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Pelosi C, Quaranta A, Rollo M, Martinelli E, Duce C, Ciancaleoni G, Bernazzani L. Preparation and Characterization of Zinc(II)-Based Lewis/Brønsted Acidic Deep Eutectic Solvents. Molecules 2023; 28:8054. [PMID: 38138544 PMCID: PMC10745514 DOI: 10.3390/molecules28248054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Lewis/Brønsted acidic deep eutectic solvents (LBDESs) are a recent class of solvents that combine the two types of acidity. In some cases, this synergy leads to enhanced catalytic properties for many reactions and applications. For this reason, it is important to discover more LBDESs. In this work, we prepared and characterized four different zinc(II)-based LBDESs, mixing ZnCl2 and various Brønsted acids: acetic, glycolic, levulinic, and formic acids. Apart from the latter, for which the corresponding DES is not thermally stable, the samples have been characterized in terms of density, viscosity, and conductivity. Notably, as zinc(II) is a diamagnetic metal, all of them are suitable for NMR spectroscopy, for example, for kinetic and mechanistic studies.
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Affiliation(s)
- Chiara Pelosi
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
| | - Aldo Quaranta
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
| | - Marco Rollo
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
| | - Elisa Martinelli
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
| | - Celia Duce
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
- Istituto Nazionale di Ottica (INO-CNR) Area di Pisa, Centro Nazionale delle Ricerche, Via Moruzzi, 56124 Pisa, Italy
| | - Gianluca Ciancaleoni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
| | - Luca Bernazzani
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; (C.P.); (A.Q.); (M.R.); (E.M.); (C.D.)
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2
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Ushiki I, Miyajima A, Fujimitsu R, Takishima S. Modeling cobalt (III) acetylacetonate and iron (III) acetylacetonate solubilities in supercritical CO2 with PC-SAFT based on experimentally-determined solid–liquid equilibria in organic solvents. J Supercrit Fluids 2023. [DOI: 10.1016/j.supflu.2023.105882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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3
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Kufner AC, Krummnow A, Danzer A, Wohlgemuth K. Strategy for Fast Decision on Material System Suitability for Continuous Crystallization Inside a Slug Flow Crystallizer. MICROMACHINES 2022; 13:1795. [PMID: 36296148 PMCID: PMC9610778 DOI: 10.3390/mi13101795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
There is an increasing focus on two-phase flow in micro- or mini-structured apparatuses for various manufacturing and measurement instrumentation applications, including the field of crystallization as a separation technique. The slug flow pattern offers salient features for producing high-quality products, since narrow residence time distribution of liquid and solid phases, intensified mixing and heat exchange, and an enhanced particle suspension are achieved despite laminar flow conditions. Due to its unique features, the slug flow crystallizer (SFC) represents a promising concept for small-scale continuous crystallization achieving high-quality active pharmaceutical ingredients (API). Therefore, a time-efficient strategy is presented in this study to enable crystallization of a desired solid product in the SFC as quickly as possible and without much experimental effort. This strategy includes pre-selection of the solvent/solvent mixture using heuristics, verifying the slug flow stability in the apparatus by considering the static contact angle and dynamic flow behavior, and modeling the temperature-dependent solubility in the supposed material system using perturbed-chain statistical associating fluid theory (PC-SAFT). This strategy was successfully verified for the amino acids l-alanine and l-arginine and the API paracetamol for binary and ternary systems and, thus, represents a general approach for using different material systems in the SFC.
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Affiliation(s)
- Anne Cathrine Kufner
- Department of Biochemical and Chemical Engineering, Laboratory of Plant and Process Design, TU Dortmund University, D-44227 Dortmund, Germany
| | - Adrian Krummnow
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, D-44227 Dortmund, Germany
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Andreas Danzer
- Department of Biochemical and Chemical Engineering, Laboratory of Thermodynamics, TU Dortmund University, D-44227 Dortmund, Germany
| | - Kerstin Wohlgemuth
- Department of Biochemical and Chemical Engineering, Laboratory of Plant and Process Design, TU Dortmund University, D-44227 Dortmund, Germany
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4
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Manson A, Sefcik J, Lue L. Temperature Dependence of Solubility Predicted from Thermodynamic Data Measured at a Single Temperature: Application to α, β, and γ-Glycine. CRYSTAL GROWTH & DESIGN 2022; 22:1691-1706. [PMID: 35431659 PMCID: PMC9008547 DOI: 10.1021/acs.cgd.1c01217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/25/2022] [Indexed: 05/17/2023]
Abstract
Understanding of solid-liquid equilibria for polymorphic systems is crucial for rational design and efficient operation of crystallization processes. In this work, we present a framework to determine the temperature dependent solubility based on experimentally accessible thermodynamic data measured at a single temperature. Using this approach, we investigate aqueous solubility of α, β, and γ-glycine, which, despite numerous studies, have considerable quantitative uncertainty, in particular for the most stable (γ) and the least stable (β) solid forms. We benchmark our framework on α-glycine giving predictions in excellent agreement with direct solubility measurements between 273-340 K, using only thermodynamic data measured at the reference temperature (298.15 K). We analyze the sensitivity of solubility predictions with respect to underlying measurement uncertainty, as well as the excess Gibbs free energy models used to derive required thermodynamic quantities before providing solubility predictions for β and γ-glycine between 273-310 and 273-330 K, respectively. Crucially, this approach to predict solubility as a function of temperature does not rely on measurement of solute melting properties which will be particularly useful for compounds that undergo thermal decomposition or polymorph transition prior to melting.
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Affiliation(s)
- Andrew Manson
- Department
of Chemical and Process Engineering, University
of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
| | - Jan Sefcik
- Department
of Chemical and Process Engineering, University
of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
- EPSRC
Continuous Manufacturing & Advanced Crystallisation (CMAC) Future
Manufacturing Research Hub, University of
Strathclyde, Glasgow G1 1RD, U.K.
| | - Leo Lue
- Department
of Chemical and Process Engineering, University
of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K.
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5
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The melting properties of D-α-glucose, D-β-fructose, D-sucrose, D-α-galactose, and D-α-xylose and their solubility in water: A revision. FOOD BIOPHYS 2021. [DOI: 10.1007/s11483-021-09707-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Abstract
Saccharides are still commonly isolated from biological feedstock by crystallization from aqueous solutions. Precise thermodynamic data on solubility are essential to optimize the downstream crystallization process. Solubility modeling, in turn, requires knowledge of melting properties. In the first part of this work, following our previous work on amino acids and peptides, D-α-glucose, D-β-fructose, D-sucrose, D-α-galactose, and D-α-xylose were investigated with Fast Scanning Calorimetry (FSC) in a wide scanning rate range (2000 K·s−1 to 10000 K·s−1). Using the experimental melting properties of saccharides from FSC allowed successfully modeling aqueous solubility for D-sucrose and D-α-galactose with the equation of state PC-SAFT. This provides cross-validation of the measurement methods to determine accurate experimental melting properties with FSC. Unexpectedly, the experimental FSC melting temperatures, extrapolated to zero scanning rates for thermal lag correction, were higher than results determined with DSC and available literature data. To clarify this inconsistency, FSC measurements towards low scanning rates from 10000 K·s−1 to 1 K·s−1 (D-α-glucose, D-β-fructose, D-sucrose) overlapping with the scanning rates of DSC and literature data were combined. At scanning rates below 1000 K·s−1, the melting properties followed a consistent non-linear trend, observed in both the FSC and the literature data. In order to understand the non-linear decrease of apparent melting temperatures with decreasing heating rate, the endothermic peaks were investigated in terms of isoconversional kinetics. The activation energies in the non-linear dependency region are in the range of $$300<{E}_{A}< 600 {\text{kJ}}\bullet {\text{mo}}{\text{l}}^{-1}$$
300
<
E
A
<
600
kJ
∙
mol
-
1
. These values are higher than the enthalpy of sublimation for D-α-glucose, indicating that the non-linear behavior does not have a physical nature but attributes to chemical processes corresponding to the decomposition of molecular compounds within the crystal lattice before melting. The melting properties reported in the literature, commonly determined with conventional methods such as DSC, lead to inaccurate results due to the decomposition of these biomolecules at low heating rates. In addition, the FSC results at lower scanning rates coincide with results from DSC and literature in the overlapping scanning rate range, further validating the accuracy of FSC measurements to determine reliable melting properties of thermally labile biomolecules. The experimental FSC melting properties determined at higher scanning rates are considered as the correct equilibrium melting properties, which are not influenced by any chemical processes. The combination of FSC and PC-SAFT opens the door to model solubility of solid compounds that commonly decompose before melting.
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Bongioanni A, Bueno MS, Mezzano BA, Longhi MR, Garnero C. Amino acids and its pharmaceutical applications: A mini review. Int J Pharm 2021; 613:121375. [PMID: 34906648 DOI: 10.1016/j.ijpharm.2021.121375] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 12/03/2021] [Accepted: 12/08/2021] [Indexed: 11/30/2022]
Abstract
Amino acids are natural compounds that can be safely used in pharmaceutical applications. Considering the great interest in the amino acids used in the pharmaceutical industry, this article presents an overview of investigations reported in recent years. In this regard, the first sections begin with an introductory description of the properties, classification and safety of amino acids, while in the other sections the most common methods for the preparation of amino acids formulations and their application on solubilization, permeation and stabilization of several active pharmaceutical ingredients are described. Furthermore, available data about the multicomponent systems approach is included. Lastly, the impact of amino acids formulations on therapeutic efficacy is explored. The advantages illustrated suggest that amino acids are capable of improving the biopharmaceutical properties of drugs.
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Affiliation(s)
- Agustina Bongioanni
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA-CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Cordoba X5000HUA, Argentina.
| | - Maria Soledad Bueno
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA-CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Cordoba X5000HUA, Argentina.
| | - Belén Alejandra Mezzano
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA-CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Cordoba X5000HUA, Argentina.
| | - Marcela Raquel Longhi
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA-CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Cordoba X5000HUA, Argentina.
| | - Claudia Garnero
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA-CONICET, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Cordoba X5000HUA, Argentina.
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7
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Impact of deep eutectic solvents and their constituents on the aqueous solubility of phloroglucinol dihydrate. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117932] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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Solvent and temperature effects on the solubility of some new adamantane/memantine sulfonamide derivatives. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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10
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Do HT, Franke P, Volpert S, Klinksiek M, Thome M, Held C. Measurement and modelling solubility of amino acids and peptides in aqueous 2-propanol solutions. Phys Chem Chem Phys 2021; 23:10852-10863. [PMID: 33908485 DOI: 10.1039/d1cp00005e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Amino acids and peptides are essential components in the biochemical industry. The final products are employed in a wide range of applications and are often synthesized by fermentation and purified in a complex downstream process. One possible separation step is using an additional solvent to lower the solubility of the desired product and, thus, promote the crystallization of the particular component. Therefore, it is crucial to have accurate knowledge of the solubility of these components. In this work, the solubilities of 20 proteinogenic amino acids and 21 peptides in aqueous 2-propanol solutions were gravimetrically determined. Additionally, the pH values of the saturated liquid phases were measured and the crystal structures of solid crystals were analysed using X-ray diffraction. The anti-solvent 2-propanol caused a decrease in the solubilities of the amino acids and peptides upon increasing its mass fraction. Exceptions were found for amino acids with aromatic substituents, l-phenylalanine and l-tyrosine. The solubility of 15 amino acids and 18 peptides was successfully modelled using the equation of state PC-SAFT that used recently determined melting properties of the amino acids and peptides as input data.
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Affiliation(s)
- Hoang Tam Do
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, 44227 Dortmund, Germany.
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11
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Roda A, Santos F, Chua YZ, Kumar A, Do HT, Paiva A, Duarte ARC, Held C. Unravelling the nature of citric acid:L-arginine:water mixtures: the bifunctional role of water. Phys Chem Chem Phys 2021; 23:1706-1717. [PMID: 33427255 DOI: 10.1039/d0cp04992a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The use of water as a component of deep eutectic systems (DES) has raised some questions regarding its influence on the nature of the mixture. Does it form a DES or an aqueous solution and what is the role of water? In this work, the nature of citric acid:l-arginine:water mixtures was explored through phase equilibria studies and spectroscopic analysis. In a first step, PC-SAFT was validated as a predictive tool to model the water influence on the solid liquid equilibria (SLE) of the DES reline using the individual-component approach. Hence, activity coefficients in the ternary systems citric acid:l-arginine:water and respective binary combinations were studied and compared using ePC-SAFT. It was observed that the water-free mixtures citric acid:l-arginine showed positive deviation from Raoult's law, while upon addition of water strong negative deviation from Raoult's law was found, yielding melting depressions around 100 K. Besides these strong interactions, pH was found to become acidic (pH = 3.5) upon water addition, which yields the formation of charged species ([H2Cit]- and [l-arg]+). Thus, the increased interactions between the molecules upon water addition might be caused by several mechanisms such as hydrogen bonding or ionic forces, both being induced by water. For further investigation, the liquid mixtures citric acid:l-arginine:water were studied by FTIR and NMR spectroscopy. FTIR spectra disproved a possible solubility enhancement caused by salt formation between citric acid and l-arginine, while NMR spectra supported the formation of a hydrogen bonding network different from the binary systems citric acid:water and l-arginine:water. Either being a DES or other type of non-ideal solution, the liquefaction of the studied systems is certainly caused by a water-mediator effect based on the formation of charged species and cross interactions between the mixture constituents.
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Affiliation(s)
- Ana Roda
- LAQV, REQUIMTE, Departamento de Química da Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Filipa Santos
- LAQV, REQUIMTE, Departamento de Química da Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Yeong Zen Chua
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany
| | - Aarti Kumar
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund, 44227 Dortmund, Germany.
| | - Hoang Tam Do
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund, 44227 Dortmund, Germany.
| | - Alexandre Paiva
- LAQV, REQUIMTE, Departamento de Química da Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Ana Rita C Duarte
- LAQV, REQUIMTE, Departamento de Química da Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Christoph Held
- Laboratory of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund, 44227 Dortmund, Germany.
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12
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Do HT, Chua YZ, Habicht J, Klinksiek M, Volpert S, Hallermann M, Thome M, Pabsch D, Zaitsau D, Schick C, Held C. Melting Properties of Peptides and Their Solubility in Water. Part 2: Di- and Tripeptides Based on Glycine, Alanine, Leucine, Proline, and Serine. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05652] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hoang Tam Do
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Yeong Zen Chua
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, Rostock 18051, Germany
- Competence Centre CALOR, University of Rostock, Albert-Einstein-Str. 25, Rostock 18051, Germany
| | - Jonas Habicht
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Marcel Klinksiek
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Sophia Volpert
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Moritz Hallermann
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Max Thome
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Daniel Pabsch
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
| | - Dzmitry Zaitsau
- Competence Centre CALOR, University of Rostock, Albert-Einstein-Str. 25, Rostock 18051, Germany
- Institute of Chemistry, University of Rostock, Dr-Lorenz-Weg 2, Rostock 18051, Germany
| | - Christoph Schick
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, Rostock 18051, Germany
- Competence Centre CALOR, University of Rostock, Albert-Einstein-Str. 25, Rostock 18051, Germany
- Chemical Institute A. M. Butlerov, Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| | - Christoph Held
- Laboratory of Thermodynamics, TU Dortmund University, Emil-Figge-Str. 70, Dortmund 44227, Germany
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13
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van der Sman R, van den Hoek I, Renzetti S. Sugar replacement with zwitterionic plasticizers like amino acids. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.106113] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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14
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New antifungal compound: Solubility thermodynamics and partitioning processes in biologically relevant solvents. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113148] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Do HT, Chua YZ, Kumar A, Pabsch D, Hallermann M, Zaitsau D, Schick C, Held C. Melting properties of amino acids and their solubility in water. RSC Adv 2020; 10:44205-44215. [PMID: 35517171 PMCID: PMC9058464 DOI: 10.1039/d0ra08947h] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/25/2020] [Indexed: 11/21/2022] Open
Abstract
The state-of-the-art unit operation for separation and purification of amino acids is still crystallization, which requires solubility data and melting properties of pure compounds. Since measuring solubility is time-consuming, prediction tools are desired. Further, melting properties are not yet available due to decomposition of amino acids upon slow heating. In this work, melting properties of twenty amino acids (except Met) were measured by Fast Scanning Calorimetry (FSC) with heating rates up to 20 000 K s−1. PC-SAFT was used to predict interactions in amino acid + water systems. Additionally, solubility, pH, and PXRD was measured. By combining FSC and PC-SAFT, the solubility of 15 amino acids was successfully predicted in a wide temperature range in good agreement with the experimental data. Thus, this work provides melting properties of amino acids for the first time and highlights the usefulness of such data to predict material properties such as aqueous solubility of amino acids. We report the melting properties of amino acids for the first time and highlight the usefulness of such data to predict material properties such as aqueous solubility of amino acids.![]()
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Affiliation(s)
- Hoang Tam Do
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Yeong Zen Chua
- Institute of Physics
- University of Rostock
- 18051 Rostock
- Germany
- Competence Centre CALOR
| | - Aarti Kumar
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Daniel Pabsch
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Moritz Hallermann
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Dzmitry Zaitsau
- Competence Centre CALOR
- University of Rostock
- 18051 Rostock
- Germany
- Institute of Chemistry
| | - Christoph Schick
- Institute of Physics
- University of Rostock
- 18051 Rostock
- Germany
- Competence Centre CALOR
| | - Christoph Held
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
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16
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Baz J, Held C, Pleiss J, Hansen N. Thermophysical properties of glyceline–water mixtures investigated by molecular modelling. Phys Chem Chem Phys 2019; 21:6467-6476. [DOI: 10.1039/c9cp00036d] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Water activity and shear viscosity of water–glyceline mixtures are important process parameters that can be effectively calculated using molecular modelling.
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Affiliation(s)
- Jörg Baz
- Institute of Thermodynamics and Thermal Process Engineering
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Christoph Held
- Department of Biochemical and Chemical Engineering
- Laboratory of Thermodynamics
- Technische Universität Dortmund
- 44227 Dortmund
- Germany
| | - Jürgen Pleiss
- Institute of Biochemistry and Technical Biochemistry
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Niels Hansen
- Institute of Thermodynamics and Thermal Process Engineering
- University of Stuttgart
- 70569 Stuttgart
- Germany
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17
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Do HT, Chua YZ, Habicht J, Klinksiek M, Hallermann M, Zaitsau D, Schick C, Held C. Melting properties of peptides and their solubility in water. Part 1: dipeptides based on glycine or alanine. RSC Adv 2019; 9:32722-32734. [PMID: 35529741 PMCID: PMC9073158 DOI: 10.1039/c9ra05730g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/23/2019] [Indexed: 12/04/2022] Open
Abstract
Melting properties (melting temperature, melting enthalpy and heat capacity difference between liquid and solid phase) of biomolecules are indispensable for natural and engineering sciences. The direct determination of these melting properties by using conventional calorimeters for biological compounds is often not possible due to decomposition during slow heating. In the current study this drawback is overcome by using fast scanning calorimetry (FSC) to directly measure the melting properties of five dipeptides (glycyl-glycine, glycyl-l-alanine, l-alanyl-glycine, l-alanyl-l-alanine and cyclo(l-alanyl-glycine)). The experimental melting properties were used as inputs into a thermodynamic solid–liquid equilibrium relation to predict solubility of the dipeptides in water. The required activity coefficients were predicted with PC-SAFT using solubility-independent model parameters. PC-SAFT predicted different solubility profiles (solubility vs. temperature) of isomers. The predictions were validated by new experimental solubility data, and the crystal structure of the dipeptides in saturated solution was verified by X-ray diffraction. The different water solubility profiles of isomers (glycyl-l-alanine and l-alanyl-glycine) were found to be caused by the big difference in the melting enthalpy of the two dipeptides. To conclude, combining the PC-SAFT and FSC methods allows for accurate prediction of dipeptide solubility in water in a wide temperature range without the need to fit any model parameters to experimental solubility data. Combination of the PC-SAFT and FSC methods allows for accurate prediction of dipeptide solubility in water in a wide temperature range without the need to fit any model parameters to experimental solubility data.![]()
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Affiliation(s)
- Hoang Tam Do
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Yeong Zen Chua
- Institute of Physics
- University of Rostock
- 18051 Rostock
- Germany
- Competence Centre CALOR
| | - Jonas Habicht
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Marcel Klinksiek
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Moritz Hallermann
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Dzmitry Zaitsau
- Competence Centre CALOR
- University of Rostock
- 18051 Rostock
- Germany
- Institute of Chemistry
| | - Christoph Schick
- Institute of Physics
- University of Rostock
- 18051 Rostock
- Germany
- Competence Centre CALOR
| | - Christoph Held
- Laboratory of Thermodynamics
- TU Dortmund University
- 44227 Dortmund
- Germany
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18
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Mukhametzyanov TA, Sedov IA, Solomonov BN, Schick C. Fast scanning calorimetry of lysozyme unfolding at scanning rates from 5 K/min to 500,000 K/min. Biochim Biophys Acta Gen Subj 2018; 1862:2024-2030. [PMID: 29964144 DOI: 10.1016/j.bbagen.2018.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Protein denaturation is often studied using differential scanning calorimetry (DSC). However, conventional instruments are limited in the temperature scanning rate available. Fast scanning calorimetry (FSC) provides an ability to study processes at much higher rates while using extremely small sample masses [ng]. This makes it a very interesting technique for protein investigation. METHODS A combination of conventional DSC and fast scanning calorimeters was used to study denaturation of lysozyme dissolved in glycerol. Glycerol was chosen as a solvent to prevent evaporation from the micro-sized samples of the fast scanning calorimeter. RESULTS The lysozyme denaturation temperatures in the range of scanning rates from 5 K/min to ca. 500,000 K/min follow the Arrhenius law. The experimental results for FSC and conventional DSC fall into two distinct clusters in a Kissinger plot, which are well approximated by two parallel straight lines. CONCLUSIONS The transition temperatures for the unfolding process measured on fast scanning calorimetry sensor are significantly lower than what could be expected from the results of conventional DSC using extrapolation to high scanning rates. Evidence for the influence of the relative surface area on the unfolding temperature was found. GENERAL SIGNIFICANCE For the first time, fast scanning calorimetry was employed to study protein denaturation with a range of temperature scanning rates of 5 orders of magnitude. Decreased thermal stability of the micro-sized samples on the fast scanning calorimeter raise caution over using bulk solution thermal stability data of proteins for applications where micro-sized dispersed protein solutions are used, e.g., spray drying.
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Affiliation(s)
| | - Igor A Sedov
- Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| | - Boris N Solomonov
- Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| | - Christoph Schick
- Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation; University of Rostock, Institute of Physics, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany
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