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Munakata T, Yao H. Fluorescent Organic Lewis-Pair Nanoparticles: Excited-State Intramolecular Proton Transfer Molecule 2-(2'-Hydroxyphenyl)benzothiazole Undergoes GSIPT Reactions To Be a Solid-State Nanoemitter. J Phys Chem B 2021; 125:13937-13945. [PMID: 34928617 DOI: 10.1021/acs.jpcb.1c09665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited-state intramolecular proton transfer (ESIPT) reaction, one of the fundamental photochemical processes, is known to occur in 2-(2'-hydroxyphenyl)benzothiazole (HBT), showing an enol-to-keto phototautomerization. In this article, Lewis-pair adduct formation is demonstrated between HBT (Lewis base) and diphenylborinic anhydride (DPBA; Lewis acid), in which the proton transfer occurs in the ground state to form the keto tautomer of HBT. The HBT/DPBA Lewis-pair adduct exhibits strong pale-blue fluorescence at 480 nm in dichloroethane. Additionally, organic Lewis-pair nanoparticles of HBT/DPBA are successfully synthesized on the basis of a reprecipitation protocol in which HBT in conjunction with DPBA dissolved in acetone was rapidly injected into water under ultrasonication. DPBA here also acts as a stabilizing or protecting agent to form spherical nanoparticles with well dispersion. The nanoparticles also exhibit strong keto-type emission centered at 490 nm, changing the emission color to bluish-green. Quantum chemical calculations find the sole formation of the keto tautomer of HBT counterpart in the Lewis pair. Importantly, the present synthesis methodology based on Lewis acid-base chemistry does not require complicated operations to organically synthesize solid-state emitters and thus will play a key role in simply controlling the emission behavior for the new type of organic nanoparticles.
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Affiliation(s)
- Taku Munakata
- Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
| | - Hiroshi Yao
- Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
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2
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Swain A, Cho B, Gautam R, Curtis CJ, Tomat E, Huxter V. Ultrafast Dynamics of Tripyrrindiones in Solution Mediated by Hydrogen-Bonding Interactions. J Phys Chem B 2019; 123:5524-5535. [DOI: 10.1021/acs.jpcb.9b01916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Alicia Swain
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Byungmoon Cho
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Ritika Gautam
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Clayton J. Curtis
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Elisa Tomat
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Vanessa Huxter
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
- Department of Physics, University of Arizona, Tucson, Arizona 85721, United States
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3
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Ernst HA, Wolf TJA, Schalk O, González-García N, Boguslavskiy AE, Stolow A, Olzmann M, Unterreiner AN. Ultrafast Dynamics of o-Nitrophenol: An Experimental and Theoretical Study. J Phys Chem A 2015; 119:9225-35. [PMID: 26266823 DOI: 10.1021/acs.jpca.5b04900] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The photolysis of o-nitrophenol (o-NP), a typical push-pull molecule, is of current interest in atmospheric chemistry as a possible source of nitrous acid (HONO). To characterize the largely unknown photolysis mechanism, the dynamics of the lowest lying excited singlet state (S1) of o-NP was investigated by means of femtosecond transient absorption spectroscopy in solution, time-resolved photoelectron spectroscopy (TRPES) in the gas phase and quantum chemical calculations. Evidence of the unstable aci-nitro isomer is provided both in the liquid and in the gas phase. Our results indicate that the S1 state displays strong charge transfer character, which triggers excited state proton transfer from the OH to the NO2 group as evidenced by a temporal shift of 20 fs of the onset of the photoelectron spectrum. The proton transfer itself is found to be coupled to an out-of-plane rotation of the newly formed HONO group, finally leading to a conical intersection between S1 and the ground state S0. In solution, return to S0 within 0.2-0.3 ps was monitored by stimulated emission. As a competitive relaxation channel, ultrafast intersystem crossing to the upper triplet manifold on a subpicosecond time scale occurs both in solution and in the gas phase. Due to the ultrafast singlet dynamics, we conclude that the much discussed HONO split-off is likely to take place in the triplet manifold.
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Affiliation(s)
- Hanna A Ernst
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT) , Kaiserstraße 12, 76131 Karlsruhe, Germany
| | - Thomas J A Wolf
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT) , Kaiserstraße 12, 76131 Karlsruhe, Germany.,Stanford PULSE Institute, SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
| | - Oliver Schalk
- AlbaNova University Centre, Stockholm University , Roslagstullsbacken 21, 10691 Stockholm, Sweden.,National Research Council of Canada , 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
| | - Núria González-García
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT) , Kaiserstraße 12, 76131 Karlsruhe, Germany
| | - Andrey E Boguslavskiy
- National Research Council of Canada , 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
| | - Albert Stolow
- National Research Council of Canada , 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada.,Departments of Chemistry & Physics, University of Ottawa , 10 Marie Curie, Ottawa, Ontario K1N 6N5 Canada
| | - Matthias Olzmann
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT) , Kaiserstraße 12, 76131 Karlsruhe, Germany
| | - Andreas-Neil Unterreiner
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT) , Kaiserstraße 12, 76131 Karlsruhe, Germany
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Park SY, Lee YS, Jang DJ. Ground-state proton-transfer dynamics governed by configurational optimization. Phys Chem Chem Phys 2011; 13:3730-6. [DOI: 10.1039/c0cp01977a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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5
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Ghosh R, Mondal JA, Palit DK. Ultrafast Dynamics of the Excited States of Curcumin in Solution. J Phys Chem B 2010; 114:12129-43. [DOI: 10.1021/jp1038249] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Rajib Ghosh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Jahur A. Mondal
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Dipak K. Palit
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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6
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Ghiggino KP. Photostabilization of Polymeric Materials. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2006. [DOI: 10.1080/10601329608014924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Lochbrunner S, Wurzer AJ, Riedle E. Microscopic Mechanism of Ultrafast Excited-State Intramolecular Proton Transfer: A 30-fs Study of 2-(2‘-Hydroxyphenyl)benzothiazole. J Phys Chem A 2003. [DOI: 10.1021/jp035203z] [Citation(s) in RCA: 201] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Lochbrunner
- Lehrstuhl für BioMolekulare Optik, Sektion Physik, Ludwig-Maximilians-Universität, Oettingenstrasse 67, D-80538 München, Germany
| | - Alexander J. Wurzer
- Lehrstuhl für BioMolekulare Optik, Sektion Physik, Ludwig-Maximilians-Universität, Oettingenstrasse 67, D-80538 München, Germany
| | - Eberhard Riedle
- Lehrstuhl für BioMolekulare Optik, Sektion Physik, Ludwig-Maximilians-Universität, Oettingenstrasse 67, D-80538 München, Germany
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8
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Stein M, Keck J, Waiblinger F, Fluegge AP, Kramer HEA, Hartschuh A, Port H, Leppard D, Rytz G. Influence of Polymer Matrixes on the Photophysical Properties of UV Absorbers. J Phys Chem A 2001. [DOI: 10.1021/jp012134k] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Stein
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Juergen Keck
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Frank Waiblinger
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Anja P. Fluegge
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Horst E. A. Kramer
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Achim Hartschuh
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Helmut Port
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - David Leppard
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
| | - Gerhard Rytz
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Rosental R 1059, CH-4002 Basle, Switzerland
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9
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Fournier T, Pommeret S, Mialocq JC, Deflandre A, Rozot R. Femtosecond laser studies of excited state intramolecular proton transfer in an ultraviolet-filter molecule. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00629-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Keck J, Roessler M, Schroeder C, Stueber GJ, Waiblinger F, Stein M, LeGourriérec D, Kramer HEA, Hoier H, Henkel S, Fischer P, Port H, Hirsch T, Rytz G, Hayoz P. Ultraviolet Absorbers of the 2-(2-Hydroxyaryl)-1,3,5-triazine Class and Their Methoxy Derivatives: Fluorescence Spectroscopy and X-ray Structure Analysis. J Phys Chem B 1998. [DOI: 10.1021/jp9818380] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Juergen Keck
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Manfred Roessler
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Christine Schroeder
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Guido J. Stueber
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Frank Waiblinger
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Martin Stein
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Denis LeGourriérec
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Horst E. A. Kramer
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Helga Hoier
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Sonja Henkel
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Peter Fischer
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Helmut Port
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Thomas Hirsch
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Gerhard Rytz
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Pascal Hayoz
- Institut für Physikalische Chemie and Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, 3.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany, and Ciba Specialty Chemicals, Inc., Additives Division, Research Center Fribourg, CH-1723 Marly 1, Switzerland
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11
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Keck J, Kramer HEA, Port H, Hirsch T, Fischer P, Rytz G. Investigations on Polymeric and Monomeric Intramolecularly Hydrogen-Bridged UV Absorbers of the Benzotriazole and Triazine Class. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961081h] [Citation(s) in RCA: 143] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jürgen Keck
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Horst E. A. Kramer
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Helmut Port
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Thomas Hirsch
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Peter Fischer
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
| | - Gerhard Rytz
- Institute für Physikalische Chemie und für Organische Chemie und Isotopenforschung, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany; and Ciba-Geigy Limited, Additives Division (AD 2.1), Research Center Fribourg, CH-1723 Marly 1, Switzerland
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Herbich J, Hung CY, Thummel RP, Waluk J. Solvent-Controlled Excited State Behavior: 2-(2‘-Pyridyl)indoles in Alcohols. J Am Chem Soc 1996. [DOI: 10.1021/ja952797d] [Citation(s) in RCA: 110] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jerzy Herbich
- Contribution from the Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland, and Department of Chemistry, University of Houston, Houston, Texas 77204-5641
| | - Chi-Ying Hung
- Contribution from the Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland, and Department of Chemistry, University of Houston, Houston, Texas 77204-5641
| | - Randolph P. Thummel
- Contribution from the Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland, and Department of Chemistry, University of Houston, Houston, Texas 77204-5641
| | - Jacek Waluk
- Contribution from the Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland, and Department of Chemistry, University of Houston, Houston, Texas 77204-5641
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Sustic A, Falcetta J, Smith C, Qin M, Vogl O. Functional Polymers. 61. Ultraviolet Spectral Behavior of Selected 2(2-Hydroxyphenyl)2H-Benzotriazoles. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1995. [DOI: 10.1080/10601329508013700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Reinvestigation of solvent catalyzed ground-state reverse proton transfer in 7-hydroxyquinoline. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00152-t] [Citation(s) in RCA: 16] [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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15
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Sobolewski AL, Domcke W. Theoretical investigation of potential energy surfaces relevant for excited-state hydrogen transfer in o-hydroxybenzaldehyde. Chem Phys 1994. [DOI: 10.1016/0301-0104(94)00091-3] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Gorman AA, Hamblett I, Srinivasan VS, Wood PD. Curcumin-derived transients: a pulsed laser and pulse radiolysis study. Photochem Photobiol 1994; 59:389-98. [PMID: 8022881 DOI: 10.1111/j.1751-1097.1994.tb05053.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In this paper we report a time-resolved investigation of transients derived from curcumin, which may be intimately involved in the processes leading to its biological activity. Fluorescence and triplet quantum yields are respectively 0.06 and 0.11. The high percentage of internal conversion is proposed to proceed via H-transfer within the thermodynamically favored enol structure of what is formally a 1,3-diketone. The triplet energy (191 +/- 2 kJ mol-1), natural lifetime (1.5 microseconds) and self-quenching rate constant (5.0 x 10(8) L mol-1 s-1) have been determined. Oxygen quenching of the triplet leads to the production of singlet oxygen with unit efficiency. Curcumin quenches the latter species very inefficiently (2.5 x 10(5) L mol-1 s-1). The curcumin radical has been produced via three mechanistically distinct methods. This species is unreactive toward oxygen but is repaired by vitamins C and E and anthralin.
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Affiliation(s)
- A A Gorman
- Chemistry Department, University of Manchester, UK
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Enchev V. AM1 study of ground state intramolecular proton transfer reaction in 2-(2′-hydroxy-5′-methylphenyl)benzotriazole and 2-(2′-hydroxyphenyl)benzotriazole. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0166-1280(93)90095-s] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Chirila TV, Barrett GD, Fletcher WA, Russo AV, Constable IJ. Further studies on ultraviolet-absorbing hydrogels for intraocular lenses: relationship between concentration of a polymerizable benzophenone, absorption, and extractability. J Cataract Refract Surg 1991; 17:596-603. [PMID: 1941593 DOI: 10.1016/s0886-3350(13)81047-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A tendency to reduce the use of benzophenone absorbers is currently evident in the manufacture of the UV-absorbing IOLs, mainly because the cutoff wavelengths are inferior to those provided by benzotriazoles. In principle, by incorporating large amounts of benzophenones it may be possible to achieve high cutoff wavelengths. A covalently bondable benzophenone UV absorber, Cyasorb UV-2098, was incorporated in poly(2-hydroxyethyl methacrylate) (PHEMA) in increasing concentrations, and certain associated phenomena were investigated. At 4% w/w absorber content, the nonhydrated polymers turned partially opaque. In water-swollen hydrogels, opacification occurred at a lower absorber content (2% w/w). By using extraction techniques and gas chromatography, we also found that up to 8% w/w of the absorber remained unpolymerized and could leach out from any material containing less than 5% w/w absorber. In samples with higher initial content of absorber, the amount of unreacted, leachable absorber was significantly higher (25% to 30%). Based on this study model (hydrogel/Cyasorb UV-2098), we concluded that benzophenone absorbers cannot provide cutoff wavelengths higher than those provided by benzotriazoles.
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Affiliation(s)
- T V Chirila
- Lions Eye Institute, Perth, Western Australia
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20
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Temperature dependence of fluorescence from polymer-bound 2-(2′-hydroxyphenyl)-2H-benzotriazole photostabilizers. J Photochem Photobiol A Chem 1991. [DOI: 10.1016/1010-6030(91)87040-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Joshi H, Tripathi H, Pant T, Pant D. Hydrogen-bonding effect on the dual emission of salicylic acid. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)85307-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Bruce JM, Dodd NJ, Gorman AA, Hamblett I, Kerr CW, Lambert C, McNeeney SP. Anthralin-derived transients--II. Formation of the radical by spontaneous fragmentation of both singlet and triplet states of the 10,10'-dehydrodimer: radical pair multiplicity effects. Photochem Photobiol 1990; 52:345-51. [PMID: 2217548 DOI: 10.1111/j.1751-1097.1990.tb04190.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The singlet and triplet states of the anthralin (1,8-dihydroxy-9-anthrone) dehydrodimer have been produced selectively in benzene via pulsed laser excitation and pulse radiolysis respectively. The lifetime of S1 is less than or equal to 30 ps, that of T1 short but unspecified. Both states fragment spontaneously to yield a pair of anthralin radicals. The singlet radical pair predominantly undergoes geminate recombination within the solvent cage. In contrast, the corresponding triplet radical pair undergoes essentially exclusive cage escape to give the anthralin free radical (lambda max 370, 490 and 720 nm) which recombines under normal diffusive conditions. Both recombination processes lead, at least in part, to one or more species which have been assigned as tautomeric forms of the original dimer. The anthralin free radical in benzene is insensitive to the vitamin E model 6-hydroxy-2,2,5,7,8-pentamethylchroman and reacts only slowly with oxygen.
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Affiliation(s)
- J M Bruce
- Chemistry Department, University of Manchester, UK
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23
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Wiechmann M, Port H, Laermer F, Frey W, Elsaesser T. Excited-state proton transfer in a benzotriazole photostabilizer investigated by femtosecond spectroscopy. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)87007-e] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bruce JM, Gorman AA, Hamblett I, Kerr CW, Lambert C, McNeeney SP. Anthralin-derived transients--I. The triplet state and the products of its reaction with oxygen in benzene. Photochem Photobiol 1989; 49:439-45. [PMID: 2727083 DOI: 10.1111/j.1751-1097.1989.tb09192.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Direct laser excitation in benzene of 1,8-dihydroxy-9-anthrone (anthralin) does not lead to transient species with lifetimes in the nanosecond time regime or longer. The triplet state has been produced in benzene by pulse radiolysis and characterised in terms of its absorption spectrum (lambda max 560 nm), natural lifetime (11 microseconds), self-quenching properties (kmicrosecond = 2.6 x 10(7) l mol-1 s-1) and triplet energy (234 kJ mol-1). There is no tendency in the non-polar medium for production of either the triplet or ground state in a tautomeric form. The observed triplet state reacts with oxygen with a typical rate constant, 2.2 x 10(9) l mol-1 s-1. The products of this reaction are singlet oxygen (approximately 64%) and the anthralin radical (approximately 14%).
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26
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Substituent effects on triplet yields in aminoanthraquinones: radiationless deactivation via intermolecular and intramolecular hydrogen bonding. J Photochem Photobiol A Chem 1988. [DOI: 10.1016/1010-6030(88)80040-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Bigger S, Ghiggino K, Leaver I, Scully A. Photophysics of 6-(2′-hydroxy-4′-methoxyphenyl)-s-triazine photostabilizers. J Photochem Photobiol A Chem 1987. [DOI: 10.1016/1010-6030(87)85016-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Waluk J, Komorowski S. Modification of photophysical behaviour by hydrogen bonding: Indoloquinoxaline and its methylated derivatives. Chem Phys Lett 1987. [DOI: 10.1016/0009-2614(87)87084-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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29
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Catalan J, Elguero J. Basicity and Acidity of Azoles. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 41 1987. [DOI: 10.1016/s0065-2725(08)60162-2] [Citation(s) in RCA: 173] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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30
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Itoh M, Fujiwara Y. The ground state tautomer in the excited state relaxation process of 3-hydroxyflavone at room temperature. Chem Phys Lett 1986. [DOI: 10.1016/0009-2614(86)80485-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Gupta A, Sarbolouki MN, Huston AL, Scott GW, Pradellok W, Vogl O. Photochemical Behavior in Copolymers of 2(2-Hydroxy-5-vinylphenyl)2H-benzotriazole and Methyl Methacrylate: Photochemical Processes in Polymeric Systems. 6. ACTA ACUST UNITED AC 1986. [DOI: 10.1080/00222338608069487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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32
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Boldridge DW, Scott GW. Excited singlet state absorption spectra and relaxation kinetics of the azanaphthalenes. J Chem Phys 1986. [DOI: 10.1063/1.450682] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Ernsting NP, Nikolaus B. Dye-laser pulse shortening by transient absorption following excited-state intramolecular proton transfer. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/bf00697413] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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O'Connor DB, Scott GW, Coulter DR, Gupta A, Webb S, Yeh SW, Clark J. Direct observation of the excited-state proton transfer and decay kinetics of internally hydrogen-bonded photostabilizers in copolymer films. Chem Phys Lett 1985. [DOI: 10.1016/0009-2614(85)87206-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Smulevich G. Resonance Raman and fluorescence spectra of 1.8 dihydroxyanthraquinone inn‐alkanes at low temperature. Evidence for excited state proton transfer. J Chem Phys 1985. [DOI: 10.1063/1.448787] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Mechanism of excited-state proton transfer in “double” benzoxazoles: Bis-2,5-(2-benzoxazolyl)hydroquinone. Chem Phys Lett 1984. [DOI: 10.1016/0009-2614(84)85525-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Gupta A. Long-term aging behavior of ultraviolet-absorbing intraocular lenses. JOURNAL - AMERICAN INTRA-OCULAR IMPLANT SOCIETY 1984; 10:309-14. [PMID: 6480482 DOI: 10.1016/s0146-2776(84)80002-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The chemical composition and molecular weight distribution of typical materials used for fabrication of intraocular lenses have been determined by high performance liquid chromatography and on-line electronic and FT-IR spectroscopic analysis. The leaching rate of unreacted monomers was determined by Soxhlet extraction techniques. These analytical methods were then utilized to monitor chemical changes in one type of intraocular lens subjected to accelerated aging conditions.
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Bocian DF, Huston AL, Scott GW. Low temperature spectroscopy of internally hydrogen‐bonded 2‐(2′‐hydroxy‐5′‐methylphenyl)‐benzotriazole in a mixed crystal. J Chem Phys 1983. [DOI: 10.1063/1.445768] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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39
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Flom S, Barbara P. The photodynamics of 2-(2′-hydroxy-5′-methylphenyl)-benzotriazole in low-temperature organic glasses. Chem Phys Lett 1983. [DOI: 10.1016/0009-2614(83)85038-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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