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Alekseev ES, Alentiev AY, Belova AS, Bogdan VI, Bogdan TV, Bystrova AV, Gafarova ER, Golubeva EN, Grebenik EA, Gromov OI, Davankov VA, Zlotin SG, Kiselev MG, Koklin AE, Kononevich YN, Lazhko AE, Lunin VV, Lyubimov SE, Martyanov ON, Mishanin II, Muzafarov AM, Nesterov NS, Nikolaev AY, Oparin RD, Parenago OO, Parenago OP, Pokusaeva YA, Ronova IA, Solovieva AB, Temnikov MN, Timashev PS, Turova OV, Filatova EV, Philippov AA, Chibiryaev AM, Shalygin AS. Supercritical fluids in chemistry. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4932] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ng Pack G, Rotondaro MC, Shah PP, Mandal A, Erramilli S, Ziegler LD. Two-dimensional infrared spectroscopy from the gas to liquid phase: density dependent J-scrambling, vibrational relaxation, and the onset of liquid character. Phys Chem Chem Phys 2019; 21:21249-21261. [PMID: 31538165 DOI: 10.1039/c9cp04101j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultrafast 2DIR spectra and pump-probe responses of the N2O ν3 asymmetric stretch in SF6 as a function of density from the gas to supercritical phase and liquid are reported. 2DIR spectra unequivocally reveal free rotor character at all densities studied in the gas and supercritical region. Analysis of the 2DIR spectra determines that J-scrambling or rotational relaxation in N2O is highly efficient, occurring in ∼1.5 to ∼2 collisions with SF6 at all non-liquid densities. In contrast, N2O ν3 vibrational energy relaxation requires ∼15 collisions, and complete vibrational equilibrium occurs on the ∼ns scale at all densities. An independent binary collision model is sufficient to describe these supercritical state point dynamics. The N2O ν3 in liquid SF6 2DIR spectrum shows no evidence of free rotor character or spectral diffusion. Using these 2DIR results, hindered rotor or liquid-like character is found in gas and all supercritical solutions for SF6 densities ≥ρ* = 0.3, and increases with SF6 density. 2DIR spectral analysis offers direct time domain evidence of critical slowing for SF6 solutions closest to the critical point density. Applications of 2DIR to other high density and supercritical solution dynamics and descriptions are discussed.
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Affiliation(s)
- Greg Ng Pack
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and Photonics Center, Boston University, Boston, MA 02215, USA
| | - Matthew C Rotondaro
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and Photonics Center, Boston University, Boston, MA 02215, USA
| | - Parth P Shah
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and Photonics Center, Boston University, Boston, MA 02215, USA
| | - Aritra Mandal
- Department of Chemistry, University of Colorado, Boulder, CO 80309, USA
| | - Shyamsunder Erramilli
- Photonics Center, Boston University, Boston, MA 02215, USA and Department of Physics, Boston University, Boston, MA 02215, USA
| | - L D Ziegler
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and Photonics Center, Boston University, Boston, MA 02215, USA
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Dellis D, Skarmoutsos I, Samios J. Solvation Structure and Dynamics of cis- and trans-1,2 Dichloroethene Isomers in Supercritical Carbon Dioxide. A Molecular Dynamics Simulation Study. J Phys Chem B 2011; 115:12098-107. [DOI: 10.1021/jp204202p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Dimitris Dellis
- University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis 157-71, Athens, Greece
| | - Ioannis Skarmoutsos
- Department of Chemistry, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jannis Samios
- University of Athens, Department of Chemistry, Laboratory of Physical Chemistry, Panepistimiopolis 157-71, Athens, Greece
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5
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Umecky T, Kanakubo M, Ikushima Y. Fluorination effects on rotational correlation times of tris(β-diketonato)aluminum(III) in CO2 by 27Al NMR relaxation measurements. J Phys Chem B 2011; 115:10622-30. [PMID: 21815618 DOI: 10.1021/jp110037g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
(27)Al NMR longitudinal relaxation times, T(1,obs)((27)Al), of [Al(acac)(3)] and [Al(hfa)(3)] (Hacac = acetylacetone, Hhfa = hexafluoroacetylacetone) in CH(3)CN and CO(2) were measured over a wide range of temperature and pressure. The rotational correlation times, τ(r), of the tris(β-diketonato)aluminum(III) complexes were determined from T(1,obs)((27)Al) using (27)Al quadrupole coupling constants, eQq/h((27)Al), which were also obtained to be 3.11 and 3.22 MHz for [Al(acac)(3)] and [Al(hfa)(3)], respectively, in CD(3)CN by the dual spin probe technique in the present study. At each temperature, τ(r) increased almost linearly with increasing viscosity, η, in both CH(3)CN and CO(2); however, τ(r) in CO(2) at near critical densities deviated appreciably upward, as shown in a similar analogue of bis(acetylacetonato)beryllium(II), [Be(acac)(2)] (Umecky; et al. J. Phys. Chem. B 2002, 106, 11114). The η/T dependence of τ(r) was examined to discuss intermolecular interactions between the complexes and solvent molecules in terms of the fluorination and geometrical effects. The degree of solute-solvent interactions increases in the order [Be(acac)(2)] < [Al(hfa)(3)] < [Al(acac)(3)] in CH(3)CN and [Al(acac)(3)] < [Be(acac)(2)] < [Al(hfa)(3)] in CO(2). The results suggest that dipolar CH(3)CN molecules interact with negatively charged oxygen atoms in the complexes, whereas nonpolar CO(2) prefers fluorinated substituents as well as quasi-aromatic rings in the ligands. Moreover, the relationship between the rotational and translational motions of tris(acetylacetonato)metal(III), [M(III)(acac)(3)], in CO(2) was investigated.
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Affiliation(s)
- Tatsuya Umecky
- National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Sendai 983-8551, Japan
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Das A, Biswas R, Chakrabarti J. Dipolar Solute Rotation in a Supercritical Polar Fluid. J Phys Chem A 2011; 115:973-8. [DOI: 10.1021/jp1086398] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amit Das
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata-700 098, India
| | - Ranjit Biswas
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata-700 098, India
| | - J. Chakrabarti
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata-700 098, India
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Skarmoutsos I, Dellis D, Samios J. The Effect of Intermolecular Interactions on Local Density Inhomogeneities and Related Dynamics in Pure Supercritical Fluids. A Comparative Molecular Dynamics Simulation Study. J Phys Chem B 2009; 113:2783-93. [DOI: 10.1021/jp809271n] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ioannis Skarmoutsos
- Department of Chemistry, Laboratory of Physical Chemistry, University of Athens, Panepistimiopolis 157-71, Athens, Greece
| | - Dimitris Dellis
- Department of Chemistry, Laboratory of Physical Chemistry, University of Athens, Panepistimiopolis 157-71, Athens, Greece
| | - Jannis Samios
- Department of Chemistry, Laboratory of Physical Chemistry, University of Athens, Panepistimiopolis 157-71, Athens, Greece
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Hou M, Zhang X, Han B, Song J, Liu G, Zhang Z, Zhang J. New topic of supercritical fluids: Local activity coefficients of supercritical solvent and cosolvent around solute. J Chem Phys 2008; 128:104510. [DOI: 10.1063/1.2838181] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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10
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Benjamin I. Solute rotational dynamics at the water liquid/vapor interface. J Chem Phys 2007; 127:204712. [DOI: 10.1063/1.2803895] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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11
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Abbott AP, Hope EG, Palmer DJ. Probing Solute Clustering in Supercritical Solutions Using Solvatochromic Parameters. J Phys Chem B 2007; 111:8119-25. [PMID: 17583934 DOI: 10.1021/jp066621h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Kamlet and Taft polarity parameters are presented for three supercritical solutions containing solutes of different polarities at two concentrations. It is shown that the polarizability and hydrogen-bond-donating ability change significantly with pressure. In the lower pressure regime, naphthalene and salicylic acid cause a decrease in the polarity parameters compared with the pure fluid, whereas toluic acid causes an increase. These differences can be explained in terms of solute-solute and solute-indicator clustering. It is shown that there is, however, a direct correlation between the change in the hydrogen-bond-donating ability and polarizability for all solutes and all pressures and concentrations, which is thought to result from changes in the amount of solvent required to solvate the solute.
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Affiliation(s)
- Andrew P Abbott
- Chemistry Department, University of Leicester, Leicester, LE1 7RH, U.K.
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12
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Lin, Gao J. Solvatochromic Shifts of the n → π* Transition of Acetone from Steam Vapor to Ambient Aqueous Solution: A Combined Configuration Interaction QM/MM Simulation Study Incorporating Solvent Polarization. J Chem Theory Comput 2007; 3:1484-93. [DOI: 10.1021/ct700058c] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Lin
- Department of Chemistry and Supercomputing Institute, Digital Technology Center, University of Minnesota, 207 Pleasant Street, SE, Minneapolis, Minnesota 55455
| | - Jiali Gao
- Department of Chemistry and Supercomputing Institute, Digital Technology Center, University of Minnesota, 207 Pleasant Street, SE, Minneapolis, Minnesota 55455
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TODD REAVES J, ROBERTS CHRISTOPHERB. SUPERCRITICAL AND SUB-CRITICAL FLUID SOLVENT EFFECTS ON A DIELS-ALDER REACTION. CHEM ENG COMMUN 2007. [DOI: 10.1080/00986449908912752] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. TODD REAVES
- a Department of Chemical Engineering , Auburn University , 230 Ross Hall Auburn University, AL, 36849
| | - CHRISTOPHER B. ROBERTS
- a Department of Chemical Engineering , Auburn University , 230 Ross Hall Auburn University, AL, 36849
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14
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Abdel-Shafi AA, Worrall DR. Photosensitized production of singlet oxygen and factors governing its decay in xenon and carbon dioxide supercritical fluids. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.08.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abbott AP, Corr S, Durling NE, Hope EG. Pressure Effects on Friedel-Crafts Alkylation Reactions in Supercritical Difluoromethane. Chemphyschem 2005; 6:466-72. [PMID: 15799471 DOI: 10.1002/cphc.200400363] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Dielectrometry is used as a novel technique for following the rate of a Friedel-Crafts alkylation reaction in supercritical (sc) difluoromethane. Although the process was not optimized, good product yields were obtained and reaction rates were found to be larger than in CO2 at comparable conditions. The reaction order is determined using the initial rate method and the reaction is shown to be first-order with respect to both anisole and t-butyl chloride. The reaction rate constant is unaffected by pressures above 120 bar but close to the critical pressure the value decreases with increasing pressure. It is also shown that the product distribution for the alkylation of anisole shows significant pressure dependence with substitution at the ortho-position being favored at lower pressures, which is ascribed to hydrogen bonding. This pressure dependency is not observed in sc CO2 or using toluene as a substrate, which supports the idea that hydrogen bonding may be important in the reaction mechanism. The effect of the different reagents and temperature on the rate of the alkylation reaction was also determined.
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Affiliation(s)
- Andrew P Abbott
- Chemistry Department, University of Leicester, Leicester LE1 7RH, UK.
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Kometani N, Hoshihara Y, Yonezawa Y, Kajimoto O, Hara K, Ito N. Rotational Dynamics of Coumarin 153 in Supercritical Fluoroform. J Phys Chem A 2004. [DOI: 10.1021/jp047854g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Noritsugu Kometani
- Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Yuji Hoshihara
- Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Yoshiro Yonezawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Okitsugu Kajimoto
- Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kimihiko Hara
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Naoki Ito
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
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18
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Photophysics of 3-hydroxyflavone in supercritical CO2: a probe to study the microenvironment of SCF. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.01.122] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Umecky T, Kanakubo M, Ikushima Y. Experimental Determination of Reorientational Correlation Time of CO2 over a Wide Range of Density and Temperature. J Phys Chem B 2003. [DOI: 10.1021/jp022604q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tatsuya Umecky
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, and Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Mitsuhiro Kanakubo
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, and Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yutaka Ikushima
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, and Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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21
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Abbott AP, Corr S, Durling NE, Hope EG. Hydrogen Bond Interactions in Liquid and Supercritical Hydrofluorocarbons. J Phys Chem B 2003. [DOI: 10.1021/jp034763v] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrew P. Abbott
- Chemistry Department, University of Leicester, Leicester, LE1 7RH United Kingdom
| | - Stuart Corr
- Chemistry Department, University of Leicester, Leicester, LE1 7RH United Kingdom
| | - Nicola E. Durling
- Chemistry Department, University of Leicester, Leicester, LE1 7RH United Kingdom
| | - Eric G. Hope
- Chemistry Department, University of Leicester, Leicester, LE1 7RH United Kingdom
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22
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Umecky T, Kanakubo M, Ikushima Y. 9Be NMR Relaxation Measurements of Bis(acetylacetonato)beryllium(II) in Liquid and Supercritical Carbon Dioxide: A Clear Evidence of Near-Critical Solvation Effect on Rotational Correlation Time. J Phys Chem B 2002. [DOI: 10.1021/jp0147271] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tatsuya Umecky
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Mitsuhiro Kanakubo
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Yutaka Ikushima
- Supercritical Fluid Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan, CREST, Japan Science and Technology Corporation (JST), Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan, Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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23
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Patel N, Biswas R, Maroncelli M. Solvation and Friction in Supercritical Fluids: Simulation−Experiment Comparisons in Diphenyl Polyene/CO2 Systems. J Phys Chem B 2002. [DOI: 10.1021/jp0206727] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- N. Patel
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - R. Biswas
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - M. Maroncelli
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
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Blatchford MA, Wallen SL. Development and validation of spectroscopic methods for monitoring density changes in pressurized gaseous and supercritical fluid systems. Anal Chem 2002; 74:1922-7. [PMID: 11985327 DOI: 10.1021/ac0111154] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The further development of new processes utilizing liquid or supercritical CO2 as a solvent will benefit from the rational design of new CO2-philes. Understanding solvation structures and mechanisms of these molecules is an important part of this process. In such studies, determining the change in density as a function of the measured thermodynamic conditions (pressure and temperature) provides an excellent means of directly monitoring the solution conditions in the detection volume for a given technique. By integrating spectroscopic peaks, changes in area can be used to determine changes in analyte concentration in the detection volume, and thus, it should be possible to monitor the system density in situ. In the present study, we examine the utility of Raman and NMR spectroscopy as a means of following changes in solution density conditions and validate this approach in pure fluids and gases (N2 and CO2) and supercritical fluid mixtures (acetaldehyde vapor in N2). In addition, we present the design of a simple, inexpensive cell for conducting Raman and NMR measurements under moderate pressure conditions.
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Affiliation(s)
- Marc A Blatchford
- Department of Chemistry, The University of North Carolina, Chapel Hill 27599-3290, USA
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Chattopadhyay N, Serpa C, Isilda Silva M, Arnaut LG, Formosinho SJ. Benzil fluorescence and phosphorescence emissions: a pertinent probe for the kinematic behaviour and microheterogeneity of supercritical CO2. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01044-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Tanko JM, Pacut R. Enhanced cage effects in supercritical fluid solvents. the behavior of diffusive and geminate caged-pairs in supercritical carbon dioxide. J Am Chem Soc 2001; 123:5703-9. [PMID: 11403602 DOI: 10.1021/ja002800f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The behavior of geminate and diffusive radical caged-pairs arising from the photolysis of dicumyl ketone in conventional and supercritical carbon dioxide (SC--CO(2)) solvents has been examined. The results suggest that locally enhanced solvent density about a solute (solvent/solute clustering) can lead to an enhanced cage effect near the critical pressure in supercritical fluid solvents. This enhanced cage effect is similar in magnitude for both diffusive and geminate caged-pairs.
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Affiliation(s)
- J M Tanko
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0212, USA
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27
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Kauffman JF. Quadrupolar Solvent Effects on Solvation and Reactivity of Solutes Dissolved in Supercritical CO2. J Phys Chem A 2001. [DOI: 10.1021/jp004359l] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- John F. Kauffman
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600
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28
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Worrall DR, Abdel-Shafi AA, Wilkinson F. Factors Affecting the Rate of Decay of the First Excited Singlet State of Molecular Oxygen O2(aΔg) in Supercritical Fluid Carbon Dioxide. J Phys Chem A 2001. [DOI: 10.1021/jp002977w] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David R. Worrall
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K
| | - Ayman A. Abdel-Shafi
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K
| | - Francis Wilkinson
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K
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29
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Jang J, Stratt RM. The short-time dynamics of molecular reorientation in liquids. I. The instantaneous generalized Langevin equation. J Chem Phys 2000. [DOI: 10.1063/1.481350] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Myers DJ, Shigeiwa M, Fayer MD, Cherayil BJ. Vibrational Lifetimes and Spectral Shifts in Supercritical Fluids as a Function of Density: Experiments and Theory. J Phys Chem B 2000. [DOI: 10.1021/jp992717i] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- D. J. Myers
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Motoyuki Shigeiwa
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - M. D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Binny J. Cherayil
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560034, India
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31
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Abbott AP, Eardley CA, Scheirer JE. Solvent Properties of Supercritical CO2/HFC134a Mixtures. J Phys Chem B 1999. [DOI: 10.1021/jp991500l] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Andrew P. Abbott
- Chemistry Department, The University of Leicester, Leicester LE1 7RH, U.K
| | | | - James E. Scheirer
- Chemistry Department, The University of Leicester, Leicester LE1 7RH, U.K
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32
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Kremer MJ, Connery KA, DiPippo MM, Feng J, Chateauneuf JE, Brennecke JF. Laser Flash Photolysis Investigation of the Triplet−Triplet Annihilation of Anthracene in Supercritical Water. J Phys Chem A 1999. [DOI: 10.1021/jp991097i] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mary J. Kremer
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Karen A. Connery
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Matthew M. DiPippo
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Junbo Feng
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - John E. Chateauneuf
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Joan F. Brennecke
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
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33
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Xu Q, Han B, Yan H. Equilibrium Constant and Enthalpy for the Hydrogen Bonding of Acetic Acid with Tetrahydrofuran in Supercritical CO2. J Phys Chem A 1999. [DOI: 10.1021/jp9900739] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Qun Xu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
| | - Buxing Han
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
| | - Haike Yan
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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34
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Lu J, Han B, Yan H. Thermodynamic studies of chemical equilibrium in supercritical carbon dioxide-cosolvent solutions using UV-Vis spectroscopy. J Supercrit Fluids 1999. [DOI: 10.1016/s0896-8446(98)00132-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Abbott AP, Eardley CA. Solvent Properties of Liquid and Supercritical Hydrofluorocarbons. J Phys Chem B 1999. [DOI: 10.1021/jp9835317] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew P. Abbott
- Chemistry Department, Leicester University, Leicester, LE1 7RH, U.K
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36
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Brennecke JF, Chateauneuf JE. Homogeneous Organic Reactions as Mechanistic Probes in Supercritical Fluids. Chem Rev 1999; 99:433-452. [PMID: 11848988 DOI: 10.1021/cr970035q] [Citation(s) in RCA: 180] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Joan F. Brennecke
- Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
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37
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Kajimoto O. Solvation in Supercritical Fluids: Its Effects on Energy Transfer and Chemical Reactions. Chem Rev 1999; 99:355-390. [PMID: 11848985 DOI: 10.1021/cr970031l] [Citation(s) in RCA: 320] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Okitsugu Kajimoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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38
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Affiliation(s)
- Susan C. Tucker
- Department of Chemistry, University of California, Davis, California 95616
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39
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Reaves JT, Roberts CB. Subcritical Solvent Effects on a Parallel Diels−Alder Reaction Network. Ind Eng Chem Res 1999. [DOI: 10.1021/ie980474v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- J. Todd Reaves
- Department of Chemical Engineering, Auburn University, 230 Ross Hall, Auburn, Alabama 36849
| | - Christopher B. Roberts
- Department of Chemical Engineering, Auburn University, 230 Ross Hall, Auburn, Alabama 36849
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40
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Abbott AP, Eardley CA. Solvent Properties of Liquid and Supercritical 1,1,1,2-Tetrafluoroethane. J Phys Chem B 1998. [DOI: 10.1021/jp980826b] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Andrew P. Abbott
- Chemistry Department, Leicester University, Leicester, LE1 7RH, United Kingdom
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41
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Watkins AN, Ingersoll CM, Baker GA, Bright FV. A parallel multiharmonic frequency-domain fluorometer for measuring excited-state decay kinetics following one-, two-, or three-photon excitation. Anal Chem 1998; 70:3384-96. [PMID: 9726164 DOI: 10.1021/ac9803481] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We report on the performance of a new, multiharmonic frequency-domain instrument that uses the high harmonic content of a passively mode-locked, pulse-picked femto-second Ti-sapphire laser as the excitation source for the determination of one-, two-, or three-photon excited time-resolved fluorescence anisotropy and intensity decay kinetics. In operation, the new instrument can provide a complete frequency-domain data set at 100 modulation frequencies in less than 1 min. The new instrument exhibits 5-10-ps measurement precision and it can rapidly and accurately recover complex excited-state fluorescence anisotropy and intensity decay kinetics under one-, two-, or three-photon excitation for dilute or optically dense samples that exhibit single or multiexponential decay kinetics. This latter aspect of the instrument is demonstrated by successfully determining the excited-state intensity decay kinetics for a dilute aqueous solution of rhodamine 6G dissolved in a high concentration of bromocresol green. This approach is extended by determining the excited-state fluorescence intensity decay kinetics of dilute fluorescein directly in undiluted, whole blood as a function of pH under two-photon excitation conditions. The high-speed capabilities of the new instrument are exploited by performing two-photon excited fluorescence anisotropy decay experiments on the fly for site-selectively labeled bovine serum albumin as it undergoes enzymatic digestion by trypsin.
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Affiliation(s)
- A N Watkins
- Department of Chemistry, Natural Sciences Complex, State University of New York at Buffalo 14260-3000, USA
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42
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Takahashi K, Sawamura S, Jonah CD. Solvent reorganization energies measured by an electron transfer reaction in supercritical ethane. J Supercrit Fluids 1998. [DOI: 10.1016/s0896-8446(98)00047-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Tucker SC, Maddox MW. The Effect of Solvent Density Inhomogeneities on Solute Dynamics in Supercritical Fluids: A Theoretical Perspective. J Phys Chem B 1998. [DOI: 10.1021/jp972382+] [Citation(s) in RCA: 146] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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deGrazia JL, Randolph TW, O'Brien JA. Rotational Relaxation in Supercritical Carbon Dioxide Revisited: A Study of Solute-Induced Local Density Augmentation. J Phys Chem A 1998. [DOI: 10.1021/jp9733734] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Janet L. deGrazia
- Department of Chemical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0424
| | - Theodore W. Randolph
- Department of Chemical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0424
| | - James A. O'Brien
- PTT, Inc., 305 Madison Avenue, Suite 1425, New York, New York 10017
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45
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Bell WC, Booksh KS, Myrick ML. Monitoring Anhydride and Acid Conversion in Supercritical/Hydrothermal Water by in Situ Fiber-Optic Raman Spectroscopy. Anal Chem 1998. [DOI: 10.1021/ac9707141] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wendy C. Bell
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
| | - Karl S. Booksh
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
| | - M. L. Myrick
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287
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46
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Niemeyer ED, Bright FV. Effects of CO2Sorption on the Rotational Reorientation Dynamics of a Model Solute Dissolved in Molten Poly(dimethylsiloxane). Macromolecules 1998. [DOI: 10.1021/ma970335+] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Zhang J, Roek DP, Chateauneuf JE, Brennecke JF. A Steady-State and Time-Resolved Fluorescence Study of Quenching Reactions of Anthracene and 1,2-Benzanthracene by Carbon Tetrabromide and Bromoethane in Supercritical Carbon Dioxide. J Am Chem Soc 1997. [DOI: 10.1021/ja964244o] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jianwei Zhang
- Contribution from the Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Daniel P. Roek
- Contribution from the Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - John E. Chateauneuf
- Contribution from the Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
| | - Joan F. Brennecke
- Contribution from the Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008
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48
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Choi M, Jin D, Kim H, Kang TJ, Jeoung SC, Kim D. Fluorescence Anisotropy of Nile Red and Oxazine 725 in an Isotropic Liquid Crystal. J Phys Chem B 1997. [DOI: 10.1021/jp971157p] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Tai Jong Kang
- Department of Chemistry, College of Natural Sciences, Taegu University, Kyungsan 712-714, Korea
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49
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Urdahl RS, Myers DJ, Rector KD, Davis PH, Cherayil BJ, Fayer MD. Vibrational lifetimes and vibrational line positions in polyatomic supercritical fluids near the critical point. J Chem Phys 1997. [DOI: 10.1063/1.474732] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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50
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Heitz MP, Maroncelli M. Rotation of Aromatic Solutes in Supercritical CO2: Are Rotation Times Anomalously Slow in the Near Critical Regime? J Phys Chem A 1997. [DOI: 10.1021/jp971096v] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. P. Heitz
- Department of Chemistry, The Pennsylvania State University, 152 Davey Lab, University Park, Pennsylvania 16802
| | - M. Maroncelli
- Department of Chemistry, The Pennsylvania State University, 152 Davey Lab, University Park, Pennsylvania 16802
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