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Redondo-Gómez C, Parreira P, Martins MCL, Azevedo HS. Peptide-based self-assembled monolayers (SAMs): what peptides can do for SAMs and vice versa. Chem Soc Rev 2024; 53:3714-3773. [PMID: 38456490 DOI: 10.1039/d3cs00921a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Self-assembled monolayers (SAMs) represent highly ordered molecular materials with versatile biochemical features and multidisciplinary applications. Research on SAMs has made much progress since the early begginings of Au substrates and alkanethiols, and numerous examples of peptide-displaying SAMs can be found in the literature. Peptides, presenting increasing structural complexity, stimuli-responsiveness, and biological relevance, represent versatile functional components in SAMs-based platforms. This review examines the major findings and progress made on the use of peptide building blocks displayed as part of SAMs with specific functions, such as selective cell adhesion, migration and differentiation, biomolecular binding, advanced biosensing, molecular electronics, antimicrobial, osteointegrative and antifouling surfaces, among others. Peptide selection and design, functionalisation strategies, as well as structural and functional characteristics from selected examples are discussed. Additionally, advanced fabrication methods for dynamic peptide spatiotemporal presentation are presented, as well as a number of characterisation techniques. All together, these features and approaches enable the preparation and use of increasingly complex peptide-based SAMs to mimic and study biological processes, and provide convergent platforms for high throughput screening discovery and validation of promising therapeutics and technologies.
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Affiliation(s)
- Carlos Redondo-Gómez
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Paula Parreira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - M Cristina L Martins
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 4050-313 Porto, Portugal
| | - Helena S Azevedo
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal.
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
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2
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Liu L, Zhang X, Fedeli S, Cicek YA, Ndugire W, Rotello VM. Controlled Bio-Orthogonal Catalysis Using Nanozyme-Protein Complexes via Modulation of Electrostatic Interactions. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1507. [PMID: 38612022 PMCID: PMC11012815 DOI: 10.3390/ma17071507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024]
Abstract
Bio-orthogonal chemistry provides a powerful tool for drug delivery systems due to its ability to generate therapeutic agents in situ, minimizing off-target effects. Bio-orthogonal transition metal catalysts (TMCs) with stimuli-responsive properties offer possibilities for controllable catalysis due to their spatial-, temporal-, and dosage-controllable properties. In this paper, we fabricated a stimuli-responsive bio-orthogonal catalysis system based on an enhanced green fluorescent protein (EGFP)-nanozyme (NZ) complex (EGFP-NZ). Regulation of the catalytic properties of the EGFP-NZ complex was directly achieved by modulating the ionic strength of the solution. The dielectric screening introduced by salt ions allows the dissociation of the EGFP-NZ complex, increasing the access of substrate to the active site of the NZs and concomitantly increasing nanozyme activity. The change in catalytic rate of the NZ/EGFP = 1:1 complex was positively correlated with salt concentration from 0 mM to 150 mM.
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Affiliation(s)
| | | | | | | | | | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 N. Pleasant St., Amherst, MA 01003, USA; (L.L.); (X.Z.); (S.F.); (Y.A.C.)
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3
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The role of polymeric chains as a protective environment for improving the stability and efficiency of fluorogenic peptide substrates. Sci Rep 2022; 12:8818. [PMID: 35614307 PMCID: PMC9132916 DOI: 10.1038/s41598-022-12848-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022] Open
Abstract
We have faced the preparation of fully water-soluble fluorescent peptide substrate with long-term environmental stability (in solution more than 35 weeks) and, accordingly, with stable results in the use of this probe in determining the activity of enzymes. We have achieved this goal by preparing a co-polymer of the commercial N-vinyl-2-pyrrolidone (99.5% mol) and a fluorescent substrate for trypsin activity determination having a vinylic group (0.5%). The activity of trypsin has been measured in water solutions of this polymer over time, contrasted against the activity of both the commercial substrate Z-L-Arg-7-amido-4-methylcoumarin hydrochloride and its monomeric derivative, prepared ad-hoc. Initially, the activity of the sensory polymer was 74.53 ± 1.72 nmol/min/mg of enzyme, while that of the commercial substrate was 20.44 ± 0.65 nmol/min/mg of enzyme, the former maintained stable along weeks and the latter with a deep decay to zero in three weeks. The ‘protection’ effect exerted by the polymer chain has been studied by solvation studies by UV–Vis spectroscopy, steady-state & time resolved fluorescence, thermogravimetry and isothermal titration calorimetry.
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4
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Chang KH, Chao WC, Yang YH, Wu CH, Li ZB, Chen HC, Chou YT, Annie Ho JA, Li XC, Peng YC, Liao YC, Liu KM, Chao CM, Chou PT. Cyano Derivatives of 7-Aminoquinoline That Are Highly Emissive in Water: Potential for Sensing Applications. Chemistry 2021; 27:8040-8047. [PMID: 33904607 DOI: 10.1002/chem.202100413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Indexed: 12/20/2022]
Abstract
6-Cyano-7-aminoquinoline (6CN-7AQ) and 3-cyano-7-aminoquinoline (3CN-7AQ) were synthesized and found to exhibit intense emission with quantum yield as high as 63 % and 85 %, respectively, in water. Conversely, their derivatives 6-cyano-7-azidoquinoline (6CN-7N3 Q) and 3-cyano-7-azidoquinoline (3CN-7N3 Q) show virtually no emission, which makes them suitable to be used as recognition agents in azide reactions based on fluorescence recovery. Moreover, conjugation of 6CN-7AQ with a hydrophobic biomembrane-penetration peptide PFVYLI renders a nearly non-emissive 6CN-7AQ-PFVYLI composite, which can be digested by proteinase K, recovering the highly emissive 6CN-7AQ with ∼200-fold enhancement. The result provides an effective early confirmation for RT-qPCR in viral detection.
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Affiliation(s)
- Kai-Hsin Chang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Wei-Chih Chao
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Yu-Hsuan Yang
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Cheng-Ham Wu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Zhi-Bin Li
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Hung-Che Chen
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yi-Te Chou
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Center for Emerging Materials and Advanced Devices, National Taiwan University, Taipei, 10617, Taiwan, R.O.C.,Center for Biotechnology, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Xin-Cheng Li
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yu-Chiang Peng
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Yu-Chan Liao
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
| | - Kuan-Miao Liu
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Chi-Min Chao
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung, 40201, Taiwan, R.O.C.,Department of Medical Education, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan, R.O.C
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, R.O.C
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5
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Żamojć K, Bylińska I, Wiczk W, Chmurzyński L. Fluorescence Quenching Studies on the Interactions between Chosen Fluoroquinolones and Selected Stable TEMPO and PROXYL Nitroxides. Int J Mol Sci 2021; 22:ijms22020885. [PMID: 33477329 PMCID: PMC7830230 DOI: 10.3390/ijms22020885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/07/2021] [Accepted: 01/13/2021] [Indexed: 11/16/2022] Open
Abstract
The influence of the stable 2,2,6,6-tetramethylpiperidinyl-N-oxyl (TEMPO) nitroxide and its six C4-substituted derivatives, as well as two C3-substituted analogues of 2,2,5,5-tetramethylpyrrolidynyl-N-oxyl (PROXYL) nitroxide on the chosen fluoroquinolone antibiotics (marbofloxacin, ciprofloxacin, danofloxacin, norfloxacin, enrofloxacin, levofloxacin and ofloxacin), has been examined in aqueous solutions by UV absorption as well as steady-state and time-resolved fluorescence spectroscopies. The mechanism of fluorescence quenching has been specified and proved to be purely dynamic (collisional) for all the studied systems, which was additionally confirmed by temperature dependence experiments. Moreover, the selected quenching parameters—that is, Stern–Volmer quenching constants and bimolecular quenching rate constants—have been determined and explained. The possibility of electron transfer was ruled out, and the quenching was found to be diffusion-limited, being a result of the increase in non-radiative processes. Furthermore, as the chosen nitroxides affected the fluorescence of fluoroquinolone antibiotics in different ways, an influence of the structure and the type of substituents in the molecules of both fluoroquinolones and stable radicals on the quenching efficiency has been determined and discussed. Finally, the impact of the solvent’s polarity on the values of bimolecular quenching rate constants has been explained. The significance of the project comes from many applications of nitroxides in chemistry, biology and industry.
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6
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Kang R, Talamini L, D'Este E, Estevão BM, De Cola L, Klopper W, Biedermann F. Discovery of a size-record breaking green-emissive fluorophore: small, smaller, HINA. Chem Sci 2020; 12:1392-1397. [PMID: 34163902 PMCID: PMC8179180 DOI: 10.1039/d0sc05557c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Astonishingly, 3-hydroxyisonicotinealdehyde (HINA) is despite its small size a green-emitting push–pull fluorophore in water (QY of 15%) and shows ratiometric emission response to biological relevant pH differences (pKa2 ∼ 7.1). Moreover, HINA is the first small-molecule fluorophore reported that possesses three distinctly emissive protonation states. This fluorophore can be used in combination with metal complexes for fluorescent-based cysteine detection in aqueous media, and is readily taken up by cells. The theoretical description of HINA's photophysics remains challenging, even when computing Franck–Condon profiles via coupled-cluster calculations, making HINA an interesting model for future method development. Astonishingly, 3-hydroxyisonicotinealdehyde (HINA) is despite its small size a green-emitting push–pull fluorophore in water (QY of 15%) and shows ratiometric emission response to biological relevant pH differences (pKa2 ∼ 7.1).![]()
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Affiliation(s)
- Rui Kang
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Laura Talamini
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg, CNRS 8Rue Gaspard Monge 67083 Strasbourg France
| | - Elisa D'Este
- Optical Microscopy Facility, Max Plank Institute for Medical Research Jahnstraße 29 D-69120 Heidelberg Germany
| | - Bianca Martins Estevão
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg, CNRS 8Rue Gaspard Monge 67083 Strasbourg France
| | - Luisa De Cola
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany .,Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg, CNRS 8Rue Gaspard Monge 67083 Strasbourg France
| | - Wim Klopper
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany .,Institute of Physical Chemistry (IPC), Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Frank Biedermann
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
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7
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Hu Q, Yue YH, Chai LQ, Tang LJ. Synthesis, characterization, spectral property, Hirshfeld surface analysis and TD/DFT calculations of 2, 6-disubstituted benzobisoxazoles. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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8
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Dihydroxy-Substituted Coumarins as Fluorescent Probes for Nanomolar-Level Detection of the 4-Amino-TEMPO Spin Label. Int J Mol Sci 2019; 20:ijms20153802. [PMID: 31382639 PMCID: PMC6696051 DOI: 10.3390/ijms20153802] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 12/18/2022] Open
Abstract
This paper reports on dihydroxycoumarins as fluorescent probes suitable for the detection and determination of the nitroxide radical, namely 4-amino-TEMPO. Since 4-amino-TEMPO is used as a spin label for the detection of various radicals and damage caused by these species, its determination under physiological conditions might help us to understand the mechanism of the oxidative stress. Among different coumarins studied, only dihydroxy-substituted derivatives show high sensitivity, specificity, and selectivity for the nitroxide radical. In this assay, dihydroxy-substituted coumarins under the action of 4-amino-TEMPO show a very fast and significant increase in fluorescence intensity and lifetime. Among them 6,7-dihydroxycoumarin (esculetin) exhibits the strongest fluorescence enhancement (up to 40 times), with an estimated limit of detection equal to 16.7 nM—a significantly lower value when compared with UV-Vis or electron paramagnetic resonance (EPR) spectroscopy. The method is characterized by an easy procedure of sample preparation and very short time of analysis. The mechanism of the interaction between 6,7-dihydroxycoumarin and 4-amino-TEMPO has been examined with the use of a series of complementary techniques, such as steady-state and time-resolved fluorescence spectroscopy, UV-Vis spectroscopy, electron paramagnetic resonance spectroscopy, potentiometric titration, and high-performance liquid chromatography. It has been proven that the only route of the reaction in the system studied is a proton transfer from the molecule of esculetin to the amino group of the nitroxide. Biological studies performed on prostate cancer cells, breast cancer cells, and normal skin fibroblasts revealed significant anticancer properties of 6,7-dihydroxycoumarin, which caused a considerable decrease in the viability and number of cancer cells, and affected their morphology, contrary to normal fibroblasts. Furthermore, the experiment performed on prostate cancer cells showed that fluorescence emission of esculetin is closely related to intracellular pH—the higher pH, the higher observed fluorescence intensity (in accordance with a chemical experiment). On the other hand, the studies performed in different pH levels revealed that when pH of the solution increases, the observed fluorescence intensity enhancement under the action of 4-amino-TEMPO decreases (better sensing properties of esculetin towards the nitroxide in lower pH).
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9
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Molina-Bolívar JA, Galisteo-González F, Ruiz CC, Medina-O'Donnell M, Martínez A, Parra A. Maslinic acid conjugate with 7-amino-4-methylcoumarin as probe to monitor the temperature dependent conformational changes of human serum albumin by FRET. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:161-169. [PMID: 30776717 DOI: 10.1016/j.saa.2019.02.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 01/14/2019] [Accepted: 02/09/2019] [Indexed: 05/25/2023]
Abstract
Synthesis, characterization and spectroscopic investigation of maslinic acid labeled with fluorescent 7-amino-4-methylcoumarin is reported. It was found that the coumarin-maslinic derivative (MaCo) forms an excellent fluorescence resonance energy transfer (FRET) pair with the tryptophan (Trp) residue of human serum albumin (HSA). This feature allowed for monitoring HSA conformational alterations by measuring the distance between donor (Trp) and acceptor (MaCo) through Förster energy transfer mechanism. Displacement experiments confirmed that MaCo binds to subdomain IIA of HSA with independence of temperature. It was observed that, in the temperature range 35-45 °C, the fluorescence emission maximum of HSA-MaCo complex decreased, whereas in the range 45 °C-65 °C, an increment was detected. The concomitant change in the polarity of environment surrounding Trp was confirmed by red edge excitation shift experiments. Thermal denaturation of HSA was followed by time-resolved fluorescence spectroscopy. Average lifetime of Trp residue decreased with temperature due to the increment of solvent collisions and changes in the solvent exposure of Trp. To discriminate the importance of each effect, lifetime of N-Acetyl-L-tryptophanamide (NATA) at different temperatures was measured. Circular dichroism (CD) studies confirmed the loss of secondary structure of HSA with increasing temperature and showed a different trend in the conformational transformation below and above 45 °C, in agreement with steady-state and time-resolved fluorescence experiments.
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Affiliation(s)
- J A Molina-Bolívar
- Department of Applied Physics II, Engineering School, University of Málaga, 29071 Málaga, Spain.
| | | | - C Carnero Ruiz
- Department of Applied Physics II, Engineering School, University of Málaga, 29071 Málaga, Spain
| | - M Medina-O'Donnell
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
| | - A Martínez
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
| | - A Parra
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
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10
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Wilcox DA, Snaider J, Mukherjee S, Yuan L, Huang L, Savoie BM, Boudouris BW. Tuning the interfacial and energetic interactions between a photoexcited conjugated polymer and open-shell small molecules. SOFT MATTER 2019; 15:1413-1422. [PMID: 30657519 DOI: 10.1039/c8sm01930d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Design rules and application spaces for closed-shell conjugated polymers have been well established in the field of organic electronics, but the emerging class of open-shell stable radicals has not been evaluated in such detail. Thus, establishing the underlying physical phenomena associated with the interactions between both classes of molecules is imperative for the effective utilization of these soft materials. Here, we establish that Förster Resonance Energy Transfer (FRET) is the dominant mechanism by which energy transfer occurs from a common conjugated polymer to various radical species using a combination of experimental and computational approaches. Specifically, we determined this fact by monitoring the fluorescence quenching of poly(3-hexylthiophene) (P3HT) in the presence of three radical species: (1) the galvinoxyl; (2) the 2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl (PTIO); and (3) the 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radicals. Both in solution and in the solid-state, the galvinoxyl and PTIO radicals showed quenching that was on par with that of a common fullerene electron-accepting derivative, due to the considerable overlap of their absorbance spectrum with the fluorescence spectrum of the P3HT species, which indicated that isoenergetic electronic transitions existed for both species. Conversely, TEMPO showed minimal quenching at similar concentrations due to the lack of such an overlap. Furthermore, computational studies demonstrated that FRET would occur at a significantly faster rate than other competing processes. These findings suggest that long-range energy transfer can be accomplished in applications when radicals that can act as FRET acceptors are utilized, forming a new design paradigm for future applications involving both closed- and open-shell soft materials.
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Affiliation(s)
- Daniel A Wilcox
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 W Stadium Ave, West Lafayette, Indiana 47907, USA.
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11
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Żamojć K, Wiczk W, Chmurzyński L. The influence of the type of substituents and the solvent on the interactions between different coumarins and selected TEMPO analogues – Fluorescence quenching studies. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Wei Y, Mei L, Li R, Liu M, Lv G, Weng J, Liao L, Li Z, Lu L. Fabrication of an AMC/MMT Fluorescence Composite for its Detection of Cr(VI) in Water. Front Chem 2018; 6:367. [PMID: 30186831 PMCID: PMC6110932 DOI: 10.3389/fchem.2018.00367] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 07/30/2018] [Indexed: 11/13/2022] Open
Abstract
Hexavalent chromium species, Cr(VI), which can activate teratogenic processes, disturb DNA synthesis and induce mutagenic changes resulting in malignant tumors. The detection and quantification of Cr(VI) is very necessary. One of the rapid and simple methods for contaminant analysis is fluorescence detection using organic dye molecules. Its application is limited owing to concentration quenching due to aggregation of fluorescent molecules. In this study, we successfully intercalated 7-amino-4-methylcoumarin (AMC) into the interlayer space of montmorillonite (MMT), significantly inhibited fluorescence quenching. Due to enhanced fluorescence property, the composite was fabricated into a film with chitosan to detect Cr(VI) in water. Cr(VI) can be detected in aqueous solution by instruments excellent, ranging from 0.005 to 100 mM with a detection limit of 5 μM.
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Affiliation(s)
- Yanke Wei
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Lefu Mei
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Rui Li
- State Grid Corporation of China, Beijing, China
| | - Meng Liu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Guocheng Lv
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Jianle Weng
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Libing Liao
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Zhaohui Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
- Geosciences Department, University of Wisconsin—Parkside, Kenosha, WI, United States
| | - Lin Lu
- State Grid Corporation of China, Beijing, China
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13
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Makowska J, Żamojć K, Wyrzykowski D, Wiczk W, Chmurzyński L. Copper(II) complexation by fragment of central part of FBP28 protein from Mus musculus. Biophys Chem 2018; 241:55-60. [PMID: 30107307 DOI: 10.1016/j.bpc.2018.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/04/2018] [Accepted: 08/05/2018] [Indexed: 01/18/2023]
Abstract
Steady-state and time-resolved fluorescence spectroscopy, UV spectrophotometry and isothermal titration calorimetry techniques were used to study the coordinating properties of the 17aa peptide fragment (D17) derived from the central part of the mouse formin binding protein (FBP28 with the PDB code: 1E0L) towards Cu2+ ions. All the measurements were run in the 2-(N-morpholino)ethanesulfonic acid buffer (20 mM, pH 6.0). Under experimental conditions the formation of the 1:1 complex of Cu2+ ions with D17 is an entropy-driven process. Cu2+ ions cause the static fluorescence quenching of the peptide studied through the formation of a non-fluorescent complex. Furthermore, the thermal stability of D17 was discussed based on the results obtained from differential scanning fluorimetry (nanoDSF) data.
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Affiliation(s)
- Joanna Makowska
- Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Krzysztof Żamojć
- Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland.
| | - Dariusz Wyrzykowski
- Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Wiesław Wiczk
- Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Lech Chmurzyński
- Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland
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14
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Zhang C, Guo JF, Ren AM, Wang D. A theoretical investigation of the two-photon absorption and fluorescent properties of coumarin-based derivatives for Pd2+ detection. RSC Adv 2017. [DOI: 10.1039/c7ra08832a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Two-photon fluorescent probes that can detect Pd2+ according to the “turn-on” fluorescence signal are reported.
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Affiliation(s)
- Chun Zhang
- Institute of Theoretical Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Jilin University
- Changchun
- China
| | - Jing-Fu Guo
- School of Physics
- Northeast Normal University
- Changchun
- China
| | - Ai-Min Ren
- Institute of Theoretical Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Jilin University
- Changchun
- China
| | - Dan Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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15
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Klimeš P, Turek D, Mazura P, Gallová L, Spíchal L, Brzobohatý B. High Throughput Screening Method for Identifying Potential Agonists and Antagonists of Arabidopsis thaliana Cytokinin Receptor CRE1/AHK4. FRONTIERS IN PLANT SCIENCE 2017. [PMID: 28642766 PMCID: PMC5463364 DOI: 10.3389/fpls.2017.00947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The CRE1/AHK4 cytokinin receptor is an important component of plants' hormone signaling systems, and compounds that can alter its activity have potential utility for studying the receptor's functions and/or developing new plant growth regulators. A high throughput method was developed for screening compounds with agonist or antagonist properties toward the CRE1/AHK4 cytokinin receptor in a single experiment using the Nanodrop II liquid handling system and 384-well plates. Potential ligands are screened directly, using a reporter system in which receptor signaling activity triggers expression of β-galactosidase in Escherichia coli. This enzyme generates a fluorescent product from a non-fluorescent substrate, allowing the agonistic/antagonistic behavior of tested compounds to be assayed in relation to that of an internal standard (here the natural ligand, trans-zeatin). The method includes a robust control procedure to determine false positive or false negative effects of the tested compounds arising from their fluorescent or fluorescent-quenching properties. The presented method enables robust, automated screening of large libraries of compounds for ability to activate or inhibit the Arabidopsis thaliana cytokinin receptor CRE1/AHK4.
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Affiliation(s)
- Pavel Klimeš
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS CR v.v.i. and Central European Institute of Technology, Mendel University in BrnoBrno, Czechia
| | - Dušan Turek
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS CR v.v.i. and Central European Institute of Technology, Mendel University in BrnoBrno, Czechia
| | - Pavel Mazura
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS CR v.v.i. and Central European Institute of Technology, Mendel University in BrnoBrno, Czechia
- *Correspondence: Pavel Mazura,
| | - Lucia Gallová
- Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, OlomoucOlomouc, Czechia
| | - Lukáš Spíchal
- Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, OlomoucOlomouc, Czechia
| | - Břetislav Brzobohatý
- Laboratory of Plant Molecular Biology, Institute of Biophysics AS CR v.v.i. and Central European Institute of Technology, Mendel University in BrnoBrno, Czechia
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16
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Makowska J, Żamojć K, Wyrzykowski D, Żmudzińska W, Uber D, Wierzbicka M, Wiczk W, Chmurzyński L. Probing the binding of Cu(2+) ions to a fragment of the Aβ(1-42) polypeptide using fluorescence spectroscopy, isothermal titration calorimetry and molecular dynamics simulations. Biophys Chem 2016; 216:44-50. [PMID: 27398680 DOI: 10.1016/j.bpc.2016.06.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 06/22/2016] [Accepted: 06/30/2016] [Indexed: 12/19/2022]
Abstract
Steady-state and time-resolved fluorescence quenching measurements supported by isothermal titration calorimetry (ITC) and molecular dynamics simulations (MD), with the NMR-derived restraints, were used to investigate the interactions of Cu(2+) ions with a fragment of the Aβ(1-42) polypeptide, Aβ(5-16) with the following sequence: Ac-Arg-His-Asp-Ser-Gly-Tyr-Glu-Val-His-His-Gln-Lys-NH2, denoted as HZ1. The studies presented in this paper, when compared with our previous results (Makowska et al., Spectrochim. Acta A 153: 451-456), show that the affinity of the peptide to metal ions is conformation-dependent. All the measurements were carried out in 20mM 2-(N-morpholino)ethanesulfonic acid (MES) buffer solution, pH6.0. The Stern-Volmer equations, along with spectroscopic observations, were used to determine the quenching and binding parameters. The obtained results unequivocally suggest that Cu(2+) ions quench the fluorescence of HZ1 only through a static quenching mechanism, in contrast to the fragment from the N-terminal part of the FPB28 protein, with sequence Ac-Tyr-Lys-Thr-Ala-Asp-Gly-Lys-Thr-Tyr- NH2 (D9) and its derivative with a single point mutation: Ac-Tyr-Lys-Thr-Ala-Asn-Gly-Lys-Thr-Tyr- NH2 (D9_M), where dynamic quenching occurred. The thermodynamic parameters (ΔITCH, ΔITCS) for the interactions between Cu(2+) ions and the HZ1 peptide were determined from the calorimetric data. The conditional thermodynamic parameters suggest that, under the experimental conditions, the formation of the Cu(2+)-HZ1 complex is both an enthalpy and entropy driven process.
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Affiliation(s)
- Joanna Makowska
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Krzysztof Żamojć
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Dariusz Wyrzykowski
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Wioletta Żmudzińska
- Intercollegiate Faculty of Biotechnology UG&MUG, University of Gdańsk, ul. Abrahama 58, 80-307 Gdańsk, Poland
| | - Dorota Uber
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Małgorzata Wierzbicka
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Wiesław Wiczk
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Lech Chmurzyński
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
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17
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Dalzini A, Bergamini C, Biondi B, De Zotti M, Panighel G, Fato R, Peggion C, Bortolus M, Maniero AL. The rational search for selective anticancer derivatives of the peptide Trichogin GA IV: a multi-technique biophysical approach. Sci Rep 2016; 6:24000. [PMID: 27039838 PMCID: PMC4819177 DOI: 10.1038/srep24000] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/18/2016] [Indexed: 02/07/2023] Open
Abstract
Peptaibols are peculiar peptides produced by fungi as weapons against other microorganisms. Previous studies showed that peptaibols are promising peptide-based drugs because they act against cell membranes rather than a specific target, thus lowering the possibility of the onset of multi-drug resistance, and they possess non-coded α-amino acid residues that confer proteolytic resistance. Trichogin GA IV (TG) is a short peptaibol displaying antimicrobial and cytotoxic activity. In the present work, we studied thirteen TG analogues, adopting a multidisciplinary approach. We showed that the cytotoxicity is tuneable by single amino-acids substitutions. Many analogues maintain the same level of non-selective cytotoxicity of TG and three analogues are completely non-toxic. Two promising lead compounds, characterized by the introduction of a positively charged unnatural amino-acid in the hydrophobic face of the helix, selectively kill T67 cancer cells without affecting healthy cells. To explain the determinants of the cytotoxicity, we investigated the structural parameters of the peptides, their cell-binding properties, cell localization, and dynamics in the membrane, as well as the cell membrane composition. We show that, while cytotoxicity is governed by the fine balance between the amphipathicity and hydrophobicity, the selectivity depends also on the expression of negatively charged phospholipids on the cell surface.
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Affiliation(s)
- Annalisa Dalzini
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Christian Bergamini
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, via Irnerio 48, 40126, Bologna, Italy
| | - Barbara Biondi
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Marta De Zotti
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Giacomo Panighel
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Romana Fato
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, via Irnerio 48, 40126, Bologna, Italy
| | - Cristina Peggion
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
| | - Marco Bortolus
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy.,Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, 20126, Milano, Italy
| | - Anna Lisa Maniero
- Dipartimento di Chimica, Università di Padova, via Marzolo 1, 35131, Padova, Italy
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18
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Makowska J, Żamojć K, Wyrzykowski D, Uber D, Wierzbicka M, Wiczk W, Chmurzyński L. Binding of Cu(II) ions to peptides studied by fluorescence spectroscopy and isothermal titration calorimetry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 153:451-6. [PMID: 26363471 DOI: 10.1016/j.saa.2015.08.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 05/12/2023]
Abstract
Steady-state and time-resolved fluorescence quenching measurements supported by Isothermal Titration Calorimetry (ITC) were used to study the interactions of Cu(2+) with four peptides. Two of them were taken from the N-terminal part of the FBP28 protein (formin binding protein) WW domain: Tyr-Lys-Thr-Ala-Asp-Gly-Lys-Thr-Tyr-NH2 (D9) and its mutant Tyr-Lys-Thr-Ala-Asn-Gly-Lys-Thr-Tyr-NH2 (D9_M) as well as two mutated peptides from the B3 domain of the immunoglobulin binding protein G derived from Streptococcus: Asp-Val-Ala-Thr-Tyr-Thr-NH2 (J1) and Glu-Val-Ala-Thr-Tyr-Thr-NH2 (J2). The measurements were carried out at 298.15K in 20mM 2-(N-morpholino)ethanesulfonic acid (MES) buffer solution with a pH of 6. The fluorescence of all peptides was quenched by Cu(2+) ions. The stoichiometry, conditional stability constants and thermodynamic parameters for the interactions of the Cu(2+) ions with D9 and D9_M were determined from the calorimetric data. The values of the conditional stability constants were additionally determined from fluorescence quenching measurements and compared with those obtained from calorimetric studies. There was a good correlation between data obtained from the two techniques. On the other hand, the studies revealed that J1 and J2 do not exhibit an affinity towards metal ions. The obtained results prove that fluorescence quenching experiments may be successfully used in order to determine stability constants of complexes with fluorescent ligands. Finally, based on the obtained results, the coordinating properties of the peptides towards the Cu(2+) ions are discussed.
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Affiliation(s)
- Joanna Makowska
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Krzysztof Żamojć
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Dariusz Wyrzykowski
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Dorota Uber
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Małgorzata Wierzbicka
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Wiesław Wiczk
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Lech Chmurzyński
- Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
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19
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Żamojć K, Zdrowowicz M, Wiczk W, Jacewicz D, Chmurzyński L. Dihydroxycoumarins as highly selective fluorescent probes for the fast detection of 4-hydroxy-TEMPO in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra07283b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dihydroxycoumarins are found to be highly selective fluorescent probes for the fast detection of 4-hydroxy-TEMPO in aqueous solution.
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Affiliation(s)
- K. Żamojć
- University of Gdansk
- Faculty of Chemistry
- 80-308 Gdansk
- Poland
| | - M. Zdrowowicz
- University of Gdansk
- Faculty of Chemistry
- 80-308 Gdansk
- Poland
| | - W. Wiczk
- University of Gdansk
- Faculty of Chemistry
- 80-308 Gdansk
- Poland
| | - D. Jacewicz
- University of Gdansk
- Faculty of Chemistry
- 80-308 Gdansk
- Poland
| | - L. Chmurzyński
- University of Gdansk
- Faculty of Chemistry
- 80-308 Gdansk
- Poland
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