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Kong H, Gupta S, Pérez-Torres AF, Höhn C, Bogdanoff P, Mayer MT, van de Krol R, Favaro M, Abdi FF. Electrolyte selection toward efficient photoelectrochemical glycerol oxidation on BiVO 4. Chem Sci 2024; 15:10425-10435. [PMID: 38994405 PMCID: PMC11234828 DOI: 10.1039/d4sc01651c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 05/31/2024] [Indexed: 07/13/2024] Open
Abstract
Glycerol, a primary by-product of biodiesel production, can be oxidized into various value-added chemicals, significantly enhancing the techno-economic value of photoelectrochemical (PEC) cells. Several studies have explored various photoelectrode materials and co-catalysts, but the influence of electrolytes on PEC glycerol oxidation has remained relatively unexplored despite its significance. Here, we explore the impact of various acidic (pH = 2) electrolytes, namely NaNO3, NaClO4, Na2SO4, K2SO4, and KPi, on PEC glycerol oxidation using nanoporous thin film BiVO4 as a model photoanode. Our experimental findings reveal that the choice of electrolyte anion and cation significantly affects the PEC performance (i.e., photocurrent, onset potential, stability, and selectivity towards value-added products) of BiVO4 for glycerol oxidation. To explain this interesting phenomenon, we correlate the observed performance trend with the ion specificity in the Hofmeister series as well as the buffering capacity of the electrolytes. Notably, NaNO3 is identified as the optimal electrolyte for PEC glycerol oxidation with BiVO4 when considering various factors such as stability and production rates for glycerol oxidation reaction (GOR) products, surpassing the previously favored Na2SO4. Glycolaldehyde emerges as the most dominant product with ∼50% selectivity in NaNO3. The general applicability of our findings is confirmed by similar observation in electrochemical (EC) GOR with a polycrystalline platinum anode. Overall, these results emphasize the critical role of electrolyte selection in enhancing the efficiency of EC/PEC glycerol oxidation.
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Affiliation(s)
- Heejung Kong
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Siddharth Gupta
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
- Institut für Chemie & Biochemie, Freie Universität Berlin 14195 Berlin Germany
| | - Andrés F Pérez-Torres
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Christian Höhn
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Peter Bogdanoff
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Matthew T Mayer
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
- Institut für Chemie & Biochemie, Freie Universität Berlin 14195 Berlin Germany
| | - Roel van de Krol
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
- Institut für Chemie, Technische Universität Berlin Straße des 17. Juni 124 10623 Berlin Germany
| | - Marco Favaro
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Fatwa F Abdi
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
- School of Energy and Environment, City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong S.A.R. China
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Chattopadhyay N, Das A. Effect of ionic strength on aggregation of nile red and coumarin 30 in aqueous medium: primary kinetic salt effect or salting-out effect? RSC Adv 2023; 13:25159-25168. [PMID: 37622019 PMCID: PMC10445056 DOI: 10.1039/d3ra03829g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
The effect of ionic strength on the aggregation of planar dyes like nile red (NR) and coumarin-30 (C30) in aqueous medium has been explored. The dyes are known to undergo dimerization, resulting in fading of their respective colors in the visible range. The present study demonstrates that the fading process is accelerated appreciably upon increasing ionic strength of the solution through addition of soluble salts. Experiments consist of variation of cations (Na+, Mg2+ and Al3+) with different valencies in a series of salts keeping the anion same and a similar set with a variation of anions (NO3-, SO42- and PO43-), keeping the cation same. The question of involvement of 'primary kinetic salt effect' or 'salting-out effect' for accelerating the aggregation process has also been resolved. Using Na+, K+ and NH4+ ions with the same counterpart NO3-, our experimental results do not show any differential effect, in terms of making the aggregation process faster, and hence rule out any effect of Hofmeister series on the self-aggregation process. The detailed study explicitly establishes that it is the 'primary kinetic salt effect' and not the 'salting-out effect' that is involved in the present case.
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Affiliation(s)
| | - Arindam Das
- Department of Chemistry, Jadavpur University Kolkata 700 032 India
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de Bruyn E, Dorn AE, Zimmermann O, Rossetti G. SPEADI: Accelerated Analysis of IDP-Ion Interactions from MD-Trajectories. BIOLOGY 2023; 12:biology12040581. [PMID: 37106781 PMCID: PMC10135740 DOI: 10.3390/biology12040581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023]
Abstract
The disordered nature of Intrinsically Disordered Proteins (IDPs) makes their structural ensembles particularly susceptible to changes in chemical environmental conditions, often leading to an alteration of their normal functions. A Radial Distribution Function (RDF) is considered a standard method for characterizing the chemical environment surrounding particles during atomistic simulations, commonly averaged over an entire or part of a trajectory. Given their high structural variability, such averaged information might not be reliable for IDPs. We introduce the Time-Resolved Radial Distribution Function (TRRDF), implemented in our open-source Python package SPEADI, which is able to characterize dynamic environments around IDPs. We use SPEADI to characterize the dynamic distribution of ions around the IDPs Alpha-Synuclein (AS) and Humanin (HN) from Molecular Dynamics (MD) simulations, and some of their selected mutants, showing that local ion-residue interactions play an important role in the structures and behaviors of IDPs.
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Affiliation(s)
- Emile de Bruyn
- Jülich Supercomputing Centre, Forschungszentrum Jülich, 52425 Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Anton Emil Dorn
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Olav Zimmermann
- Jülich Supercomputing Centre, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Giulia Rossetti
- Jülich Supercomputing Centre, Forschungszentrum Jülich, 52425 Jülich, Germany
- Computational Biomedicine, Institute for Advanced Simulation IAS-5 and Institute of Neuroscience and Medicine INM-9, Forschungszentrum Jülich, 52425 Jülich, Germany
- Department of Neurology, RWTH Aachen University, 52062 Aachen, Germany
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Nguyen KDQ, Vigers M, Sefah E, Seppälä S, Hoover JP, Schonenbach NS, Mertz B, O'Malley MA, Han S. Homo-oligomerization of the human adenosine A 2A receptor is driven by the intrinsically disordered C-terminus. eLife 2021; 10:e66662. [PMID: 34269678 PMCID: PMC8328514 DOI: 10.7554/elife.66662] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 07/15/2021] [Indexed: 11/27/2022] Open
Abstract
G protein-coupled receptors (GPCRs) have long been shown to exist as oligomers with functional properties distinct from those of the monomeric counterparts, but the driving factors of oligomerization remain relatively unexplored. Herein, we focus on the human adenosine A2A receptor (A2AR), a model GPCR that forms oligomers both in vitro and in vivo. Combining experimental and computational approaches, we discover that the intrinsically disordered C-terminus of A2AR drives receptor homo-oligomerization. The formation of A2AR oligomers declines progressively with the shortening of the C-terminus. Multiple interaction types are responsible for A2AR oligomerization, including disulfide linkages, hydrogen bonds, electrostatic interactions, and hydrophobic interactions. These interactions are enhanced by depletion interactions, giving rise to a tunable network of bonds that allow A2AR oligomers to adopt multiple interfaces. This study uncovers the disordered C-terminus as a prominent driving factor for the oligomerization of a GPCR, offering important insight into the effect of C-terminus modification on receptor oligomerization of A2AR and other GPCRs reconstituted in vitro for biophysical studies.
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Affiliation(s)
- Khanh Dinh Quoc Nguyen
- Department of Chemistry and Biochemistry, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Michael Vigers
- Department of Chemical Engineering, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Eric Sefah
- C. Eugene Bennett Department of Chemistry, West Virginia UniversityMorgantownUnited States
| | - Susanna Seppälä
- Department of Chemical Engineering, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Jennifer Paige Hoover
- Department of Chemistry and Biochemistry, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Nicole Star Schonenbach
- Department of Chemical Engineering, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Blake Mertz
- C. Eugene Bennett Department of Chemistry, West Virginia UniversityMorgantownUnited States
| | - Michelle Ann O'Malley
- Department of Chemical Engineering, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Songi Han
- Department of Chemistry and Biochemistry, University of California, Santa BarbaraSanta BarbaraUnited States
- Department of Chemical Engineering, University of California, Santa BarbaraSanta BarbaraUnited States
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Pica A, Graziano G. Effect of sodium thiocyanate and sodium perchlorate on poly(N-isopropylacrylamide) collapse. Phys Chem Chem Phys 2019; 22:189-195. [PMID: 31799525 DOI: 10.1039/c9cp05706d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The T(collapse) of poly(N-isopropylacrylamide), PNIPAM, shows a nonlinear dependence on the concentration of NaSCN or NaClO4; in the case of NaClO4, for example, at very low concentrations of the salt, T(collapse) increases with the concentration, while it has an opposite trend at higher NaClO4 concentrations [J. Am. Chem. Soc., 2005, 127, 14505]. These puzzling experimental data can be rationalized by considering that low charge density and poorly hydrated ions, such as thiocyanate and perchlorate, interact preferentially with the surface of the polymer, and cause an increase of the magnitude of the energetic term that stabilizes swollen conformations at low salt concentrations. However, as both swollen and collapsed PNIPAM conformations are accessible to such ions in view of their large conformational freedom, the difference in the number of ions bound to PNIPAM surface upon collapse changes little on increasing the salt concentration. Thus, the energetic term that favors swollen conformations increases with salt concentration to a lesser extent than the solvent-excluded volume term (linked to the density increase caused by salt addition to water), that favors collapsed conformations, leading to a nonlinear trend of T(collapse).
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Affiliation(s)
- Andrea Pica
- European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, Grenoble, France
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Zhao Y, Qu D, Zhou R, Yang X, Kong W, Ren H. Enhancing bacterial transport with saponins in saturated porous media for the bioaugmentation of groundwater: visual investigation and surface interactions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:26539-26549. [PMID: 29992413 DOI: 10.1007/s11356-018-2477-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 06/01/2018] [Indexed: 06/08/2023]
Abstract
The success of bioaugmentation processes for the remediation of groundwater contamination relies on effective transport of the injected microorganisms in a subsurface environment. Biosurfactants potentially affect bacterial attachment and transport behavior in porous media. Although saponins as biosurfactants are abundant in nature, their influence on bacterial transport in groundwater systems remains unknown. In this research, tank visual-transport experiments, breakthrough curve monitoring, and surface property measurement were performed to evaluate the effects of saponins on the transport of Pseudomonas migulae AN-1 cells, which were used as a model bacterium in saturated sand. Results show that the 0.1% saponins could effectively facilitated the AN-1 secondary transport and the addition of saponins decreased the hydrophobicity of AN-1 and sand. The role of the promotion of saponins was more dominant than that of the inhibition of ions on AN-1 transport in a saturated porous medium when ions and saponins coexisted. The interactions between AN-1 and sand grains with saponins and ions were explained in accordance with the Derjaguin-Landau-Verwey-Overbeek theory.
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Affiliation(s)
- Yongsheng Zhao
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Dan Qu
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
- Baohang Environment Company Limited, 13 Beiyuan Road 1st, Beijing, 100107, People's Republic of China
| | - Rui Zhou
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Xinru Yang
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Wenbo Kong
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Hejun Ren
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China.
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Hyde AM, Zultanski SL, Waldman JH, Zhong YL, Shevlin M, Peng F. General Principles and Strategies for Salting-Out Informed by the Hofmeister Series. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00197] [Citation(s) in RCA: 204] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Alan M. Hyde
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Susan L. Zultanski
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Jacob H. Waldman
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Yong-Li Zhong
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Michael Shevlin
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Feng Peng
- Department of Process Chemistry, MRL, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States
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8
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Pica A, Graziano G. On the effect of sodium salts on the coil-to-globule transition of poly(N-isopropylacrylamide). Phys Chem Chem Phys 2015; 17:27750-7. [DOI: 10.1039/c5cp04094a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addition of sodium salts to water increases the density, thereby increasing the magnitude of the solvent-excluded volume effect and stabilizing the globule state of PNIPAM.
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Affiliation(s)
- Andrea Pica
- Dipartimento di Scienze Chimiche
- Università degli Studi di Napoli Federico II
- Complesso Universitario di Monte Sant'Angelo
- Naples
- Italy
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9
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Laboratory evaluation of the use of solvent extraction for separation of hydrophobic organic contaminants from surfactant solutions during surfactant-enhanced aquifer remediation. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.02.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Beauchamp DL, Khajehpour M. The effect of lithium ions on the hydrophobic effect: does lithium affect hydrophobicity differently than other ions? Biophys Chem 2012; 163-164:35-43. [DOI: 10.1016/j.bpc.2012.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Revised: 02/06/2012] [Accepted: 02/06/2012] [Indexed: 10/14/2022]
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Bauer BA, Ou S, Patel S. Role of spatial ionic distribution on the energetics of hydrophobic assembly and properties of the water/hydrophobe interface. Phys Chem Chem Phys 2012; 14:1892-906. [PMID: 22231014 DOI: 10.1039/c1cp20839j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We present results from all-atom molecular dynamics simulations of large-scale hydrophobic plates solvated in NaCl and NaI salt solutions. As observed in studies of ions at the air-water interface, the density of iodide near the water-plate interface is significantly enhanced relative to chloride and in the bulk. This allows for the partial hydration of iodide while chloride remains more fully hydrated. In 1 M solutions, iodide directly pushes the hydrophobes together (contributing -2.51 kcal mol(-1)) to the PMF. Chloride, however, strengthens the water-induced contribution to the PMF by ~-2.84 kcal mol(-1). These observations are enhanced in 3 M solutions, consistent with the increased ion density in the vicinity of the hydrophobes. The different salt solutions influence changes in the critical hydrophobe separation distance and characteristic wetting/dewetting transitions. These differences are largely influenced by the ion-specific expulsion of iodide from bulk water. Results of this study are of general interest to the study of ions at interfaces and may lend insight to the mechanisms underlying the Hofmeister series.
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Affiliation(s)
- Brad A Bauer
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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13
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Role of solvent accessible surface area in the conformational equilibrium of n-butane in liquids. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.12.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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