonit Kumar Gogoi
- Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
| | - Ranjit Thakuria
- Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
| | - Pranab Jyoti Das
- Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
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19
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Duong HD, Shin Y, Rhee JI. Development of fluorescent pH sensors based on a sol-gel matrix for acidic and neutral pH ranges in a microtiter plate. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Im H, Hong S, Lee Y, Lee H, Kim S. A Colorimetric Multifunctional Sensing Method for Structural-Durability-Health Monitoring Systems. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1807552. [PMID: 30985020 DOI: 10.1002/adma.201807552] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 03/21/2019] [Indexed: 06/09/2023]
Abstract
A colorimetric multifunctional phototransmittance-based structural durability monitoring system is developed. The system consists of an array with four indium gallium zinc oxide (IGZO)-based phototransistors, a light source at a wavelength of 405 nm through a side-emitting optical fiber, and pH- and Cl-selective color-variable membranes. Under illumination at the wavelength of 405 nm at corrosion status, the pH- and Cl-responsive membrane, showing a change in their color, generates a change in the intensity of the transmitted light, which is received by the phototransistor array in the form of an electrical current. Ids and R (Ids /IpH 12 ) are inversely proportional to the pH, which ranges from 10 to 12. When the pH drops from 12 to 10, the magnitude of Ids and R increases to ≈103 . In the case of Cl detection, Ids and R (Ids /ICl 0 wt% ) increase nearly 50 times with an increase in Cl concentration of 0.05 wt%, and when the Cl concentration reaches 0.30 wt%, Ids and R increase to ≈103 times greater. This multifunctional colorimetric durability sensing system demonstrates considerable potential as a novel smart-diagnostic tool of structural durability with high stability, high sensitivity, and multifunction.
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Affiliation(s)
- Healin Im
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 440-745, Republic of Korea
| | - Seongin Hong
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 440-745, Republic of Korea
| | - Yunsu Lee
- Department of Architectural Engineering, Hanyang University, Sangnok-gu, Ansan, 426-791, Republic of Korea
| | - Hanseung Lee
- Department of Architectural Engineering, Hanyang University, Sangnok-gu, Ansan, 426-791, Republic of Korea
| | - Sunkook Kim
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 440-745, Republic of Korea
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21
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Nguyen TH, Sun T, Grattan KTV. A Turn-On Fluorescence-Based Fibre Optic Sensor for the Detection of Mercury. SENSORS (BASEL, SWITZERLAND) 2019; 19:E2142. [PMID: 31075827 PMCID: PMC6539747 DOI: 10.3390/s19092142] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/01/2019] [Accepted: 05/02/2019] [Indexed: 12/26/2022]
Abstract
The design, development, and evaluation of an optical fibre sensor for the detection of Hg2+ in aqueous media are discussed in detail in this paper. A novel fluorescent polymeric material for Hg2+ detection, based on a coumarin derivative (acting as the fluorophore) and an azathia crown ether moiety (acting as the mercury ion receptor), has been synthesized. The fluorophore was covalently immobilized onto the fibre surface by polymerisation using the ion imprinting technique and exhibited a significant increase in fluorescence intensity in response to Hg2+ via a photoinduced electron transfer (PET) mechanism. The sensor provided a response over a concentration range of 0-28 µM with an acceptable response rate of around 11 min and a recovery rate of around 30 min in a Tris-EDTA buffer solution. A detection limit of 0.15 µM was obtained with a possibility of improvement by changing the thickness of the polymer layer and using a more sensitive detector. High-quality performance is seen through a high selectivity for Hg2+ over other metal ions, excellent photo-stability and reversibility which was also demonstrated, making this type of sensor potentially well suited for in-situ monitoring of mercury in the environment.
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Affiliation(s)
- T Hien Nguyen
- Photonics and Instrumentation Research Centre, City University of London, London EC1V 0HB, UK.
| | - Tong Sun
- Photonics and Instrumentation Research Centre, City University of London, London EC1V 0HB, UK.
| | - Kenneth T V Grattan
- Photonics and Instrumentation Research Centre, City University of London, London EC1V 0HB, UK.
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22
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An efficient one-pot three-component synthesis of 2-(4-(2-oxo-2H-chromen-3-yl)thiazol-2-yl)-3-arylacrylonitriles and their cytotoxic activity evaluation with molecular docking. JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2018.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Wencel D, Kaworek A, Abel T, Efremov V, Bradford A, Carthy D, Coady G, McMorrow RCN, McDonagh C. Optical Sensor for Real-Time pH Monitoring in Human Tissue. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803627. [PMID: 30427575 DOI: 10.1002/smll.201803627] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/29/2018] [Indexed: 05/21/2023]
Abstract
This article reports on a fiber-based ratiometric optical pH sensor for use in real-time and continuous in vivo pH monitoring in human tissue. Stable hybrid sol-gel-based pH sensing material is deposited on a highly flexible plastic optical fiber tip and integrated with excitation and detection electronics. The sensor is extensively tested in a laboratory environment before it is applied in vivo in a human model. The pH sensor performance in the laboratory environment outperforms the state-of-the-art reported in the current literature. It exhibits the highest sensitivity in the physiological pH range, resolution of 0.0013 pH units, excellent sensor to sensor reproducibility, long-term stability, short response time of <2 min, and drift of 0.003 pH units per 22 h. The sensor also exhibits promising performance in in vitro whole blood samples. In addition, human evaluations conducted under this project demonstrate successful short-term deployment of this sensor in vivo.
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Affiliation(s)
- Dorota Wencel
- School of Physical Science, Biomedical Diagnostic Institute, Dublin City University (DCU), Dublin 9, Ireland
| | - Alicja Kaworek
- BlueBridge Technologies, 3015 Lake Drive, Citywest Campus, Citywest, Dublin 24, Ireland
| | - Tobias Abel
- Roche Diagnostics International, Rotkreuz, Switzerland
| | - Vitaly Efremov
- Biomedical Diagnostic Institute, DCU, Dublin 9, 6343, Ireland
| | - Aidan Bradford
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
| | - Denise Carthy
- Biomedical Diagnostic Institute, DCU, Dublin 9, 6343, Ireland
| | - Garret Coady
- BlueBridge Technologies, 3015 Lake Drive, Citywest Campus, Citywest, Dublin 24, Ireland
| | | | - Colette McDonagh
- School of Physical Science, Biomedical Diagnostic Institute, Dublin City University (DCU), Dublin 9, Ireland
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24
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Synthesis of isomeric coumarin-fluorene hybrids by photocyclization and the photophysical features. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Waleed Al-Qaysi W, Duerkop A. A luminescent europium complex for wide-range pH sensors and sensor microtiterplates. Analyst 2018; 143:3176-3183. [DOI: 10.1039/c8an00775f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Luminescent sensor membranes and sensor microplates are presented for continuous or high-throughput wide-range measurement of pH based on a europium probe.
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Affiliation(s)
- Wafaa Waleed Al-Qaysi
- Institute of Analytical Chemistry
- Chemo and Biosensors
- University of Regensburg
- 93040 Regensburg
- Germany
| | - Axel Duerkop
- Institute of Analytical Chemistry
- Chemo and Biosensors
- University of Regensburg
- 93040 Regensburg
- Germany
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26
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Barooah N, Khurana R, Mohanty J, Bhasikuttan AC. Modulation of Protolytic Equilibrium of Bichromophoric Coumarin-30 Dye with Cucurbit[8]uril Encapsulation. ChemistrySelect 2017. [DOI: 10.1002/slct.201700961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nilotpal Barooah
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Raman Khurana
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
- Homi Bhabha National Institute, Anushaktinagar; Mumbai 400094 India
| | - Jyotirmayee Mohanty
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
- Homi Bhabha National Institute, Anushaktinagar; Mumbai 400094 India
| | - Achikanath C. Bhasikuttan
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
- Homi Bhabha National Institute, Anushaktinagar; Mumbai 400094 India
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27
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Gotor R, Ashokkumar P, Hecht M, Keil K, Rurack K. Optical pH Sensor Covering the Range from pH 0-14 Compatible with Mobile-Device Readout and Based on a Set of Rationally Designed Indicator Dyes. Anal Chem 2017; 89:8437-8444. [PMID: 28696681 DOI: 10.1021/acs.analchem.7b01903] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this work, a family of pH-responsive fluorescent probes has been designed in a rational manner with the aid of quantum chemistry tools, covering the entire pH range from 0-14. Relying on the boron-dipyrromethene (BODIPY) core, all the probes as well as selected reference dyes display very similar spectroscopic properties with ON-OFF fluorescence switching responses, facilitating optical readout in simple devices used for detection and analysis. Embedding of the probes and reference dyes into hydrogel spots on a plastic strip yielded a test strip that reversibly indicates pH with a considerably small uncertainty of ∼0.1 pH units. These strips are not only reusable but, combined with a 3D-printed case that can be attached to a smartphone, the USB port of which drives the integrated LED used for excitation, allows for autonomous operation in on-site or in-the-field applications; the developed Android application software ("app") further simplifies operation for unskilled users.
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Affiliation(s)
- Raúl Gotor
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM) , Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Pichandi Ashokkumar
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM) , Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Mandy Hecht
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM) , Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Karin Keil
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM) , Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
| | - Knut Rurack
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM) , Richard-Willstätter-Strasse 11, 12489 Berlin, Germany
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28
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Naik NS, Shastri LA, Bathula C, Chougala B, Shastri S, Holiyachi M, Sunagar V. Synthesis, Characterization and Photophysical Studies of Tricoumarin-Pyridines. J Fluoresc 2017; 27:419-425. [PMID: 28070796 DOI: 10.1007/s10895-016-2018-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 12/29/2016] [Indexed: 10/20/2022]
Abstract
A series of novel tricoumarin-pyridines have been synthesized by the reaction of 4-formyl coumarins and substituted 3-acetylcoumarin with ammonium acetate for the application in organic electronics as well as fluorescent dyes. The structures of all new compounds were confirmed and characterized by IR, 1H NMR and ESI-Mass analysis. All the important photo physical prerequisites for organic electronic application such as strong and broad optical absorption, thermal stability were determined for the synthesized molecules. Optical properties were studied by UV-Vis absorption and fluorescence spectroscopy. Optical band gaps of the tricoumarin-pyridines were found to be 2.72-3.10 eV as calculated from their onset absorption edge. The tricoumarin-pyridines were thermally stable up to 290-370 °C as determined by thermogravimetric analysis (TGA). Photophysical studies indicate the synthesized materials are promising candidates for organic electronic applications.
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Affiliation(s)
- Nirmala S Naik
- Department of Chemistry, Karnatak University, Dharwad, 580 003, India
| | - Lokesh A Shastri
- Department of Chemistry, Karnatak University, Dharwad, 580 003, India.
| | - Chinna Bathula
- Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea. .,Institute of Nanoscience and Technology, Hanyang University, Seoul, 133-791, Republic of Korea.
| | - Bahubali Chougala
- Department of Chemistry, Karnatak University, Dharwad, 580 003, India
| | | | | | - Vinay Sunagar
- Department of Chemistry, G.S.S. College, Belagavi, Karnataka, India
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29
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Yamaji M, Hakoda Y, Okamoto H, Tani F. Photochemical synthesis and photophysical properties of coumarins bearing extended polyaromatic rings studied by emission and transient absorption measurements. Photochem Photobiol Sci 2017; 16:555-563. [DOI: 10.1039/c6pp00399k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coumarins having expanded π-electron systems were prepared via a photocondensation process and the photophysical features in solution were investigated based on emission and transient absorption measurements.
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Affiliation(s)
- Minoru Yamaji
- Division of Molecular Science
- Graduate School of Science and Engineering
- Gunma University
- Kiryu
- Japan
| | - Yuma Hakoda
- Education Program of Materials and Bioscience
- Graduate School of Science and Engineering
- Gunma University
- Kiryu
- Japan
| | - Hideki Okamoto
- Division of Earth
- Life
- and Molecular Sciences
- Graduate School of Natural Science and Technology
- Okayama University
| | - Fumito Tani
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
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30
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Luo W, Jiang H, Tang X, Liu W. A reversible ratiometric two-photon lysosome-targeted probe for real-time monitoring of pH changes in living cells. J Mater Chem B 2017; 5:4768-4773. [DOI: 10.1039/c7tb00838d] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A reversible ratiometric two-photon lysosome-targeted probe that can monitor real-time pH changes in living cells.
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Affiliation(s)
- Weifang Luo
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Huie Jiang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiaoliang Tang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Weisheng Liu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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31
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Makhal K, Goswami D. pH Effect on Two-Photon Cross Section of Highly Fluorescent Dyes Using Femtosecond Two-Photon Induced Fluorescence. J Fluoresc 2016; 27:339-356. [DOI: 10.1007/s10895-016-1963-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 10/19/2016] [Indexed: 01/02/2023]
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32
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Imit M, Imin P, Adronov A. π-Conjugated polymers with pendant coumarins: design, synthesis, characterization, and interactions with carbon nanotubes. CAN J CHEM 2016. [DOI: 10.1139/cjc-2016-0205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A series of new fluorene-based π-conjugated polymers having coumarin derivatives as part of dendritic side chains were designed and prepared using the Suzuki–Miyaura cross-coupling reaction. A new coumarin derivative bearing a heptyl side chain for solubility was utilized to ensure solubility of the final polymers. It was found that fluorescence resonance energy transfer (FRET) from the coumrains to the polyfluorene backbone was efficient, especially for the polymers decorated with lower-generation dendrons. Each of the polymers was found to interact strongly with the surface of single-walled carbon nanotubes (SWNTs) in THF, and their ability to selectively disperse specific SWNT chiralities was investigated. Photoluminescence studies revealed that the strong polymer emission is efficiently quenched in the corresponding supramolecular complexes with SWNTs. This high quenching efficiency indicates that the coumarin–polymer FRET system can be supramolecularly bound to the surface of (SWNTs to produce an energy transfer system in which the energy absorbed by the donor coumarin chromophores is channeled to the SWNTs.
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Affiliation(s)
- Mokhtar Imit
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Patigul Imin
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Alex Adronov
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Chemistry and Chemical Biology, the Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON L8S 4L8, Canada
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33
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Cheng J, Gou F, Zhang X, Shen G, Zhou X, Xiang H. A Class of Multiresponsive Colorimetric and Fluorescent pH Probes via Three Different Reaction Mechanisms of Salen Complexes: A Selective and Accurate pH Measurement. Inorg Chem 2016; 55:9221-9. [DOI: 10.1021/acs.inorgchem.6b01212] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jinghui Cheng
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Fei Gou
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Xiaohong Zhang
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Guangyu Shen
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Xiangge Zhou
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Haifeng Xiang
- College of Chemistry, Sichuan University, Chengdu 610041, China
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34
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Vodolazhenko MA, Gorobets NY, Zhikol OA, Desenko SM, Shishkin OV. A quantum chemical approach towards understanding stability and tautomerism of 2-imino-2H-pyran derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra08873b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The ring-chain tautomerism of 2-imino-2H-pyran derivatives annelated with an aromatic or aliphatic ring and their transformation into corresponding 2-pyridons were studied based on the relative stabilities of two series of model isomers calculated by the DFT method.
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Affiliation(s)
| | | | - Oleg A. Zhikol
- SSI “Institute for Single Crystals”
- NAS of Ukraine
- 61001 Kharkiv
- Ukraine
| | - Sergey M. Desenko
- SSI “Institute for Single Crystals”
- NAS of Ukraine
- 61001 Kharkiv
- Ukraine
| | - Oleg V. Shishkin
- SSI “Institute for Single Crystals”
- NAS of Ukraine
- 61001 Kharkiv
- Ukraine
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35
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Kandasamy K, Ganesabaskaran S, Pachamuthu MP, Ramanathan A. A novel pyrazole biscoumarin based chemosensors for the selective detection of Cu(2+) and Zn(2+) ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 148:184-188. [PMID: 25879988 DOI: 10.1016/j.saa.2015.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 04/03/2015] [Accepted: 04/05/2015] [Indexed: 06/04/2023]
Abstract
A novel chemosensor based on pyrazole biscoumarin molecule "4-hydroxy-3-((4-hydroxy-2-oxo-2H-chromen-3-yl)(1,3-diphenyl-1H-pyrazol-4-yl)methyl)-2H-chromen-2-one" (PBC) was synthesized by a simple method. The chemosensing properties of PBC towards transition metal ions like Cu(2+) and Zn(2+) by naked eye, UV-Visible and fluorescence spectroscopic methods were described. The PBC solution with Cu(2+) and Zn(2+) ion showed brown and blue colour respectively. The UV-Visible spectra of PBC with Cu(2+) and Zn(2+) ions exposed their corresponding absorption maxima. Further, the Job's plot method confirmed the 1:1 and 2:1 stoichiometry of the complex formation between the PBC with Cu(2+) and Zn(2+) ions respectively. The fluorescence enhancement of PBC on binding with Cu(2+) and Zn(2+) is due to the inhibition of photo induced electron transfer mechanism.
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Affiliation(s)
- Karthikeyan Kandasamy
- Department of Chemistry, University College of Engineering Tindivanam (a Constituent College of Anna University Chennai), Melpakkam 604001, India
| | - Sivaprasad Ganesabaskaran
- Department of Chemistry, University College of Engineering Tindivanam (a Constituent College of Anna University Chennai), Melpakkam 604001, India.
| | - Muthusamy Poomalai Pachamuthu
- Department of Chemistry, University College of Engineering Tindivanam (a Constituent College of Anna University Chennai), Melpakkam 604001, India; Department of Chemistry, Anna University, Chennai 600025, India
| | - Anand Ramanathan
- Center for Environmentally Beneficial Catalysis (CEBC), The University of Kansas, Lawrence, KS 66047, USA.
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36
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Aggarwal K, Khurana JM. Indeno–furan based colorimetric and on–off fluorescent pH sensors. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.04.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Strobl M, Rappitsch T, Borisov SM, Mayr T, Klimant I. NIR-emitting aza-BODIPY dyes – new building blocks for broad-range optical pH sensors. Analyst 2015; 140:7150-3. [DOI: 10.1039/c5an01389e] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
New NIR-emitting aza-BODIPY indicators which cover the pH scale from 1.5 to 13 are presented and combination of four of these pH indicators yields a pH sensor with an extended dynamic range from pH 2 to 9.
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Affiliation(s)
- Martin Strobl
- Institute of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
| | - Tanja Rappitsch
- Institute of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
| | - Sergey M. Borisov
- Institute of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
| | - Torsten Mayr
- Institute of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
| | - Ingo Klimant
- Institute of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
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38
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Ma X, Cheng J, Liu J, Zhou X, Xiang H. Ratiometric fluorescent pH probes based on aggregation-induced emission-active salicylaldehyde azines. NEW J CHEM 2015. [DOI: 10.1039/c4nj01908c] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AIE-active salicylaldehyde azines (SAs) display strong blue, green, and red fluorescence with large Stokes shifts in MeCN–water and solid medium and can be used as ratiometric fluorescent pH probes in water and test paper.
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Affiliation(s)
- Xiaofeng Ma
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | | | - Jiaoyan Liu
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Xiangge Zhou
- College of Chemistry
- Sichuan University
- Chengdu
- China
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39
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Barman S, Mukhopadhyay SK, Gangopadhyay M, Biswas S, Dey S, Singh NDP. Coumarin–benzothiazole–chlorambucil (Cou–Benz–Cbl) conjugate: an ESIPT based pH sensitive photoresponsive drug delivery system. J Mater Chem B 2015; 3:3490-3497. [DOI: 10.1039/c4tb02081b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed an ESIPT based drug delivery system, Cou–Benz–Cbl conjugate, with pH sensitive fluorescence properties and photocontrolled release of the anticancer drug chlorambucil.
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Affiliation(s)
- Shrabani Barman
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | | | | | - Sandipan Biswas
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Satyahari Dey
- Department of Biotechnology
- Indian Institute of Technology
- Kharagpur 721302
- India
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40
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Barooah N, Sundararajan M, Mohanty J, Bhasikuttan AC. Synergistic Effect of Intramolecular Charge Transfer toward Supramolecular pKa Shift in Cucurbit[7]uril Encapsulated Coumarin Dyes. J Phys Chem B 2014; 118:7136-46. [DOI: 10.1021/jp501824p] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nilotpal Barooah
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Mahesh Sundararajan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Jyotirmayee Mohanty
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Achikanath C. Bhasikuttan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
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41
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Affiliation(s)
- Dorota Wencel
- Optical Sensors Laboratory, School of Physical Sciences, Biomedical Diagnostics Institute, Dublin City University , Dublin, 9 Ireland
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42
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Patil VS, Padalkar VS, Tathe AB, Gupta VD, Sekar N. Synthesis, photo-physical and DFT studies of ESIPT inspired novel 2-(2',4'-dihydroxyphenyl) benzimidazole, benzoxazole and benzothiazole. J Fluoresc 2013; 23:1019-29. [PMID: 23681947 DOI: 10.1007/s10895-013-1228-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/30/2013] [Indexed: 11/25/2022]
Abstract
Novel ESIPT inspired benzimidazole, benzoxazole and benzothiazole were synthesized from 2,4-dihydroxy benzoic acid and 1,2-phenelenediamine, 2-aminophenol, and 2-aminothiophenol respectively. The synthesized 2-(2',4'-dihydroxyphenyl) benzimidazole, benzoxazole and benzothiazole are fluorescent and the emission characteristic are very sensitive to the micro-environment. They show a single absorption and dual emission with large Stokes shift originating from excited state intramolecular proton transfer. The absorption-emission characteristics of all these compounds are studied as a function of pH. The change in the electronic transition, energy levels, and orbital diagrams of synthesized compounds were investigated by the molecular orbital calculation and were correlated with the experimental spectral emission. Experimental absorption and emission wavelengths are in good agreement with those predicted using the Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT) [B3LYP/6-31G(d)].
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Affiliation(s)
- Vikas S Patil
- Tinctorial Chemistry Group, Institute of Chemical Technology (Formerly UDCT), Matunga, Mumbai, Maharashtra, India.
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43
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Döring A, Birnbaum W, Kuckling D. Responsive hydrogels--structurally and dimensionally optimized smart frameworks for applications in catalysis, micro-system technology and material science. Chem Soc Rev 2013; 42:7391-420. [PMID: 23677178 DOI: 10.1039/c3cs60031a] [Citation(s) in RCA: 255] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Although the technological and scientific importance of functional polymers has been well established over the last few decades, the most recent focus that has attracted much attention has been on stimuli-responsive polymers. This group of materials is of particular interest due to its ability to respond to internal and/or external chemico-physical stimuli, which is often manifested as large macroscopic responses. Aside from scientific challenges of designing stimuli-responsive polymers, the main technological interest lies in their numerous applications ranging from catalysis through microsystem technology and chemomechanical actuators to sensors that have been extensively explored. Since the phase transition phenomenon of hydrogels is theoretically well understood advanced materials based on the predictions can be prepared. Since the volume phase transition of hydrogels is a diffusion-limited process the size of the synthesized hydrogels is an important factor. Consistent downscaling of the gel size will result in fast smart gels with sufficient response times. In order to apply smart gels in microsystems and sensors, new preparation techniques for hydrogels have to be developed. For the up-coming nanotechnology, nano-sized gels as actuating materials would be of great interest.
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Affiliation(s)
- Artjom Döring
- Chemistry Department, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany
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44
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Cheng J, Zhang Y, Ma X, Zhou X, Xiang H. Colorimetric and fluorescent pH and Cu2+ probes induced by photoisomerization of a maleonitrile-based Salen ligand. Chem Commun (Camb) 2013; 49:11791-3. [DOI: 10.1039/c3cc47137c] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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45
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Frath D, Poirel A, Ulrich G, De Nicola A, Ziessel R. Fluorescent boron(iii) iminocoumarins (Boricos). Chem Commun (Camb) 2013; 49:4908-10. [DOI: 10.1039/c3cc41555d] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Cinar R, Nordmann J, Dirksen E, Müller TJJ. Domino synthesis of protochromic “ON–OFF–ON” luminescent 2-styryl quinolines. Org Biomol Chem 2013; 11:2597-604. [DOI: 10.1039/c3ob27270b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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47
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Disposable fluorescence optical pH sensor for near neutral solutions. SENSORS 2012; 13:484-99. [PMID: 23275084 PMCID: PMC3574686 DOI: 10.3390/s130100484] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/17/2012] [Accepted: 12/17/2012] [Indexed: 11/25/2022]
Abstract
The design, development and performance evaluation of a fluorescence-based pH sensor for on-line measurements is presented. The pKa of the sensing element has been calculated to be 7.9, thus the sensor is suitable for measurement of near neutral solutions. The sensor consists of a low-cost disposable polymer sensing probe, in contact with the solution under test, interrogated by an optoelectronic transduction system. The pH sensitive dye is based on fluorescein O-methacrylate, which has been covalently linked to a hydrogel matrix, realized through the use of HEMA (2-hydroxyethyl methacrylate), HDDA (1,6-hexanediol diacrylate) and PEGDA (polyethylene glycol diacrylate). The optical interrogation setup, together with the electronics, has been developed to acquire and process the fluorescence signal. The sensor works over a pH range between 6.5 and 9.0. In the range between 7.0 and 8.0, the sensor shows a linear behavior with a maximum linearity error of 5%. Thanks to the good performance of the sensing element and transduction system, the short term drift of the reading (measured over 40 min) is lower than 0.15%. The measuring system also exhibits good performance in terms of response time and reproducibility.
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48
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Li H, Guo J, Zhang X, Chen Z. A Novel Colorimetric and Fluorescent pH Sensor Derived from Iminocoumarin and Thiophene-Carboxaldehyde. HETEROATOM CHEMISTRY 2012. [DOI: 10.1002/hc.21049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hongqi Li
- Key Laboratory of Science & Technology of Eco-Textile; Ministry of Education; College of Chemistry; Chemical Engineering and Biotechnology; Donghua University; Shanghai; 201620; People's Republic of China
| | - Jian Guo
- Key Laboratory of Science & Technology of Eco-Textile; Ministry of Education; College of Chemistry; Chemical Engineering and Biotechnology; Donghua University; Shanghai; 201620; People's Republic of China
| | - Xuebin Zhang
- Key Laboratory of Science & Technology of Eco-Textile; Ministry of Education; College of Chemistry; Chemical Engineering and Biotechnology; Donghua University; Shanghai; 201620; People's Republic of China
| | - Zhen Chen
- Key Laboratory of Science & Technology of Eco-Textile; Ministry of Education; College of Chemistry; Chemical Engineering and Biotechnology; Donghua University; Shanghai; 201620; People's Republic of China
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49
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Patil VS, Padalkar VS, Phatangare KR, Gupta VD, Umape PG, Sekar N. Synthesis of New ESIPT-Fluorescein: Photophysics of pH Sensitivity and Fluorescence. J Phys Chem A 2011; 116:536-45. [DOI: 10.1021/jp2073123] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vikas S. Patil
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Vikas S. Padalkar
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Kiran R. Phatangare
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Vinod D. Gupta
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Prashant G. Umape
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Nagaiyan Sekar
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
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50
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Martínez-Otero A, Busqué F, Hernando J, Ruiz-Molina D. Structuration of pH-responsive fluorescent molecules on surfaces by soft lithographic techniques. NANOSCALE 2010; 2:1781-1788. [PMID: 20820710 DOI: 10.1039/c0nr00169d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Two different soft lithographic techniques (LCW and microCP) have been successfully used for the structuration of fluorescent pH-responsive molecules on surface. The molecules of choice, fluorescein (1) and a new catechol derivative (2), exhibit several protonation states with distinct emission properties over a large acid-base range. This allowed us to fabricate fluorescent arrays that respond over a large pH-window.
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Affiliation(s)
- Alberto Martínez-Otero
- Centro de Investigación en Nanociencia y Nanotecnología (CIN2, CSIC-ICN), Esfera UAB, Cerdanyola del Vallès, Spain
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