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Clark R, Nawawi MA, Dobre A, Pugh D, Liu Q, Ivanov AP, White AJP, Edel JB, Kuimova MK, McIntosh AJS, Welton T. The effect of structural heterogeneity upon the microviscosity of ionic liquids. Chem Sci 2020; 11:6121-6133. [PMID: 32874514 PMCID: PMC7448533 DOI: 10.1039/d0sc02009e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/26/2020] [Indexed: 01/25/2023] Open
Abstract
The behaviour of two molecular rotors, one charged - 3,3'-diethylthiacarbocyanine iodide (Cy3) and one neutral - 8-[4-decyloxyphenyl]-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY-C10), have been studied in various ionic liquids. The fluorescent decay lifetime has been used to elucidate the structure of the immediate region around the rotor. The neutral BODIPY-C10 was found to prefer the non-polar alkyl chain environment, leading to two trends in the lifetime of the dye: one when it was fully partitioned into the non-polar domain, and one when it also sampled polar moieties. The positively charged Cy3 dye showed a complex relationship between the bulk viscosity of the ionic liquid and lifetime of the molecular rotor. This was attributed to a combination of polarity related spectral changes, changes in anion cages around the dye, and temperature dependent fluorescent lifetimes alongside the dependence of the rotor upon the viscosity.
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Affiliation(s)
- Ryan Clark
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Mohd A Nawawi
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Ana Dobre
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - David Pugh
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK . .,Department of Chemistry , Kings College London , Britannia House, 7 Trinity Street , London , SE1 1DB , UK
| | - Qingshan Liu
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK . .,School of Science , Shenyang Agricultural University , Shenyang 110866 , P. R. China
| | - Aleksandar P Ivanov
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Andrew J P White
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Joshua B Edel
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Marina K Kuimova
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Alastair J S McIntosh
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
| | - Tom Welton
- Department of Chemistry , Molecular Science Research Hub , Imperial College London , 80 Wood Lane , London , W12 0BZ , UK .
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Isomerization and Dimerization of Indocyanine Green and a Related Heptamethine Dye. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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3
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Szabó Á, Szendi-Szatmári T, Ujlaky-Nagy L, Rádi I, Vereb G, Szöllősi J, Nagy P. The Effect of Fluorophore Conjugation on Antibody Affinity and the Photophysical Properties of Dyes. Biophys J 2018; 114:688-700. [PMID: 29414714 PMCID: PMC5985035 DOI: 10.1016/j.bpj.2017.12.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/04/2017] [Accepted: 12/14/2017] [Indexed: 11/25/2022] Open
Abstract
Because the degree of labeling (DOL) of cell-bound antibodies, often required in quantitative fluorescence measurements, is largely unknown, we investigated the effect of labeling with two different fluorophores (AlexaFluor546, AlexaFluor647) in a systematic way using antibody stock solutions with different DOLs. Here, we show that the mean DOL of the cell-bound antibody fraction is lower than that of the stock using single molecule fluorescence measurements. The effect is so pronounced that the mean DOL levels off at approximately two fluorophores/IgG for some antibodies. We developed a method for comparing the average DOL of antibody stocks to that of the isolated, cell-bound fraction based on fluorescence anisotropy measurements confirming the aforementioned conclusions. We created a model in which individual antibody species with different DOLs, present in an antibody stock solution, were assumed to have distinct affinities and quantum yields. The model calculations confirmed that a calibration curve constructed from the anisotropy of antibody stocks can be used for determining the DOL of the bound fraction. The fluorescence intensity of the cell-bound antibody fractions and of the antibody stocks exhibited distinctly different dependence on the DOL. The behavior of the two dyes was systematically different in this respect. Fitting of the model to these data revealed that labeling with each dye affects quantum yield and antibody affinity differentially. These measurements also implied that fluorophores in multiply labeled antibodies exhibit self-quenching and lead to decreased antibody affinity, conclusions directly confirmed by steady-state intensity measurements and competitive binding assays. Although the fluorescence lifetime of antibodies labeled with multiple fluorophores decreased, the magnitude of this change was not sufficient to account for self-quenching indicating that both dynamic and static quenching processes occur involving H-aggregate formation. Our results reveal multiple effects of fluorophore conjugation, which must not be overlooked in quantitative cell biological measurements.
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Affiliation(s)
- Ágnes Szabó
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tímea Szendi-Szatmári
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - László Ujlaky-Nagy
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Ildikó Rádi
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - György Vereb
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - János Szöllősi
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Peter Nagy
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
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Wang C, Yuan Y. The influence of aggregation on the third-order nonlinear optical property of π-conjugated chromophores: the case of cyanine dyes. Phys Chem Chem Phys 2018; 20:16777-16785. [DOI: 10.1039/c8cp00770e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The typical J cyanine aggregate is experimentally and theoretically found to have potential applications involving two photon absorption.
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Affiliation(s)
- Chao Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yizhong Yuan
- Key Laboratory for Ultrafine Materials of Ministry of Education and Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- Department of Material Science and Engineering
- East China University of Science and Technology
- Shanghai
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5
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Zakharova GV, Zhizhimov DA, Sazonov SK, Avakyan VG, Gromov SP, Görner H, Chibisov AK. Photoprocesses of alkyl meso-thiacarbocyanine dyes in the presence of cucurbit[7]uril. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.01.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Zakharova GV, Zhizhimov DA, Avakyan VG, Sazonov SK, Gromov SP, Chibisov AK. Specificity of photonics of 3,3′-diethyl-5,5′-dichloro-9-ethylthiacarbocyanine dimers in the presence of cucurbit[7]uril. HIGH ENERGY CHEMISTRY 2014. [DOI: 10.1134/s0018143914020131] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Adamson BD, Coughlan NJA, da Silva G, Bieske EJ. Photoisomerization Action Spectroscopy of the Carbocyanine Dye DTC+ in the Gas Phase. J Phys Chem A 2013; 117:13319-25. [DOI: 10.1021/jp405747q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Brian D. Adamson
- School of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
| | - Neville J. A. Coughlan
- School of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
| | - Gabriel da Silva
- School of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
| | - Evan J. Bieske
- School of Chemistry and ‡Department of
Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
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Guarin CA, Villabona-Monsalve JP, López-Arteaga R, Peon J. Dynamics of the Higher Lying Excited States of Cyanine Dyes. An Ultrafast Fluorescence Study. J Phys Chem B 2013; 117:7352-62. [DOI: 10.1021/jp400278t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Cesar A. Guarin
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito
Exterior, Ciudad Universitaria, México, 04510, D.F., México
| | - Juan. P. Villabona-Monsalve
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito
Exterior, Ciudad Universitaria, México, 04510, D.F., México
| | - Rafael López-Arteaga
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito
Exterior, Ciudad Universitaria, México, 04510, D.F., México
| | - Jorge Peon
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito
Exterior, Ciudad Universitaria, México, 04510, D.F., México
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10
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Görner H, Slavnova TD, Chibisov AK. Kinetics of Spontaneous Formation of Chiral J-Aggregate of N-Sulfobutyl Oxacarbocyanine. J Phys Chem B 2010; 114:9330-7. [DOI: 10.1021/jp100521d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Helmut Görner
- Max-Planck-Institut für Bioanorganische Chemie, D-45413 Mülheim an der Ruhr, Germany, and Center of Photochemistry, Russian Academy of Sciences, 119421 Moscow, Russia
| | - Tatyana D. Slavnova
- Max-Planck-Institut für Bioanorganische Chemie, D-45413 Mülheim an der Ruhr, Germany, and Center of Photochemistry, Russian Academy of Sciences, 119421 Moscow, Russia
| | - Alexander K. Chibisov
- Max-Planck-Institut für Bioanorganische Chemie, D-45413 Mülheim an der Ruhr, Germany, and Center of Photochemistry, Russian Academy of Sciences, 119421 Moscow, Russia
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