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Molavi Tabrizi A, Goossens S, Mehdizadeh Rahimi A, Knepley M, Bardhan JP. Predicting solvation free energies and thermodynamics in polar solvents and mixtures using a solvation-layer interface condition. J Chem Phys 2017. [DOI: 10.1063/1.4977037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Amirhossein Molavi Tabrizi
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
| | - Spencer Goossens
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
| | - Ali Mehdizadeh Rahimi
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
| | - Matthew Knepley
- Department of Computational and Applied Mathematics, Rice University, Houston, Texas 77005, USA
| | - Jaydeep P. Bardhan
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
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Chattoraj S, Chowdhury R, Ghosh S, Bhattacharyya K. Heterogeneity in binary mixtures of dimethyl sulfoxide and glycerol: fluorescence correlation spectroscopy. J Chem Phys 2014; 138:214507. [PMID: 23758388 DOI: 10.1063/1.4808217] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Diffusion of four coumarin dyes in a binary mixture of dimethyl sulfoxide (DMSO) and glycerol is studied using fluorescence correlation spectroscopy (FCS). The coumarin dyes are C151, C152, C480, and C481. In pure DMSO, all the four dyes exhibit a very narrow (almost uni-modal) distribution of diffusion coefficient (Dt). In contrast, in the binary mixtures all of them display a bimodal distribution of Dt with broadly two components. One of the components of D(t) corresponds to the bulk viscosity. The other one is similar to that in pure DMSO. This clearly indicates the presence of two distinctly different nano-domains inside the binary mixture. In the first, the micro-environment of the solute consists of both DMSO and glycerol approximately at the bulk composition. The other corresponds to a situation where the first layer of the solute consists of DMSO only. The burst integrated fluorescence lifetime (BIFL) analysis also indicates presence of two micro-environments one of which resembles DMSO. The relative contribution of the DMSO-like environment obtained from the BIFL analysis is much larger than that obtained from FCS measurements. It is proposed that BIFL corresponds to an instantaneous environment in a small region (a few nm) around the probe. FCS, on the contrary, describes the long time trajectory of the probes in a region of dimension ~200 nm. The results are explained in terms of the theory of binary mixtures and recent simulations of binary mixtures containing DMSO.
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Affiliation(s)
- Shyamtanu Chattoraj
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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Pal K, Grampp G, Kattnig DR. Solvation dynamics of a radical ion pair in micro-heterogeneous binary solvents: a semi-quantitative study utilizing MARY line-broadening experiments. Chemphyschem 2013; 14:3389-99. [PMID: 23939826 DOI: 10.1002/cphc.201300435] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/15/2013] [Indexed: 11/10/2022]
Abstract
This work aims at elucidating the mechanism of solvation of a radical ion pair (RIP) in a micro-heterogeneous binary solvent mixture using magnetically affected reaction yield (MARY) spectroscopy. For the exciplex-forming 9,10-dimethylanthracene/N,N-dimethylaniline system a comparative, composition-dependent MARY line-broadening study is undertaken in a heterogeneous (toluene/dimethylsulfoxide) and a quasi-homogenous (propyl acetate/butyronitrile) solvent mixture. The half-saturation field extrapolated to zero-quencher concentration, B(1/2), and the self-exchange rate constants are analyzed in the light of solvent dynamical properties of the mixtures and a dielectric continuum solvation model. The dependence of B(1/2) on the solvent composition is explained by cluster formation giving rise to shortened RIP lifetimes. The results are in qualitative agreement with the continuum solvation model suggesting that it could serve as a theoretical basis for quantitative modeling.
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Affiliation(s)
- Kunal Pal
- Institute of Physical and Theoretical Chemistry, Graz University of Technolgy, Stremayrgasse 9/Z2, A-8010 Graz (Austria).
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Pal K, Kattnig DR, Grampp G, Landgraf S. Experimental observation of preferential solvation on a radical ion pair using MARY spectroscopy. Phys Chem Chem Phys 2012; 14:3155-61. [PMID: 22286393 DOI: 10.1039/c2cp23858f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effect of preferential solvation on the exciplex luminescence detected magnetic field effect has been studied using magnetic-field-effect-on-reaction-yield (MARY) spectroscopy. By designing solvent mixtures which can provide a micro-environment around the magneto-sensitive radical ion pair (RIP) from highly heterogeneous to quasi-homogenous, the effect of the polarity scan on an absolute magnetic field effect (χ(E)) and B(1/2) (the field value marking half saturation) has been studied on the system 9,10-dimethylanthracene (fluorophore)/N,N'-dimethylaniline (quencher). While the trend in χ(E) (although with subtle differences) follows the usual norm of passing through maxima with increasing polarity, the B(1/2) values show either a large monotonic decrease (for heterogeneous solvents) or remain constant (for quasi-homogenous systems) with increasing polarity. The observations have been interpreted invoking the concept of amplification of the "cage-effect" as a result of preferential solvation in binary solvents and its influence on the decaying exciplex. The use of ternary solvents further confirms the proposed mechanism. Additionally electron hopping from the radical ion pair to the surrounding neutral donor molecules could also possibly contribute to the observed trend.
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Affiliation(s)
- Kunal Pal
- Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9/I, A-8010 Graz, Austria
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Odinokov AV, Basilevsky MV, Nikitina EA. Association constants and distribution functions for ion pairs in binary solvent mixtures: Application to a cyanine dye system. J Chem Phys 2011; 135:144503. [DOI: 10.1063/1.3647955] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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Basilevsky M, Odinokov A, Nikitina E, Petrov N. The dielectric continuum solvent model adapted for treating preferential solvation effects. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2010.09.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Odinokov A, Leontyev I, Basilevsky M, Petrov NC. Potential of mean force for ion pairs in non-aqueous solvents. Comparison of polarizable and non-polarizable MD simulations. Mol Phys 2011. [DOI: 10.1080/00268976.2010.515259] [Citation(s) in RCA: 4] [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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Shim Y, Kim HJ. MD Study of Solvation in the Mixture of a Room-Temperature Ionic Liquid and CO2. J Phys Chem B 2010; 114:10160-70. [DOI: 10.1021/jp105021b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Youngseon Shim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Department of Chemistry, Seoul National University, Seoul 151-747, Korea, and School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Korea
| | - Hyung J. Kim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Department of Chemistry, Seoul National University, Seoul 151-747, Korea, and School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Korea
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Basilevsky MV, Grigoriev FV, Nikitina EA, Leszczynski J. Implicit Electrostatic Solvent Model with Continuous Dielectric Permittivity Function. J Phys Chem B 2010; 114:2457-66. [DOI: 10.1021/jp9064399] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mikhail V. Basilevsky
- Photochemistry Center and Institute of Applied Mechanics, Russian Academy of Sciences, Moscow, Russia, Research Computing Center, Moscow State University, Moscow, Russia, Dimonta LLC, Moscow, Russia, and Interdisciplinary Nanotoxicity Center, Jackson State University, Jackson, Mississippi 39217
| | - Fedor V. Grigoriev
- Photochemistry Center and Institute of Applied Mechanics, Russian Academy of Sciences, Moscow, Russia, Research Computing Center, Moscow State University, Moscow, Russia, Dimonta LLC, Moscow, Russia, and Interdisciplinary Nanotoxicity Center, Jackson State University, Jackson, Mississippi 39217
| | - Ekaterina A. Nikitina
- Photochemistry Center and Institute of Applied Mechanics, Russian Academy of Sciences, Moscow, Russia, Research Computing Center, Moscow State University, Moscow, Russia, Dimonta LLC, Moscow, Russia, and Interdisciplinary Nanotoxicity Center, Jackson State University, Jackson, Mississippi 39217
| | - Jerzy Leszczynski
- Photochemistry Center and Institute of Applied Mechanics, Russian Academy of Sciences, Moscow, Russia, Research Computing Center, Moscow State University, Moscow, Russia, Dimonta LLC, Moscow, Russia, and Interdisciplinary Nanotoxicity Center, Jackson State University, Jackson, Mississippi 39217
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Basilevsky M, Odinokov A, Nikitina E, Grigoriev F, Petrov N, Alfimov M. Advanced dielectric continuum model of preferential solvation. J Chem Phys 2009; 130:024505. [DOI: 10.1063/1.3010706] [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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