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Villnow T, Ryseck G, Rai-Constapel V, Marian CM, Gilch P. Chimeric Behavior of Excited Thioxanthone in Protic Solvents: I. Experiments. J Phys Chem A 2014; 118:11696-707. [DOI: 10.1021/jp5099393] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T. Villnow
- Institut für Physikalische Chemie and ‡Institut für Theoretische
Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstrasse
1, D-40225 Düsseldorf, Germany
| | - G. Ryseck
- Institut für Physikalische Chemie and ‡Institut für Theoretische
Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstrasse
1, D-40225 Düsseldorf, Germany
| | - V. Rai-Constapel
- Institut für Physikalische Chemie and ‡Institut für Theoretische
Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstrasse
1, D-40225 Düsseldorf, Germany
| | - C. M. Marian
- Institut für Physikalische Chemie and ‡Institut für Theoretische
Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstrasse
1, D-40225 Düsseldorf, Germany
| | - P. Gilch
- Institut für Physikalische Chemie and ‡Institut für Theoretische
Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstrasse
1, D-40225 Düsseldorf, Germany
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Rai-Constapel V, Salzmann S, Marian CM. Isolated and Solvated Thioxanthone: A Photophysical Study. J Phys Chem A 2011; 115:8589-96. [DOI: 10.1021/jp2022456] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vidisha Rai-Constapel
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Susanne Salzmann
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Christel M. Marian
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
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Fluorescence Properties and Dipole Moments of Novel Fused Thienobenzofurans. Solvent and Structural Effects. J Fluoresc 2011; 21:2133-41. [DOI: 10.1007/s10895-011-0914-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Accepted: 07/04/2011] [Indexed: 11/27/2022]
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Angulo G, Grilj J, Vauthey E, Serrano-Andrés L, Rubio-Pons Ò, Jacques P. Ultrafast Decay of the Excited Singlet States of Thioxanthone by Internal Conversion and Intersystem Crossing. Chemphyschem 2010; 11:480-8. [DOI: 10.1002/cphc.200900654] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Rai-Constapel V, Kleinschmidt M, Salzmann S, Serrano-Andrés L, Marian CM. Thioxanthone: on the shape of the first absorption band. Phys Chem Chem Phys 2010; 12:9320-7. [DOI: 10.1039/b925059j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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One-pot synthesis of water-soluble polymeric photoinitiator via thioxanthonation and sulfonation process. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2008.11.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yari A, Shamsipur M, Sharghi H. Theoretical study of the spectral behavior of the complex of a recently synthesized aminoxanthone derivative with copper(II) ion in water and methanol. J COORD CHEM 2008. [DOI: 10.1080/00958970701500932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- A. Yari
- a Department of Chemistry , Lorestan University , Khorramabad, Iran
| | - M. Shamsipur
- b Department of Chemistry , Razi University , Kermanshah, Iran
| | - H. Sharghi
- c Department of Chemistry , Shiraz University , Shiraz, Iran
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Krystkowiak E, Maciejewski A, Kubicki J. Spectral and Photophysical Properties of Thioxanthone in Protic and Aprotic Solvents: The Role of Hydrogen Bonds in S1-Thioxanthone Deactivation. Chemphyschem 2006; 7:597-606. [PMID: 16514691 DOI: 10.1002/cphc.200500375] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Spectral and photophysical properties of thioxanthone (9H-thioxanthen-9-one, TX) were determined in a few protic solvents (H2O, D2O, hexafluoro-2-propanol) and compared with those in aprotic solvents. On the basis of the time-resolved and steady-state emission measurements and available literature data, it has been shown that the dominant S1-TX deactivation process in protic solvents is the formation of the S1-complex. The important modes of deactivation of the S1-complex are fluorescence (phiF approximately 0.4-0.5) and intersystem crossing to the T1 state. The S1-complex-->S0 internal conversion plays, at most, an insignificant role in S1-complex deactivation, which is evidenced by the absence of an isotope effect of protic solvents on the lifetime and quantum yield of fluorescence.
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Affiliation(s)
- Ewa Krystkowiak
- Photochemistry Laboratory, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland.
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Demets GJF, Triboni ER, Alvarez EB, Arantes GM, Filho PB, Politi MJ. Solvent influence on the photophysical properties of 4-methoxy-N-methyl-1,8-naphthalimide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:220-6. [PMID: 15978866 DOI: 10.1016/j.saa.2005.05.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 05/09/2005] [Accepted: 05/10/2005] [Indexed: 05/03/2023]
Abstract
4-Methoxy-N-methyl-1,8-naphthalimide (1) exhibits considerable solvatochromism and its UV-vis spectral properties have been studied in several polar/non-polar and protic/aprotic solvents, as well as in ethanol-water mixtures. The results reveal a strong influence of the solvent's polarity and its hydrogen-bond donor (HBD) capability on the photophysical properties of 1. For binary ethanol/water mixtures, preferential solvation models describe the band shifts in the probe's visible absorption spectrum well, but they fail to describe the corresponding shifts of the emission maxima. Pseudolinear approximations between solvent composition and molecule's transition energies, E(T), can be used to study the composition of ethanol-water mixtures, simplifying the mathematical treatment for eventual analytical applications.
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Affiliation(s)
- Grégoire J-F Demets
- Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Dos Bandeirantes 3900, CEP 14040-901, Ribeirão Preto, S.P., Brazil.
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Ley C, Morlet-Savary F, Fouassier J, Jacques P. The spectral shape dependence of xanthone triplet–triplet absorption on solvent polarity. J Photochem Photobiol A Chem 2000. [DOI: 10.1016/s1010-6030(00)00374-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ley C, Morlet-Savary F, Jacques P, Fouassier J. Solvent dependence of the intersystem crossing kinetics of thioxanthone. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00056-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Time dependent solvent effects on the T1–Tn absorption spectra of thioxanthone: a picosecond investigation. J Photochem Photobiol A Chem 1999. [DOI: 10.1016/s1010-6030(99)00117-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Burget D, Jacques P. Unusual solvent effects on the fluorescence quenching rate constants of a thioxanthone derivative by n-butylamine and isoprene. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00583-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sousa C, Sá e Melo T, Gèze M, Gaullier JM, Mazière JC, Santus R. Solvent polarity and pH effects on the spectroscopic properties of neutral red: application to lysosomal microenvironment probing in living cells. Photochem Photobiol 1996; 63:601-7. [PMID: 8628751 DOI: 10.1111/j.1751-1097.1996.tb05662.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Neutral red is a lysosomal probe and a biological pH indicator. In aqueous solutions, the protonated (NRH) and neutral (NR) forms of monomeric neutral red exhibit distinct absorption maxima (535 and 450 nm, respectively) but have the same fluorescence with a maximum at 637 nm and a quantum yield of 0.02. The similarity of the fluorescence spectra at acidic and basic pH suggests deprotonation of cationic species in the first singlet excited state. The NR fluorescence strongly depends on the solvent polarity as shown by addition of increasing amounts of water to pure dioxane, which gradually shifts the fluorescence maximum from 540 nm in pure dioxane to 637 nm in water. The fluorescence quantum yield increases from 0.17 in dioxane to 0.3 upon addition of 7% water and then decreases, reaching 0.02 in pure water. Immediately after incubation of human skin fibroblasts with neutral red, excitation with 435 nm light produces a fluorescence whose maximum is recorded at 575 nm. This fluorescence is located in the perinuclear region and originates from large fluorescent intracytoplasmic spots, suggesting staining of the endoplasmic reticulum-Golgi complex. At longer times, this fluorescence is shifted to 606 nm, suggesting slow diffusion of the lysosomotropic dye toward the more hydrated and acidic interior of lysosomes. Addition of a lysosomotropic detergent to cells previously incubated with neutral red shifts the fluorescence to the blue. Thus, in complex biological systems, this probe cannot be a good pH indicator but is a very sensitive probe of lysosomal microenvironments.
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Affiliation(s)
- C Sousa
- Instituto Superior Técnico, Centro de Química Física Molecular, Lisboa, Portugal
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Melo TS, Bazin M, Ronfard-Haret JC, Santus R. QUANTIFICATION OF THE SOLVENT EFFECTS ON THE TRIPLET QUANTUM YIELD OF PSORALEN BY THE "LINEAR SOLVATION ENERGY RELATIONSHIP". Photochem Photobiol 1993. [DOI: 10.1111/j.1751-1097.1993.tb04897.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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