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Bartoš J, Švajdlenková H. Thermodynamic and Dynamic Transitions and Interaction Aspects in Reorientation Dynamics of Molecular Probe in Organic Compounds: A Series of 1-alkanols with TEMPO. Int J Mol Sci 2023; 24:14252. [PMID: 37762553 PMCID: PMC10532429 DOI: 10.3390/ijms241814252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/08/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
The spectral and dynamic properties of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) in a series of 1-alkanols ranging from methanol to 1-decanol over a temperature range 100-300 K were investigated by electron spin resonance (ESR). The main characteristic ESR temperatures connected with slow to fast motion regime transition; T50G 's and TX1fast 's are situated above the corresponding glass temperatures, Tg, and for the shorter members, the T50G 's lie above or close to melting point, Tm, while the longer ones the T50G < Tm relationship indicates that the TEMPO molecules are in the local disordered regions of the crystalline media. The T50G 's and especially TX1fast 's are compared with the dynamic crossover temperatures, TXVISC = 8.72M0.66, as obtained by fitting the viscosity data in the liquid n-alkanols with the empirical power law. In particular, for NC > 6, the TX1fast 's lie rather close to the TXVISC resembling apolar n-alkanes [PCCP 2018,20,11145-11151], while for NC < 6, they are situated in the vicinity of Tm. The absence of a coincidence for lower1-alkanols indicates that the T50G is significantly influenced by the mutual interaction between the polar TEMPO and the protic polar medium due to the increased polarity and proticity destroyed by the larger-scale melting transition.
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Affiliation(s)
- Josef Bartoš
- Polymer Institute of SAS, 845 41 Bratislava, Slovakia;
| | - Helena Švajdlenková
- Polymer Institute of SAS, 845 41 Bratislava, Slovakia;
- Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava, Slovakia
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2
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Dohrn S, Rawal P, Luebbert C, Lehmkemper K, Kyeremateng SO, Degenhardt M, Sadowski G. Predicting process design spaces for spray drying amorphous solid dispersions. Int J Pharm X 2021; 3:100072. [PMID: 33855291 PMCID: PMC8027772 DOI: 10.1016/j.ijpx.2021.100072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 02/06/2021] [Indexed: 11/01/2022] Open
Abstract
Amorphous solid dispersions (ASDs) are commonly manufactured using spray-drying processes. The product quality can be decisively influenced by the choice of process parameters. Following the quality-by-design approach, the identification of the spray-drying process design space is thus an integral task in drug product development. Aiming a solvent-free and homogeneous ASD, API crystallization and amorphous phase separation needs to be avoided during drying. This publication provides a predictive approach for determining spray-drying process conditions via considering thermodynamic driving forces for solvent drying as well as ASD-specific API/polymer/solvent interactions and glass transitions. The ternary API/polymer/solvent phase behavior was calculated using the Perturbed-Chain Statistical Associating Theory (PC-SAFT) and combined with mass and energy balances to find appropriate spray-drying conditions. A process design space was identified for the ASDs of ritonavir and naproxen with either poly(vinylpyrrolidone) or poly(vinylpyrrolidone-co-vinylacetate) spray dried from the solvents acetone, dichloromethane, or ethanol.
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Affiliation(s)
- Stefanie Dohrn
- TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Pranay Rawal
- TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Christian Luebbert
- TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Kristin Lehmkemper
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Samuel O Kyeremateng
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Matthias Degenhardt
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Gabriele Sadowski
- TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
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3
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Dohrn S, Luebbert C, Lehmkemper K, Kyeremateng SO, Degenhardt M, Sadowski G. Solvent influence on the phase behavior and glass transition of Amorphous Solid Dispersions. Eur J Pharm Biopharm 2020; 158:132-142. [PMID: 33212185 DOI: 10.1016/j.ejpb.2020.11.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/06/2020] [Indexed: 11/28/2022]
Abstract
Understanding the long-term stability of amorphous solid dispersions (ASDs) is important for their successful approval for market. ASD stability does not only depend on the interplay between the active pharmaceutical ingredient (API) and the polymer in the final formulation but may already be disadvantageously influenced by process steps during the production (e.g. selection of inappropriate solvent for spray drying). Residual solvent can affect the API solubility in the polymer, molecular mobility (by influencing the glass-transition temperature) and induce liquid-liquid phase separation. Enhanced mobility in the ASD due to residual solvent can promote recrystallization in ASDs. The removal of residual solvent can be expensive, time-consuming, and usually requires secondary drying procedures to fulfil the regulatory requirements. The aim of this work is to predict the API solubility in polymer-solvent mixtures, solvent influence on the glass transition, and the occurrence of liquid-liquid phase separation of solvent-loaded ASDs using the thermodynamic model PC-SAFT and to experimentally validate these predictions. ASDs containing the APIs ritonavir or naproxen and the polymers poly(vinylpyrrolidone), poly (vinylpyrrolidone-co-vinyl acetate), or hydroxypropyl methylcellulose acetate succinate were spray-dried using the solvents acetone, ethanol, and dichloromethane. API solubility, sorption behavior, liquid-liquid phase separation and glass transition in the ternary API/polymer/solvent mixtures were predicted based on the binary phase behavior between API/solvent, API/polymer, and polymer/solvent and successfully validated experimentally using dynamic vapor sorption (DVS), and Raman spectroscopy. Thus, the presented methodology allows for an in-silico selection of appropriate solvent systems for solvent-based ASD preparation based on a limited amount of experimental data for binary systems only.
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Affiliation(s)
- Stefanie Dohrn
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Christian Luebbert
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Kristin Lehmkemper
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Samuel O Kyeremateng
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany.
| | - Matthias Degenhardt
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Gabriele Sadowski
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany.
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4
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Dohrn S, Reimer P, Luebbert C, Lehmkemper K, Kyeremateng SO, Degenhardt M, Sadowski G. Thermodynamic Modeling of Solvent-Impact on Phase Separation in Amorphous Solid Dispersions during Drying. Mol Pharm 2020; 17:2721-2733. [DOI: 10.1021/acs.molpharmaceut.0c00418] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefanie Dohrn
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Strasse 70, D-44227 Dortmund, Germany
| | - Philipp Reimer
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Strasse 70, D-44227 Dortmund, Germany
| | - Christian Luebbert
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Strasse 70, D-44227 Dortmund, Germany
| | - Kristin Lehmkemper
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Samuel O. Kyeremateng
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Matthias Degenhardt
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Gabriele Sadowski
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
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5
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Affiliation(s)
- Christian Luebbert
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Daniel Real
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Gabriele Sadowski
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
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6
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Minecka A, Kaminska E, Tarnacka M, Grudzka-Flak I, Bartoszek M, Wolnica K, Dulski M, Kaminski K, Paluch M. Impact of Intermolecular Interactions, Dimeric Structures on the Glass Forming Ability of Naproxen, and a Series of Its Derivatives. Mol Pharm 2018; 15:4764-4776. [DOI: 10.1021/acs.molpharmaceut.8b00725] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aldona Minecka
- Department of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School
of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Ewa Kaminska
- Department of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School
of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Magdalena Tarnacka
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Iwona Grudzka-Flak
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Mariola Bartoszek
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland
| | - Kamila Wolnica
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Mateusz Dulski
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Institute of Material Sciences, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - Kamil Kaminski
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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7
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Rams-Baron M, Jędrzejowska A, Dulski M, Wolnica K, Geirhos K, Lunkenheimer P, Paluch M. Unusual dielectric response of 4-methyl-1,3-dioxolane derivatives. Phys Chem Chem Phys 2018; 20:28211-28222. [DOI: 10.1039/c8cp05913f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this paper, we applied broadband dielectric spectroscopy (BDS) to investigate the molecular dynamics of three 4-methyl-1,3-dioxolane derivatives (MD) whose chemical structures differ in the length of non-polar alkyl side chains.
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Affiliation(s)
- Marzena Rams-Baron
- Institute of Physics
- University of Silesia
- 41-500 Chorzow
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - Agnieszka Jędrzejowska
- Institute of Physics
- University of Silesia
- 41-500 Chorzow
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - Mateusz Dulski
- Silesian Center for Education and Interdisciplinary Research
- 41-500 Chorzow
- Poland
- Institute of Material Science
- 41-500 Chorzow
| | - Kamila Wolnica
- Institute of Physics
- University of Silesia
- 41-500 Chorzow
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - Korbinian Geirhos
- Experimental Physics V
- Center for Electronic Correlations and Magnetism
- University of Augsburg
- 86159 Augsburg
- Germany
| | - Peter Lunkenheimer
- Experimental Physics V
- Center for Electronic Correlations and Magnetism
- University of Augsburg
- 86159 Augsburg
- Germany
| | - Marian Paluch
- Institute of Physics
- University of Silesia
- 41-500 Chorzow
- Poland
- Silesian Center for Education and Interdisciplinary Research
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8
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Ransom TC, Oliver WF. Glass Transition Temperature and Density Scaling in Cumene at Very High Pressure. PHYSICAL REVIEW LETTERS 2017; 119:025702. [PMID: 28753339 DOI: 10.1103/physrevlett.119.025702] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Indexed: 06/07/2023]
Abstract
We present a new method that allows direct measurements of the glass transition temperature T_{g} at pressures up to 4.55 GPa in the glass-forming liquid cumene (isopropylbenzene). This new method uses a diamond anvil cell and can measure T_{g} at pressures of 10 GPa or greater. Measuring T_{g} at the glass→liquid transition involves monitoring the disappearance of pressure gradients initially present in the glass, but also takes advantage of the large increase in the volume expansion coefficient α_{p} at T_{g} as the supercooled or superpressed liquid is entered. Accurate T_{g}(P) values in cumene allow us to show that density scaling holds along this isochronous line up to pressures much higher than any previous study, corresponding to a density increase of 29%. Our results for cumene over this huge compression range yield ρ^{γ}/T=C, where C is a constant and where γ=4.77±0.02 for this nonassociated glass-forming system. Finally, high-pressure cumene viscosity data from the literature taken at much lower pressures and at several different temperatures, corresponding to a large dynamic range of nearly 13 orders of magnitude, are shown to superimpose on a plot of η vs ρ^{γ}/T for the same value of γ.
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Affiliation(s)
- T C Ransom
- Naval Research Laboratory, Chemistry Division, Code 6100, Washington DC 20375-5342, USA
- Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - W F Oliver
- Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA
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9
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Johari GP, Andersson O. Structural relaxation and thermal conductivity of high-pressure formed, high-density di-n-butyl phthalate glass and pressure induced departures from equilibrium state. J Chem Phys 2017. [PMID: 28641442 DOI: 10.1063/1.4986063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We report a study of structural relaxation of high-density glasses of di-n-butyl phthalate (DBP) by measuring thermal conductivity, κ, under conditions of pressure and temperature (p,T) designed to modify both the vibrational and configurational states of a glass. Various high-density glassy states of DBP were formed by (i) cooling the liquid under a fixed high p and partially depressurizing the glass, (ii) isothermal annealing of the depressurized glass, and (iii) pressurizing the glass formed by cooling the liquid under low p. At a given low p, κ of the glass formed by cooling under high p is higher than that of the glass formed by cooling under low p, and the difference increases as glass formation p is increased. κ of the glass formed under 1 GPa is ∼20% higher at ambient p than κ of the glass formed at ambient p. On heating at low p, κ decreases until the glass to liquid transition range is reached. This is the opposite of the increase in κ observed when a glass formed under a certain p is heated under the same p. At a given high p, κ of the low-density glass formed by cooling at low p is lower than that of the high-density glass formed by cooling at that high p. On heating at high p, κ increases until the glass to liquid transition range is reached. The effects observed are due to a thermally assisted approach toward equilibrium at p different from the glass formation p. In all cases, the density, enthalpy, and entropy would change until the glasses become metastable liquids at a fixed p, thus qualitatively relating κ to variation in these properties.
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Affiliation(s)
- G P Johari
- Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
| | - Ove Andersson
- Department of Physics, Umeå University, 901 87 Umeå, Sweden
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10
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Tylinski M, Beasley MS, Chua YZ, Schick C, Ediger MD. Limited surface mobility inhibits stable glass formation for 2-ethyl-1-hexanol. J Chem Phys 2017; 146:203317. [DOI: 10.1063/1.4977787] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. Tylinski
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - M. S. Beasley
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Y. Z. Chua
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany and Competence Centre CALOR, Faculty of Interdisciplinary Research, University of Rostock, Albert-Einstein-Str. 25, 18051 Rostock, Germany
| | - C. Schick
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany and Competence Centre CALOR, Faculty of Interdisciplinary Research, University of Rostock, Albert-Einstein-Str. 25, 18051 Rostock, Germany
| | - M. D. Ediger
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
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Jedrzejowska A, Wojnarowska Z, Adrjanowicz K, Ngai KL, Paluch M. Toward a better understanding of dielectric responses of van der Waals liquids: The role of chemical structures. J Chem Phys 2017. [DOI: 10.1063/1.4977736] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Agnieszka Jedrzejowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Zaneta Wojnarowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Karolina Adrjanowicz
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - K. L. Ngai
- CNR-IPCF, Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
| | - Marian Paluch
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
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12
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Tylinski M, Chua YZ, Beasley MS, Schick C, Ediger MD. Vapor-deposited alcohol glasses reveal a wide range of kinetic stability. J Chem Phys 2016; 145:174506. [DOI: 10.1063/1.4966582] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- M. Tylinski
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Y. Z. Chua
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany and Competence Centre CALOR, Faculty of Interdisciplinary Research, University of Rostock, Albert-Einstein-Str. 25, 18051 Rostock, Germany
| | - M. S. Beasley
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - C. Schick
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany and Competence Centre CALOR, Faculty of Interdisciplinary Research, University of Rostock, Albert-Einstein-Str. 25, 18051 Rostock, Germany
| | - M. D. Ediger
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
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13
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Ishii K, Nakayama H. Structural relaxation of vapor-deposited molecular glasses and supercooled liquids. Phys Chem Chem Phys 2014; 16:12073-92. [DOI: 10.1039/c4cp00458b] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The properties of vapor-deposited molecular glasses largely depend on deposition conditions, and stable and/or dense glasses are formed with several compounds.
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Affiliation(s)
- Kikujiro Ishii
- Department of Chemistry
- Gakushuin University
- Tokyo 171-8588, Japan
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14
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Nakayama H, Omori K, Ino-u-e K, Ishii K. Molar Volumes of Ethylcyclohexane and Butyronitrile Glasses Resulting from Vapor Deposition: Dependence on Deposition Temperature and Comparison to Alkylbenzenes. J Phys Chem B 2013; 117:10311-9. [DOI: 10.1021/jp404256r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Hideyuki Nakayama
- Department
of Chemistry, Gakushuin University, 1-5-1
Mejiro, Toshimaku, Tokyo 171-8588, Japan
| | - Kio Omori
- Department
of Chemistry, Gakushuin University, 1-5-1
Mejiro, Toshimaku, Tokyo 171-8588, Japan
| | - Katsunobu Ino-u-e
- Department
of Chemistry, Gakushuin University, 1-5-1
Mejiro, Toshimaku, Tokyo 171-8588, Japan
| | - Kikujiro Ishii
- Department
of Chemistry, Gakushuin University, 1-5-1
Mejiro, Toshimaku, Tokyo 171-8588, Japan
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15
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Preiss UP, Saleh MI. An Augmented Volume-Based Model of the Glass Transition Temperature of 209 Molecular Liquids. J Pharm Sci 2013; 102:1970-1980. [DOI: 10.1002/jps.23553] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 03/14/2013] [Accepted: 03/26/2013] [Indexed: 11/08/2022]
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16
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Kusukawa T, Niwa G, Sasaki T, Oosawa R, Himeno W, Kato M. Observation of a Hydrogen-Bonded 3D Structure of Crystalline Glycerol. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20120300] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takahiro Kusukawa
- Department of Chemistry and Materials Technology, Graduate School of Engineering, Kyoto Institute of Technology
| | - Genki Niwa
- Kyoto Prefectural Momoyama Senior High School
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17
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Chen Z, Richert R. Dynamics of glass-forming liquids. XV. Dynamical features of molecular liquids that form ultra-stable glasses by vapor deposition. J Chem Phys 2011; 135:124515. [DOI: 10.1063/1.3643332] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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18
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Wang YZ, Li Y, Zhang JX. Scaling of the hysteresis in the glass transition of glycerol with the temperature scanning rate. J Chem Phys 2011; 134:114510. [PMID: 21428635 DOI: 10.1063/1.3564919] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
By measuring the dependences of the temperature-dependent primary ("alpha") dielectric relaxation time behavior on the temperature scanning rate for the glass-forming glycerol, we study the scaling of hysteresis at the glass transition in glycerol. Based on the Vogel-Fulcher-Tammann (VFT) expression and the Angell's fragility concept, notable correlations of the systematic kinetic fragility, and of the hysteresis effect in the vitrification∕fusion "alpha"-relaxation process of glycerol, with the temperature scanning rate, were reasonably analyzed and discussed. It was observed that the kinetic fragility m and the apparent glass-transition temperature hysteresis width ΔT(g)(a), respectively, scaled the temperature scanning rate q as m ≈ α(m)q(-γ) and ΔT(g)(a) ≈ A(0) + αq(β), at which the exponents, γ and β, were suggested to be characteristic of the resistance to the structure change or fragility change of the system during the glass transition. The observed scaling laws are quite similar to the scaling power law for the thermal hysteresis in the first-order phase transition (FOPT) of solids, providing a significant insight into the hysteresis effect in the glass transition of the glass-forming liquids.
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Affiliation(s)
- Yi-Zhen Wang
- State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics and Engineering, Sun Yat-sen University (Zhongshan), Guangzhou, 510275, China
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Koop T, Bookhold J, Shiraiwa M, Pöschl U. Glass transition and phase state of organic compounds: dependency on molecular properties and implications for secondary organic aerosols in the atmosphere. Phys Chem Chem Phys 2011; 13:19238-55. [DOI: 10.1039/c1cp22617g] [Citation(s) in RCA: 503] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Rössler E. Corresponding States Concept for Simple Supercooled Liquids Identifying a Change of Diffusion Mechanism above the Glass Transition Temperature. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19900940338] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Barthel J, Gores HJ, Carlier P, Feuerlein F, Utz M. The Temperature Dependence of the Properties of Electrolyte Solutions. V. Determination of the Glass Transition Temperature and Comparison of the Temperature Coefficients of Electrolyte Conductance and Solvent Viscosity of Propylene Carbonate Solutions. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19830870516] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Ishii K, Nakayama H, Moriyama R, Yokoyama Y. Behavior of Glass and Supercooled Liquid Alkylbenzenes Vapor-Deposited on Cold Substrates: Toward the Understanding of the Curious Light Scattering Observed in Some Supercooled Liquid States. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.1240] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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23
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Mandanici A, Huang W, Cutroni M, Richert R. Dynamics of glass-forming liquids. XII. Dielectric study of primary and secondary relaxations in ethylcyclohexane. J Chem Phys 2008; 128:124505. [PMID: 18376941 DOI: 10.1063/1.2844797] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dynamics of ethylcyclohexane are investigated by high resolution dielectric spectroscopy aiming to characterize the relevant relaxational features of this simple system in its fluid, supercooled liquid, and glassy states. The dielectric signature of structural relaxation is a primary loss peak with amplitude Deltaepsilon=0.01, and a secondary loss process is found in the glassy state. This beta relaxation is compared with a "slow" process revealed by ultrasonics and with previously found gamma and chi processes in similar materials containing the cyclohexyl group. The results suggest that this secondary process is an intramolecular mode rather than a Johari-Goldstein process, consistent with its persistence in the liquid state at slow relaxation times which exceed those of the alpha process. The dielectric activity of such a slow process requires that the dipole magnitude changes with the intramolecular transition, whereas a change in dipole direction only would be masked by the faster structural relaxation.
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Affiliation(s)
- Andrea Mandanici
- Dipartimento di Fisica, Università di Messina, 98100 Messina, Italy
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24
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Wang LM, Tian Y, Liu R, Richert R. Calorimetric versus kinetic glass transitions in viscous monohydroxy alcohols. J Chem Phys 2008; 128:084503. [DOI: 10.1063/1.2840357] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Mandanici A, Cutroni M. Multiple Mechanical Relaxations in Ethylcyclohexane above the Glass Transition Temperature. J Phys Chem B 2007; 111:10999-1003. [PMID: 17715956 DOI: 10.1021/jp071202l] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanical response of ethylcyclohexane has been investigated at ultrasonic frequencies in a large temperature range from 300 K down to the glass transition region. The results indicate the existence of a secondary relaxation not yet reported for this system. The comparison with literature data leads to a rather complex dynamic behavior. In fact, this molecular liquid exhibits three different mechanical relaxations above the glass transition temperature: a main structural process and two additional processes, both having a possible intramolecular origin.
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Affiliation(s)
- Andrea Mandanici
- Dipartimento di Fisica, Università di Messina, Salita Sperone 31, 98100 Messina, Italy.
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26
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Elsaesser MS, Kohl I, Mayer E, Loerting T. Novel Method to Detect the Volumetric Glass → Liquid Transition at High Pressures: Glycerol as a Test Case. J Phys Chem B 2007; 111:8038-44. [PMID: 17595130 DOI: 10.1021/jp0708897] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a novel method of detecting the glass --> liquid transition at high pressures, which comprises measuring the relative volume change incurred upon heating glassy samples into the liquid state. We show data on glycerol in the pressure range 0.050-1.00 GPa to demonstrate the viability of the method. The reversible glass --> liquid transition is observed by means of a kink in the relative volume change on heating the sample isobarically, which is attributed to the glass --> liquid transition temperature Tg. This kink can only be observed in the second and subsequent heating cycles since it is superposed by a compaction in the first heating cycle. The isobaric thermal expansivity beta, which is closely related to the first derivative of this curve, shows the features expected for a glass --> liquid transition, including a sharp rise of beta(glass) in a narrow temperature interval to beta(viscous liquid) and an accompanying overshoot effect. Both Tg and the size of the overshoot effect vary in accordance with theory upon changing the ratio of cooling to heating rates. From the shape of this curve the onset, inflection, overshoot peak, and endpoint of the glass --> liquid transition can be extracted, which can be employed to calculate the reduced glass transition width as a measure for the fragility of the liquid. Comparison with literature data allows quantifying the accuracy of the liquid's thermal expansivity beta to be at least +/-10%, while the error in beta is significantly larger for the expansivity of the glassy state. The reproducibility of the glass --> liquid transition temperature Tg is better than +/-2 K. Our glycerol data confirms literature studies showing a nonlinear increase of Tg with increasing pressure (approximately 35 K/GPa on average), which is accompanied by an increase in fragility.
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Affiliation(s)
- Michael S Elsaesser
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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27
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Grest GS, Cohen MH. Liquids, Glasses, and the Glass Transition: A Free-Volume Approach. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470142684.ch6] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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28
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Wang LM, Richert R. Glass Transition Dynamics and Boiling Temperatures of Molecular Liquids and Their Isomers. J Phys Chem B 2007; 111:3201-7. [PMID: 17388430 DOI: 10.1021/jp0688254] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relation between a dynamic and a thermodynamic temperature, glass transition Tg and boiling point Tb, is investigated for various glass-forming liquids, with emphasis on monohydroxy alcohols. As is well known, Tb and Tg are positively correlated across a large variety of liquids. However, we found that the same quantities show a negative correlation within an isomeric series, i.e., Tb decreases with increasing Tg for different isomers of the same chemical formula. For the alcohol series, CnH2n+1OH with 3 < or = n < or = 10, a master curve of the negative Tg - Tb correlation is obtained if the temperatures are normalized to the respective values of the n-alkanols. This Tg - Tb dependence of isomeric liquids is linked to entropic effects and responsible for much of the scatter of the correlation observed for a large number of molecular organic glass-formers with 45 < Tg < 250 K. Dielectric relaxation is measured for three groups of isomers: (a) 3-methoxyl-1-butanol and 2-iso-propoxyethanol, (b) 1,4-, 1,2-, and 2,4-pentanediol, and (c) di-n- and di-iso-butyl phthalate. Two key parameters of the dynamics, fragility m and stretching exponent beta, are found to be indistinguishable within isomers of moderately different Tgs. Larger fragility differences are readily expected with pronounced structural change, but no systematic trend is observed within an isomer series. The results provide a useful tool for assessing Tg, m, and beta for marginal glass formers on the basis of their isomers.
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Affiliation(s)
- Li-Min Wang
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, USA
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Anopchenko A, Psurek T, VanderHart D, Douglas JF, Obrzut J. Dielectric study of the antiplasticization of trehalose by glycerol. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2006; 74:031501. [PMID: 17025634 DOI: 10.1103/physreve.74.031501] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2006] [Revised: 04/08/2006] [Indexed: 05/12/2023]
Abstract
Recent measurements have suggested that the antiplasticizing effect of glycerol on trehalose can significantly increase the preservation times of proteins stored in this type of preservative formulation. In order to better understand the physical origin of this phenomenon, we examine the nature of antiplasticization in trehalose-glycerol mixtures by dielectric spectroscopy. These measurements cover a broad frequency range between 40 Hz to 18 GHz (covering the secondary relaxation range of the fragile glass-former trehalose and the primary relaxation range of the strong glass-former glycerol) and a temperature (T) range bracketing room temperature (220 K to 350 K). The Havriliak-Negami function precisely fits our relaxation data and allows us to determine the temperature and composition dependence of the relaxation time tau describing a relative fast dielectric relaxation process appropriate to the characterization of antiplasticization. We observe that increasing the glycerol concentration at fixed T increases tau (i.e., the extent of antiplasticization) until a temperature dependent critical "plasticization concentration" xwp is reached. At a fixed concentration, we find a temperature at which antiplasticization first occurs upon cooling and we designate this as the "antiplasticization temperature," Tant. The ratio of the tau values for the mixture and pure trehalose is found to provide a useful measure of the extent of antiplasticization, and we explore other potential measures of antiplasticization relating to the dielectric strength.
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Affiliation(s)
- A Anopchenko
- Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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30
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Champeney D, Kaddour FO. Ionic mobility and dielectric relaxation in supercooled liquid KCl-glycerol solutions. Mol Phys 2006. [DOI: 10.1080/00268978400101371] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Wang LM, Shahriari S, Richert R. Diluent Effects on the Debye-Type Dielectric Relaxation in Viscous Monohydroxy Alcohols. J Phys Chem B 2005; 109:23255-62. [PMID: 16375290 DOI: 10.1021/jp054542k] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
With the recognition that the Debye-type dielectric relaxation of liquid monohydroxy alcohols does not reflect the structural relaxation dynamics associated with the viscous flow and the glass transition, its behavior upon dilution is expected to differ from that of real alpha-processes. We have investigated the Debye-type dielectric relaxation of binary alcohol/alkane mixtures across the entire concentration range in the supercooled regimes. The focus is on 2-ethyl-1-hexanol in two nonpolar liquids, 3-methylpentane and squalane, which are more fluid and more viscous than the alcohol, respectively. The Debye relaxation is found to occur only for alcohol mole fractions x > 0.2 and is always accompanied by a non-Debye relaxation originating from the alcohol component. Prior to its complete disappearance, the Debye relaxation is subject to broadening. We observe that the Debye dynamics of 2-ethyl-1-hexanol is accelerated in the more fluid 3-methylpentane, while the more viscous squalane leads to longer Debye relaxation times. The present experiments also provide evidence that the breakdown of the Debye relaxation amplitude does not imply the absence of hydrogen-bonded structures.
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Affiliation(s)
- Li-Min Wang
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA
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32
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Di Noto V, Vittadello M, Greenbaum SG, Suarez S, Kano K, Furukawa T. A New Class of Lithium Hybrid Gel Electrolyte Systems. J Phys Chem B 2004. [DOI: 10.1021/jp047413x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. Di Noto
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - M. Vittadello
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - S. G. Greenbaum
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - S. Suarez
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - K. Kano
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - T. Furukawa
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy, Physics Department, Hunter College of CUNY, 695 Park Avenue, New York, New York 10021, and Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kakurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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Sekula M, Pawlus S, Hensel-Bielowka S, Ziolo J, Paluch M, Roland CM. Structural and Secondary Relaxations in Supercooled Di-n-butyl Phthalate and Diisobutyl Phthalate at Elevated Pressure. J Phys Chem B 2004. [DOI: 10.1021/jp0376121] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Sekula
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
| | - S. Pawlus
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
| | - S. Hensel-Bielowka
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
| | - J. Ziolo
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
| | - M. Paluch
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
| | - C. M. Roland
- Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland, and Naval Research Laboratory, Chemistry Division, Code 6120, Washington, D.C. 20375-5342
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Follenius-Wund A, Bourotte M, Schmitt M, Iyice F, Lami H, Bourguignon JJ, Haiech J, Pigault C. Fluorescent derivatives of the GFP chromophore give a new insight into the GFP fluorescence process. Biophys J 2003; 85:1839-50. [PMID: 12944297 PMCID: PMC1303356 DOI: 10.1016/s0006-3495(03)74612-8] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The photophysical properties of synthetic compounds derived from the imidazolidinone chromophore of the green fluorescent protein were determined. Various electron-withdrawing or electron-donating substituents were introduced to mimic the effect of the chromophore surroundings in the protein. The absorption and emission spectra as well as the fluorescence quantum yields in dioxane and glycerol were shown to be highly dependent on the electronic properties of the substituents. We propose a kinetic scheme that takes into account the temperature-dependent twisting of the excited molecule. If the activation energy is low, the molecule most often undergoes an excited-state intramolecular twisting that leads it to the ground state through an avoided crossing between the S(1) and S(0) energy surfaces. For a high activation energy, the torsional motion within the compounds is limited and the ground-state recovery will occur preferentially by fluorescence emission. The excellent correlation between the fluorescence quantum yields and the calculated activation energies to torsion points to the above-mentioned avoided crossing as the main nonradiative deactivation channel in these compounds. Finally, our results are discussed with regard to the chromophore in green fluorescent protein and some of its mutants.
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Affiliation(s)
- Anny Follenius-Wund
- UMR CNRS 7034-Pharmacologie et Physico-Chimie des Interactions Cellulaires et Moléculaires, Université Louis Pasteur Strasbourg I, Faculté de Pharmacie, BP 24, 67401 Illkirch-Cedex, France
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Zhang SH, Jin X, Painter PC, Runt J. Dynamic Homogeneity in Mixtures of Poly(vinyl methyl ether) with Low Molecular Weight Phenolic Molecules. Macromolecules 2003. [DOI: 10.1021/ma034738n] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. H. Zhang
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - X. Jin
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - P. C. Painter
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - J. Runt
- Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
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36
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Okay O, Balkaş TI. Heterogeneous styrene-divinylbenzene copolymers in collapsed and reexpanded states. J Appl Polym Sci 2003. [DOI: 10.1002/app.1986.070310623] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Goes M, de Groot M, Koeberg M, Verhoeven JW, Lokan NR, Shephard MJ, Paddon-Row MN. Temperature Dependence of Charge-Transfer Fluorescence from Extended and U-shaped Donor−Bridge−Acceptor Systems in Glass-Forming Solvents. J Phys Chem A 2001. [DOI: 10.1021/jp012507h] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Marijn Goes
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Mattijs de Groot
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Mattijs Koeberg
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Jan W. Verhoeven
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Nigel R. Lokan
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Michael J. Shephard
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
| | - Michael N. Paddon-Row
- Laboratory of Organic Chemistry, IMC, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands, and School of Chemistry, University of New South Wales, Sydney 2052, Australia
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Champeney DC, Sedgwick DF. Investigation of molecular motion in some organic glasses and supercooled liquids by Mossbauer scattering. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/5/14/015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Lazonder K, Duppen K, Wiersma DA. Ethanol Glass Dynamics: Logarithmic Line Broadening and Optically Induced Dephasing. J Phys Chem B 2000. [DOI: 10.1021/jp000566+] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Alba-Simionesco C, Fan J, Angell CA. Thermodynamic aspects of the glass transition phenomenon. II. Molecular liquids with variable interactions. J Chem Phys 1999. [DOI: 10.1063/1.478800] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Glowinkowski S, Jurga S, Suchanski W, Szczesniak E. Local and global dynamics in the glass-forming di-isobutyl phthalate as studied by 1H NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 1997; 7:313-317. [PMID: 9176936 DOI: 10.1016/s0926-2040(96)01266-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Spin-lattice relaxation times T1 and T1p as well as 1H NMR spectra have been employed to study the dynamics of the glass-forming di-isobutyl phthalate in the temperature range extending from 100 K, through the glass transition temperature Tg, up to 340 K. Below Tg NMR relaxation is governed by local dynamics and may be attributed to rotation of methyl groups at low temperatures and to motion of isobutyl groups in the intermediate temperature interval. Above Tg the main relaxation mechanism is provided by overall molecular motion. The observed relaxation behavior is explained by motional models assuming asymmetrical distributions of correlation times. The motional parameters obtained from Davidson-Cole distribution, which yields the best fit of the data at all temperatures are given.
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Affiliation(s)
- S Glowinkowski
- Institute of Physics A. Mickiewicz University, Poznan, Poland
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43
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Hage W, Hallbrucker A, Mayer E. Metastable intermediates from glassy solutions. Part 3.—FTIR spectra of α-carbonic acid and its2H and13C isotopic forms, isolated from methanolic solution. ACTA ACUST UNITED AC 1996. [DOI: 10.1039/ft9969203183] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Grubbs WT, MacPhail RA. Dynamics in supercooled glycerol by high resolution stimulated Brillouin gain spectroscopy. J Chem Phys 1994. [DOI: 10.1063/1.466503] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Okay O. Kinetic modelling of network formation and properties in free-radical crosslinking copolymerization. POLYMER 1994. [DOI: 10.1016/0032-3861(94)90879-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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