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Sruamsiri D, Shimojima A, Ogawa M. Novel Floating Adsorbent for Water Treatment: Organically Modified Layered Alkali Silicate by Facile Mechanochemical Reaction. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41130-41140. [PMID: 37594322 DOI: 10.1021/acsami.3c08229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Adsorption serves as an effective way to collect (remove) contaminants from aqueous solution. In the present study, a novel floating adsorbent was designed through surface modification of a layered alkali silicate (octosilicate) using a silane coupling reagent (chlorodimethyl[3-(2,3,4,5,6-pentafluorophenyl)propyl]silane) to collect metal ions from water. By conducting the grafting by solvent-free mechanochemical reaction at room temperature, the external surface of octosilicate was modified to be hydrophobic while preserving the ion exchange capability in the interlayer space. Characterizations of XRD, IR, SEM, TGA, 29Si MAS NMR, and 19F MAS NMR confirmed the successful grafting at the external surface of octosilicate particles. The modified silicate demonstrated buoyancy at the air-water interface, facilitating the concentration of methylene blue, Ni2+, and Pb2+ from aqueous solutions. The adsorbed amounts of metal ions on the floating adsorbent were greater than those reported for the common nonfloating adsorbents (zeolites, clays, and clay minerals).
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Affiliation(s)
- Donhatai Sruamsiri
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand
| | - Atsushi Shimojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand
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Surface-bubble-modulated liquid chromatography: an experimental strategy for identification of molecular processes of solute retention in reversed-phase separation systems. ANAL SCI 2023; 39:791-813. [PMID: 36894780 DOI: 10.1007/s44211-023-00291-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 02/07/2023] [Indexed: 03/11/2023]
Abstract
Molecular level understanding of the chemistry at the aqueous/hydrophobe interface is crucial to separation processes in aqueous media, such as reversed-phase liquid chromatography (RPLC) and solid-phase extraction (SPE). Despite significant advances in our knowledge of the solute retention mechanism in these reversed-phase systems, direct observation of the behavior of molecules and ions at the interface in reversed-phase systems still remains a major challenge and experimental probing techniques that provide the spatial information of the distribution of molecules and ions are required. This review addresses surface-bubble-modulated liquid chromatography (SBMLC), which has a stationary gas phase in a column packed with hydrophobic porous materials and enables one to observe the molecular distribution in the heterogeneous reversed-phase systems consisting of the bulk liquid phase, the interfacial liquid layer, and the hydrophobic materials. The distribution coefficients of organic compounds referring to their accumulations onto the interface of alkyl- and phenyl-hexyl-bonded silica particles exposed to water or acetonitrile-water and into the bonded layers from the bulk liquid phase are determined by SBMLC. The experimental data obtained by SBMLC show that the water/hydrophobe interface exhibits an accumulation selectivity for organic compounds, which is quite different from that of the interior of the bonded chain layer, and the overall separation selectivity of the reversed-phase systems is determined by the relative sizes of the aqueous/hydrophobe interface and the hydrophobe. The solvent composition and the thickness of the interfacial liquid layer formed on octadecyl-bonded (C18) silica surfaces are also estimated from the bulk liquid phase volume determined by the ion partition method employing small inorganic ions as probes. It is clarified that various hydrophilic organic compounds as well as inorganic ions recognize the interfacial liquid layer formed on the C18-bonded silica surfaces as being different from the bulk liquid phase. The behavior of some solute compounds exhibiting substantially weak retention in RPLC or the so-called negative adsorption, such as urea, sugars, and inorganic ions, can rationally be interpreted with a partition between the bulk liquid phase and the interfacial liquid layer. The spatial distribution of solute molecules and the structural properties of the solvent layer on the C18-bonded layer determined by the liquid chromatographic methods are discussed in comparison to the results obtained by other research groups using molecular simulation methods.
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Ciogli A, Buonsenso F, Proietti N, Mazzoccanti G, Manetto S, Calcaterra A, De Angelis M, Gasparrini F. Preparation of a high-density vinyl silica gel to anchor cysteine via photo-click reaction and its applications in hydrophilic interaction chromatography. J Chromatogr A 2022; 1675:463173. [DOI: 10.1016/j.chroma.2022.463173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 11/29/2022]
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Effect of Natural Deep Eutectic Solvents on trans-Resveratrol Photo-Chemical Induced Isomerization and 2,4,6-Trihydroxyphenanthrene Electro-Cyclic Formation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072348. [PMID: 35408747 PMCID: PMC9000676 DOI: 10.3390/molecules27072348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/09/2022] [Accepted: 04/01/2022] [Indexed: 11/20/2022]
Abstract
trans-Resveratrol is a natural bioactive compound with well-recognized health promoting effects. When exposed to UV light, this compound can undergo a photochemically induced trans/cis isomerization and a 6π electrochemical cyclization with the subsequent formation of 2,4,6-trihydroxyphenanthrene (THP). THP is a potentially harmful compound which can exert genotoxic effects. In this work we improved the chromatographic separation and determination of the two resveratrol isomers and of THP by using a non-commercial pentafluorophenyl stationary phase. We assessed the effect of natural deep eutectic solvents (NaDES) as possible photo-protective agents by evaluating cis-resveratrol isomer and THP formation under different UV-light exposure conditions with the aim of enhancing resveratrol photostability and inhibiting THP production. Our results demonstrate a marked photoprotective effect exerted by glycerol-containing NaDES, and in particular by proline/glycerol NaDES, which exerts a strong inhibitory effect on the photochemical isomerization of resveratrol and significantly limits the formation of the toxic derivative THP. Considering the presence of resveratrol in various commercial products, these results are of note in view of the potential genotoxic risk associated with its photochemical degradation products and in view of the need for the development of green, eco-sustainable and biocompatible resveratrol photo-stable formulations.
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Ohmuro S, Ishizaki R, Tsukamoto M, Nasu S, Yasui T, Takada K, Yuchi A. Effects of Residual Silanol on Solid Phase Extraction of Organic Compounds to Octadecylsilyl Silica. ANAL SCI 2021; 37:879-885. [PMID: 33132232 DOI: 10.2116/analsci.20p314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Batchwise equilibrium study was carried out on the retention of nonpolar and polar organic compounds to octadecylsilyl (ODS) silicas of different properties at atmospheric pressure. While nonpolar compounds were retained only by distribution on the ODS phase, polar compounds were retained by both distribution and Langmuir-type adsorption on residual silanol. Retention on ODS silica with more silanol proceeded at a higher rate than retention on ODS silica with less silanol and was reversible on this solid phase extraction time-scale. An increase in surface density of ODS decreased the distribution constant, due to a decrease in fraction of ODS functioning as an extracting medium and also decreased the saturated adsorption amount, due to reductions of the residual silanol and the functioning ODS. The ODS silica with the lowest ODS density showed a distribution constant 31 times higher and a saturated adsorption amount 27 times higher than the ODS silica with the highest ODS density. On the other hand, because the interaction between the organic part and the ODS group introduced at higher density is strengthened, the adsorption constant is increased by about 5 times compared to the low density ODS silica. The electronic effects of substituents to nitrogen- and oxygen-containing compounds on retention were discussed. In conclusion, ODS silica with an appreciable amount of residual silanol is superior for solid phase extraction.
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Affiliation(s)
- Satoshi Ohmuro
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Ryo Ishizaki
- Graduate School of Engineering, Nagoya Institute of Technology
| | | | - Shizuka Nasu
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Takashi Yasui
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Kazutake Takada
- Graduate School of Engineering, Nagoya Institute of Technology
| | - Akio Yuchi
- Graduate School of Engineering, Nagoya Institute of Technology
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Ciogli A, Capitani D, Di Iorio N, Crotti S, Bencivenni G, Donzello MP, Villani C. A Silica-Supported Catalyst Containing 9-Amino-9-deoxy-9-epi
-quinine and a Benzoic Acid Derivative for Stereoselective Batch and Flow Heterogeneous Reactions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900148] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Alessia Ciogli
- Dipartimento di Chimica e Tecnologie del Farmaco; Sapienza Università di Roma; Piazzale A. Moro, 5 00185 Roma Italy
| | - Donatella Capitani
- Consiglio Nazionale delle Ricerche, CNR; Istituto di Metodologie Chimiche; Lab. di Risonanza Magnetica “Annalaura Segre”; Via Salaria km 29,300 C.P. 10 Monterotondo Stazione Roma Italy
| | - Nicola Di Iorio
- Dipartimento di Chimica Industriale “Toso Montanari”; Alma Mater Studiorum-Università di Bologna; Viale del Risorgimento 4 40136 Bologna Italy
| | - Simone Crotti
- Dipartimento di Chimica Industriale “Toso Montanari”; Alma Mater Studiorum-Università di Bologna; Viale del Risorgimento 4 40136 Bologna Italy
| | - Giorgio Bencivenni
- Dipartimento di Chimica Industriale “Toso Montanari”; Alma Mater Studiorum-Università di Bologna; Viale del Risorgimento 4 40136 Bologna Italy
| | - Maria Pia Donzello
- Dipartimento di Chimica; Sapienza Università di Roma; Piazzale A. Moro, 5 00185 Roma Italy
| | - Claudio Villani
- Dipartimento di Chimica e Tecnologie del Farmaco; Sapienza Università di Roma; Piazzale A. Moro, 5 00185 Roma Italy
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Bacalum E, Cheregi M. Recent analytical applications of fluorinated hydrocarbon-based stationary phases in HPLC. J LIQ CHROMATOGR R T 2017. [DOI: 10.1080/10826076.2017.1284676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Elena Bacalum
- Research Institute from University of Bucharest – ICUB, Bucharest, Romania
| | - Mihaela Cheregi
- Faculty of Chemistry, Department of Analytical Chemistry, University of Bucharest, Bucharest, Romania
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Bocian S, Skoczylas M, Goryńska I, Matyska M, Pesek J, Buszewski B. Solvation processes on phenyl-bonded stationary phases-The influence of polar functional groups. J Sep Sci 2016; 39:4369-4376. [DOI: 10.1002/jssc.201600799] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/19/2016] [Accepted: 09/19/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Szymon Bocian
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry; Nicolaus Copernicus University; Toruń Poland
| | - Magdalena Skoczylas
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry; Nicolaus Copernicus University; Toruń Poland
| | - Izabela Goryńska
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry; Nicolaus Copernicus University; Toruń Poland
| | - Maria Matyska
- Department of Chemistry; San Jose State University; San Jose CA USA
| | - Joseph Pesek
- Department of Chemistry; San Jose State University; San Jose CA USA
| | - Bogusław Buszewski
- Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry; Nicolaus Copernicus University; Toruń Poland
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Catani M, Guzzinati R, Marchetti N, Pasti L, Cavazzini A. Exploring Fluorous Affinity by Liquid Chromatography. Anal Chem 2015; 87:6854-60. [DOI: 10.1021/acs.analchem.5b01212] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Martina Catani
- University of Ferrara, Department of Chemistry and Pharmaceutical Sciences, Via L. Borsari, 46, 44121 Ferrara, Italy
| | - Roberta Guzzinati
- University of Ferrara, Department of Chemistry and Pharmaceutical Sciences, Via L. Borsari, 46, 44121 Ferrara, Italy
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), R. C. Casaccia, Via Anguillarese, 301, S. Maria
di Galeria, 00123, Roma, Italy
| | - Nicola Marchetti
- University of Ferrara, Department of Chemistry and Pharmaceutical Sciences, Via L. Borsari, 46, 44121 Ferrara, Italy
| | - Luisa Pasti
- University of Ferrara, Department of Chemistry and Pharmaceutical Sciences, Via L. Borsari, 46, 44121 Ferrara, Italy
| | - Alberto Cavazzini
- University of Ferrara, Department of Chemistry and Pharmaceutical Sciences, Via L. Borsari, 46, 44121 Ferrara, Italy
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New insights into perfluorinated adsorbents for analytical and bioanalytical applications. Anal Bioanal Chem 2014; 407:17-21. [DOI: 10.1007/s00216-014-8198-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/29/2014] [Accepted: 09/16/2014] [Indexed: 10/24/2022]
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