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Wang Q, Gao G, Fang F, Wang Q, Lundquist PK, Sun L. A simple and efficient approach for preparing cationic coating with tunable electroosmotic flow for capillary zone electrophoresis-mass spectrometry-based top-down proteomics. Anal Chim Acta 2024; 1328:343162. [PMID: 39266194 PMCID: PMC11404064 DOI: 10.1016/j.aca.2024.343162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/20/2024] [Accepted: 08/26/2024] [Indexed: 09/14/2024]
Abstract
BACKGROUND Capillary zone electrophoresis-tandem mass spectrometry (CZE-MS/MS) has become a valuable analytical technique in top-down proteomics (TDP). CZE-MS/MS-based TDP typically employs separation capillaries with neutral coatings (i.e., linear polyacrylamide, LPA). However, issues related to separation resolution and reproducibility remain with the LPA-coated capillaries due to the unavoidable non-specific protein adsorption onto the capillary wall. Cationic coatings can be critical alternatives to LPA coating for CZE-MS/MS-based TDP due to the electrostatic repulsion between the positively charged capillary inner wall and proteoform molecules in the acidic separation buffer. Unfortunately, there are only very few studies using cationic coating-based CZE-MS/MS for TDP studies. RESULTS In this work, we aimed to develop a simple and efficient approach for preparing separation capillaries with a cationic coating, i.e., poly (acrylamide-co-(3-acrylamidopropyl) trimethylammonium chloride [PAMAPTAC]) for CZE-MS/MS-based TDP. The PAMAPTAC coating-based CZE-MS produced significantly better separation resolution of proteoforms compared to the traditionally used LPA-coated approach. It achieved reproducible separation and measurement of a simple proteoform mixture and a complex proteome sample (i.e., a yeast cell lysate) regarding migration time, proteoform intensity, and the number of proteoform identifications. The PAMAPTAC coating-based CZE-MS enabled the detection of large proteoforms (≥30 kDa) from the yeast cell lysate reproducibly without any size-based prefractionation. Interestingly, the mobility of proteoforms using the PAMAPTAC coating can be predicted accurately using a simple semi-empirical model. SIGNIFICANCE The results render the PAMAPTAC coating as a valuable alternative to the LPA coating to advance CZE-MS-based TDP towards high-resolution separation and highly reproducible measurement of proteoforms in complex samples.
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Affiliation(s)
- Qianjie Wang
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI, 48824, USA; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA; Plant Resilience Institute, Michigan State University, East Lansing, MI, 48824, USA
| | - Guangyao Gao
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI, 48824, USA
| | - Fei Fang
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI, 48824, USA
| | - Qianyi Wang
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI, 48824, USA
| | - Peter K Lundquist
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA; Plant Resilience Institute, Michigan State University, East Lansing, MI, 48824, USA
| | - Liangliang Sun
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI, 48824, USA.
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2
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Hannibal VD, Greb L. Tetra-Amido Macrocyclic Ligand (TAML) at Silicon(IV): A Structurally Constrained, Water-Soluble Silicon Lewis Superacid. J Am Chem Soc 2024; 146:25727-25737. [PMID: 39223943 DOI: 10.1021/jacs.4c08015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Tetracoordinate silicon species are typically tetrahedral, weak Lewis acids, and often sensitive to moisture. In this study, we present a tetra-amido macrocyclic ligand (TAML)-substituted Si(IV), isolated as its bis(pyridine) adduct. Due to structural constraint toward anti van't-Hof/Le Bel geometry, this compound exhibits Lewis superacidity and effectively catalyzes the hydroboration of pyridine. Kinetic and computational analyses of the catalytic cycle reveal that TAML-Si(IV) acts as a hydride transfer agent, and the hydrido silicate key intermediate is isolated. Notably, the Lewis acid is highly soluble (5 g/L) and long-term stable in water. Unlike previously described silicon-H2O adducts, the bound water becomes substantially acidified, reaching the Bro̷nsted superacidity range. A comparison of water affinity versus pKa lowering confirms our previous theory of the strength and the effect of Lewis acids. Overall, the compound's unlimited water compatibility and its mechanistically understood catalytic efficiency mark significant progress in applying structural constraint strategies for p-block element-based catalysis, while the acidification touches critical aspects of zeolite and silica surface chemistry.
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Affiliation(s)
- Valentin D Hannibal
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, Heidelberg 69120, Germany
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, Heidelberg 69120, Germany
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3
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Qin S, Meng F, Jin F, Xu X, Zhao M, Chu H, Gao L, Liu S. Dual-functional porphyrinic zirconium-based metal-organic framework for the fluorescent sensing of histidine enantiomers and Hg 2. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2386-2399. [PMID: 38572640 DOI: 10.1039/d3ay02241b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
A novel fluorescence sensor based on a porphyrinic zirconium-based metal-organic framework, L-cysteine-modified PCN-222 (L-Cys/PCN-222), was developed to selectively recognize histidine enantiomers and sensitively detect Hg2+. The dual-functional sensor was successfully prepared via the solvent-assisted ligand incorporation method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), 1H nuclear magnetic resonance (1H NMR) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, circular dichroism (CD), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption analyses. L-Cys/PCN-222 not only showed a higher quenching response for L-histidine than that for D-histidine with a fast fluorescent response rate of <40 s but also exhibited low detection limits for L- and D-histidine (2.48 μmol L-1 and 3.85 μmol L-1, respectively). Moreover, L-Cys/PCN-222 was employed as a fluorescent and visual sensor for the highly sensitive detection of Hg2+ in the linear range of 10-500 μmol L-1, and the detection limit was calculated to be 2.79 μmol L-1 in surface water. The specific and selective recognition of chiral compounds and metal ions by our probe make it suitable for real field applications.
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Affiliation(s)
- Shili Qin
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
- Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar 161006, P. R. China
- Heilongjiang Industrial Hemp Processing Technology Innovation Center, Qiqihar 161006, P. R. China
| | - Fanshu Meng
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
| | - Fenglong Jin
- Qiqihar Inspection and Testing Center, Qiqihar Administration for Market Regulation, Qiqihar 161000, P.R. China
| | - Xidi Xu
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
| | - Ming Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
- Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar 161006, P. R. China
- Heilongjiang Industrial Hemp Processing Technology Innovation Center, Qiqihar 161006, P. R. China
| | - Hongtao Chu
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
- Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar 161006, P. R. China
- Heilongjiang Industrial Hemp Processing Technology Innovation Center, Qiqihar 161006, P. R. China
| | - Lidi Gao
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
- Technology Innovation Center of Industrial Hemp for State Market Regulation, Qiqihar 161006, P. R. China
- Heilongjiang Industrial Hemp Processing Technology Innovation Center, Qiqihar 161006, P. R. China
| | - Shuren Liu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310000, P. R. China.
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4
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Świętek M, Marková I, Malínská H, Hüttl M, Miklánková D, Černá K, Konefał R, Horák D. Tannic acid- and N-acetylcysteine-chitosan-modified magnetic nanoparticles reduce hepatic oxidative stress in prediabetic rats. Colloids Surf B Biointerfaces 2024; 235:113791. [PMID: 38335769 DOI: 10.1016/j.colsurfb.2024.113791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
Magnetic nanoparticles (MNPs) modified with tannic acid (TA) have shown remarkable success as an antioxidant and antimicrobial therapeutic agent. Herein, we report a synthetic procedure for the preparation of silica-coated MNPs modified with N-acetylcysteine-modified chitosan and TA. This was achieved by free-radical grafting of NAC onto chitosan (CS), a layer-by-layer technique for modifying negatively charged MNP@SiO2 nanoparticles with positively charged CS-NAC, and crosslinking CS with TA. The antioxidant and metabolic effects of MNP@SiO2-CS-NAC and MNP@SiO2-CS-NAC-TA nanoparticles were tested in a model of prediabetic rats with hepatic steatosis, the hereditary hypertriglyceridemic rats (HHTg). The particles exhibited significant antioxidant properties in the liver, increasing the activity of the antioxidant enzymes superoxide dismutase (SOD), glutathione reductase (GR) and glutathione peroxidase (GPx), decreasing the concentration of the lipoperoxidation product malondialdehyde (MDA), and improving the antioxidant status determined as the ratio of reduced to oxidized glutathione; in particular, TA increased some antioxidant parameters. MNPs carrying antioxidants such as NAC and TA could thus represent a promising therapeutic agent for the treatment of various diseases accompanied by increased oxidative stress.
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Affiliation(s)
- Małgorzata Świętek
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského Nám. 2, 162 00 Prague 6, Czech Republic
| | - Irena Marková
- Institute for Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Prague 4, Czech Republic
| | - Hana Malínská
- Institute for Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Prague 4, Czech Republic
| | - Martina Hüttl
- Institute for Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Prague 4, Czech Republic
| | - Denisa Miklánková
- Institute for Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Prague 4, Czech Republic
| | - Kristýna Černá
- Institute for Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Prague 4, Czech Republic
| | - Rafał Konefał
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského Nám. 2, 162 00 Prague 6, Czech Republic
| | - Daniel Horák
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského Nám. 2, 162 00 Prague 6, Czech Republic.
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5
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Giefer P, Bäther S, Kaufmes N, Kieserling H, Heyse A, Wagemans W, Barthel L, Meyer V, Schneck E, Fritsching U, Wagemans AM. Characterization of β-lactoglobulin adsorption on silica membrane pore surfaces and its impact on membrane emulsification processes. J Colloid Interface Sci 2023; 652:1074-1084. [PMID: 37647716 DOI: 10.1016/j.jcis.2023.08.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/21/2023] [Accepted: 08/16/2023] [Indexed: 09/01/2023]
Abstract
Protein adsorption plays a key role in membrane fouling in liquid processing, but the specific underlying molecular mechanisms of β-lactoglobulin adsorption on ceramic silica surfaces in premix membrane emulsification have not been investigated yet. In this study, we aimed to elucidate the β-lactoglobulin adsorption and its effect on the premix membrane emulsification of β-lactoglobulin-stabilized oil-in-water emulsions. In particular, the conformation, molecular interactions, layer thickness, surface energy of the adsorbed β-lactoglobulin and resulting droplet size distribution are investigated in relation to the solvent properties (aggregation state of β-lactoglobulin) and the treatment of the silica surface (hydrophilization). The β-lactoglobulin adsorption is driven by attractive electrostatic interactions between positively charged amino acid residues, i.e., lysin and negatively charged silanol groups, and is stabilized by hydrophobic interactions. The strong negative charges of the treated silica surfaces result in a high apparent layer thickness of β-lactoglobulin. Although the conformation of the adsorbed β-lactoglobulin layer varies with membrane treatment and the solvent properties, the β-lactoglobulin adsorption offsets the effect of hydrophilization of the membrane so that the surface energies after β-lactoglobulin adsorption are comparable. The resulting droplet size distribution of oil-in-water emulsions produced by premix membrane emulsification are similar for treated and untreated silica surfaces.
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Affiliation(s)
- Patrick Giefer
- Leibniz Institute for Materials Engineering-IWT, Badgasteiner Straße 3, 28359 Bremen, Germany; University of Bremen, Particles and Process Engineering, Bibliothekstraße 1, 28359 Bremen, Germany
| | - Sabrina Bäther
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Biosciences, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Nadine Kaufmes
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Biosciences, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Helena Kieserling
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Biosciences, Straße des 17. Juni 135, 10623 Berlin, Germany; Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Chemistry and Analysis, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Anja Heyse
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Technology and Food Material Science, Straße des 17. Juni 135, 10623 Berlin, Germany
| | | | - Lars Barthel
- Technische Universität Berlin, Institute of Biotechnology, Department of Applied and Molecular Microbiology, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Vera Meyer
- Technische Universität Berlin, Institute of Biotechnology, Department of Applied and Molecular Microbiology, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Emanuel Schneck
- Technical University of Darmstadt, Department of Physics, 64277 Darmstadt, Germany
| | - Udo Fritsching
- Leibniz Institute for Materials Engineering-IWT, Badgasteiner Straße 3, 28359 Bremen, Germany; University of Bremen, Particles and Process Engineering, Bibliothekstraße 1, 28359 Bremen, Germany
| | - Anja Maria Wagemans
- Technische Universität Berlin, Institute of Food Technology and Food Chemistry, Department of Food Biosciences, Straße des 17. Juni 135, 10623 Berlin, Germany.
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6
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Russo B, Piacentini E, Bazzarelli F, Calderoni G, Vacca P, Figoli A, Giorno L. Scalable production of chitosan sub-micron particles by membrane ionotropic gelation process. Carbohydr Polym 2023; 318:121125. [PMID: 37479456 DOI: 10.1016/j.carbpol.2023.121125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/07/2023] [Accepted: 06/14/2023] [Indexed: 07/23/2023]
Abstract
Ionotropic gelation (IG) is a highly attractive method for the synthesis of natural water-soluble polymeric nanoparticles (NPs) and sub-micron particles (sMP) due to its relatively simple procedure and the absence of organic solvents. The method involves the electrostatic interaction between two ionic species of opposite charge. Although it is well studied at the laboratory scale, the difficulty to achieve size control in conventional bench-top process is actually a critical aspect of the technology. The aim of this work is to study the membrane dispersion technology in combination with IG as a suitable scalable method for the production of chitosan sub-micron particles (CS-sMPs). The two phases, one containing chitosan (CS) and the other containing sodium tripolyphosphate (TPP), were put in contact using a tubular hydrophobic glass membrane with a pore diameter of 1 μm. TPP (dispersed phase) was permeated through the membrane pores into the lumen side along which the CS solution (the continuous phase) flowed in batch recirculation or continuous single-pass operation mode. The influence of chemical variables (i.e. pH, concentration and mass ratio of polyelectrolyte species, emulsifier) and fluid-dynamic parameters (i.e. polyelectrolyte solution flow rate and their relative mass ratio) was studied to precisely tune the size of CS-Ps.
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Affiliation(s)
- Beatrice Russo
- Institute on Membrane Technology (CNR-ITM), Via P. Bucci 17/c, 87036 Rende, CS, Italy
| | - Emma Piacentini
- Institute on Membrane Technology (CNR-ITM), Via P. Bucci 17/c, 87036 Rende, CS, Italy.
| | - Fabio Bazzarelli
- Institute on Membrane Technology (CNR-ITM), Via P. Bucci 17/c, 87036 Rende, CS, Italy
| | - Gabriele Calderoni
- SAES Getters S.p.A., Group Research Labs, Viale Italia 77, 20045 Lainate, MI, Italy
| | - Paolo Vacca
- SAES Getters S.p.A., Group Research Labs, Viale Italia 77, 20045 Lainate, MI, Italy
| | - Alberto Figoli
- Institute on Membrane Technology (CNR-ITM), Via P. Bucci 17/c, 87036 Rende, CS, Italy
| | - Lidietta Giorno
- Institute on Membrane Technology (CNR-ITM), Via P. Bucci 17/c, 87036 Rende, CS, Italy
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7
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Jara Fornerod M, Alvarez-Fernandez A, Michalska M, Papakonstantinou I, Guldin S. Glucose Oxidase Loading in Ordered Porous Aluminosilicates: Exploring the Potential of Surface Modification for Electrochemical Glucose Sensing. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:7577-7587. [PMID: 37780408 PMCID: PMC10536975 DOI: 10.1021/acs.chemmater.3c01202] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/22/2023] [Indexed: 10/03/2023]
Abstract
Enzymatic electrochemical sensors have become the leading glucose detection technology due to their rapid response, affordability, portability, selectivity, and sensitivity. However, the performance of these sensors is highly dependent on the surface properties of the electrode material used to store glucose oxidase and its ability to retain enzymatic activity under variable environmental conditions. Mesoporous thin films have recently attracted considerable attention as promising candidates for enzyme storage and activity preservation due to their well-defined nanoarchitecture and tunable surface properties. Herein, we systematically compare pathways for the immobilization of glucose oxidase (GOx) and their effectiveness in electrochemical glucose sensing, following modification protocols that lead to the electrostatic attraction (amino functionalization), covalent bonding (aldehyde functionalization), and electrostatic repulsion (oxygen plasma treatment) of the ordered porous aluminosilicate-coated electrodes. By direct comparison using a quartz crystal microbalance, we demonstrate that glucose oxidase can be loaded in a nanoarchitecture with a pore size of ∼50 nm and pore interconnections of ∼35 nm using the native aluminosilicate surface, as well as after amino or aldehyde surface modification, while oxygen plasma exposure of the native surface inhibits glucose oxidase loading. Despite a variety of routes for enzyme loading, quantitative electrochemical glucose sensing between 0 and 20 mM was only possible when the porous surface was functionalized with amino groups, which we relate to the role of surface chemistry in accessing the underlying substrate. Our results highlight the impact of rational surface modification on electrochemical biosensing performance and demonstrate the potential of tailoring porous nanoarchitecture surfaces for biosensing applications.
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Affiliation(s)
| | - Alberto Alvarez-Fernandez
- Department
of Chemical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
| | - Martyna Michalska
- Department
of Electronic & Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K.
| | - Ioannis Papakonstantinou
- Department
of Electronic & Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K.
| | - Stefan Guldin
- Department
of Chemical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
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8
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Cohen N, Shamir D, Kornweitz H, Albo Y, Burg A. Dual Role of Silicon-based Matrices in Electron Exchange Matrices for Waste Treatment. Chemphyschem 2023; 24:e202300130. [PMID: 37497826 DOI: 10.1002/cphc.202300130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/27/2023] [Indexed: 07/28/2023]
Abstract
Para chloro aniline (PCA) is a common toxic pollutant found in pharmaceutical wastewater. Our study suggests a novel PCA treatment method based on a heterogeneous advanced oxidation process (AOP) that proceeds in an electron exchange matrix (EEM) prepared by the incorporation of redox-active specie in silica matrices using the sol-gel synthesis route. The results, which are supported by DFT calculations, show that the silicon skeleton of the EEM has two important roles, both as a porous matrix that hosts the redox species and as an oxidant species involved in the AOP. The calculations indicate that the formation of a radical on the nitrogen is favored. The suggested mechanism could shed light on the AOP, which proceeds in a heterogenous system, and on its application inside the understudied EEMs that, until now, have been a virtual black box. A better understanding of the mechanism could lead to improved control over the heterogeneous processes that can play a critical role in industries with the need to treat small amounts of toxic compounds at low concentrations, such as in the pharmaceutical industry.
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Affiliation(s)
- Noy Cohen
- Department of Chemical Engineering, Sami Shamoon College of Engineering, Beer-Sheva, Israel
| | - Dror Shamir
- Analytical Chemistry Department, NRCN, Beer-Sheva, Israel
| | - Haya Kornweitz
- Chemical Sciences Department, Ariel University, Ariel, Israel
| | - Yael Albo
- Chemical Engineering Department, Ariel University, Ariel, Israel
| | - Ariela Burg
- Department of Chemical Engineering, Sami Shamoon College of Engineering, Beer-Sheva, Israel
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9
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Zannotti M, Rossi A, Minicucci M, Ferraro S, Petetta L, Giovannetti R. Water Decontamination from Cr(VI) by Transparent Silica Xerogel Monolith. Int J Mol Sci 2023; 24:ijms24087430. [PMID: 37108592 PMCID: PMC10138445 DOI: 10.3390/ijms24087430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/12/2023] [Accepted: 04/16/2023] [Indexed: 04/29/2023] Open
Abstract
Cr(VI) is highly soluble and mobile in water solution and extremely toxic. In order to obtain a specific material with adsorption properties towards Cr(VI), and that can be used in environmental remediation of water contaminated with Cr(VI), one-step sol-gel technique, at low temperature (50 °C), has been optimized to prepare transparent silica-based xerogel monolith by using tetraethyl orthosilicate as precursor. The obtained xerogel, with disk shape, was fully characterized by Raman, BET, FE-SEM and XRD analysis. The results indicated that the material showed silica amorphous phase and high porosity. The study of the adsorption properties towards different concentrations of Cr(VI), in the form of HCrO4- in acidic condition, showed prominent results. The absorption kinetics were evaluated by studying different models, the final result showing that the absorption of Cr(VI) occurred through intra-particle diffusion process, following two steps, and that the absorption equilibrium is regulated by Freundlich isotherm model. The material can be restored by reducing the hazardous Cr(VI) to Cr(III), a less toxic form of chromium, by 1,5-diphenylcarbazide, and with successive treatment in acidic water.
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Affiliation(s)
- Marco Zannotti
- Chemistry Interdisciplinary Project, School of Science and Technology, Chemistry Division, University of Camerino, 62032 Camerino, Italy
| | - Andrea Rossi
- Chemistry Interdisciplinary Project, School of Science and Technology, Chemistry Division, University of Camerino, 62032 Camerino, Italy
| | - Marco Minicucci
- School of Science and Technology, Physics Division, University of Camerino, 62032 Camerino, Italy
| | - Stefano Ferraro
- Chemistry Interdisciplinary Project, School of Science and Technology, Chemistry Division, University of Camerino, 62032 Camerino, Italy
| | - Laura Petetta
- Chemistry Interdisciplinary Project, School of Science and Technology, Chemistry Division, University of Camerino, 62032 Camerino, Italy
| | - Rita Giovannetti
- Chemistry Interdisciplinary Project, School of Science and Technology, Chemistry Division, University of Camerino, 62032 Camerino, Italy
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10
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Miadonye A, Irwin DJG, Amadu M. Effect of Polar Hydrocarbon Contents on Oil-Water Interfacial Tension and Implications for Recent Observations in Smart Water Flooding Oil Recovery Schemes. ACS OMEGA 2023; 8:9086-9100. [PMID: 36936321 PMCID: PMC10018506 DOI: 10.1021/acsomega.2c04698] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/07/2022] [Indexed: 06/18/2023]
Abstract
For decades now, low salinity water flooding (LSWF) oil recovery has emerged as an environmentally benign and cost-effective method for improved oil recovery, where research findings have reported pH and interfacial tension effects. Considering the effect of oil chemistry on interfacial tension and the potential of this chemistry to have a direct relationship with LSWF, we measured the interfacial tension of four crude oils with composition varying from those of conventional to unconventional ones. We also characterized the crude oil samples using infrared spectroscopy and a wet chemistry method based on asphaltene precipitation. Our research approach has enabled us to relate the composition of crude oil to the interfacial tension trend at pH encountered in improved oil recovery schemes. Our research methodology, based on an integrated approach to using infrared spectroscopy and interfacial tensiometry, has also enabled us to propose a more robust theoretical explanation for current observations in LSWF related to pH and interfacial tension. In this regard, oil-water interfacial tension depends on the concentration of polar components, such that the higher the concentration of polar groups in crude oil, the higher the interfacial tension at a given pH of aqueous solution. We have also shown that the acid-base behavior of polar groups at the oil-water interface provides a theoretical interpretation of the explicit relationship between oil-water interfacial tension and the electrostatic components of interfacial tension as given by the energy additivity theory.
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Affiliation(s)
- Adango Miadonye
- Department
of Chemistry, School of Science and Technology,
Cape Breton University, Sydney NS B1M 1A2, Canada
| | - David J. G. Irwin
- Department
of Mathematics, Physics, and Geology, School
of Science and Technology, Cape Breton University, Sydney NS B1M 1A2, Canada
| | - Mumuni Amadu
- Department
of Chemistry, School of Science and Technology,
Cape Breton University, Sydney NS B1M 1A2, Canada
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11
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Wang H, Wang C, Liu L, Zhao H. Synthesis of Polymer Brushes and Removable Surface Nanostructures on Tannic Acid Coatings. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- Huan Wang
- College of Chemistry and Key Laboratory of Functional Polymer Materials of the Ministry of Education, Nankai University, Tianjin 300071, China
| | - Chen Wang
- College of Chemistry and Key Laboratory of Functional Polymer Materials of the Ministry of Education, Nankai University, Tianjin 300071, China
| | - Li Liu
- College of Chemistry and Key Laboratory of Functional Polymer Materials of the Ministry of Education, Nankai University, Tianjin 300071, China
| | - Hanying Zhao
- College of Chemistry and Key Laboratory of Functional Polymer Materials of the Ministry of Education, Nankai University, Tianjin 300071, China
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12
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Juzsakova T, Salman AD, Abdullah TA, Rasheed RT, Zsirka B, Al-Shaikhly RR, Sluser B, Cretescu I. Removal of Methylene Blue from Aqueous Solution by Mixture of Reused Silica Gel Desiccant and Natural Sand or Eggshell Waste. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1618. [PMID: 36837246 PMCID: PMC9965102 DOI: 10.3390/ma16041618] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
The purpose of this work was to develop, characterize and test new low-cost materials suitable for removing methylene blue dye from water and wastewater by adsorption. The solid materials consisted of silica gel powder (SG), silica gel mixed with eggshell powder (SG-ES) and a mixture of silica gel with sand from the western Iraqi desert (SG-SI). The samples were milled by using an electrical mixer and a ball mill, followed by a drying step. In addition, desert sand was acid-treated in order to remove impurities. The structure and chemical composition of the samples were investigated by X-ray diffraction (XRD), a scanning electron microscopy technique equipped with an energy-dispersive X-ray spectrometer (SEM-EDX), a low-temperature nitrogen adsorption (BET) technique, thermo-analytical (TG/TGA) measurements and Fourier-transformed infrared spectroscopy (FTIR). The previously mentioned materials were tested to remove methylene blue from an aqueous solution. The adsorption experiments were monitored by ultraviolet-visible (UV-Vis) spectrophotometry and showed that SG and SG-ES gave promising results for the methylene blue removal from water. After 40 min of treatment of the aqueous solution containing 10 mg/L of MB at room temperature, the tested SG, SG-ES and SG-SI materials were found to have 86%, 80% and 57% dye adsorption efficiency, respectively. Taking into consideration not only the adsorption activity of the studied material but their availability, cost and concepts of cleaner production and waste minimization, the developed silica gel with eggshell can be considered as a good, cost-effective alternative to commercially available activated-carbon-based adsorbents. Different kinetic and isotherm models were fitted to the experimental results. A pseudo-second-kinetics-order model revealed high correlation fitting, while the Freundlich model was found to appropriately describe the adsorption isotherm. The thermal stability during the possible regeneration process of the SG-ES adsorbent mixture and its interaction mechanism with cationic dye was discussed.
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Affiliation(s)
- Tatjana Juzsakova
- Sustainability Solutions Research Lab, Research Centre for Biochemical, Environmental and Chemical Engineering, Faculty of Engineering, University of Pannonia, P.O. Box 158, H-8201 Veszprem, Hungary
| | - Ali Dawood Salman
- Department of Chemical and Petroleum Refining Engineering, College of Oil and Gas Engineering, Basra University for Oil and Gas, Basra 61004, Iraq
| | - Thamer Adnan Abdullah
- Chemistry Branch, Applied Sciences Department, University of Technology, Baghdad 10070, Iraq
| | - Rashed Taleb Rasheed
- Chemistry Branch, Applied Sciences Department, University of Technology, Baghdad 10070, Iraq
| | - Balázs Zsirka
- Research Group of Analytical Chemistry/Laboratory for Surfaces and Nanostructures, Center for Natural Sciences, University of Pannonia, P.O. Box 158, H-8201 Veszprem, Hungary
| | - Rasha R. Al-Shaikhly
- Department of Prosthetic Dental Technology, Faculty of Health and Medical Technology, Al-Farahidi University, Al-Jadiriyah Bridge, Baghdad 10070, Iraq
| | - Brindusa Sluser
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73, Blvd. D. Mangeron, 700050 Iasi, Romania
| | - Igor Cretescu
- Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73, Blvd. D. Mangeron, 700050 Iasi, Romania
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13
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Heterogenous bipolar membrane with amino methyl phosphonic acid functionalized cation exchange layer and montmorillonite nanoclay based interfacial layer. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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14
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Ritt CL, de Souza JP, Barsukov MG, Yosinski S, Bazant MZ, Reed MA, Elimelech M. Thermodynamics of Charge Regulation during Ion Transport through Silica Nanochannels. ACS NANO 2022; 16:15249-15260. [PMID: 36075111 DOI: 10.1021/acsnano.2c06633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ion-surface interactions can alter the properties of nanopores and dictate nanofluidic transport in engineered and biological systems central to the water-energy nexus. The ion adsorption process, known as "charge regulation", is ion-specific and is dependent on the extent of confinement when the electric double layers (EDLs) between two charged surfaces overlap. A fundamental understanding of the mechanisms behind charge regulation remains lacking. Herein, we study the thermodynamics of charge regulation reactions in 20 nm SiO2 channels via conductance measurements at various concentrations and temperatures. The effective activation energies (Ea) for ion conductance at low concentrations (strong EDL overlap) are ∼2-fold higher than at high concentrations (no EDL overlap) for the electrolytes studied here: LiCl, NaCl, KCl, and CsCl. We find that Ea values measured at high concentrations result from the temperature dependence of viscosity and its influence on ion mobility, whereas Ea values measured at low concentrations result from the combined effects of ion mobility and the enthalpy of cation adsorption to the charged surface. Notably, the Ea for surface reactions increases from 7.03 kJ mol-1 for NaCl to 16.72 ± 0.48 kJ mol-1 for KCl, corresponding to a difference in surface charge of -8.2 to -0.8 mC m-2, respectively. We construct a charge regulation model to rationalize the cation-specific charge regulation behavior based on an adsorption equilibrium. Our findings show that temperature- and concentration-dependent conductance measurements can help indirectly probe the ion-surface interactions that govern transport and colloidal interactions at the nanoscale─representing a critical step forward in our understanding of charge regulation and adsorption phenomena under nanoconfinement.
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Affiliation(s)
- Cody L Ritt
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - J Pedro de Souza
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Michelle G Barsukov
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Shari Yosinski
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Martin Z Bazant
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mark A Reed
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
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15
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Potential of montmorillonite nanoclay as water dissociation catalyst at the interface of bipolar membrane. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Luciane Effting, Alesandro Bail. The “Plus” of the Outer Surface of a Magnetic Layered Double Hydroxide for Arsenic Removal from Water: Synthesis and Adsorption Aspects. J WATER CHEM TECHNO+ 2022. [DOI: 10.3103/s1063455x22040063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Zekkari M, Ouargli-Saker R, Boudissa F, Lachachi AK, El Houda Sekkal KN, Tayeb R, Boukoussa B, Azzouz A. Silica-catalyzed ozonation of 17α -ethinyl-estradiol in aqueous media-to better understand the role of silica in soils. CHEMOSPHERE 2022; 298:134312. [PMID: 35304212 DOI: 10.1016/j.chemosphere.2022.134312] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 02/08/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
A promising route for thorough removal of 17α-ethinyl estradiol (EE2) from aqueous media was achieved through ozonation using mesoporous silicas such SBA-15, SBA-16, MCM-41 and MCM-48 as catalysts. Comparison with aluminosilicates along with Zeta potential and particle size measurements allowed demonstrating that EE2 interaction with silanols and hydrophobic -Si-O-Si- groups are essential requirements for the catalytic activity. Acid-base interactions, if any, should have minor contribution. EE2 hydroxylation appears to be an early step in the ozonation on all catalysts, but MCM-41 showed increased activity in phenolic ring cleavage. Confrontation of HPLC-UV and UV-Vis and HPLC-UV measurements revealed highest catalytic activity for MCM-41 and to a lesser extend of MCM-48 due to their higher specific surface area and weaker acid character. These results provide valuable findings for judiciously tailoring optimum [EE2-Silica:Water] interactions for thorough oxidative degradation of endocrine disrupting compounds (EDC).
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Affiliation(s)
- Meriem Zekkari
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, H3C3P8, Canada; Laboratoire des Sciences, Technologie et Génie des Procédés, Université des Sciences et de La Technologie D'Oran Mohamed Boudiaf, El M'naouer, BP, 1505, Oran, Algeria
| | - Rachida Ouargli-Saker
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, H3C3P8, Canada; Laboratoire des Sciences, Technologie et Génie des Procédés, Université des Sciences et de La Technologie D'Oran Mohamed Boudiaf, El M'naouer, BP, 1505, Oran, Algeria
| | - Farida Boudissa
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, H3C3P8, Canada
| | - Asma Kawther Lachachi
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, H3C3P8, Canada; Laboratoire des Sciences, Technologie et Génie des Procédés, Université des Sciences et de La Technologie D'Oran Mohamed Boudiaf, El M'naouer, BP, 1505, Oran, Algeria
| | - Kawter Nor El Houda Sekkal
- Laboratoire des Sciences, Technologie et Génie des Procédés, Université des Sciences et de La Technologie D'Oran Mohamed Boudiaf, El M'naouer, BP, 1505, Oran, Algeria
| | - Rachida Tayeb
- Laboratoire des Sciences, Technologie et Génie des Procédés, Université des Sciences et de La Technologie D'Oran Mohamed Boudiaf, El M'naouer, BP, 1505, Oran, Algeria
| | - Bouhadjar Boukoussa
- Département de Génie des Matériaux, Faculté de Chimie, Université des Sciences et de La Technologie Mohamed Boudiaf, El-Mnaouer, BP, 1505, Oran, Algeria
| | - Abdelkrim Azzouz
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, H3C3P8, Canada; École de Technologie Supérieure, Montréal, Québec, H3C 1K3, Canada.
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18
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Walker-Gibbons R, Kubincová A, Hünenberger PH, Krishnan M. The Role of Surface Chemistry in the Orientational Behavior of Water at an Interface. J Phys Chem B 2022; 126:4697-4710. [PMID: 35726865 PMCID: PMC9251758 DOI: 10.1021/acs.jpcb.2c01752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/18/2022] [Indexed: 11/30/2022]
Abstract
Molecular dynamics studies have demonstrated that molecular water at an interface, with either a gas or a solid, displays anisotropic orientational behavior in contrast to its bulk counterpart. This effect has been recently implicated in the like-charge attraction problem for colloidal particles in solution. Here, negatively charged particles in solution display a long-ranged attraction where continuum electrostatic theory predicts monotonically repulsive interactions, particularly in solutions with monovalent salt ions at low ionic strength. Anisotropic orientational behavior of solvent molecules at an interface gives rise to an excess interfacial electrical potential which we suggest generates an additional solvation contribution to the total free energy that is traditionally overlooked in continuum descriptions of interparticle interactions in solution. In the present investigation we perform molecular dynamics simulation based calculations of the interfacial potential using realistic surface models representing various chemistries as well as different solvents. Similar to previous work that focused on simple model surfaces constructed by using oxygen atoms, we find that solvents at more realistic model surfaces exhibit substantial anisotropic orientational behavior. We explore the dependence of the interfacial solvation potential on surface properties such as surface group chemistry and group density at silica and carboxylated polystyrene interfaces. For water, we note surprisingly good agreement between results obtained for a simple O-atom wall and more complex surface models, suggesting a general qualitative consistency of the interfacial solvation effect for surfaces in contact with water. In contrast, for an aprotic solvent such as DMSO, surface chemistry appears to exert a stronger influence on the sign and magnitude of the interfacial solvation potential. The study carries broad implications for molecular-scale interactions and may find relevance in explaining a range of phenomena in soft-matter physics and cell biology.
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Affiliation(s)
- Rowan Walker-Gibbons
- Physical
& Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Alžbeta Kubincová
- Laboratory
of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Philippe H. Hünenberger
- Laboratory
of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Madhavi Krishnan
- Physical
& Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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19
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Shili QIN, Xudong HE, Fenglong JIN, Ying WANG, Hongtao CHU, Shuang HAN, Yangyang SUN, Lidi GAO. A facile imine-linked covalent organic framework doped with a carbon dot composite for the detection and removal of Hg 2+ in surface water. RSC Adv 2022; 12:18784-18793. [PMID: 35873319 PMCID: PMC9237831 DOI: 10.1039/d2ra01236g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
Hg2+ is one of the most toxic chemical species in the water environment, and thus developing a new fluorescent covalent organic framework for both the detection and removal of Hg2+ is highly desirable. Herein, a fluorescent composite, termed TpPa-1 COF@CDs, was synthesized by inverse emulsion polymerization method using an imine covalent organic framework as the supporting material and carbon dots as the fluorescent sensor element. The crystallinity, porosity, rich functional receptors (hydroxyl and amino groups), thermal stability and fluorescent properties of TpPa-1 COF@CDs were characterized. The results showed that TpPa-1 COF@CDs exhibited a good detection and removal performance for Hg2+, which was evidenced by its high sensitivity (LOD = 0.75 μg L-1), superior selectivity, large adsorption capacity (235 mg g-1), fast adsorption rate (30 min equilibrium time) and good regeneration (at least five cycles). More importantly, the simple functional monomer, short reaction time and metal-free raw material made TpPa-1 COF@CDs reliable, cost effective and eco-friendly. This research demonstrated the facile construction of a functional covalent organic framework composite for water environmental remediation technologies of metal pollution.
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Affiliation(s)
- Q I N Shili
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - H E Xudong
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - J I N Fenglong
- Center of Inspection and Testing, Qiqihar Administration for Market Regulation Qiqihar Heilongjiang 161006 P. R. China +86 0452 2738214
| | - W A N G Ying
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - C H U Hongtao
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - H A N Shuang
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - S U N Yangyang
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
| | - G A O Lidi
- College of Chemistry and Chemical Engineering, Qiqihar University Qiqihar Heilongjiang 161006 P. R. China
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20
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Świętek M, Ma YH, Wu NP, Paruzel A, Tokarz W, Horák D. Tannic Acid Coating Augments Glioblastoma Cellular Uptake of Magnetic Nanoparticles with Antioxidant Effects. NANOMATERIALS 2022; 12:nano12081310. [PMID: 35458018 PMCID: PMC9028780 DOI: 10.3390/nano12081310] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 02/02/2023]
Abstract
Coating of nanoparticles with gallates renders them antioxidant and enhances cellular internalization. In this study, (amino)silica magnetic particles modified with tannic acid (TA) and optionally with chitosan (CS) were developed, and their physicochemical properties and antioxidant activity were evaluated. The results demonstrated that the TA-modified aminosilica-coated particles, as well as the silica-coated particles with a double TA layer, exhibited high antioxidant activity, whereas the silica-coated particles with no or only a single TA layer were well-internalized by LN-229 cells. In addition, a magnet placed under the culture plates greatly increased the cellular uptake of all TA-coated magnetic nanoparticles. The coating thus had a considerable impact on nanoparticle–cell interactions and particle internalization. The TA-coated magnetic nanoparticles have great potential as intracellular carriers with preserved antioxidant activity.
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Affiliation(s)
- Małgorzata Świętek
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic; (M.Ś.); (A.P.)
| | - Yunn-Hwa Ma
- Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Guishan, Taoyuan 33302, Taiwan; (Y.-H.M.); (N.-P.W.)
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Linkou 33305, Taiwan
| | - Nian-Ping Wu
- Department of Physiology and Pharmacology, College of Medicine, Chang Gung University, Guishan, Taoyuan 33302, Taiwan; (Y.-H.M.); (N.-P.W.)
| | - Aleksandra Paruzel
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic; (M.Ś.); (A.P.)
| | - Waldemar Tokarz
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland;
| | - Daniel Horák
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic; (M.Ś.); (A.P.)
- Correspondence:
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21
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Comparative effects of zinc oxide nanoparticles over the interfacial properties of low concentrations of ionic surfactants at interfaces. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Döpke MF, Westerbaan van der Meij F, Coasne B, Hartkamp R. Surface Protolysis and Its Kinetics Impact the Electrical Double Layer. PHYSICAL REVIEW LETTERS 2022; 128:056001. [PMID: 35179914 DOI: 10.1103/physrevlett.128.056001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/08/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Surface conductivity in the electrical double layer (EDL) is known to be affected by proton hopping and diffusion at solid-liquid interfaces. Yet, the role of surface protolysis and its kinetics on the thermodynamic and transport properties of the EDL are usually ignored as physical models consider static surfaces. Here, using a novel molecular dynamics method mimicking surface protolysis, we unveil the impact of such chemical events on the system's response. Protolysis is found to strongly affect the EDL and electrokinetic aspects with major changes in ζ potential and electro-osmotic flow.
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Affiliation(s)
- Max F Döpke
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, Netherlands
| | | | - Benoit Coasne
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Remco Hartkamp
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, Netherlands
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23
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Wang B, Li L. Effect of Solid Substrates on the Molecular Structure of Ionic Liquid Nanofilms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14753-14759. [PMID: 34878792 DOI: 10.1021/acs.langmuir.1c02722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fundamental understandings of the interfacial molecular structure of solid-confined ionic liquids (ILs) have significant impacts on the development of many cutting-edge applications. Among the extensive studies on the molecular structure at the IL/solid interface, direct observation of a double-layering quantized growth of [Cnmim][FAP] on mica was recently reported. In the current work, the atomic force microscopy (AFM) results directly show that the growths of [Bmim][FAP] nanofilms on silica and amorphous carbon are different from the double-layering growth on mica. The growth of [Bmim][FAP] nanofilms on silica is dominated by the aggregation of the IL molecules, which can be attributed to the inadequate negative charging of the silica surface resulting in a weak electrostatic interaction between silica and the IL cation. [Bmim][FAP] on amorphous carbon shows a fairly smooth film for the thinner nanofilms, which can be attributed to the π-π+ parallel stacking between the cation imidazolium ring and the randomly distributed sp2 carbon on the amorphous carbon surface. Our findings highlight the effect of different IL/solid interactions, among the several competing interactions at the interface, on the resulting molecular arrangements of various IL.
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Affiliation(s)
- Bingchen Wang
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Lei Li
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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24
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Robinson N, May EF, Johns ML. Low-Field Functional Group Resolved Nuclear Spin Relaxation in Mesoporous Silica. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54476-54485. [PMID: 34743514 DOI: 10.1021/acsami.1c13934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Solid-fluid interactions underpin the efficacy of functional porous materials across a diverse array of chemical reaction and separation processes. However, detailed characterization of interfacial phenomena within such systems is hampered by their optically opaque nature. Motivated by the need to bridge this capability gap, we report low-magnetic-field two-dimensional (2D) 1H nuclear spin relaxation measurements as a noninvasive probe of adsorbate identity and interfacial dynamics, exploring the relaxation characteristics exhibited by liquid hydrocarbon adsorbates confined to a model mesoporous silica. For the first time, we demonstrate the capacity of this approach in distinguishing functional group-specific relaxation phenomena across a diverse range of alcohols and carboxylic acids employed as solvents, reagents, and liquid hydrogen carriers, with distinct relaxation responses assigned to the alkyl and hydroxyl moieties of each confined liquid. Uniquely, this relaxation behavior is shown to correlate with adsorbate acidity, with the observed relationship rationalized on the basis of surface-adsorbate proton-exchange dynamics. Our results demonstrate that nuclear spin relaxation provides a molecular-level perspective on sorbent/sorbate interactions, motivating the exploration of such measurements as a unique probe of adsorbate identity within optically opaque porous media.
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Affiliation(s)
- Neil Robinson
- Department of Chemical Engineering, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Eric F May
- Department of Chemical Engineering, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Michael L Johns
- Department of Chemical Engineering, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
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25
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Paixão MVG, da Silva Fernandes R, de Souza EA, de Carvalho Balaban R. Thermal energy storage technology to control rheological properties of drilling fluid. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116931] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Maiyelvaganan KR, Kamalakannan S, Shanmugan S, Prakash M, Coudert FX, Hochlaf M. Identification of a Grotthuss proton hopping mechanism at protonated polyhedral oligomeric silsesquioxane (POSS) - water interface. J Colloid Interface Sci 2021; 605:701-709. [PMID: 34365306 DOI: 10.1016/j.jcis.2021.07.115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/18/2021] [Accepted: 07/21/2021] [Indexed: 11/19/2022]
Abstract
The attachment and dissociation of a proton from a water molecule and the proton transfers at solid-liquid interfaces play vital roles in numerous biological, chemical processes and for the development of sustainable functional materials for energy harvesting and conversion applications. Using first-principles computational methodologies, we investigated the protonated forms of polyhedral oligomeric silsesquioxane (POSS-H+) interacting with water clusters (Wn, where n = 1-6) as a model to quantify the proton conducting and localization ability at solid-liquid interfaces. Successive addition of explicit water molecules to POSS-H+ shows that the assistance of at least three water molecules is required to dissociate the proton from POSS with the formation of an Eigen cation (H9O4+), whereas the presence of a fourth water molecule highly favors the formation of a Zundel ion (H5O2+). Reaction pathway and energy barrier analysis reveal that the formation of the Eigen cation requires significantly higher energy than the Zundel features. This confirms that the Zundel ion is destabilized and promptly converts in to Eigen ion at this interface. Moreover, we identified a Grotthuss-type mechanism for the proton transfer through a water chain close to the interface, where symmetrical and unsymmetrical arrangements of water molecules around H+ of protonated POSS-H+ are involved in the conduction of proton through water wires where successive Eigen-to-Zundel and Zundel-to-Eigen transformations are observed in quick succession.
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Affiliation(s)
- K R Maiyelvaganan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603203, Chennai TN, India
| | - S Kamalakannan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603203, Chennai TN, India
| | - S Shanmugan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603203, Chennai TN, India
| | - M Prakash
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603203, Chennai TN, India.
| | - F-X Coudert
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France.
| | - M Hochlaf
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454 Champs sur Marne, France.
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Carucci C, Scalas N, Porcheddu A, Piludu M, Monduzzi M, Salis A. Adsorption and Release of Sulfamethizole from Mesoporous Silica Nanoparticles Functionalised with Triethylenetetramine. Int J Mol Sci 2021; 22:7665. [PMID: 34299286 PMCID: PMC8304341 DOI: 10.3390/ijms22147665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/09/2021] [Accepted: 07/14/2021] [Indexed: 01/01/2023] Open
Abstract
Mesoporous silica nanoparticles (MSN) were synthesised and functionalised with triethylenetetramine (MSN-TETA). The samples were fully characterised (transmission electron microscopy, small angle X-ray scattering, Fourier transform infrared spectroscopy, thermogravimetric analysis, zeta potential and nitrogen adsorption/desorption isotherms) and used as carriers for the adsorption of the antimicrobial drug sulphamethizole (SMZ). SMZ loading, quantified by UV-Vis spectroscopy, was higher on MSN-TETA (345.8 mg g-1) compared with bare MSN (215.4 mg g-1) even in the presence of a lower surface area (671 vs. 942 m2 g-1). The kinetics of SMZ adsorption on MSN and MSN-TETA followed a pseudo-second-order model. The adsorption isotherm is described better by a Langmuir model rather than a Temkin or Freundlich model. Release kinetics showed a burst release of SMZ from bare MSN samples (k1 = 136 h-1) in contrast to a slower release found with MSN-TETA (k1 = 3.04 h-1), suggesting attractive intermolecular interactions slow down SMZ release from MSN-TETA. In summary, the MSN surface area did not influence SMZ adsorption and release. On the contrary, the design of an effective drug delivery system must consider the intermolecular interactions between the adsorbent and the adsorbate.
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Affiliation(s)
- Cristina Carucci
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy; (C.C.); (N.S.); (A.P.); (M.M.)
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via Della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
| | - Nicola Scalas
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy; (C.C.); (N.S.); (A.P.); (M.M.)
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy; (C.C.); (N.S.); (A.P.); (M.M.)
| | - Marco Piludu
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via Della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
- Dipartimento di Scienze Biomediche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy
| | - Maura Monduzzi
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy; (C.C.); (N.S.); (A.P.); (M.M.)
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via Della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
| | - Andrea Salis
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, SS 554 Bivio Sestu, 09042 Monserrato, CA, Italy; (C.C.); (N.S.); (A.P.); (M.M.)
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via Della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy;
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Sharma D, Lim RYH, Pfohl T, Ekinci Y. Surface-modified elastomeric nanofluidic devices for single nanoparticle trapping. MICROSYSTEMS & NANOENGINEERING 2021; 7:46. [PMID: 34567759 PMCID: PMC8433227 DOI: 10.1038/s41378-021-00273-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 01/14/2021] [Accepted: 04/15/2021] [Indexed: 06/13/2023]
Abstract
Our work focuses on the development of simpler and effective production of nanofluidic devices for high-throughput charged single nanoparticle trapping in an aqueous environment. Single nanoparticle confinement using electrostatic trapping has been an effective approach to study the fundamental properties of charged molecules under a controlled aqueous environment. Conventionally, geometry-induced electrostatic trapping devices are fabricated using SiOx-based substrates and comprise nanochannels imbedded with nanoindentations such as nanopockets, nanoslits and nanogrids. These geometry-induced electrostatic trapping devices can only trap negatively charged particles, and therefore, to trap positively charged particles, modification of the device surface is required. However, the surface modification process of a nanofluidic device is cumbersome and time consuming. Therefore, here, we present a novel approach for the development of surface-modified geometry-induced electrostatic trapping devices that reduces the surface modification time from nearly 5 days to just a few hours. We utilized polydimethylsiloxane for the development of a surface-modified geometry-induced electrostatic trapping device. To demonstrate the device efficiency and success of the surface modification procedure, a comparison study between a PDMS-based geometry-induced electrostatic trapping device and the surface-modified polydimethylsiloxane-based device was performed. The device surface was modified with two layers of polyelectrolytes (1: poly(ethyleneimine) and 2: poly(styrenesulfonate)), which led to an overall negatively charged surface. Our experiments revealed the presence of a homogeneous surface charge density inside the fluidic devices and equivalent trapping strengths for the surface-modified and native polydimethylsiloxane-based geometry-induced electrostatic trapping devices. This work paves the way towards broader use of geometry-induced electrostatic trapping devices in the fields of biosensing, disease diagnosis, molecular analysis, fluid quality control and pathogen detection.
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Affiliation(s)
- Deepika Sharma
- Swiss Nanoscience Institute, 4056 Basel, Switzerland
- Biozentrum, University of Basel, 4056 Basel, Switzerland
- Laboratory for Micro and Nanotechnology, Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - Roderick Y. H. Lim
- Swiss Nanoscience Institute, 4056 Basel, Switzerland
- Biozentrum, University of Basel, 4056 Basel, Switzerland
| | - Thomas Pfohl
- Swiss Nanoscience Institute, 4056 Basel, Switzerland
- Institute of Physics, University of Freiburg, D-79104 Freiburg, Germany
| | - Yasin Ekinci
- Swiss Nanoscience Institute, 4056 Basel, Switzerland
- Laboratory for Micro and Nanotechnology, Paul Scherrer Institut, 5232 Villigen, Switzerland
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Olusegun SJ, Freitas ETF, Lara LRS, Mohallem NDS. Synergistic effect of a spinel ferrite on the adsorption capacity of nano bio-silica for the removal of methylene blue. ENVIRONMENTAL TECHNOLOGY 2021; 42:2163-2176. [PMID: 31746281 DOI: 10.1080/09593330.2019.1694083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
The synergistic effect of CoFe2O4 on the capacity of bio-silica extracted from rice husk for the removal of methylene blue (MB) was investigated. The novel composite of cobalt ferrite/nano bio-silica was prepared by dispersing cobalt and iron salt in ratio 1:2 in a solution containing bio-silica, calcined at 700°C and characterized. The adsorption capacity of the composite (253.6 mg g-1) was higher than that of bio-silica (52.6 mg g-1), and the process was exothermic and spontaneous. Langmuir and Freundlich models were applicable to explain the adsorption isotherm, while pseudo-second-order and Elovich are best applicable for the kinetics mechanism. The amount of MB that was removed, increased with an increase in ionic strength due to dimerization of MB. Regeneration and reusability of the adsorbents showed that they are economically viable. Energy-filtered transmission electron microscopy (EFTEM) and Fourier transformed infrared (FTIR) analysis of MB-loaded adsorbent confirmed the adsorption of MB.
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Affiliation(s)
- Sunday J Olusegun
- Departamento de Química, Laboratório de Materiais Nanoestruturados, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Erico T F Freitas
- Universidade Federal de Minas Gerais, Centro de Microscopia, Belo Horizonte, Brazil
| | - Luciano R S Lara
- Departamento de Química, Laboratório de Materiais Nanoestruturados, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Nelcy D S Mohallem
- Departamento de Química, Laboratório de Materiais Nanoestruturados, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Kozlik P, Vaclova J, Kalikova K. Mixed-mode hydrophilic interaction/ion-exchange liquid chromatography – Separation potential in peptide analysis. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106158] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Malgras V, Matsushita Y, Henzie J, Sugahara Y, Yamauchi Y. Free-standing membranes from the chemical exfoliation of mesoporous amorphous titania thin film. Chem Commun (Camb) 2021; 57:7513-7516. [PMID: 34235527 DOI: 10.1039/d1cc02645c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Thin films are typically bound to their substrate, limiting their integration on rough, porous, curved or chemically/thermally sensitive surfaces. Instead of employing tedious and expensive back-etching processes, specific chemical routes can enable the exfoliation of such thin structures. Herein, we demonstrate that an alkaline treatment can exfoliate a hybrid thin film comprising amorphous titania embedded in well-ordered block-copolymer micelles, which can be redeposited elsewhere. We provide sufficient evidence of the preservation of pore ordering and the importance of neutralizing the solution to spare the system from the redissolution of the titania species.
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Affiliation(s)
- Victor Malgras
- International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitectonics (WPI-MANA) and JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
| | - Yoshitaka Matsushita
- International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitectonics (WPI-MANA) and JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
| | - Joel Henzie
- International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitectonics (WPI-MANA) and JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
| | - Yoshiyuki Sugahara
- Department of Applied Chemisty, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-0085, Japan and JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
| | - Yusuke Yamauchi
- International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitectonics (WPI-MANA) and JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. and JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia.
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Kawaguchi K, Wang Y, Xu J, Ootani Y, Higuchi Y, Ozawa N, Kubo M. Cooperative roles of chemical reactions and mechanical friction in chemical mechanical polishing of gallium nitride assisted by OH radicals: tight-binding quantum chemical molecular dynamics simulations. Phys Chem Chem Phys 2021; 23:4075-4084. [DOI: 10.1039/d0cp05826b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical mechanical polishing (CMP) of Ga-face GaN is accelerated by the chemical reactions with OH radicals.
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Affiliation(s)
| | - Yang Wang
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
- Department of Mechanical Systems Engineering
| | - Jingxiang Xu
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
- College of Engineering Science and Technology
| | - Yusuke Ootani
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
| | - Yuji Higuchi
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
| | - Nobuki Ozawa
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
| | - Momoji Kubo
- Institute for Materials Research
- Tohoku University
- Aoba-ku
- Japan
- New Industry Creation Hatchery Center
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Paszko T, Matysiak J, Kamiński D, Pasieczna-Patkowska S, Huber M, Król B. Adsorption of bentazone in the profiles of mineral soils with low organic matter content. PLoS One 2020; 15:e0242980. [PMID: 33264340 PMCID: PMC7710104 DOI: 10.1371/journal.pone.0242980] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 11/13/2020] [Indexed: 11/18/2022] Open
Abstract
The current laboratory adsorption study aimed at determination of the values of adsorption distribution coefficient (Kd) of bentazone in the profiles of Arenosols, Luvisols, and Cambisols, which are the most common arable mineral soils in Poland. The study attempted to identify the soil components that bind bentazone and the principal adsorption mechanisms of this compound as well as create a model capable of predicting its adsorption in soils. The Kd values determined in batch experiments after 24 h of shaking were very low, and ranged from 0.05 to 0.30 mL/g for the Ap horizon and 0 to 0.07 mL/g for subsoils. The results indicated that the anionic form of bentazone was adsorbed on organic matter, while in acidic soils the neutral form of bentazone was adsorbed on organic matter and sand. The detailed analyses of mineralogical composition revealed that the principal mineral that was responsible for the adsorption of bentazone was quartz, which content was strongly positively correlated with the sand fraction. In soils with pH < 5 and an organic carbon content of < 0.35%, quartz exhibited much greater affinity for the neutral bentazone form than organic matter. Fourier transform infrared photoacoustic spectroscopy analyses supported by computational methods have shown the most probable mechanisms behind the adsorption of bentazone on quartz. The created model, assuming the adsorption of bentazone on organic matter and on sand and using the spectrophotometrically determined dissociation constant of bentazone, very well explained the Kd variance in the 81 examined soils, while correctly predicting the adsorption based on soil properties described in the published data.
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Affiliation(s)
- Tadeusz Paszko
- Department of Chemistry, University of Life Sciences, Lublin, Poland
- * E-mail:
| | - Joanna Matysiak
- Department of Chemistry, University of Life Sciences, Lublin, Poland
| | - Daniel Kamiński
- Department of General and Coordination Chemistry and Crystallography, Maria Curie-Skłodowska University, Lublin, Poland
| | | | - Miłosz Huber
- Department of Geology, Soil Science and Geoinformation, Maria Curie-Skłodowska University, Lublin, Poland
| | - Beata Król
- Department of Industrial and Medicinal Plants, University of Life Sciences, Lublin, Poland
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Mukundan S, Melo JS, Sen D, Bahadur J. Enhancement in β-galactosidase activity of Streptococcus lactis cells by entrapping in microcapsules comprising of correlated silica nanoparticles. Colloids Surf B Biointerfaces 2020; 195:111245. [DOI: 10.1016/j.colsurfb.2020.111245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/01/2020] [Accepted: 07/06/2020] [Indexed: 02/08/2023]
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35
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Yıldırım D, Kip Ç, Tsogtbaatar K, Koçer İ, Çelik E, Tuncel A. Microfluidic immobilized metal affinity chromatography based on Ti(IV)-decorated silica microspheres for purification of phosphoproteins. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1140:122010. [DOI: 10.1016/j.jchromb.2020.122010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 12/20/2019] [Accepted: 01/30/2020] [Indexed: 02/09/2023]
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Le NT, Akkaraju GR, Coffer JL. Formation of Platinum Nanocrystals on Silicon Nanotubes and Corresponding Anti-Cancer Activity in Vitro. ACS APPLIED BIO MATERIALS 2020; 3:208-216. [DOI: 10.1021/acsabm.9b00719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Nguyen T. Le
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Giridhar R. Akkaraju
- Department of Biology, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Jeffery L. Coffer
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, United States
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Eftekhari M, Schwarzenberger K, Javadi A, Eckert K. The influence of negatively charged silica nanoparticles on the surface properties of anionic surfactants: electrostatic repulsion or the effect of ionic strength? Phys Chem Chem Phys 2020; 22:2238-2248. [PMID: 31915756 DOI: 10.1039/c9cp05475h] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The presence of negatively charged nanoparticles affects the surface activity of anionic surfactants in an aqueous phase. Recent studies suggest that electrostatic repulsive forces play an important role in increasing the surface activity of surfactants. However, the addition of nanoparticles also increases the ionic strength of the system, which has a significant impact on the surfactant's properties, e.g. its critical micelle concentration (CMC). To investigate how and to what extent electrostatic forces and ionic strength influence the behavior of ionic surfactants, the surface tension and elasticity of different solutions were measured using drop profile tensiometry as a function of the surfactant (SDBS), nanoparticle (silica) and salt (KNO3) concentration. It is observed that the surface activity of the surfactants is mainly influenced by the change in the system's ionic strength due to the presence of nanoparticles. Several characteristic parameters including the equivalent concentration of the surfactant, the CMC and the apparent partial molar area of the adsorbed surfactant are theoretically calculated and further employed to validate experimental observations. Both the nanoparticles and electrolyte decrease the CMC, while the equivalent concentration of the surfactant remains nearly constant. This paper presents a criterion to estimate the possible influence of such forces for nanoparticles of different sizes and mass fractions.
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Affiliation(s)
- Milad Eftekhari
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstrasse 400, 01328 Dresden, Germany. and TU Dresden, Institute of Process Engineering and Environmental Technology, 01062 Dresden, Germany
| | - Karin Schwarzenberger
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstrasse 400, 01328 Dresden, Germany. and TU Dresden, Institute of Process Engineering and Environmental Technology, 01062 Dresden, Germany
| | - Aliyar Javadi
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstrasse 400, 01328 Dresden, Germany. and TU Dresden, Institute of Process Engineering and Environmental Technology, 01062 Dresden, Germany and Institute of Petroleum Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
| | - Kerstin Eckert
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstrasse 400, 01328 Dresden, Germany. and TU Dresden, Institute of Process Engineering and Environmental Technology, 01062 Dresden, Germany
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38
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Straw phytolith for less hazardous open burning of paddy straw. Sci Rep 2019; 9:20043. [PMID: 31882923 PMCID: PMC6934667 DOI: 10.1038/s41598-019-56735-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 12/03/2019] [Indexed: 01/25/2023] Open
Abstract
Rice production helps feed at least half of the world’s population but generates approximately one billion tonnes of straw residue per annum. On-site open burning of rice straw after harvesting is common in recent times because there has been less demand for rice straw to use as fuel and fodder. Due to health and climate change concerns, open burning, which results in biomass losses, smog and emissions of green house gases, e.g., CO2, has been widely criticized and banned in many countries. Little is known about the positive benefits of straw burning, such as field care (eradication of biotic diseases) or nutrient cycling. Herein, we propose a new viewpoint in which the burning of rice straw followed by cycling of the burned materials, including silica material (so-called phytolith), into soil is demonstrated as a CO2-sequestration strategy via buffering the soil CO2 flux and coupling CO2 with the silicon cycle.
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39
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Perera YR, Hill RA, Fitzkee NC. Protein Interactions with Nanoparticle Surfaces: Highlighting Solution NMR Techniques. Isr J Chem 2019; 59:962-979. [PMID: 34045771 PMCID: PMC8152826 DOI: 10.1002/ijch.201900080] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 09/02/2019] [Indexed: 12/14/2022]
Abstract
In the last decade, nanoparticles (NPs) have become a key tool in medicine and biotechnology as drug delivery systems, biosensors and diagnostic devices. The composition and surface chemistry of NPs vary based on the materials used: typically organic polymers, inorganic materials, or lipids. Nanoparticle classes can be further divided into sub-categories depending on the surface modification and functionalization. These surface properties matter when NPs are introduced into a physiological environment, as they will influence how nucleic acids, lipids, and proteins will interact with the NP surface. While small-molecule interactions are easily probed using NMR spectroscopy, studying protein-NP interactions using NMR introduces several challenges. For example, globular proteins may have a perturbed conformation when attached to a foreign surface, and the size of NP-protein conjugates can lead to excessive line broadening. Many of these challenges have been addressed, and NMR spectroscopy is becoming a mature technique for in situ analysis of NP binding behavior. It is therefore not surprising that NMR has been applied to NP systems and has been used to study biomolecules on NP surfaces. Important considerations include corona composition, protein behavior, and ligand architecture. These features are difficult to resolve using classical surface and material characterization strategies, and NMR provides a complementary avenue of characterization. In this review, we examine how solution NMR can be combined with other analytical techniques to investigate protein behavior on NP surfaces.
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Affiliation(s)
- Y Randika Perera
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Rebecca A Hill
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
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40
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Mizuguchi T, Hagita K, Fujiwara S, Yamada T. Hydrogen bond analysis of confined water in mesoporous silica using the reactive force field. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1652740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tomoko Mizuguchi
- Faculty of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Katsumi Hagita
- Department of Applied Physics, National Defense Academy, Yokosuka, Japan
| | - Susumu Fujiwara
- Faculty of Materials Science and Engineering, Kyoto Institute of Technology, Kyoto, Japan
| | - Takeshi Yamada
- CROSS Neutron Science and Technology Center, Tokai Naka, Japan
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41
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Mostafavi SH, Li W, Clark KD, Stricker F, Alaniz JRD, Bardeen CJ. Photoinduced Deadhesion of a Polymer Film Using a Photochromic Donor–Acceptor Stenhouse Adduct. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00882] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
| | | | - Kyle D. Clark
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Friedrich Stricker
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Javier Read de Alaniz
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
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A Broad-Range Fluorescence Lifetime pH Sensing Material Based on a Single Organic Fluorophore. J Fluoresc 2019; 29:1125-1131. [PMID: 31399830 DOI: 10.1007/s10895-019-02426-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 07/29/2019] [Indexed: 10/26/2022]
Abstract
A general drawback for optical based pH sensors is that their response is typically limited to within 2-3 pH units centered around the pKa of the indicator. Fluorescence lifetime (FL) is a particularly compelling basis for highly stable pH sensors since this is an intrinsic property of the indicator molecule. Here we demonstrate that it is possible to broaden the sensing range of FL based sensors significantly by placing the indicator in a support material where the indicator's chemical environment itself changes with pH. For acridine immobilized in amine-modified porous silica, a total FL change of 20 ns in the pH range 2-12 is achieved. A linear pH vs FL relationship is observed with three break points occurring at pH 4, 6 and 9 that are related to the pKa values of the indicator and the silica material. This proves the concept that tuning the fluorophore's chemical environment can broaden the FL pH sensing range, where currently available fluorophores do not cover the full pH range. Graphical Abstract.
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43
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Guan F, You Y, Li X, Robinson MA. A comprehensive approach to detecting multitudinous bioactive peptides in equine plasma and urine using hydrophilic interaction liquid chromatography coupled to high resolution mass spectrometry. Drug Test Anal 2019; 11:1308-1325. [PMID: 31250565 DOI: 10.1002/dta.2671] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/02/2019] [Accepted: 06/19/2019] [Indexed: 12/12/2022]
Abstract
Bioactive peptides possess pharmacological effects and can be illicitly used in sports. To deter such misuse, an untargeted method using high resolution mass spectrometry (HRMS) has been developed for comprehensive detection of multitudinous exogenous peptides in equine plasma and urine. Forty-four peptides were extracted using mixed-mode solid-phase extraction (SPE) from plasma and urine, separated with a hydrophilic interaction liquid chromatography (HILIC) column, and detected on an HRMS instrument. Ammonium formate as a mobile phase additive had effects on HILIC retention and charge state distribution of the peptides. The acetonitrile percentage in the reconstitution solution affected the solubility of peptide neat standards and peptides in plasma and urine extracts differently. The stability of the peptides in plasma at ambient temperature was assessed. The limit of detection (LOD) was 10-50 pg/mL for most of the peptides in plasma, and ≤ 500 pg/mL for the remaining. LOD was 100-400 pg/mL for the majority of the analytes in urine, and ≤ 4000 pg/mL for the others. The method was used successfully to analyze incurred plasma and urine samples from research horses administered dermorphin. Even in the absence of reference standards, dermorphin metabolites (aFGYPS-NH2 , YaFG, and YaF) were identified. These results demonstrate that data generated with this method can be retrospectively reviewed for peptides that are unknown at the time of sample analysis without requiring re-analysis of the sample. This method provides a powerful novel tool for detection of numerous bioactive peptides and their metabolites in equine plasma and urine for doping control.
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Affiliation(s)
- Fuyu Guan
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center Campus, 382 West Street Road, Kennett Square, PA, 19348, USA.,Pennsylvania Equine Toxicology and Research Laboratory, 220 East Rosedale Avenue, West Chester, PA, 19382, USA
| | - Youwen You
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center Campus, 382 West Street Road, Kennett Square, PA, 19348, USA.,Pennsylvania Equine Toxicology and Research Laboratory, 220 East Rosedale Avenue, West Chester, PA, 19382, USA
| | - Xiaoqing Li
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center Campus, 382 West Street Road, Kennett Square, PA, 19348, USA.,Pennsylvania Equine Toxicology and Research Laboratory, 220 East Rosedale Avenue, West Chester, PA, 19382, USA
| | - Mary A Robinson
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center Campus, 382 West Street Road, Kennett Square, PA, 19348, USA.,Pennsylvania Equine Toxicology and Research Laboratory, 220 East Rosedale Avenue, West Chester, PA, 19382, USA
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Boudissa F, Mirilà D, Arus VA, Terkmani T, Semaan S, Proulx M, Nistor ID, Roy R, Azzouz A. Acid-treated clay catalysts for organic dye ozonation - Thorough mineralization through optimum catalyst basicity and hydrophilic character. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:356-366. [PMID: 30384246 DOI: 10.1016/j.jhazmat.2018.09.070] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 06/08/2023]
Abstract
Catalytic ozonation of Methylene Blue, Methyl Green, Methyl Orange and Methyl-thymol Blue was investigated in the presence of ion-exchanged montmorillonite (NaMt and Fe(II)Mt), crude bentonite and acid-activated counterparts. An original approach never tackled so far consisted in correlating the basicity and hydrophilic character to the dye-catalyst interactions occurring on the catalyst surface. This was achieved through CO2 and water thermal programmed desorption. Kinetics study revealed that ozonation starts in the bulk solution, and dye adsorption turns out to be an essential requirement for high catalytic effectiveness. On NaMt, dye molecules appear to adsorb mainly via hydrophobic interaction. On Fe(II)Mt, the contributions of hydrophobic interaction, cation-exchange and Fe2+ mobility to the catalytic activity prevail. Acid activated clay catalysts exhibited lowest hydrophilic character favoring adsorption through organophilic interaction and affording thorough and fast dye mineralization. This was explained in terms of increased number of silanols and -Si-O-Si- groups. For all catalysts, short ozonation of all dye molecules resulted in similar end-chain products, which were totally eliminated after prolonged reaction times. This result is of great importance because it provides valuable theoretical findings that allow envisaging total mineralization of organic molecules by recyclable metal-free clay catalysts.
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Affiliation(s)
- Farida Boudissa
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada
| | - Diana Mirilà
- Catalysis and Microporous Materials Laboratory, Vasile-Alecsandri University of Bacau, Romania
| | - Vasilica-Alisa Arus
- Catalysis and Microporous Materials Laboratory, Vasile-Alecsandri University of Bacau, Romania
| | - Thizizi Terkmani
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada
| | - Sirène Semaan
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada
| | - Mélanie Proulx
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada
| | - Ileana-Denisa Nistor
- Catalysis and Microporous Materials Laboratory, Vasile-Alecsandri University of Bacau, Romania
| | - René Roy
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada
| | - Abdelkrim Azzouz
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC, H3C 3P8, Canada.
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46
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Tuning lysozyme nanofibers dimensions using deep eutectic solvents for improved reinforcement ability. Int J Biol Macromol 2018; 115:518-527. [DOI: 10.1016/j.ijbiomac.2018.03.150] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/14/2018] [Accepted: 03/24/2018] [Indexed: 11/18/2022]
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Spectroscopic Determination of Water Salinity in Brackish Surface Water in Nandoni Dam, at Vhembe District, Limpopo Province, South Africa. WATER 2018. [DOI: 10.3390/w10080990] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The problem of limited water supply in the Vhembe District (Limpopo Province, South Africa) is exacerbated by a preponderance of dissolved salts, which cause disagreeable taste and odour in the water as reported by the communities using this water for drinking. The water treatment plant that supplies the treated water to the communities in the District sources this raw water from the Nandoni Dam at the Luvuvhu river catchment. There are no scientific studies that have been reported in the literature that focused on determining the levels of water salinity from various water sources in the municipalities of the District. Water samples from various sites across the Nandoni Dam, a primary source of domestic water supply in the region, were collected through each season over a period of twelve months in order to ascertain the concentrations of dissolved salts in the dam. Onsite analyses of the water samples were conducted using the YSI ProDSS multimeter, while the laboratory water analyses were conducted using the spectroquant and atomic absorption spectrometers. Although salinity tests seem to indicate that the water sampled across most of the Nandoni Dam is brackish during all seasons of the year with the highest being 750 mg/L, water samples from the dam mid-outlet and the treatment plant are slightly below the World Health Organization (WHO) brackish water bracket of 500 mg/L with unfavourable taste for drinking. Results from this study indicate that the water sourced from the Nandoni Dam is not suitable for human consumption and therefore requires integrated water resource management, as well as robust and cost-effective water desalination treatment.
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Lowe BM, Sun K, Zeimpekis I, Skylaris CK, Green NG. Field-effect sensors - from pH sensing to biosensing: sensitivity enhancement using streptavidin-biotin as a model system. Analyst 2018; 142:4173-4200. [PMID: 29072718 DOI: 10.1039/c7an00455a] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Field-Effect Transistor sensors (FET-sensors) have been receiving increasing attention for biomolecular sensing over the last two decades due to their potential for ultra-high sensitivity sensing, label-free operation, cost reduction and miniaturisation. Whilst the commercial application of FET-sensors in pH sensing has been realised, their commercial application in biomolecular sensing (termed BioFETs) is hindered by poor understanding of how to optimise device design for highly reproducible operation and high sensitivity. In part, these problems stem from the highly interdisciplinary nature of the problems encountered in this field, in which knowledge of biomolecular-binding kinetics, surface chemistry, electrical double layer physics and electrical engineering is required. In this work, a quantitative analysis and critical review has been performed comparing literature FET-sensor data for pH-sensing with data for sensing of biomolecular streptavidin binding to surface-bound biotin systems. The aim is to provide the first systematic, quantitative comparison of BioFET results for a single biomolecular analyte, specifically streptavidin, which is the most commonly used model protein in biosensing experiments, and often used as an initial proof-of-concept for new biosensor designs. This novel quantitative and comparative analysis of the surface potential behaviour of a range of devices demonstrated a strong contrast between the trends observed in pH-sensing and those in biomolecule-sensing. Potential explanations are discussed in detail and surface-chemistry optimisation is shown to be a vital component in sensitivity-enhancement. Factors which can influence the response, yet which have not always been fully appreciated, are explored and practical suggestions are provided on how to improve experimental design.
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Affiliation(s)
- Benjamin M Lowe
- Department of Electronics and Computer Science, Nano Research Group, University of Southampton, UK.
| | - Kai Sun
- Department of Electronics and Computer Science, Nano Research Group, University of Southampton, UK.
| | - Ioannis Zeimpekis
- Department of Electronics and Computer Science, Nano Research Group, University of Southampton, UK.
| | | | - Nicolas G Green
- Department of Electronics and Computer Science, Nano Research Group, University of Southampton, UK.
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Zhang M, Yang H, Wang S, Zhang W, Hou Q, Guo D, Liu F, Chen T, Wu X, Wang J. PAMAM-Based Dendrimers with Different Alkyl Chains Self-Assemble on Silica Surfaces: Controllable Layer Structure and Molecular Aggregation. J Phys Chem B 2018; 122:6648-6655. [PMID: 29897753 DOI: 10.1021/acs.jpcb.8b02534] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Amphiphilic poly(amidoamine) (PAMAM) dendrimers are a well-known dendritic family due to their remarkable ability to self-assemble on solid surface. However, the relationship between molecular conformation (or adsorption kinetics) of a self-assembled layer and molecular amphiphilicity of such kind of dendrimer is still lacking, which limits the development of modulating self-assembling structures and surface functionality. With this in mind, we synthesized a series of amphiphilic PAMAM-based dendrimers, denoted as G1C n, with different alkyl chains ( n = 8, 12, and 16), and investigated the molecular aggregation on silica surfaces by means of quartz crystal microbalance with dissipation, atomic force microscopy, and contact angle. After rinsing, remaining adsorption amounts of G1C12 were higher than those of G1C8 at high concentrations, suggesting that G1C12 adlayers were more stable due to the stronger intermolecular hydrophobic interactions, whereas it preferred to adopt the intramolecular hydrophobic interactions for G1C16, with low adsorption amounts and unstable adlayers. Bilayer-like structures were inferred in G1C8 and G1C12 adlayers with loose conformation, whereas monolayer structures were likely to exist in the sparse adsorption film of G1C16. Our results provided more detailed understanding of the effect of molecular structure on the self-assembled structures of amphiphilic dendrimers on solid surfaces, shedding light on the controlled microstructure and wettability of functional surface by modulating the length of hydrophobic chains of dendrimers and a potential application of dendrimer-substrate combinations.
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Affiliation(s)
- Minghui Zhang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Hui Yang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Shujuan Wang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Wei Zhang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Qingfeng Hou
- Key Laboratory of Oilfield Chemistry , Research Institute of Petroleum Exploration and Development (RIPED), CNPC , Beijing 100083 , P. R. China
| | - Donghong Guo
- Key Laboratory of Oilfield Chemistry , Research Institute of Petroleum Exploration and Development (RIPED), CNPC , Beijing 100083 , P. R. China
| | - Fanghui Liu
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Ting Chen
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Xu Wu
- Department of Chemistry and Chemical Engineering , Guangzhou University , Guangzhou 510006 , Guangdong , P. R. China
| | - Jinben Wang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , P. R. China
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Lowe BM, Skylaris CK, Green NG, Shibuta Y, Sakata T. Molecular dynamics simulation of potentiometric sensor response: the effect of biomolecules, surface morphology and surface charge. NANOSCALE 2018; 10:8650-8666. [PMID: 29700545 DOI: 10.1039/c8nr00776d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The silica-water interface is critical to many modern technologies in chemical engineering and biosensing. One technology used commonly in biosensors, the potentiometric sensor, operates by measuring the changes in electric potential due to changes in the interfacial electric field. Predictive modelling of this response caused by surface binding of biomolecules remains highly challenging. In this work, through the most extensive molecular dynamics simulation of the silica-water interfacial potential and electric field to date, we report a novel prediction and explanation of the effects of nano-morphology on sensor response. Amorphous silica demonstrated a larger potentiometric response than an equivalent crystalline silica model due to increased sodium adsorption, in agreement with experiments showing improved sensor response with nano-texturing. We provide proof-of-concept that molecular dynamics can be used as a complementary tool for potentiometric biosensor response prediction. Effects that are conventionally neglected, such as surface morphology, water polarisation, biomolecule dynamics and finite-size effects, are explicitly modelled.
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Affiliation(s)
- B M Lowe
- Department of Materials Engineering, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan.
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