1
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Yang H, Gladich I, Boucly A, Artiglia L, Ammann M. Orcinol and resorcinol induce local ordering of water molecules near the liquid-vapor interface. ENVIRONMENTAL SCIENCE: ATMOSPHERES 2022; 2:1277-1291. [PMID: 36561553 PMCID: PMC9648629 DOI: 10.1039/d2ea00015f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/17/2022] [Indexed: 12/25/2022]
Abstract
Resorcinol and orcinol are simple members of the family of phenolic compounds present in particulate matter in the atmosphere; they are amphiphilic in nature and thus surface active in aqueous solution. Here, we used X-ray photoelectron spectroscopy to probe the concentration of resorcinol (benzene-1,3-diol) and orcinol (5-methylbenzene-1,3-diol) at the liquid-vapor interface of aqueous solutions. Qualitatively consistent surface propensity and preferential orientation was obtained by molecular dynamics simulations. Auger electron yield near-edge X-ray absorption fine structure (NEXAFS) spectroscopy was used to probe the hydrogen bonding (HB) structure, indicating that the local structure of water molecules near the surface of the resorcinol and orcinol solutions tends towards a larger fraction of tetrahedrally coordinated molecules than observed at the liquid-vapor interface of pure water. The order parameter obtained from the molecular dynamics simulations confirm these observations. This effect is being discussed in terms of the formation of an ordered structure of these molecules at the surface leading to patterns of hydrated OH groups with distances among them that are relatively close to those in ice. These results suggest that the self-assembly of phenolic species at the aqueous solution-air interface could induce freezing similar to the case of fatty alcohol monolayers and, thus, be of relevance for ice nucleation in the atmosphere. We also attempted at looking at the changes of the O 1b1, 3a2 and 1b2 molecular orbitals of liquid water, which are known to be sensitive to the HB structure as well, in response to the presence of resorcinol and orcinol. However, these changes remained negligible within uncertainty for both experimentally obtained valence spectra and theoretically calculated density of states.
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Affiliation(s)
- Huanyu Yang
- Laboratory of Environmental Chemistry, Paul Scherrer Institut5232 VilligenSwitzerland,Institute of Atmospheric and Climate Science, ETH Zürich8092 ZürichSwitzerland
| | - Ivan Gladich
- Qatar Environment & Energy Research Institute, Hamad Bin Khalifa UniversityP.O. Box 34110DohaQatar
| | - Anthony Boucly
- Laboratory of Environmental Chemistry, Paul Scherrer Institut5232 VilligenSwitzerland,Electrochemistry Laboratory, Paul Scherrer Institut5232 VilligenSwitzerland
| | - Luca Artiglia
- Laboratory of Environmental Chemistry, Paul Scherrer Institut5232 VilligenSwitzerland,Laboratory for Catalysis and Sustainable Chemistry, Paul Scherrer Institut5232 VilligenSwitzerland
| | - Markus Ammann
- Laboratory of Environmental Chemistry, Paul Scherrer Institut5232 VilligenSwitzerland
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2
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Chakraborty S, Stubbs AD, Kahan TF. Direct Observation of Anthracene Clusters at Ice Surfaces. J Am Chem Soc 2022; 144:751-756. [PMID: 34982936 DOI: 10.1021/jacs.1c09220] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heterogeneous processes can control atmospheric composition. Snow and ice present important, but poorly understood, reaction media that can greatly alter the composition of air in the cryosphere in polar and temperate regions. Atmospheric scientists struggle to reconcile model predictions with field observations in snow-covered regions due in part to experimental challenges associated with monitoring reactions at air-ice interfaces, and debate regarding reaction kinetics and mechanisms has persisted for over a decade. In this work, we use wavelength-resolved fluorescence microscopy to determine the distribution and chemical speciation of the pollutant anthracene at environmentally relevant frozen surfaces. Our results indicate that anthracene adsorbs to frozen surfaces in monomeric form, but that following lateral diffusion, molecules ultimately reside within brine channels at saltwater ice surfaces, and in micron-sized clusters at freshwater ice surfaces; emission profiles indicate extensive self-association. We also measure anthracene photodegradation kinetics in aqueous solution and artificial snow prepared from frozen freshwater and saltwater solutions. Our results suggest that anthracene─and likely other aromatic pollutants─undergo bimolecular photodegradation at the surface of freshwater ice and sea ice, but not at the surface of frozen organic matter. These results will improve predictions of pollutant fate and exposure risk in the cryosphere. The techniques used can be applied to numerous surfaces within and beyond the atmospheric sciences.
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Affiliation(s)
- Subha Chakraborty
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Annastacia D Stubbs
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.,Dept. of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, New York 13244, United States
| | - Tara F Kahan
- Dept. of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.,Dept. of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, New York 13244, United States
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3
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Veselý L, Susrisweta B, Heger D. Making good's buffers good for freezing: The acidity changes and their elimination via mixing with sodium phosphate. Int J Pharm 2021; 593:120128. [PMID: 33271311 DOI: 10.1016/j.ijpharm.2020.120128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 10/22/2022]
Abstract
Solutions of three Good's buffers (HEPES, MOPS, and MES), both pure and mixed with sodium phosphate buffers (Na-P), are investigated in terms of the freezing-induced acidity changes in their operational pH ranges. The Good's buffers have the tendency to basify upon freezing and, more intensively, at lower pHs. The acidity varies most prominently in MES, where the change may reach the value of two. Importantly, the Good's buffers are shown to mitigate the strong acidification in the Na-P buffer. Diverse concentrations of the Good's buffers are added to cancel out the strong, freezing-induced acidity drop in 50 mM Na-P that markedly contributes to the solution's acidity; the relevant values are 3 mM HEPES, 10 mM MOPS, and 80 mM MES. These buffer blends are therefore proposed to be applied in maintaining approximately the acidity of solutions even after the freezing process and, as such, should limit the stresses for frozen chemicals and biochemicals.
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Affiliation(s)
- Lukáš Veselý
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Behera Susrisweta
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Dominik Heger
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.
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4
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Ondrušková G, Veselý L, Zezula J, Bachler J, Loerting T, Heger D. Using Excimeric Fluorescence to Study How the Cooling Rate Determines the Behavior of Naphthalenes in Freeze-Concentrated Solutions: Vitrification and Crystallization. J Phys Chem B 2020; 124:10556-10566. [PMID: 33156630 DOI: 10.1021/acs.jpcb.0c07817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We utilized fluorescence spectroscopy to learn about the molecular arrangement of naphthalene (Np) and 1-methylnaphthalene (MeNp) in frozen aqueous solutions. The freezing induces pronounced compound aggregation in the freeze-concentrated solution (FCS) in between the ice grains. The fluorescence spectroscopy revealed prevalent formation of a vitrified solution and minor crystallization of aromatic compounds. The FCS is shown as a specific environment, differing significantly from not only the pure compounds but also the ice surfaces. The results indicate marked disparity between the behavior of the Np and the MeNp; the cooling rate has a major impact on the former but not on the latter. The spectrum of the Np solution frozen at a faster cooling rate (ca 20 K/min) exhibited a temperature-dependent spectral behavior, whereas the spectrum of the solution frozen at a slower rate (ca 2 K/min) did not alter before melting. We interpret the observation through considering the varied composition of the FCS: Fast freezing leads to a higher water content expressed by the plasticizing effect, allowing molecular rearrangement, while slow cooling produces a more concentrated and drier environment. The experiments were conceived as generalizable for environmentally relevant pollutants and human-made freezing.
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Affiliation(s)
- Gabriela Ondrušková
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Lukáš Veselý
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Jan Zezula
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Johannes Bachler
- Institute of Physical Chemistry, University of Innsbruck, Innrine 52c, A-6020 Innsbruck, Austria
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, Innrine 52c, A-6020 Innsbruck, Austria
| | - Dominik Heger
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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5
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Bononi FC, Chen Z, Rocca D, Andreussi O, Hullar T, Anastasio C, Donadio D. Bathochromic Shift in the UV–Visible Absorption Spectra of Phenols at Ice Surfaces: Insights from First-Principles Calculations. J Phys Chem A 2020; 124:9288-9298. [DOI: 10.1021/acs.jpca.0c07038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Fernanda C. Bononi
- Department of Chemistry, University of California Davis, Davis, California 95616-5270, United States
| | - Zekun Chen
- Department of Chemistry, University of California Davis, Davis, California 95616-5270, United States
| | - Dario Rocca
- Université de Lorraine, CNRS, LPTC, F-54000 Nancy, France
| | - Oliviero Andreussi
- Department of Physics, University of North Texas Denton, Texas 76203, United States
| | - Ted Hullar
- Department of Land, Air and Water Resources, University of California Davis Davis, California 95616-8627, United States
| | - Cort Anastasio
- Department of Land, Air and Water Resources, University of California Davis Davis, California 95616-8627, United States
| | - Davide Donadio
- Department of Chemistry, University of California Davis, Davis, California 95616-5270, United States
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6
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Hullar T, Bononi FC, Chen Z, Magadia D, Palmer O, Tran T, Rocca D, Andreussi O, Donadio D, Anastasio C. Photodecay of guaiacol is faster in ice, and even more rapid on ice, than in aqueous solution. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1666-1677. [PMID: 32671365 DOI: 10.1039/d0em00242a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Snowpacks contain a wide variety of inorganic and organic compounds, including some that absorb sunlight and undergo direct photoreactions. How the rates of these reactions in, and on, ice compare to rates in water is unclear: some studies report similar rates, while others find faster rates in/on ice. Further complicating our understanding, there is conflicting evidence whether chemicals react more quickly at the air-ice interface compared to in liquid-like regions (LLRs) within the ice. To address these questions, we measured the photodegradation rate of guaiacol (2-methoxyphenol) in various sample types, including in solution, in ice, and at the air-ice interface of nature-identical snow. Compared to aqueous solution, we find modest rate constant enhancements (increases of 3- to 6-fold) in ice LLRs, and much larger enhancements (of 17- to 77-fold) at the air-ice interface of nature-identical snow. Our computational modeling suggests the absorption spectrum for guaiacol red-shifts and increases on ice surfaces, leading to more light absorption, but these changes explain only a small portion (roughly 2 to 9%) of the observed rate constant enhancements in/on ice. This indicates that increases in the quantum yield are primarily responsible for the increased photoreactivity of guaiacol on ice; relative to solution, our results suggest that the quantum yield is larger by a factor of roughly 3-6 in liquid-like regions and 12-40 at the air-ice interface.
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Affiliation(s)
- Ted Hullar
- Department of Land, Air and Water Resources, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.
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7
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Vetráková Ľ, Neděla V, Runštuk J, Tihlaříková E, Heger D, Shalaev E. Dynamical in-situ observation of the lyophilization and vacuum-drying processes of a model biopharmaceutical system by an environmental scanning electron microscope. Int J Pharm 2020; 585:119448. [PMID: 32461002 DOI: 10.1016/j.ijpharm.2020.119448] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 04/23/2020] [Accepted: 05/18/2020] [Indexed: 01/22/2023]
Abstract
The paper discusses the real-time monitoring of the changing sample morphology during the entire lyophilization (freeze-drying) and vacuum-drying processes of model biopharmaceutical solutions by using an environmental scanning electron microscope (ESEM); the device's micromanipulators were used to study the interior of the samples in-situ without exposing the samples to atmospheric water vapor. The individual collapse temperatures (Tc) of the formulations, pure bovine serum albumin (BSA) and BSA/sucrose mixtures, ranged from -5 to -29 °C. We evaluated the impact of the freezing method (spontaneous freezing, controlled ice nucleation, and spray freezing) on the morphologies of the lyophiles at the constant drying temperature of -20 °C. The formulations with Tc above -20 °C resulted in the lyophiles' morphologies significantly dependent on the freezing method. We interpret the observations as an interplay of the freezing rates and directionalities, both of which markedly influence the morphologies of the frozen formulations, and, subsequently, the drying process and the mechanical stability of the freeze-dried cake. The formulation with Tc below -20 °C yielded a collapsed cake with features independent of the freezing method. The vacuum-drying produced a material with a smooth and pore-free surface, where deep cracks developed at the end of the process.
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Affiliation(s)
- Ľubica Vetráková
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic.
| | - Vilém Neděla
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Jiří Runštuk
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Eva Tihlaříková
- Environmental Electron Microscopy Group, Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Dominik Heger
- Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - Evgenyi Shalaev
- Pharmaceutical Development, Allergan plc, Irvine, CA, United States.
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8
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Wang Z, Henke S, Paulus M, Welle A, Fan Z, Rodewald K, Rieger B, Fischer RA. Defect Creation in Surface-Mounted Metal-Organic Framework Thin Films. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2655-2661. [PMID: 31840974 DOI: 10.1021/acsami.9b18672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Defect engineering is a strategy for tailoring the properties of metal-organic frameworks (MOFs). Plenty of efforts have been devoted to study the defect chemistry and structures of bulk MOFs; however, the reported example of a defect-engineered surface-mounted MOF (SURMOF) thin film is rare. In this work, defects were incorporated in SURMOF thin films by using defect-generating linkers and taking advantage of the liquid-phase stepwise epitaxial layer-by-layer growth (LBL). Two methods based on the LBL, named mixing method and alternating method, are proposed for incorporating defects in the prototypical SURMOF HKUST-1 by partially substituting the parent H3btc (benzene-1,3,5-tricarboxylic acid) linker with a set of defect-generating linkers H2ip (isophthalic acid), H2OH-ip (5-hydroxyisophthalic acid), and H2pydc (3,5-pyridinedicarboxylic acid). The crystallinity and phase purity of the obtained "defected" SURMOFs were confirmed by X-ray diffraction, infrared reflection absorption spectroscopy, and Raman spectroscopy. The incorporation of the defect-generating linkers and the types of induced defects were characterized by ultraviolet-visible spectroscopy, time-of-flight secondary ion mass spectrometry, methanol adsorption, scanning electron microscopy, and 1H nuclear magnetic resonance spectroscopy (after digestion of the samples). These two methods provide avenues for controlling the defect formation in MOF thin films.
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Affiliation(s)
| | - Sebastian Henke
- Anorganische Chemie, Fakultät für Chemie und Chemische Biologie , Technische Universität Dortmund , Otto-Hahn Str. 6 , 44227 Dortmund , Germany
| | - Michael Paulus
- Fakultät Physik/DELTA , Technische Universität Dortmund , Maria-Goeppert-Mayer-Str. 2 , 44221 Dortmund , Germany
| | - Alexander Welle
- Karlsruher Institut für Technologie , Institut für Funktionelle Grenzflächen (IFG) and Karlsruhe Nano Micro Facility (KNMF) , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
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9
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Imrichová K, Veselý L, Gasser TM, Loerting T, Neděla V, Heger D. Vitrification and increase of basicity in between ice Ihcrystals in rapidly frozen dilute NaCl aqueous solutions. J Chem Phys 2019; 151:014503. [DOI: 10.1063/1.5100852] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Kamila Imrichová
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
- Institute of Scientific Instruments of the ASCR, v.v.i., Královopolská 147, 61264 Brno, Czech Republic
| | - Lukáš Veselý
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Tobias M. Gasser
- Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Vilém Neděla
- Institute of Scientific Instruments of the ASCR, v.v.i., Královopolská 147, 61264 Brno, Czech Republic
| | - Dominik Heger
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
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10
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Hullar T, Magadia D, Anastasio C. Photodegradation Rate Constants for Anthracene and Pyrene Are Similar in/on Ice and in Aqueous Solution. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12225-12234. [PMID: 30251528 DOI: 10.1021/acs.est.8b02350] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Snowpacks contain a variety of chemicals, including organic pollutants such as toxic polycyclic aromatic hydrocarbons (PAHs). While PAHs undergo photodegradation in snow and ice, the rates of these reactions remain in debate. Some studies report that photochemical reactions in snow proceed at rates similar to those expected in a supercooled aqueous solution, but other studies report faster reaction rates, particularly at the air-ice interface (i.e., the quasi-liquid layer, or QLL). In addition, one study reported a surprising nonlinear dependence on photon flux. Here we examine the photodegradation of two common PAHs, anthracene and pyrene, in/on ice and in solution. For a given PAH, rate constants are similar in aqueous solution, in internal liquid-like regions of ice, and at the air-ice interface. In addition, we find the expected linear relationship between reaction rate constant and photon flux. Our results indicate that rate constants for the photochemical loss of PAHs in, and on, snow and ice are very similar to those in aqueous solution, with no enhancement at the air-ice interface.
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Affiliation(s)
- Ted Hullar
- Department of Land, Air and Water Resources , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Danielle Magadia
- Department of Land, Air and Water Resources , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
- Now at California Department of Food and Agriculture , 3292 Meadowview , Sacramento , California 95832 , United States
| | - Cort Anastasio
- Department of Land, Air and Water Resources , University of California, Davis , One Shields Avenue , Davis , California 95616 , United States
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11
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Zhong J, Carignano MA, Kais S, Zeng XC, Francisco JS, Gladich I. Tuning the Stereoselectivity and Solvation Selectivity at Interfacial and Bulk Environments by Changing Solvent Polarity: Isomerization of Glyoxal in Different Solvent Environments. J Am Chem Soc 2018; 140:5535-5543. [DOI: 10.1021/jacs.8b01503] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Zhong
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Marcelo A. Carignano
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, P.O. Box 31110, Doha, Qatar
| | - Sabre Kais
- Department of Chemistry, Department of Physics and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Joseph S. Francisco
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Ivan Gladich
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, P.O. Box 31110, Doha, Qatar
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12
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Müller K, Singh Malhi J, Wohlgemuth J, Fischer RA, Wöll C, Gliemann H, Heinke L. Water as a modulator in the synthesis of surface-mounted metal–organic framework films of type HKUST-1. Dalton Trans 2018; 47:16474-16479. [PMID: 30406780 DOI: 10.1039/c8dt03310b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
By using water as modulator, the growth of thin nanoporous SURMOF films, prepared in a layer-by-layer fashion, can be improved.
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Affiliation(s)
- Kai Müller
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Jasleen Singh Malhi
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Jonas Wohlgemuth
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Roland A. Fischer
- Inorganic and Metal-Organic Chemistry
- Catalysis Research Centre
- Technical University Munich
- D-85748 Garching
- Germany
| | - Christof Wöll
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Hartmut Gliemann
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Lars Heinke
- Institute of Functional Interfaces (IFG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
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13
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Corrochano P, Nachtigallová D, Klán P. Photooxidation of Aniline Derivatives Can Be Activated by Freezing Their Aqueous Solutions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:13763-13770. [PMID: 29148724 DOI: 10.1021/acs.est.7b04510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A combined experimental and computational approach was used to investigate the spectroscopic properties of three different aniline derivatives (aniline, N,N-dimethylaniline, and N,N-diethylaniline) in aqueous solutions and at the air-ice interface in the temperature range of 243-298 K. The absorption and diffuse reflectance spectra of ice samples prepared by different techniques, such as slow or shock freezing of the aqueous solutions or vapor deposition on ice grains, exhibited unequivocal bathochromic shifts of 10-15 nm of the absorption maxima of anilines in frozen samples compared to those in liquid aqueous solutions. DFT and SCS-ADC(2) calculations showed that contaminant-contaminant and contaminant-ice interactions are responsible for these shifts. Finally, we demonstrate that irradiation of anilines in the presence of a hydrogen peroxide/O2 system by wavelengths that overlap only with the red-shifted absorption tails of anilines in frozen samples (while having a marginal overlap with their spectra in liquid solutions) can almost exclusively trigger a photochemical oxidation process. Mechanistic and environmental considerations are discussed.
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Affiliation(s)
- Pablo Corrochano
- RECETOX, Faculty of Science, Masaryk University , Kamenice 5, 62500 Brno, Czech Republic
| | - Dana Nachtigallová
- Institute of Organic Chemistry and Biochemistry , Flemingovo nam. 2, 16610 Prague, Czech Republic
| | - Petr Klán
- RECETOX, Faculty of Science, Masaryk University , Kamenice 5, 62500 Brno, Czech Republic
- Department of Chemistry, Faculty of Science, Masaryk University , Kamenice 5, 62500 Brno, Czech Republic
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14
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Malongwe JK, Nachtigallová D, Corrochano P, Klán P. Spectroscopic Properties of Anisole at the Air-Ice Interface: A Combined Experimental-Computational Approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5755-5764. [PMID: 27243785 DOI: 10.1021/acs.langmuir.6b01187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A combined experimental and computational approach was used to investigate the spectroscopic properties of anisole in aqueous solutions and at the ice-air interface in the temperature range of 77-298 K. The absorption, diffuse reflectance, and emission spectra of ice samples containing anisole prepared by different techniques, such as slow freezing (frozen aqueous solutions), shock freezing (ice grains), or anisole vapor deposition on ice grains, were measured to evaluate changes in the contaminated ice matrix that occur at different temperatures. It was found that the position of the lowest absorption band of anisole and its tail shift bathochromically by ∼4 nm in frozen samples compared to liquid aqueous solutions. On the other hand, the emission spectra of aqueous anisole solutions were found to fundamentally change upon freezing. While one emission band (∼290 nm) was observed under all circumstances, the second band at ∼350 nm, assigned to an anisole excimer, appeared only at certain temperatures (150-250 K). Its disappearance at lower temperatures is attributed to the formation of crystalline anisole on the ice surface. DFT and ADC(2) calculations were used to interpret the absorption and emission spectra of anisole monomer and dimer associates. Various stable arrangements of the anisole associates were found at the disordered water-air interface in the ground and excited states, but only those with a substantial overlap of the aromatic rings are manifested by the emission band at ∼350 nm.
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Affiliation(s)
| | - Dana Nachtigallová
- Institute of Organic Chemistry and Biochemistry, Flemingovo nam. 2, 166 10 Prague, Czech Republic
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15
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Hoehn RD, Carignano MA, Kais S, Zhu C, Zhong J, Zeng XC, Francisco JS, Gladich I. Hydrogen bonding and orientation effects on the accommodation of methylamine at the air-water interface. J Chem Phys 2016; 144:214701. [DOI: 10.1063/1.4950951] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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16
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Krausková Ľ, Procházková J, Klašková M, Filipová L, Chaloupková R, Malý S, Damborský J, Heger D. Suppression of protein inactivation during freezing by minimizing pH changes using ionic cryoprotectants. Int J Pharm 2016; 509:41-49. [PMID: 27224008 DOI: 10.1016/j.ijpharm.2016.05.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 05/09/2016] [Accepted: 05/16/2016] [Indexed: 11/26/2022]
Abstract
Freezing and lyophilization are often used for stabilization of biomolecules; however, this sometimes results in partial degradation and loss of biological function in these molecules. In this study we examined the effect of freezing-induced acidity changes on denaturation of the model enzyme haloalkane dehalogenase under various experimental conditions. The effective local pH of frozen solutions is shown to be the key causal factor in protein stability. To preserve the activity of frozen-thawed enzymes, acidity changes were prevented by the addition of an ionic cryoprotectant, a compound which counteracts pH changes during freezing due to selective incorporation of its ions into the ice. This approach resulted in complete recovery of enzyme activity after multiple freeze-thaw cycles. We propose the utilization of ionic cryoprotectants as a new and effective cryopreservation method in research laboratories as well as in industrial processes.
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Affiliation(s)
- Ľubica Krausková
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A8, 625 00 Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment RECETOX, Faculty of Science, Masaryk University, Kamenice 5/A29, 625 00 Brno, Czech Republic
| | - Jitka Procházková
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A8, 625 00 Brno, Czech Republic
| | - Martina Klašková
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A8, 625 00 Brno, Czech Republic
| | - Lenka Filipová
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A8, 625 00 Brno, Czech Republic
| | - Radka Chaloupková
- Loschmidt Laboratories, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5/A13, 625 00 Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment RECETOX, Faculty of Science, Masaryk University, Kamenice 5/A29, 625 00 Brno, Czech Republic
| | - Stanislav Malý
- Central Institute for Supervising and Testing in Agriculture, Hroznová 2, CZ-656 06, Czech Republic
| | - Jiří Damborský
- Loschmidt Laboratories, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5/A13, 625 00 Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment RECETOX, Faculty of Science, Masaryk University, Kamenice 5/A29, 625 00 Brno, Czech Republic
| | - Dominik Heger
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A8, 625 00 Brno, Czech Republic; Research Centre for Toxic Compounds in the Environment RECETOX, Faculty of Science, Masaryk University, Kamenice 5/A29, 625 00 Brno, Czech Republic.
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17
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Krausko J, Ondrušková G, Heger D. Comment on “Photolysis of Polycyclic Aromatic Hydrocarbons on Water and Ice Surfaces” and on “Nonchromophoric Organic Matter Suppresses Polycyclic Aromatic Hydrocarbon Photolysis in Ice and at Ice Surfaces”. J Phys Chem A 2015; 119:10761-3. [DOI: 10.1021/acs.jpca.5b08276] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ján Krausko
- Department
of Chemistry and
RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Gabriela Ondrušková
- Department
of Chemistry and
RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Dominik Heger
- Department
of Chemistry and
RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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18
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Krausko J, Malongwe JK, Bičanová G, Klán P, Nachtigallová D, Heger D. Spectroscopic Properties of Naphthalene on the Surface of Ice Grains Revisited: A Combined Experimental–Computational Approach. J Phys Chem A 2015; 119:8565-78. [DOI: 10.1021/acs.jpca.5b00941] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Dana Nachtigallová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo
nam. 2, 166 10 Prague, Czech Republic
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19
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George C, Ammann M, D’Anna B, Donaldson DJ, Nizkorodov S. Heterogeneous photochemistry in the atmosphere. Chem Rev 2015; 115:4218-58. [PMID: 25775235 PMCID: PMC4772778 DOI: 10.1021/cr500648z] [Citation(s) in RCA: 287] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Indexed: 02/06/2023]
Affiliation(s)
- Christian George
- Université
de Lyon 1, Lyon F-69626, France
- CNRS, UMR5256,
IRCELYON, Institut de Recherches sur la Catalyse et
l’Environnement de Lyon, Villeurbanne F-69626, France
| | - Markus Ammann
- Laboratory
of Radiochemistry and Environmental Chemistry, Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - Barbara D’Anna
- Université
de Lyon 1, Lyon F-69626, France
- CNRS, UMR5256,
IRCELYON, Institut de Recherches sur la Catalyse et
l’Environnement de Lyon, Villeurbanne F-69626, France
| | - D. J. Donaldson
- Department
of Chemistry and Department of Physical & Environmental Sciences, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Sergey
A. Nizkorodov
- Department
of Chemistry, University of California, Irvine, California 92697, United States
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