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Pivovarenko VG. Multi-parametric sensing by multi-channel molecular fluorescent probes based on excited state intramolecular proton transfer and charge transfer processes. BBA ADVANCES 2023; 3:100094. [PMID: 37347000 PMCID: PMC10279795 DOI: 10.1016/j.bbadva.2023.100094] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 05/26/2023] [Indexed: 06/23/2023] Open
Abstract
Considering the applications of fluorescent probes and the information they provide, their brightness of fluorescence and photostability are of paramount importance. However, in the case of steady-state fluorescence spectroscopy and fluorescence microscopy, the amount of information can be increased by the application of multi-channel probes, via a multi-band fluorophore introduced in the probe molecule. In most cases, the use of such a multi-band (or multi-channel) fluorophore can also be combined with the concomitant introduction of one or several analyte receptors. Most often, the design of ratiometric probes with multi-band fluorescence emission are based on phenomena such as photoinduced intramolecular charge transfer (ICT) or excited state intramolecular proton transfer (ESIPT). Although ICT probes were up to recently the most popular, ESIPT probes and among them 3-hydroxyflavone derivatives, were shown to be the most productive. Several general problems were resolved by this family of probes, as for example the measurement of local dielectric constant, local H-bond accepting ability, water local concentration and ATP concentration in small volumes. Incorporation of such multi-channel probes into lipid membranes allowed to measure the different membrane potentials and to detect cell apoptosis. Also, it enabled to recognize and characterize the rafts formation in different lipid bilayers and peculiar features of the charged membrane interface. Such probes are also able to provide a concentration-dependent fluorescence signals upon binding of H+, Mg2+and Ba2+ions, and thus to recognize these different cations. The multi-channel probes are effective tools in the study of interactions of macromolecules such as peptides, proteins and nucleic acids. The most useful feature is that they inform simultaneously about several physical parameters, in this way giving a better insight in the investigated system. Thus, by comparing the reviewed probes with other modern fluorescent approaches, it can be concluded they are more informative and accurate tools.
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Fan KW, Luk HL, Phillips DL. Anti-Kasha Behavior of 3-Hydroxyflavone and Its Derivatives. Int J Mol Sci 2021; 22:ijms222011103. [PMID: 34681762 PMCID: PMC8540728 DOI: 10.3390/ijms222011103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022] Open
Abstract
Excited state intramolecular proton transfer (ESIPT) in 3-hydroxyflavone (3HF) has been known for its dependence on excitation wavelength. Such a behavior violates Kasha’s rule, which states that the emission and photochemistry of a compound would only take place from its lowest excited state. The photochemistry of 3HF was studied using femtosecond transient absorption spectroscopy at a shorter wavelength excitation (266 nm), and these new experimental findings were interpreted with the aid of computational studies. These new results were compared with those from previous studies that were obtained with a longer wavelength excitation and show that there exists a pathway of proton transfer that bypasses the normal first excited state from the higher excited state to the tautomer from first excited state. The experimental data correlate with the electron density difference calculations such that the proton transfer process is faster on the longer excitation wavelength than compared to the shorter excitation wavelength.
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Affiliation(s)
- Ka Wa Fan
- Department of Chemistry, University of Hong Kong, Hong Kong 999077, China;
| | - Hoi Ling Luk
- Department of Chemistry, University of Hong Kong, Hong Kong 999077, China;
- Correspondence: (H.L.L.); (D.L.P.)
| | - David Lee Phillips
- Department of Chemistry, University of Hong Kong, Hong Kong 999077, China;
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, Hong Kong 999077, China
- Correspondence: (H.L.L.); (D.L.P.)
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Qi Y, Tang Z, Zhan H, Wang Y, Zhao Y, Fei X, Tian J, Yu L, Liu J. A new interpretation of the ESIPT mechanism of 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117359. [PMID: 31344583 DOI: 10.1016/j.saa.2019.117359] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/20/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
The present study demonstrates the excited-state intramolecular proton transfer (ESIPT) mechanism of 2-(benzimidazol-2-yl)-3-hydroxychromone (DH3B2) is based on density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods. We find that DH3B2-C is the main conformation to occur ESIPT. Moreover, we get the different results of DH3B2 for the ESIPT mechanisms in comparison with the previous reports. We have optimized three isomers (DH3B2-A, DH3B2-B and DH3B2-C), and calculated absorption and fluorescence spectra, which agree well with the experimental data. Furthermore, we prove the hydrogen bond is enhanced in the S1 state by comparing infrared vibrational spectra, the relevant bond length and bond angle. In our calculations, the results of the three levels of calculations (CAM-B3LYP/TZVP, B3LYP/TZVP and PBEPBE/TZVP) indicate that DH3B2-C is the most stable conformation, by compared the single point energy of three isomers. By constructed the potential energy surfaces (PESs), we find the converted relationship among the three isomers; DH3B2-C is the main conformation in which DH3B2 exists. Furthermore, combination with reduced density gradient (RDG) function, the hydrogen bond of DH3B2-C is stronger than that of DH3B2-A and DH3B2-B, which proves that DH3B2-C form is the most favorable form for ESIPT among the three isomers. Meanwhile, we have further investigated the ESIPT mechanisms of DH3B2, via constructing the potential energy curves (PECs). These results have shown that DH3B2-C is easier to ESIPT occur than DH3B2-A and DH3B2-B. Therefore, the proton receptors of the ESIPT are mainly the benzimidazole nitrogen atoms.
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Affiliation(s)
- Yutai Qi
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Zhe Tang
- Institute of Molecular Sciences and Engineering, Shandong University, Qing dao 266237, PR China
| | - Hongbin Zhan
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Yi Wang
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Yanliang Zhao
- Institute of Molecular Sciences and Engineering, Shandong University, Qing dao 266237, PR China
| | - Xu Fei
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Jing Tian
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Ling Yu
- Lab Analyst of Network Information Center, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Jianyong Liu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, PR China.
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4’-Methoxy-3-hydroxyflavone excited state intramolecular proton transfer reaction in alcoholic solutions: Intermolecular versus intramolecular hydrogen bonding effect. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111964] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Mohapatra M, Mishra AK. Excited state proton transfer based fluorescent molecular probes and their application in studying lipid bilayer membranes. Photochem Photobiol Sci 2019; 18:2830-2848. [DOI: 10.1039/c9pp00294d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The distribution and prototropic equilibria of 1-naphthol (NpOH) in lipid bilayer membrane.
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Affiliation(s)
| | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
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6
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Ushakou DV, Tomin VI. Spectroscopic methods for the study of energetic characteristics of the normal and photoproduct forms of 3-hydroxyflavones. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:40-47. [PMID: 29902770 DOI: 10.1016/j.saa.2018.06.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 06/08/2023]
Abstract
We report spectroscopic properties of 3-hydroxyflavone (3-HF) and 4'-N,N-dimethylamino-3-hydroxyflavone (DMA3HF) in acetonitrile and ethyl acetate at different temperatures in the range from 10 °C to about 67 °C. These compounds are characterized by excited-state intramolecular proton transfer (ESIPT) which leads to occurrence of two forms of these molecules. For this reason their fluorescence spectra have two bands which correspond to emission of normal and photoproduct (tautomer) forms. The correlation between ratio of integrated intensity of these two bands and inverse absolute temperature (the Arrhenius plot) have been applied to estimate energetic properties, such as difference between energy levels of excited states as well ground states for normal and tautomer forms for each molecule.
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Affiliation(s)
- Dzmitryi V Ushakou
- Institute of Physics, Pomeranian University in Słupsk, 76-200 Słupsk, ul. Arciszewskiego, 22b, Poland.
| | - Vladimir I Tomin
- Institute of Physics, Pomeranian University in Słupsk, 76-200 Słupsk, ul. Arciszewskiego, 22b, Poland
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7
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Excited-state intramolecular proton transfer mechanism for 2-(quinolin-2-yl)-3-hydroxychromone: A detailed time-dependent density functional theory study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.094] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Zhao Y, Wang M, Zhou P, Yang C, Ma X, Tang Z, Bao D. The effect of benzo-annelation on intermolecular hydrogen bond and proton transfer of 2-methyl-3-hydroxy-4(1H)-quinolone in methanol: A TD-DFT study. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yanliang Zhao
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Panwang Zhou
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Chuanlu Yang
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Xiaoguang Ma
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
| | - Zhe Tang
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Dongshuai Bao
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai China
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9
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Han J, Liu X, Sun C, Li Y, Yin H, Shi Y. Ingenious modification of molecular structure effectively regulates excited-state intramolecular proton and charge transfer: a theoretical study based on 3-hydroxyflavone. RSC Adv 2018; 8:29589-29597. [PMID: 35547292 PMCID: PMC9085254 DOI: 10.1039/c8ra05812a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 08/09/2018] [Indexed: 12/16/2022] Open
Abstract
Harnessing ingenious modification of molecular structure to regulate excited-state intramolecular proton transfer (ESIPT) and intramolecular charge transfer (ICT) characteristics holds great promise in fluorescence sensing and imaging. Based on the 3-hydroxyflavone (3HF) molecule, 2-(2-benzo[b]furanyl)-3-hydroxychromone (3HB) and 2-(6-diethylamino-benzo[b]furan-2-yl)-3-hydroxychromone (3HBN) were designed by the extension of the furan heterocycle and the introduction of a diethylamino group. The analysis of important hydrogen bond length, frontier molecular orbitals, infrared spectra, and potential curves have cross-validated our results. The results indicate that proper site furan heterocycle extension and diethylamino donor group substitution not only shift the absorption and emission spectra to the red but also effectively modulate the excited-state dynamic behaviors. Strengthened ICT characteristics from 3HF to 3HB and to 3HBN make the occurrence of ESIPT increasingly difficult due to the higher energy barriers, which indicates that the ESIPT and ICT processes are competitive mechanisms. We envision that our work would open new windows for improving molecular properties and developing more fluorescent probes and organic radiation scintillators. Harnessing ingenious modification of molecular structure to regulate excited-state intramolecular proton transfer (ESIPT) and intramolecular charge transfer (ICT) characteristics holds great promise in fluorescence sensing and imaging.![]()
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Affiliation(s)
- Jianhui Han
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Xiaochun Liu
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Chaofan Sun
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - You Li
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Hang Yin
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Ying Shi
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
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10
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Patra M, Mukherjee R, Banik M, Dutta D, Begum NA, Basu T. Calcium phosphate-quercetin nanocomposite (CPQN): A multi-functional nanoparticle having pH indicating, highly fluorescent and anti-oxidant properties. Colloids Surf B Biointerfaces 2017; 154:63-73. [PMID: 28324689 DOI: 10.1016/j.colsurfb.2017.03.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/03/2017] [Accepted: 03/07/2017] [Indexed: 12/18/2022]
Abstract
Calcium phosphate quercetin nanocomposite (CPQN) i.e., quercetin entrapped in calcium phosphate nanoparticle was synthesized by a precipitation method at 80°C, taking ammonium hydrogen phosphate, calcium nitrate and quercetin as precursors and sodium citrate as stabilizer. The nanocomposite suspension had different color at different pH values, a property that could render the nanoparticle a pH indicator. Besides color, the particles also had different size, shape, stability and quercetin content with change of pH. In addition, the CPQN was highly fluorescent having two sharp emission peaks at 460 and 497nm, when excited at 370nm; by this property it behaved as an effective fluorophore to label biological cell. Moreover, the nanocomposite had potential anti-oxidant property, for which mortality of mouse neuroblastoma cell N2A, by H2O2-induced oxidative stress, was found to be lowered by the pre-treatment of the cells with CPQN.
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Affiliation(s)
- Mousumi Patra
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, West Bengal, India
| | - Riya Mukherjee
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, West Bengal, India
| | - Milon Banik
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, West Bengal, India
| | - Debanjan Dutta
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, West Bengal, India
| | - Naznin Ara Begum
- Department of Chemistry, Viswa Bharati University, Santiniketan, West Bengal, India
| | - Tarakdas Basu
- Department of Biochemistry & Biophysics, University of Kalyani, Kalyani 741 235, West Bengal, India.
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11
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Anderson SN, Richards JM, Esquer HJ, Benninghoff AD, Arif AM, Berreau LM. A Structurally-Tunable 3-Hydroxyflavone Motif for Visible Light-Induced Carbon Monoxide-Releasing Molecules (CORMs). ChemistryOpen 2015; 4:590-4. [PMID: 26491637 PMCID: PMC4608525 DOI: 10.1002/open.201500167] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Indexed: 11/22/2022] Open
Abstract
Molecules that can be used to deliver a controlled amount of carbon monoxide (CO) have the potential to facilitate investigations into the roles of this gaseous molecule in biology and advance therapeutic treatments. This has led to the development of light-induced CO-releasing molecules (photoCORMs). A goal in this field of research is the development of molecules that exhibit a combination of controlled CO release, favorable biological properties (e.g., low toxicity and trackability in cells), and structural tunability to affect CO release. Herein, we report a new biologically-inspired organic photoCORM motif that exhibits several features that are desirable in a next-generation photoCORM. We show that 3-hydroxyflavone-based compounds are easily synthesized and modified to impart changes in absorption features and quantum yield for CO release, exhibit low toxicity, are trackable in cells, and can exhibit both O2-dependent and -independent CO release reactivity.
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Affiliation(s)
- Stacey N Anderson
- Department of Chemistry & Biochemistry, Utah State University0300 Old Main Hill, Logan, UT, 84322-0300, USA
| | - Jason M Richards
- Department of Chemistry & Biochemistry, Utah State University0300 Old Main Hill, Logan, UT, 84322-0300, USA
| | - Hector J Esquer
- Department of Animal, Dairy, & Veterinary Science, Utah State University4815 Old Main Hill, Logan, UT, 84322-4815, USA
| | - Abby D Benninghoff
- Department of Animal, Dairy, & Veterinary Science, Utah State University4815 Old Main Hill, Logan, UT, 84322-4815, USA
| | - Atta M Arif
- Department of Chemistry, University of Utah315 S. 1400 E., Salt Lake City, UT, 84112-0850, USA
| | - Lisa M Berreau
- Department of Chemistry & Biochemistry, Utah State University0300 Old Main Hill, Logan, UT, 84322-0300, USA
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12
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Khanna R, Kumar R, Dalal A, Kamboj RC. Absorption and Fluorescent Studies of 3-Hydroxychromones. J Fluoresc 2015; 25:1159-63. [DOI: 10.1007/s10895-015-1623-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 07/05/2015] [Indexed: 11/28/2022]
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13
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Sichhart Y, Dräger B. Immunolocalisation of spermidine synthase in Solanum tuberosum. PHYTOCHEMISTRY 2013; 91:117-21. [PMID: 22445073 DOI: 10.1016/j.phytochem.2012.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 02/06/2012] [Accepted: 02/14/2012] [Indexed: 05/13/2023]
Abstract
Spermidine synthase (SPDS) catalyses the formation of spermidine, which is an essential polyamine and widespread in living organisms. Spermidine is formed from putrescine by transfer of an aminopropyl group from decarboxylated S-adenosylmethionine. Spermidine is also a precursor to further polyamines, such as spermine and thermospermine, most of which contribute to tolerance against drought and salinity in plants. Thermospermine is indispensible for vascular tissue growth. Plant spermidine synthases have been cloned from several angiosperms; organ-specific gene expression levels are known for Arabidopsis only. In this study, immunolocalisation of SPDS in potato (Solanum tuberosum) organs is presented. Polyclonal antibodies for SPDS from potato produced in rabbits were purified by affinity chromatography. Cross-reaction with potato putrescine N-methyltransferase was eliminated. Accumulation of SPDS protein in the phloem region of vascular tissues throughout the potato plant is demonstrated.
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Affiliation(s)
- Yvonne Sichhart
- Institut of Pharmacy, Faculty of Science I, Martin-Luther-University Halle-Wittenberg, Halle/Saale, Germany.
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14
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Doroshenko AO, Matsakov AY, Nevskii OV, Grygorovych OV. Excited state intramolecular proton transfer reaction revisited: S1 state or general reversibility? J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.09.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Pina-Luis G, Rosquete Pina GA, Valdés González AC, Terán AO, Espejel IR, Díaz-García ME. Morin functionalized Merrifield’s resin: A new material for enrichment and sensing heavy metals. REACT FUNCT POLYM 2012. [DOI: 10.1016/j.reactfunctpolym.2011.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Klymchenko AS, Duportail G, Mély Y. 3-Hydroxychromone Probes Precisely Located and Oriented in Lipid Bilayers: A Toolkit for Biomembrane Research. SPRINGER SERIES ON FLUORESCENCE 2012. [DOI: 10.1007/4243_2012_44] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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17
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Mezzetti A, Protti S, Lapouge C, Cornard JP. Protic equilibria as the key factor of quercetin emission in solution. Relevance to biochemical and analytical studies. Phys Chem Chem Phys 2011; 13:6858-64. [PMID: 21390357 DOI: 10.1039/c0cp00714e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed spectrofluorimetric study on quercetin in aqueous solution proves that its anionic forms are responsible for a strong fluorescence enhancement observed at pH > 6. Anion fluorescence is also observed in organic solvents with strong hydrogen bond acceptor properties. The results provide a new interpretation of biophysical and analytical literature data where the fluorescence of the anionic forms of quercetin has never been explicitly taken into account. In particular, comparison with published binding studies strongly suggests that quercetin deprotonation and consequent fluorescence enhancement takes place when the flavonoid binds to several biological macromolecules. This observation can be very helpful in the understanding at a molecular level of the interaction between quercetin and the biomolecule.
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Affiliation(s)
- Alberto Mezzetti
- Laboratoire de Photocatalyse et Biohydrogène, SB2SM, CNRS URA 2096, CEA-Saclay, DSV/iBiTecS, 91191 Gif-sur-Yvette cedex, France.
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18
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Chepeleva LV, Matsakov AY, Kondratyuk ZA, Yaremenko FG, Doroshenko AO. Pyrazolyc 3-hydroxychromones: Regulation of ESIPT reaction by the “flavonol-like” intramolecular hydrogen bonding to carbonyl group oxygen, which dominates over the “alternative” H-bond to heterocyclic nitrogen. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2009.11.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Agati G, Stefano G, Biricolti S, Tattini M. Mesophyll distribution of 'antioxidant' flavonoid glycosides in Ligustrum vulgare leaves under contrasting sunlight irradiance. ANNALS OF BOTANY 2009; 104:853-61. [PMID: 19633310 PMCID: PMC2749533 DOI: 10.1093/aob/mcp177] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Revised: 05/15/2009] [Accepted: 06/04/2009] [Indexed: 05/18/2023]
Abstract
BACKGROUND AND AIMS Flavonoids have the potential to serve as antioxidants in addition to their function of UV screening in photoprotective mechanisms. However, flavonoids have long been reported to accumulate mostly in epidermal cells and surface organs in response to high sunlight. Therefore, how leaf flavonoids actually carry out their antioxidant functions is still a matter of debate. Here, the distribution of flavonoids with effective antioxidant properties, i.e. the orthodihydroxy B-ring-substituted quercetin and luteolin glycosides, was investigated in the mesophyll of Ligustrum vulgare leaves acclimated to contrasting sunlight irradiance. METHODS In the first experiment, plants were grown at 20 % (shade) or 100% (sun) natural sunlight. Plants were exposed to 100 % sunlight irradiance in the presence or absence of UV wavelengths, in a second experiment. Fluorescence microspectroscopy and multispectral fluorescence microimaging were used in both cross sections and intact leaf pieces to visualize orthodihydroxy B-ring-substituted flavonoids at inter- and intracellular levels. Identification and quantification of individual hydroxycinnamates and flavonoid glycosides were performed via HPLC-DAD. KEY RESULTS Quercetin and luteolin derivatives accumulated to a great extent in both the epidermal and mesophyll cells in response to high sunlight. Tissue fluorescence signatures and leaf flavonoid concentrations were strongly related. Monohydroxyflavone glycosides, namely luteolin 4'-O-glucoside and two apigenin 7-O-glycosides were unresponsive to changes in sunlight irradiance. Quercetin and luteolin derivatives accumulated in the vacuoles of mesophyll cells in leaves growing under 100 % natural sunlight in the absence of UV wavelengths. CONCLUSIONS The above findings lead to the hypothesis that flavonoids play a key role in countering light-induced oxidative stress, and not only in avoiding the penetration of short solar wavelengths in the leaf.
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Affiliation(s)
- Giovanni Agati
- Istituto di Fisica Applicata ‘Carrara’, IFAC, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Firenze, Italy
| | - Giovanni Stefano
- Dipartimento di Ortoflorofrutticoltura, Università di Firenze, Viale delle Idee 30, I-50019, Sesto Fiorentino, Firenze, Italy
| | - Stefano Biricolti
- Dipartimento di Ortoflorofrutticoltura, Università di Firenze, Viale delle Idee 30, I-50019, Sesto Fiorentino, Firenze, Italy
| | - Massimiliano Tattini
- Istituto per la Valorizzazione del Legno e delle Specie Arboree, IVALSA, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, I-50019, Sesto Fiorentino, Firenze, Italy
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20
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Ash S, De SP, Pyne S, Misra A. Excited state intramolecular proton transfer in 3-hydroxy flavone and 5-hydroxy flavone: a DFT based comparative study. J Mol Model 2009; 16:831-9. [PMID: 19760438 DOI: 10.1007/s00894-009-0578-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Accepted: 08/07/2009] [Indexed: 11/26/2022]
Abstract
Potential energy (PE) curves for the intramolecular proton transfer in the ground (GSIPT) and excited (ESIPT) states of 3-hydroxy-flavone (3HF) and 5-hydroxy-flavone (5HF) were studied using DFT/B3LYP (6-31G (d,p)) and TD-DFT/B3LYP (6-31G (d,p)) level of theory respectively. Our calculations suggest the non-viability of ground state intramolecular proton transfer for both the compounds. Calculated PE curves of 3HF for the ground and excited singlet states proton transfer process explain its four state laser diagram. Excited states PE calculations support the ESIPT process to both 5HF and 3HF. The difference in ESIPT emission process of 3HF and 5HF have been explained in terms of HOMO and LUMO electron distribution of the enol and keto tautomer of these two compounds.
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Affiliation(s)
- Sankarlal Ash
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102, W.B, India
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21
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3-Hydroxybenzo[g]quinolones: dyes with red-shifted absorption and highly resolved dual emission. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.06.024] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Bilokin’ MD, Shvadchak VV, Yushchenko DA, Duportail G, Mély Y, Pivovarenko VG. Dual-Fluorescence Probe of Environment Basicity (Hydrogen Bond Accepting Ability) Displaying no Sensitivity to Polarity. J Fluoresc 2008; 19:545-53. [PMID: 19020962 DOI: 10.1007/s10895-008-0443-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2008] [Accepted: 11/11/2008] [Indexed: 10/21/2022]
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23
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Das R, Klymchenko AS, Duportail G, Mély Y. Excited State Proton Transfer and Solvent Relaxation of a 3-Hydroxyflavone Probe in Lipid Bilayers. J Phys Chem B 2008; 112:11929-35. [DOI: 10.1021/jp804956u] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ranjan Das
- Photophysique des Interactions Biomoléculaires, UMR 7175 du CNRS, Institut Gilbert Laustriat, Faculté de Pharmacie, Université Louis Pasteur, 67401 Illkirch, France, and Department of Chemistry, Bijoy Krishna Girls’ College, Howrah, West Bengal, India
| | - Andrey S. Klymchenko
- Photophysique des Interactions Biomoléculaires, UMR 7175 du CNRS, Institut Gilbert Laustriat, Faculté de Pharmacie, Université Louis Pasteur, 67401 Illkirch, France, and Department of Chemistry, Bijoy Krishna Girls’ College, Howrah, West Bengal, India
| | - Guy Duportail
- Photophysique des Interactions Biomoléculaires, UMR 7175 du CNRS, Institut Gilbert Laustriat, Faculté de Pharmacie, Université Louis Pasteur, 67401 Illkirch, France, and Department of Chemistry, Bijoy Krishna Girls’ College, Howrah, West Bengal, India
| | - Yves Mély
- Photophysique des Interactions Biomoléculaires, UMR 7175 du CNRS, Institut Gilbert Laustriat, Faculté de Pharmacie, Université Louis Pasteur, 67401 Illkirch, France, and Department of Chemistry, Bijoy Krishna Girls’ College, Howrah, West Bengal, India
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XIE L, MA J, DING YX. Synthesis of 3-Allyl-4-phosphachromones by Cyclized Coupling of Ethylo-Hydroxyphenyl(ethynyl)phosphinate with Allyl Bromide. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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New benzimidazolic 3-hydroxychromone derivative with two alternative mechanisms of the excited state intramolecular proton transfer reaction. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.09.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Rafts making and rafts braking: how plant flavonoids may control membrane heterogeneity. Mol Cell Biochem 2008; 314:65-71. [DOI: 10.1007/s11010-008-9766-9] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Accepted: 04/07/2008] [Indexed: 10/22/2022]
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27
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Mitra S, Singh TS, Mandal A, Mukherjee S. Experimental and computational study on photophysical properties of substituted o-hydroxy acetophenone derivatives: Intramolecular proton transfer and solvent effect. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Klymchenko AS, Yushchenko DA, Mély Y. Tuning excited state intramolecular proton transfer in 3-hydroxyflavone derivative by reaction of its isothiocyanate group with an amine. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.05.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Prasad De S, Ash S, Bar H, Kumar Bhui D, Dalai S, Misra A. Excited state intramolecular proton transfer in 5-hydroxy flavone: A DFT study. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.theochem.2007.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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30
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New 3-hydroxyflavone derivatives for probing hydrophobic sites in microheterogeneous systems. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.074] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Yushchenko DA, Shvadchak VV, Klymchenko AS, Duportail G, Pivovarenko VG, Mély Y. Steric control of the excited-state intramolecular proton transfer in 3-hydroxyquinolones: steady-state and time-resolved fluorescence study. J Phys Chem A 2007; 111:8986-92. [PMID: 17718453 DOI: 10.1021/jp071075t] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
3-Hydroxyquinolones (3HQs), similarly to their 3-hydroxychromone analogs, undergo excited state intramolecular proton transfer (ESIPT) resulting in dual emission. In the ground state, 2-phenyl-3HQ derivatives are not flat due to a steric hindrance between the 2-phenyl group and the 3-OH group that participates in the ESIPT reaction. To study the effect of this steric hindrance on the ESIPT reaction, a number of 3HQ derivatives have been synthesized and characterized in different organic solvents by steady-state and time-resolved fluorescence techniques. According to our results, 2-phenyl-3HQ derivatives undergo much faster ESIPT (by nearly 1 order of magnitude) than their 2-methyl-3HQ analogs. Moreover, 1-methyl-2-phenyl-3HQ having a strongly twisted 2-phenyl group undergoes a two- to three-fold slower ESIPT compared to 2-phenyl-3HQ. These results suggest that the flatter conformation of 2-phenyl-3HQ, which allows a close proximity of the 2-phenyl and 3-OH groups, favors a fast ESIPT reaction. The absorption and fluorescence spectra of the 3HQ derivatives additionally confirm that the steric rather than the electronic effect of the 2-phenyl group is responsible for the faster ESIPT reaction. Based on the spectroscopic studies and quantum chemical calculations, we suggest that the 2-phenyl group decreases the rotational freedom of its proximal 3-OH group in the more planar conformation of 2-phenyl-3HQ. As a result, the conformations of 3HQ, where the 3-OH group orients to form an intramolecular H-bond with the 4-carbonyl group, are favored over those with a disrupted intramolecular H-bond. Therefore, the 2-phenyl group sterically favors the intramolecular H-bond and thus accelerates the ESIPT reaction. This conclusion provides a new understanding of the ESIPT process in 3-hydroxyquinolones and related systems and suggests new possibilities for the design of ESIPT based molecular sensors and switchers.
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Affiliation(s)
- Dmytro A Yushchenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine.
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Dahlén K, Wallén EAA, Grøtli M, Luthman K. Synthesis of 2,3,6,8-tetrasubstituted chromone scaffolds. J Org Chem 2007; 71:6863-71. [PMID: 16930039 DOI: 10.1021/jo061008f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A useful and efficient synthetic strategy to 2,3,6,8-tetrasubstituted chromone derivatives has been developed. 2-Aryl/styryl-8-bromo-6-chloro-3-hydroxychromone derivatives were synthesized and used as scaffolds by introducing a variety of substituents in the 3-, 6-, and 8-positions using palladium-mediated reactions. Excellent regioselectivity in all positions could be obtained by performing reactions in the 8-position first, in which Stille, Heck, Suzuki, and Sonogashira reactions gave good to excellent yields of product (63-98%). Stille and Heck reactions in the 6-position also gave the desired products in good yields (64-86%). The hydroxy group in the 3-position was activated as a triflate and used in productive Stille reactions (63-94%). This hydroxyl group was also used in O-alkylation reactions with different functionalized alkyl bromides (57-88%). The flavonoids, which are based on the chromone structure, and other related ring systems, have several interesting biological activities. The chromones are also interesting structural scaffolds, and they have for example been designed to be used as mimetics of short peptides. The versatile applicability of chromone derivatives and especially their potential use in drug discovery implicates the importance of access to efficient synthetic routes to such compounds.
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Affiliation(s)
- Kristian Dahlén
- Department of Chemistry, Medicinal Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
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Funes M, Correa NM, Silber JJ, Biasutti A. Comparative Study of the Photophysical Behavior of Fisetin in Homogeneous Media and in Anionic and Cationic Reverse Micelles Media†. Photochem Photobiol 2007; 83:486-93. [PMID: 17115801 DOI: 10.1562/2006-08-08-ra-1000] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The 3,3', 4',7 tetrahydroxiflavone (fisetin) is a natural therapeutically active and fluorescent polyhydroxyflavone, with important spectroscopic and biological behavior. Fisetin shows dual emission, with a normal band (N) from the S1 --> S0 transition and the one generated in the excited state (phototautomer; PT) from the intramolecular proton transfer (ESIPT) process. The influence of different interfaces on the ESIPT process of fisetin was investigated in reverse micelles media (RMs) made of the anionic sodium 1,4-bis (2-ethylhexyl) sulfosuccinate (AOT) and cationic benzyl n-hexadecyl dimethylammonium chloride (BHDC) surfactants, in benzene. The studies were carried out by absorption, emission spectroscopy, steady-state anisotropy and time-resolved fluorescence measurements. Fisetin behavior was also investigated in homogeneous media with special emphasis in water and benzene, which are the polar core and the organic pseudofase in the RMs, respectively. In addition, the effect of concentration in benzene and the variation of the pH in water were studied. Fluorescence lifetime measurements show that in water the ESIPT process is independent on the concentration, while in benzene it was possible to detect fluorescent aggregate species (Nas) formed in the ground state. The effect of the pH in water allowed us to identify the anionic fisetin (A-) emission. The studies in RMs show that fisetin interacts specifically with the head of the surfactants, which always results in diminishing the emission of the PT. Also the formation of A- is detected particularly at W0 > 0. Appreciable high anisotropy values are obtained in RMs, as compared with those in fluid homogeneous media, which are independent of the water content confirming that fisetin molecules are anchored in the anionic as well as in the cationic interfaces.
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Affiliation(s)
- Matías Funes
- Departamento de Química, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
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Yushchenko DA, Vadzyuk OB, Kosterin SO, Duportail G, Mély Y, Pivovarenko VG. Sensing of adenosine-5'-triphosphate anion in aqueous solutions and mitochondria by a fluorescent 3-hydroxyflavone dye. Anal Biochem 2007; 369:218-25. [PMID: 17568555 DOI: 10.1016/j.ab.2007.05.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 05/03/2007] [Accepted: 05/04/2007] [Indexed: 11/23/2022]
Abstract
The current work demonstrates the formation of complexes between the tetraanion adenosine-5'-triphosphate (ATP) and the flavone derivative 3-hydroxy-4'-(dimethylamino)flavone (FME). Two kinds of complexes are evidenced. The higher affinity ATP-FME complex corresponds to a stacking of the two aromatic molecules and leads to a strong hypochromicity of the absorption spectrum of the dye. The lower affinity (ATP)(2)-FME complex results in a strong increase of the fluorescence intensity ( approximately 20-fold), due mainly to the appearance of the anionic form of FME, as shown by the important red shift (60 nm) of both excitation and emission spectra. Molecular modeling indicates that this anionic form results from the deprotonation induced by the influence of the tetra-charged triphosphate group of the ATP molecules. Using its strong enhancement of fluorescence intensity in the presence of ATP, the dye was used successfully to monitor the succinate-induced production of endogenous ATP in mitochondria. As a consequence, FME can be considered as a starting point to design efficient ATP sensors.
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Affiliation(s)
- Dmytro A Yushchenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine
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36
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Pappayee N, Mishra AK. Evaluation of 1-Naphthol as a Convenient Fluorescent Probe for Monitoring Ethanol-induced Interdigitation in Lipid Bilayer Membrane¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2001)0730573eonaac2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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M'Baye G, Klymchenko AS, Yushchenko DA, Shvadchak VV, Ozturk T, Mély Y, Duportail G. Fluorescent dyes undergoing intramolecular proton transfer with improved sensitivity to surface charge in lipid bilayers. Photochem Photobiol Sci 2007; 6:71-6. [PMID: 17200740 DOI: 10.1039/b611699j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
4'-(Dialkylamino)-3-hydroxyflavones are characterized by an excited-state proton transfer reaction between two tautomeric excited states, which results in two emission bands well separated on the wavelength scale. Due to the high sensitivity of the relative intensities of the two emission bands to solvent polarity, hydrogen bonding and local electric fields, these dyes found numerous applications in biomembrane studies. In order to further improve their fluorescence characteristics, we have synthesized new dyes where the 2-phenyl group is substituted with a 2-thienyl group. In organic solvents, the new dyes exhibit red shifted absorption and dual fluorescence. Although they show lower sensitivity to solvent polarity and H-bond donor ability (acidicity) than their parent 3-hydroxyflavone dyes, they exhibit a much higher sensitivity to solvent H-bond acceptor ability (basicity). Moreover, when tested in lipid vesicles of different surface charge, the new dyes show much better resolved dual emission and higher sensitivity to the surface charge of lipid bilayers than the parent dyes. The response of the new dyes to surface charge is probably connected with the H-bond basicity of the membrane surface, which is the highest for negatively charged surfaces. As a consequence, the new dyes appear as prospective fluorophores for the development of new fluorescent probes for biomembranes.
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Affiliation(s)
- Gora M'Baye
- Département de Pharmacologie et Physicochimie, Photophysique des Interactions Biomoléculaires, UMR 7175, Institut Gilbert Laustriat, 74 Route du Rhin, Université Louis Pasteur (Strasbourg I), BP 60024, 67401, Illkirch, France
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3-Hydroxy-4′-[di-(2-hydroxyethyl)amino]flavone as a new step in search of an ideal membrane ratiometric fluorescent probe. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.03.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Dyubko TS, Onishchenko EV, Pivovarenko VG. Influence of freezing and low molecular weight cryoprotectants on microsomal membrane structure: a study by multiparametric fluorescent probe. J Fluoresc 2006; 16:817-23. [PMID: 16977488 DOI: 10.1007/s10895-006-0089-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Accepted: 02/23/2006] [Indexed: 10/24/2022]
Abstract
The influence of low molecular weight cryoprotectants (CPs) such as glycerol (GL), 1,2-propanediol (PD) and dimethylsulfoxide (DMSO) on the structure of rat liver microsomal membranes on the stages of equilibration and upon freezing up to -196 degrees C was studied using a multiparametric fluorescent probe of flavonol nature. It was estimated that the studied CPs have individual concentration ranges defining low amplitude of their action on biomembranes. An exceeding of these ranges strongly increases the violation of membrane native structure already at the stage of incubation with CPs, strengthening it during the freezing procedure. According to the perturbation effect on microsomal membranes the studied CPs can be arranged in a sequence: DMSO>PD>GL.
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Affiliation(s)
- Tatyana S Dyubko
- Institute for Problems of Cryobiology and Cryomedicine, Ukrainian National Academy of Sciences, 23 Pereyaslavskaya Str., Kharkov, 61015, Ukraine
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Pereira RV, Gehlen MH. Photoinduced Intramolecular Charge Transfer in 9-Aminoacridinium Derivatives Assisted by Intramolecular H-Bond. J Phys Chem A 2006; 110:7539-46. [PMID: 16774194 DOI: 10.1021/jp0561470] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fluorochromic dyes derived from 9-aminoacridinium containing a vinylene function with electron withdrawing groups such as diethyl [(acridinium-9-ylamino)methylene]malonate (I), ethyl [(acridinium-9-ylamino)methylene]cyanoacetate (II), [(acridinium-9-ylamino)methylene]malononitrile (III), are prepared and studied in their monoprotonated form. Absorption spectra of the new dyes are red shifted compared to that of the precursor dye. The observed dual fluorescence and multiexponential decay are ascribed to normal emission from the acridinium chromophore in addition to excited-state intramolecular charge transfer (ESICT) process. However, biexponential decay character is observed only for the dicyano derivative (compound III), whereas for the two other systems, more complex kinetics and a three-component decay is recovered. The analysis of the fluorescence decays in different solvents for the first two compounds reveals two short-lived components in the range of 160-350 ps and 1.1-3.0 ns, related to formation and decay of the ESICT state, plus a third one with decay time of about 9 ns, which is ascribed to the normal emission from the acridinium chromophore as an enol tautomer or as an intramolecular H-bond conformer (closed form tautomer). For the dicyano derivative, in which the absence of carbonyl group precludes the H-bond interaction, the biexponential fitting reveals a slightly fast formation rate of the ESICT state with values on the order of 10(10) s(-1), whereas its decay time is between 0.6 and 3.2 ns, depending on the solvent used.
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Affiliation(s)
- Robson Valentim Pereira
- Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590, São Carlos-SP, Brazil
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Demchenko AP. Visualization and sensing of intermolecular interactions with two-color fluorescent probes. FEBS Lett 2006; 580:2951-7. [PMID: 16643906 DOI: 10.1016/j.febslet.2006.03.091] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Accepted: 03/22/2006] [Indexed: 11/20/2022]
Abstract
We developed a new generic fluorescence sensing technology based on the change of relative intensities between two well-separated emission bands of the novel functional 3-hydroxychromone (3HC) dyes. A greatly enhanced self-calibrating wavelength-ratiometric response is obtained to all major types of non-covalent interactions that can be used in sensing--to polarity, hydrogen bonding ability and to local electrostatic fields. This technology may find a broad range of applications--from homogeneous assays in solutions to microarrays, microfluidic devices, nanosensors and whole cell imaging systems. It allows transforming micelles or phospholipid vesicles into nanosensor devices. In cellular research a high sensitivity to membrane potentials can be obtained and the membrane changes during apoptosis detected.
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Affiliation(s)
- Alexander P Demchenko
- TUBITAK Research Institute for Genetic Engineering and Biotechnology (RIGEB), Marmara Research Center, 41470 Gebze-Kocaeli, Turkey.
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Synthesis and fluorescence properties of 2-aryl-3-hydroxyquinolones, a new class of dyes displaying dual fluorescence. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.11.160] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pivovarenko VG, Vadzyuk OB, Kosterin SO. Fluorometric detection of adenosine triphosphate with 3-hydroxy-4'-(dimethylamino)flavone in aqueous solutions. J Fluoresc 2006; 16:9-15. [PMID: 16400506 DOI: 10.1007/s10895-005-0020-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Accepted: 09/27/2005] [Indexed: 10/25/2022]
Abstract
An effect of appearance of new band in the excitation spectra of 3-hydroxy-4'-(dimethylamino)flavone (FME probe) in presence of adenosine triphosphate (ATP) is described. Considerable shift of new band up to the red and increase of fluorescence intensity points to the formation of FME-ATP associate, in which FME molecule undergoes to a strong electrostatic stabilization by tetra-charged ATP anion. It is shown the FME anion formation is possible under influence of ATP in the studied conditions. The dynamics of the observed effect is studied in mitochondria. The registered phenomenon allows the quantitative evaluation of ATP concentration in the range of 10(-3)-10(-5) M. In contrast to ATP, other nucleoside phosphates do not give a new band in the excitation spectra of FME probe. This implies the possibility of the in vivo determination of the ATP concentration.
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Affiliation(s)
- Vasyl G Pivovarenko
- Chemistry Department, National Taras Shevchenko University, Kyiv, 01033, Ukraine.
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Yushchenko DA, Shvadchak VV, Klymchenko AS, Duportail G, Mély Y, Pivovarenko VG. 2-Aryl-3-hydroxyquinolones, a new class of dyes with solvent dependent dual emission due to excited state intramolecular proton transfer. NEW J CHEM 2006. [DOI: 10.1039/b601400c] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Yushchenko DA, Shvadchak VV, Bilokin' MD, Klymchenko AS, Duportail G, Mély Y, Pivovarenko VG. Modulation of dual fluorescence in a 3-hydroxyquinolone dye by perturbation of its intramolecular proton transfer with solvent polarity and basicity. Photochem Photobiol Sci 2006; 5:1038-44. [PMID: 17077900 DOI: 10.1039/b610054f] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A representative of a new class of dyes with dual fluorescence due to an excited state intramolecular proton transfer (ESIPT) reaction, namely 1-methyl-2-(4-methoxy)phenyl-3-hydroxy-4(1H)-quinolone (QMOM), has been studied in a series of solvents covering a large range of polarity and basicity. A linear dependence of the logarithm of its two bands intensity ratio, log(I(N*)/I(T*)), upon the solvent polarity expressed as a function of the dielectric constant, (epsilon- 1)/(2epsilon + 1), is observed for a series of protic solvents. A linear dependence for log(I(N*)/I(T*)) is also found in aprotic solvents after taking into account the solvent basicity. In contrast, the positions of the absorption and the two emission bands of QMOM do not noticeably depend on the solvent polarity and basicity, indicating relatively small changes in the transition moment of QMOM upon excitation and emission. Time-resolved experiments in acetonitrile, ethyl acetate and dimethylformamide suggest an irreversible ESIPT reaction for this dye. According to the time-resolved data, an increase of solvent basicity results in a dramatic decrease of the ESIPT rate constant, probably due to the disruption of the intramolecular H-bond of the dye by the basic solvent. Due to this new sensor property, 3-hydroxyquinolones are promising candidates for the development of a new generation of environment-sensitive fluorescence dyes for probing interactions of biomolecules.
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Affiliation(s)
- Dmytro A Yushchenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, 01033, Kyiv, Ukraine
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Hendrich AB. Flavonoid-membrane interactions: possible consequences for biological effects of some polyphenolic compounds. Acta Pharmacol Sin 2006; 27:27-40. [PMID: 16364208 DOI: 10.1111/j.1745-7254.2006.00238.x] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Flavonoids are found ubiquitously in higher plants and constitute an important component of the majority of people daily diets. The biological activities of flavonoids cover a very broad spectrum, from anticancer and antibacterial activities through to inhibition of bone resorption. In the present paper, the interactions between flavonoids and lipid bilayers as well as biological membranes and their components are reviewed, with special emphasis on the structure-activity relationships and mechanisms underlying the biological activity of flavonoids.
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Altschuh D, Oncul S, Demchenko AP. Fluorescence sensing of intermolecular interactions and development of direct molecular biosensors. J Mol Recognit 2006; 19:459-77. [PMID: 17089349 DOI: 10.1002/jmr.807] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Molecular biosensors are devices of molecular size that are designed for sensing different analytes on the basis of biospecific recognition. They should provide two coupled functions - the recognition (specific binding) of the target and the transduction of information about the recognition event into a measurable signal. The present review highlights the achievements and prospects in design and operation of molecular biosensors for which the transduction mechanism is based on fluorescence. We focus on the general strategy of fluorescent molecular sensing, construction of sensor elements, based on natural and designed biopolymers (proteins and nucleic acids). Particular attention is given to the coupling of sensing elements with fluorescent reporter dyes and to the methods for producing efficient fluorescence responses.
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Affiliation(s)
- Danièle Altschuh
- UMR 7175 CNRS/ULP, ESBS, Parc d'Innovation, Bld S. Brant, BP 10413, 67412 Illkirch Cedex, France.
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Demchenko AP. The problem of self-calibration of fluorescence signal in microscale sensor systems. LAB ON A CHIP 2005; 5:1210-23. [PMID: 16234943 DOI: 10.1039/b507447a] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Most recent developments in fluorescent molecular sensor devices are based on "ON-OFF" switching, which is an operation with a single measurable parameter, commonly the quenching of total intensity. In the meantime, with this approach self-calibration on the molecular level is not achievable. This calibration is strongly needed in all kinds of microscale applications, including microarrays, microfluidic systems and living cell imaging. Different possibilities are discussed for overcoming this difficulty and an "OR-OR" switching concept is suggested that involves the two-channel detection as a promising solution. For achieving the desired efficiency specific conditions are needed: it should be a single reporter dye exhibiting rapid reversible excited-state reaction and providing two-band wavelength ratiometric response.
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Affiliation(s)
- Alexander P Demchenko
- TUBITAK Research Institute for Genetic Engineering and Biotechnology, 41470 Gebze-Kocaeli, Turkey.
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