1
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Zhang L, Fassioli F, Fu B, She ZS, Scholes GD. Modeling Excited-State Proton Transfer Using the Lindblad Equation: Quantification of Time-Resolved Spectroscopy with Mechanistic Insights. ACS PHYSICAL CHEMISTRY AU 2022; 3:107-118. [PMID: 36718263 PMCID: PMC9881171 DOI: 10.1021/acsphyschemau.2c00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 12/24/2022]
Abstract
The quantum dynamics of excited-state intramolecular proton transfer (ESIPT) is studied using a multilevel vibronic Hamiltonian and the Lindblad master equation. We simulate time-resolved fluorescence spectroscopy of 2-(2'-hydroxyphenyl) benzothiazole (HBT) and 10-hydroxybenzo[h]quinoline (HBQ), which suggests that the underlying mechanism behind the initial ultrafast rise and decay in the spectra is electronic state population that evolves simultaneously with proton wave packet dynamics. The results predict that the initial rise and decay signals at different wavelengths vary significantly with system properties in terms of their shape, the time, and the intensity of the maximum. These findings provide clues for data interpretation, mechanism validation, and control of the dynamics, and the model serves as an attempt toward clarifying ESIPT by direct comparison to time-resolved spectroscopy.
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Affiliation(s)
- Luhao Zhang
- Department
of Chemistry, Princeton University, Princeton, New Jersey08544, United States
| | - Francesca Fassioli
- Department
of Chemistry, Princeton University, Princeton, New Jersey08544, United States,SISSA
− Scuola Internazionale Superiore di Studi Avanzati, 34136Trieste, TS, Italy,
| | - Bo Fu
- Department
of Chemistry, Princeton University, Princeton, New Jersey08544, United States
| | - Zhen-Su She
- Department
of Mechanical and Engineering Science, Peking
University, Beijing100871, China,. Phone: +86-010-62766559
| | - Gregory D. Scholes
- Department
of Chemistry, Princeton University, Princeton, New Jersey08544, United States,. Phone: +1-609-258-0729
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2
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Kumpulainen T, Lang B, Rosspeintner A, Vauthey E. Ultrafast Elementary Photochemical Processes of Organic Molecules in Liquid Solution. Chem Rev 2016; 117:10826-10939. [DOI: 10.1021/acs.chemrev.6b00491] [Citation(s) in RCA: 249] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tatu Kumpulainen
- Department of Physical Chemistry,
Sciences II, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland
| | - Bernhard Lang
- Department of Physical Chemistry,
Sciences II, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland
| | - Arnulf Rosspeintner
- Department of Physical Chemistry,
Sciences II, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry,
Sciences II, University of Geneva, 30 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland
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3
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Min C, Pinto da Silva L, Esteves da Silva JCG, Yang X, Huang S, Ren A, Zhu Y. A Computational Investigation of the Equilibrium Constants for the Fluorescent and Chemiluminescent States of Coelenteramide. Chemphyschem 2016; 18:117-123. [DOI: 10.1002/cphc.201600850] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/04/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Chun‐Gang Min
- Research Center for Analysis and Measurement Kunming University of Science and Technology Kunming 650093 P. R. China
| | - Luís Pinto da Silva
- Centro de Investigaçäo em Química (CIQ-UP), Departamento de Química e Bioquímica Faculdade de Ciências da Universidade do Porto Rua Campo Alegra 687 4169-007 Porto Portugal
| | - Joaquim C. G. Esteves da Silva
- Centro de Investigaçäo em Química (CIQ-UP), Departamento de Química e Bioquímica Faculdade de Ciências da Universidade do Porto Rua Campo Alegra 687 4169-007 Porto Portugal
| | - Xi‐Kun Yang
- Research Center for Analysis and Measurement Kunming University of Science and Technology Kunming 650093 P. R. China
| | - Shao‐Jun Huang
- Research Center for Analysis and Measurement Kunming University of Science and Technology Kunming 650093 P. R. China
| | - Ai‐Min Ren
- Institute of Theoretical Chemistry Jilin University Changchun 130023 P. R. China
| | - Yan‐Qin Zhu
- Research Center for Analysis and Measurement Kunming University of Science and Technology Kunming 650093 P. R. China
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4
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Kipriyanov AA, Kipriyanov AA, Doktorov AB. The general theory of multistage geminate reactions of isolated pairs of reactants. III. Two-stage reversible dissociation in geminate reaction A + A↔ C↔ B + B. J Chem Phys 2016; 144:144110. [DOI: 10.1063/1.4945626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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5
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Reigh SY. Multiple external field effects on diffusion-limited reversible reactions for a geminate pair with no interparticle interactions. J Chem Phys 2015; 143:084118. [DOI: 10.1063/1.4928641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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6
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Echeverria C, Kapral R. Diffusional correlations among multiple active sites in a single enzyme. Phys Chem Chem Phys 2015; 16:6211-6. [PMID: 24562416 DOI: 10.1039/c3cp55252g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Simulations of the enzymatic dynamics of a model enzyme containing multiple substrate binding sites indicate the existence of diffusional correlations in the chemical reactivity of the active sites. A coarse-grain, particle-based, mesoscopic description of the system, comprising the enzyme, the substrate, the product and solvent, is constructed to study these effects. The reactive and non-reactive dynamics is followed using a hybrid scheme that combines molecular dynamics for the enzyme, substrate and product molecules with multiparticle collision dynamics for the solvent. It is found that the reactivity of an individual active site in the multiple-active-site enzyme is reduced substantially, and this effect is analyzed and attributed to diffusive competition for the substrate among the different active sites in the enzyme.
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Affiliation(s)
- Carlos Echeverria
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada.
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7
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Kipriyanov AA, Doktorov AB. General theory of the multistage geminate reactions of the isolated pairs of reactants. II. Detailed balance and universal asymptotes of kinetics. J Chem Phys 2014; 141:144105. [DOI: 10.1063/1.4897257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Alexey A. Kipriyanov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
| | - Alexander B. Doktorov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia and Novosibirsk State University, Novosibirsk 630090, Russia
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8
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Doktorov AB, Kipriyanov AA. General theory of multistage geminate reactions of isolated pairs of reactants. I. Kinetic equations. J Chem Phys 2014; 140:184104. [PMID: 24832250 DOI: 10.1063/1.4874001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
General matrix approach to the consideration of multistage geminate reactions of isolated pairs of reactants depending on reactant mobility is formulated on the basis of the concept of "effective" particles. Various elementary reactions (stages of multistage reaction including physicochemical processes of internal quantum state changes) proceeding with the participation of isolated pairs of reactants (or isolated reactants) are taken into account. Investigation has been made in terms of kinetic approach implying the derivation of general (matrix) kinetic equations for local and mean probabilities of finding any of the reaction species in the sample under study (or for local and mean concentrations). The recipes for the calculation of kinetic coefficients of the equations for mean quantities in terms of relative coordinates of reactants have been formulated in the general case of inhomogeneous reacting systems. Important specific case of homogeneous reacting systems is considered.
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Affiliation(s)
- Alexander B Doktorov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Alexey A Kipriyanov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
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9
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Reigh SY. Effect of an external electric field on the diffusion-influenced geminate reversible reaction of a neutral particle and a charged particle in three dimensions. IV. Excited-state ABCD reaction. J Chem Phys 2014; 140:064502. [DOI: 10.1063/1.4864202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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10
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Reigh SY. Effect of an external electric field on the diffusion-influenced geminate reversible reaction of a neutral particle and a charged particle in three dimensions. III. Ground-state ABCD reaction. J Chem Phys 2013; 139:194107. [DOI: 10.1063/1.4830401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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11
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Khokhlova SS, Agmon N. Green's function for reversible geminate reaction with volume reactivity. J Chem Phys 2013; 137:184103. [PMID: 23163360 DOI: 10.1063/1.4764357] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The kinetics of a diffusing particle near a reversible trap may be described by an extension of the Feynman-Kac equation to the case of reversible binding, which can occur within a finite reaction sphere. We obtain the Green's function solution for the Laplace transform of this equation when the particle is initially either bound or unbound. We study the solution in the time-domain by either inverting the Laplace transform numerically or propagating the partial differential equation in the time-domain. We show that integrals of this solution over the reaction sphere agree with previously obtained solutions.
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Affiliation(s)
- Svetlana S Khokhlova
- The Fritz Haber Research Center, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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12
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Abstract
Ultrafast photochemical processes can occur in parallel with the relaxation of the optically populated excited state toward equilibrium. The latter involves both intra- and intermolecular modes, namely vibrational and solvent coordinates, and takes place on timescales ranging from a few tens of femtoseconds to up to hundreds of picoseconds, depending on the system. As a consequence, the reaction dynamics can substantially differ from those usually measured with slower photoinduced processes occurring from equilibrated excited states. For example, the decay of the excited-state population may become strongly nonexponential and depend on the excitation wavelength, contrary to the Kasha and Vavilov rules. In this article, we first give a brief account of our current understanding of vibrational and solvent relaxation processes. We then present an overview of important classes of ultrafast photochemical reactions, namely electron and proton transfer as well as isomerization, and illustrate with several examples how nonequilibrium effects can affect their dynamics.
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Affiliation(s)
- Arnulf Rosspeintner
- Department of Physical Chemistry, University of Geneva, CH-1211 Geneve 8, Switzerland
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13
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Spies C, Finkler B, Acar N, Jung G. Solvatochromism of pyranine-derived photoacids. Phys Chem Chem Phys 2013; 15:19893-905. [DOI: 10.1039/c3cp53082e] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Shalashilin DV, Beddard GS, Paci E, Glowacki DR. Peptide kinetics from picoseconds to microseconds using boxed molecular dynamics: Power law rate coefficients in cyclisation reactions. J Chem Phys 2012; 137:165102. [DOI: 10.1063/1.4759088] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Reigh SY, Kim HJ. Direct Calculation Method for Excited-state Diffusion-influenced Reversible Reactions with an External Field. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.3.1015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Chen JX, Kapral R. Mesoscopic dynamics of diffusion-influenced enzyme kinetics. J Chem Phys 2011; 134:044503. [DOI: 10.1063/1.3528004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Botti H, Möller MN, Steinmann D, Nauser T, Koppenol WH, Denicola A, Radi R. Distance-dependent diffusion-controlled reaction of •NO and O2•- at chemical equilibrium with ONOO-. J Phys Chem B 2010; 114:16584-93. [PMID: 21067212 DOI: 10.1021/jp105606b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The fast reaction of (•)NO and O(2)(•-) to give ONOO(-) has been extensively studied at irreversible conditions, but the reasons for the wide variations in observed forward rate constants (3.8 ≤ k(f) ≤ 20 × 10(9) M(-1) s(-1)) remain unexplained. We characterized the diffusion-dependent aqueous (pH > 12) chemical equilibrium of the form (•)NO + O(2)(•-) = ONOO(-) with respect to its dependence on temperature, viscosity, and [ONOO(-)](eq) by determining [ONOO(-)](eq) and [(•)NO](eq). The equilibrium forward reaction rate constant (k(f)(eq)) has negative activation energy, in contrast to that found under irreversible conditions. In contradiction to the law of mass action, we demonstrate that the equilibrium constant depends on ONOO(-) concentration. Therefore, a wide range of k(f)(eq) values could be derived (7.5-21 × 10(9) M(-1) s(-1)). Of general interest, the variations in k(f) can thus be explained by its dependence on the distance between ONOO(-) particles (sites of generation of (•)NO and O(2)(•-)).
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Affiliation(s)
- Horacio Botti
- Unidad de Cristalografía de Proteínas, Instituto Pasteur de Montevideo, Montevideo, 11400, Uruguay.
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18
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Effect of an external field on the reversible reaction of a neutral particle and a charged particle in three dimensions. II. Excited-state reaction. J Chem Phys 2010; 132:164112. [DOI: 10.1063/1.3394894] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Park K, Shin KJ, Kim H. Excited-State Reversible Geminate A*+B↔C*+D Reaction in Two Dimensions. Chem Asian J 2010. [DOI: 10.1002/asia.200900585] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Park K, Shin KJ, Kim H. Excited-state reversible geminate recombination in two dimensions. J Chem Phys 2009; 131:154105. [PMID: 20568845 DOI: 10.1063/1.3242273] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Excited-state reversible geminate recombination with two different lifetimes and quenching is investigated in two dimensions. From the exact Green function in the Laplace domain, analytic expressions of two-dimensional survival and binding probabilities are obtained at short and long times. We find that a new pattern of kinetic transition occurs in two dimensions. The long-time effective survival probabilities show a pattern of (ln t)(-1)-->constant-->e(t) depending on the rate constants while the effective binding probabilities show t(-1)(ln t)(-2)-->t(-1)-->e(t).
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Affiliation(s)
- Kihyun Park
- Department of Chemistry, Seoul National University, Seoul 151-747, Republic of Korea
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21
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Kaneko S, Yotoriyama S, Koda H, Tobita S. Excited-state proton transfer to solvent from phenol and cyanophenols in water. J Phys Chem A 2009; 113:3021-8. [PMID: 19265389 DOI: 10.1021/jp8086489] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excited-state proton transfer (ESPT) to solvent from phenol (PhOH) and cyanophenols (CNOHs) in water was studied by means of time-resolved fluorescence and photoacoustic spectroscopy. A characteristic property of PhOH and CNOHs is that the fluorescence quantum yields of the deprotonated forms are remarkably small (< or = 10(-3)) and the lifetimes are extremely short (< or = 30 ps). Time-resolved fluorescence measurements for PhOH, CNOHs, and their methoxy analogues at 298 K indicate that o- and m-cyanophenols (o- and m-CNOH) undergo rapid ESPT to the solvent water with rate constants of 6.6 x 10(10) and 2.6 x 10(10) s(-1), respectively, whereas the fluorescence properties of PhOH and p-CNOH does not exhibit clear evidence of the ESPT reaction. Photoacoustic measurements show that photoexcitation of o- and m-CNOH in water results in negative volume changes, supporting the occurrence of ESPT to produce a geminate ion pair. In contrast, the volume contractions for the PhOH and p-CNOH solutions are negligibly small, which indicates that, in these compounds, the yields of solvent-separated ion pairs resulting from the ESPT are very small. The volume change per absorbed Einstein (DeltaV(r)) for o-CNOH is obtained to be -5.0 mL Einstein(-1), which is much smaller than the estimated volume contraction per photoconverted mole (DeltaV(R)). This suggests that the geminate recombination between the ejected proton and the cyanophenolate anion occurs after rapid deactivation of the excited ion pair. In the temperature range between 275 and 323 K, the proton dissociation rates of o- and m-CNOH in H(2)O and D(2)O are slower than the solvent relaxation rates evaluated from the Debye dielectric relaxation time, indicating that the overall rate constant is determined mainly by the proton motion along the reaction coordinate.
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Affiliation(s)
- Shigeo Kaneko
- Department of Chemistry and Chemical Biology, Gunma University, Kiryu, Gunma 376-8515, Japan
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22
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Kaneko S, Yoshihara T, Tobita S. The Rate of Excited-state Proton Transfer to Solvent from Trifluoromethylphenols in Water. CHEM LETT 2009. [DOI: 10.1246/cl.2009.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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24
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Jung G, Gerharz S, Schmitt A. Solvent-dependent steady-state fluorescence spectroscopy for searching ESPT-dyes: solvatochromism of HPTS revisited. Phys Chem Chem Phys 2009; 11:1416-26. [DOI: 10.1039/b816695a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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25
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Reigh SY, Shin KJ, Tachiya M. Effect of an external electric field on the diffusion-influenced reversible reaction of a neutral particle and a charged particle in three dimensions. J Chem Phys 2008; 129:234501. [DOI: 10.1063/1.3035986] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Park S, Shin KJ. Diffusion-influenced excited-state reversible geminate ABCD reaction in the presence of an external field. Chem Asian J 2008; 3:1266-76. [PMID: 18553320 DOI: 10.1002/asia.200800028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We obtained the exact Green functions, in the Laplace domain, for a diffusion-influenced excited-state reversible geminate ABCD reaction with two different lifetimes and quenching processes under a constant external field in one dimension. Analytic expressions for the survival probabilities of the initial and final states are obtained in the time domain at short and long times, respectively. The short-time approximations obtained in this work are valid for t</K/(-1), where K depends on several parameters of the system. The analysis of the long-time asymptotic behaviors reveals rather complex kinetic transitions dependent upon the field and lifetimes. We also find a destructive interplay leading to the reduction in the number of kinetic transitions similar to that found for the excited-state geminate ABC reaction with an external field in one dimension.
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Affiliation(s)
- Soohyung Park
- Department of Chemistry, Seoul National University, Korea
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27
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Park S, Shin KJ. Diffusion-influenced reversible geminate ABCD reaction in the presence of an external field. J Phys Chem B 2008; 112:6241-9. [PMID: 18047314 DOI: 10.1021/jp075933x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigate a diffusion-influenced ground-state reversible geminate ABCD reaction in the presence of a constant external field in one dimension. In the Laplace domain, we first obtain the nonreactive Green function from which the reactive Green function is derived. Analytic asymptotic expressions of the survival probability are obtained in the time domain for both short and long time regions. There exist four regimes for the equilibrium survival probability according to the signs of the field intensities a1 and a2 that reactant and product states feel, respectively. Analysis of the long-time asymptotic behavior of the survival probability shows two regimes depending on the sign of a parameter K( identical with a(2)(2)D(2) -a(2)(1)D(1)), where D(1) and D(2) are the relative diffusion constants of corresponding states, respectively. Combining these two results, we predict a total of eight regimes for the long-time asymptotic behavior of the survival probability. We find that the long-time asymptotic behavior of the deviation of the effective survival probability shows the t(-3/2) power law when m( identical with min {a(2)(1)D(1), a(2)(2)D(2)}) not equal 0, whereas it shows t(-1/2) power law when m = 0. When one of the fields is turned off, the long-time asymptotic behavior of the survival probability shows a kinetic transition as the sign of the remaining field changes.
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Affiliation(s)
- Soohyung Park
- Department of Chemistry, Seoul National University, Seoul 151-747, Korea
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28
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Kwon OH, Kim TG, Lee YS, Jang DJ. Biphasic Tautomerization Dynamics of Excited 7-Hydroxyquinoline in Reverse Micelles. J Phys Chem B 2006; 110:11997-2004. [PMID: 16800508 DOI: 10.1021/jp0573184] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The excited-state tautomerization dynamics of 7-hydroxyquinoline in the water pools of reverse micelles has been investigated by monitoring time-resolved fluorescence spectra and kinetics as well as static absorption and emission spectra with a variation of water content and isotopic fractionation. The normal and the tautomeric species are found to reside preferentially in the bound- and the free-water regions of the micelles, respectively. The excited-state tautomerization of the normal species in the bound-water layers is suggested to occur via two different channels, depending on rotamers at the moment of excitation. The cis tautomerizes via proton relay from the enol group to the imino group along a hydrogen-bonded water bridge, unusual in water but common in alcohols, whereas the trans tautomerizes via the stepwise individual acid-base reactions of two prototropic groups as found in bulk water. Proton relay can take place because water in the pools has substantially reduced polarity and disrupted hydrogen-bond networks compared with bulk water.
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Affiliation(s)
- Oh-Hoon Kwon
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
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29
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Park HJ, Kwon OH, Ah CS, Jang DJ. Excited-State Tautomerization Dynamics of 7-Hydroxyquinoline in β-Cyclodextrin. J Phys Chem B 2005; 109:3938-43. [PMID: 16851447 DOI: 10.1021/jp046817m] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited-state tautomerization dynamics of 7-hydroxyquinoline encapsulated in beta-cyclodextrin is compared with that in pure water by measuring isotope-dependent fluorescence kinetics as well as absorption and emission spectra. The normal species tautomerizes stepwise via forming anionic intermediate species in both systems. However, the enol-deprotonation time (40 ps in water) becomes as large as 170 ps whereas the imine-protonation time of the anionic intermediate (160 ps in water) becomes as short as 85 ps in beta-cyclodextrin. The slow formation and the fast decay of the anionic species are attributed to the unstability of the charged species in hydrophobic cages. Encapsulation can be utilized to enhance fluorescence enormously and to accelerate selective reactions by retarding other processes.
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Affiliation(s)
- Han Jung Park
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
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30
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Abstract
The absorption of a photon by a hydroxy-aromatic photoacid triggers a cascade of events contributing to the overall phenomenon of intermolecular excited-state proton transfer. The fundamental steps involved were studied over the last 20 years using a combination of theoretical and experimental techniques. They are surveyed in this sequel in sequential order, from fast to slow. The excitation triggers an intramolecular charge transfer to the ring system, which is more prominent for the anionic base than the acid. The charge redistribution, in turn, triggers changes in hydrogen-bond strengths that set the stage for the proton-transfer step itself. This step is strongly influenced by the solvent, resulting in unusual dependence of the dissociation rate coefficient on water content, temperature, and isotopic substitution. The photolyzed proton can diffuse in the aqueous solution in a mechanism that involves collective changes in hydrogen-bonding. On longer times, it may recombine adiabatically with the excited base or quench it. The theory for these diffusion-influenced geminate reactions has been developed, showing nice agreement with experiment. Finally, the effect of inert salts, bases, and acids on these reactions is analyzed.
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Affiliation(s)
- Noam Agmon
- Department of Physical Chemistry and the Fritz Haber Research Center, The Hebrew University, Jerusalem 91904, Israel.
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Park S, Shin KJ, Agmon N. Exact solution of the excited-state geminate A*+B⇄C*+D reaction with two different lifetimes and quenching. J Chem Phys 2004; 121:868-76. [PMID: 15260617 DOI: 10.1063/1.1755658] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The authors obtain, in the Laplace transform space, the exact analytic solution for the Green function and survival probabilities for the excited-state diffusion-influenced reversible geminate reaction, A*+B <==> C*+D, with two different lifetimes and in the presence of an added quenching process. This extends a previous investigation by Popov and Agmon [J. Chem. Phys. 117, 5770 (2002)] of the ground-state reaction without quenching. The long-time asymptotic behavior of the survival probabilities is obtained in the time domain. It is found to be different from the equal-lifetime case. This paper also provides a useful short-time approximation for the kinetics.
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Affiliation(s)
- Soohyung Park
- School of Chemistry, Seoul National University, Seoul 151-747, Korea
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32
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Yu H, Kwon OH, Jang DJ. Migration of Protons during the Excited-State Tautomerization of Aqueous 3-Hydroxyquinoline. J Phys Chem A 2004. [DOI: 10.1021/jp031293w] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hyunung Yu
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
| | - Oh-Hoon Kwon
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
| | - Du-Jeon Jang
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
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33
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Kim H, Shin KJ. Diffusion-influenced reversible geminate recombination in one dimension. III. Field effect on the excited-state reaction. J Chem Phys 2004; 120:9142-50. [PMID: 15267850 DOI: 10.1063/1.1704632] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We obtain exact analytic solutions of the diffusion-influenced excited-state reversible geminate recombination reaction, A* + B<-->(AB)*, with two different lifetimes and quenching under the influence of a constant external field in one dimension. These fundamental solutions generalize two previous results [Kim et al., J. Chem. Phys. 111, 3791 (1999); 114, 3905 (2001)] and provide us with the insight necessary to analyze their specific relations and asymptotic kinetic transition behaviors. We find that the number of kinetic transitions can be changed due to interplay between the field strength and lifetimes. Unlike the previous works, the number of lifetime dependent transitions is found to be one or zero. On the other hand, the number of the field dependent transitions becomes two, one, or zero. We find a new pattern of kinetic transition e(t)-->t(-1/2)-->e(t) when there is only one field dependent transition.
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Affiliation(s)
- Hyojoon Kim
- School of Chemistry, Seoul National University, Seoul 151-747, Korea
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34
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Leiderman P, Ben-Ziv M, Genosar L, Huppert D, Solntsev KM, Tolbert LM. Study of the Long-Time Fluorescence Tail of the Green Fluorescent Protein. J Phys Chem B 2004. [DOI: 10.1021/jp037786i] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pavel Leiderman
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Moran Ben-Ziv
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Liat Genosar
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Dan Huppert
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Kyril M. Solntsev
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
| | - Laren M. Tolbert
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400
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35
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Popov AV, Agmon N. Transition into non-monotonic approach to equilibrium in geminate exchange reaction. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00303-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Popov AV, Agmon N. Three-dimensional simulations of reversible bimolecular reactions. II. The excited-state target problem with different lifetimes. J Chem Phys 2002. [DOI: 10.1063/1.1496455] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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37
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Affiliation(s)
- Noam Agmon
- Department of Physical Chemistry, The Hebrew University, Jerusalem 91904, Israel
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38
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Clower C, Solntsev KM, Kowalik J, Tolbert LM, Huppert D. Photochemistry of “Super” Photoacids. 3. Excited-State Proton Transfer from Perfluoroalkylsulfonyl-Substituted 2-Naphthols. J Phys Chem A 2002. [DOI: 10.1021/jp012774n] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Caroline Clower
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, and School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Kyril M. Solntsev
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, and School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Janusz Kowalik
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, and School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Laren M. Tolbert
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, and School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dan Huppert
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, and School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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39
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Tolbert LM, Solntsev KM. Excited-state proton transfer: from constrained systems to "super" photoacids to superfast proton transfer. Acc Chem Res 2002; 35:19-27. [PMID: 11790085 DOI: 10.1021/ar990109f] [Citation(s) in RCA: 599] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have used knowledge of the electronic structure of excited states of acids to design molecules that exhibit enhanced excited-state acidity. Such "super" photoacids are the strongest reversible photoacids known and allow the time evolution of proton transfer to be examined in a wide array of organic solvents. This includes breaking/formation of the hydrogen bonds in hundreds of femtoseconds, solvent reorientation and relaxation in picoseconds, proton dissociation, and, finally, diffusion and geminate recombination of the dissociated proton, observed in nanoseconds.
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Affiliation(s)
- Laren M Tolbert
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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40
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Solntsev KM, Huppert D, Agmon N. Challenge in Accurate Measurement of Fast Reversible Bimolecular Reaction. J Phys Chem A 2001. [DOI: 10.1021/jp004569y] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kyril M. Solntsev
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Dan Huppert
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978, Israel
| | - Noam Agmon
- The Fritz Haber Research Center, Department of Physical Chemistry, The Hebrew University, Jerusalem 91904, Israel
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