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Pál D, Besnard C, de Aguirre A, Poblador-Bahamonde AI, Pescitelli G, Lacour J. 2,4,5,7-Tetranitrofluorenone Oximate for the Naked-Eye Detection of H-Bond Donors and the Chiroptical Sensing of Enantiopure Reagents. Chemistry 2023; 29:e202302169. [PMID: 37529861 DOI: 10.1002/chem.202302169] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/03/2023]
Abstract
Hydrogen bonding greatly influences rates and equilibrium positions of chemical reactions, conformations, and sometimes even stereochemistry. This study reports on tetranitrofluorenone oximate, a novel dye capable of naked-eye detection of hydrogen-bond donating species (HBDs) and of rapid determination of H-bond donation strength by hypsochromic shift monitoring. In addition, the molecule possesses atropisomeric conformations, of M and P configuration, as evidenced in solid and solution state studies by X-ray diffraction and electronic circular dichroism (ECD), respectively. In the latter case, enantiopure bis-thioureas were the most effective HBDs to promote a chiral induction (diastereoselective recognition, Pfeiffer effect); the ECD results being rationalized by time-dependent density functional theory (TDDFT) calculations. Based on these experiments, bis-thioureas were used as chiral reagents in asymmetric 1,3-dipolar cycloadditions of structurally-related nitrones; the ECD sensing of the stereoinduction between bis-thioureas and the oximate serving as an indirect method of selection of the most effective HBD for asymmetric synthesis.
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Affiliation(s)
- Dávid Pál
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet Genève, 24, 1211, Geneva 4, Switzerland
| | - Adiran de Aguirre
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | | | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
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2
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Eremina OE, Samodelova MV, Ferree MV, Shekhovtsova TN, Veselova IA. Capturing polycyclic aromatic sulfur heterocycles in electron donor–acceptor complexes. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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3
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Eremina OE, Samodelova MV, Ferree MV, Shekhovtsova TN, Veselova IA. Capturing polycyclic aromatic sulfur heterocycles in electron donor–acceptor complexes. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Eremina OE, Sergeeva EA, Ferree MV, Shekhovtsova TN, Goodilin EA, Veselova IA. Dual-Purpose SERS Sensor for Selective Determination of Polycyclic Aromatic Compounds via Electron Donor-Acceptor Traps. ACS Sens 2021; 6:1057-1066. [PMID: 33529008 DOI: 10.1021/acssensors.0c02294] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Toxic, carcinogenic, and mutagenic properties of polycyclic aromatic hydrocarbons (PAHs) and environmental pollution caused by polycyclic aromatic sulfur heterocycles (PASHs) postulate the importance of their selective and sensitive determination in environmental and oil fuel samples. Surface-enhanced Raman spectroscopy (SERS) opens up an avenue toward multiplex analysis of complex mixtures, however not every molecule gives high enhancement factors and, thus, cannot be reliably detected via SERS. However, the sensitivity can be drastically increased by additional resonant enhancement as a result of the analyte absorption band overlapping with the surface plasmon band of nanoparticles (NPs) and the laser excitation wavelength. Using this idea, we developed a dual-purpose SERS sensor based on trapping the target PAHs and PASHs into colored charge-transfer complexes (CTCs) with selected organic π-acceptor molecules on the surface of AgNPs. Studying, computing, and then comparing stability constants of the formed CTC served as a powerful explanation and prediction tool for a wise choice of π-acceptor indicator systems for the further silver surface modification. Moreover, we show that CTC formation can be effectively utilized for increasing both selectivity and sensitivity by simple liquid-liquid extraction prior to SERS measurements. For the first time, the dual-purpose SERS sensor allowed determination of two different classes of polycyclic aromatic fuel components down to 10 nM concentration, lower than that restricted by the ASTM regulation, and demonstrated multi-purpose capabilities of the developed approach.
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Affiliation(s)
- Olga E. Eremina
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
| | - Elena A. Sergeeva
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
| | - Mariia V. Ferree
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
| | - Tatyana N. Shekhovtsova
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
| | - Eugene A. Goodilin
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
- Faculty of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
| | - Irina A. Veselova
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Moscow 119991, Russia
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5
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Construction of novel amphiphilic [Bmin]3PMo12O40/g-C3N4 heterojunction catalyst with outstanding photocatalytic oxidative desulfurization performance under visible light. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Eremina OE, Sidorov AV, Shekhovtsova TN, Goodilin EA, Veselova IA. Novel Multilayer Nanostructured Materials for Recognition of Polycyclic Aromatic Sulfur Pollutants and Express Analysis of Fuel Quality and Environmental Health by Surface Enhanced Raman Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15058-15067. [PMID: 28402098 DOI: 10.1021/acsami.7b02018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel concept of advanced SERS (surface enhanced Raman spectroscopy) planar sensors is suggested for fast analysis of sulfur-containing hazardous oil components and persistent pollutants. The main advantage of the proposed sensors is the utilization of an additional preconcentrating layer of optically transparent chitosan gel, which is chemically modified with appropriate π-acceptor compounds to selectively form charge-transfer complexes (CTCs) at the interface with nanostructured silver coatings. The CTCs shift absorption bands of polycyclic aromatic sulfur heterocycles (PASHs) and other important analytes in a controllable way and thus provide a surplus enhancement of vibration modes due to resonant Raman scattering. This novel indicator system provides multiplex determination of PASHs in different forms in a small volume of oil without any tedious sample pretreatment steps. This approach opens new possibilities of increasing either spectral and concentration sensitivity or specificity of SERS-based sensors, allowing for new developments in the fields of ecology, advanced fuel analysis, and other prospective applications.
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Affiliation(s)
- Olga E Eremina
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
| | - Alexander V Sidorov
- Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia
| | | | - Eugene A Goodilin
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
- Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia
- Institute of General and Inorganic Chemistry , Leninskii prosp., 31, Moscow 119071, Russia
| | - Irina A Veselova
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
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7
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He M, Li Y, Zhang J, Chen B. Desulfurization of gasoline by condensation of thiophenes with formaldehyde in a biphasic system using aqueous phase of acids. Chin J Chem Eng 2017. [DOI: 10.1016/j.cjche.2016.08.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Armaghan M, Amini MM, Khavasi HR, Zhang WH, Ng SW. Inorganic–organic hybrid sorbent for aromatic desulfurization of hydrocarbons: regenerative adsorption based on a charge-transfer complex. RSC Adv 2016. [DOI: 10.1039/c6ra17453a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Inorganic–organic hybrid materials for aromatic desulfurization based on the charge-transfer complex (CTC) of 4,6-dimethyldibenzothiophene:1,5-dichloro-4,8-dinitro-anthraquinone.
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Affiliation(s)
- Mahsa Armaghan
- Department of Chemistry
- Shahid Beheshti University
- Tehran 198396311
- Iran
- Department of Chemistry
| | - Mostafa M. Amini
- Department of Chemistry
- Shahid Beheshti University
- Tehran 198396311
- Iran
| | - Hamid R. Khavasi
- Department of Chemistry
- Shahid Beheshti University
- Tehran 198396311
- Iran
| | - Wen-Hua Zhang
- Institute of Materials Research and Engineering
- A* STAR
- Singapore
| | - Siek Weng Ng
- Department of Chemistry
- University of Malaya
- Kula Lumpur
- Malaysia
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9
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Sidorov AV, Eremina OE, Veselova IA, Goodilin EA. Polymer-coated substrates for surface enhanced Raman spectroscopy. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.11.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Tang XD, Zhang YF, Li JJ, Zhu YQ, Qing DY, Deng YX. Deep Extractive Desulfurization with Arenium Ion Deep Eutectic Solvents. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00291] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-dong Tang
- State
Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yong-fen Zhang
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Jing-jing Li
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Yuan-qiang Zhu
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Da-yong Qing
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
| | - Ya-xin Deng
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
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11
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Sidorov A, Vashkinskaya O, Grigorieva A, Shekhovtsova T, Veselova I, Goodilin E. Entrapment into charge transfer complexes for resonant Raman scattering enhancement. Chem Commun (Camb) 2014; 50:6468-70. [DOI: 10.1039/c4cc01550a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Gao J, Chen X, Ren N, Wu W, Li C, Meng H, Lu Y. Acylation desulfurization of oil via reactive adsorption. AIChE J 2013. [DOI: 10.1002/aic.14068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jiajun Gao
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Xingyu Chen
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Nannan Ren
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wenjiao Wu
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Chunxi Li
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Hong Meng
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Yingzhou Lu
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
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13
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Gao J, Meng H, Lu Y, Zhang H, Li C. A carbonium pseudo ionic liquid with excellent extractive desulfurization performance. AIChE J 2012. [DOI: 10.1002/aic.13869] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Hong Meng
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing; 100029; China
| | - Yingzhou Lu
- College of Chemical Engineering; Beijing University of Chemical Technology; Beijing; 100029; China
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14
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Gao JJ, Li HQ, Zhang HX, Lu YZ, Meng H, Li CX. Removal Mechanism of Thiophenic Compounds in Model Oil by Inorganic Lewis Acids. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202831p] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia-jun Gao
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Hong-qiang Li
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Hong-xing Zhang
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Ying-zhou Lu
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Hong Meng
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Chun-xi Li
- State
Key Laboratory of Chemical Resource Engineering and ‡College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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15
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Favre-Réguillon A, Sévignon M, Rocault M, Schulz E, Lemaire M. Deep Desulfurization of Diesel Feedstock by Selective Adsorption of Refractory Sulfur Compounds. Ind Eng Chem Res 2008. [DOI: 10.1021/ie801065z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alain Favre-Réguillon
- Université de Lyon, F-69622 Lyon, France, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 boulevard du 11 novembre 1918, 69100 Villeurbanne, France, Conservatoire National des Arts et Métiers, CNRS, UMR 7084, Laboratoire des Transformations Chimiques et Pharmaceutiques, 2 rue Conté, 75003 Paris, France, and Equipe de Catalyse Moléculaire, ICMMO, UMR 8182, Université Paris-Sud 11, Bât 420, 91405 Orsay Cedex, France
| | - Marc Sévignon
- Université de Lyon, F-69622 Lyon, France, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 boulevard du 11 novembre 1918, 69100 Villeurbanne, France, Conservatoire National des Arts et Métiers, CNRS, UMR 7084, Laboratoire des Transformations Chimiques et Pharmaceutiques, 2 rue Conté, 75003 Paris, France, and Equipe de Catalyse Moléculaire, ICMMO, UMR 8182, Université Paris-Sud 11, Bât 420, 91405 Orsay Cedex, France
| | - Muriel Rocault
- Université de Lyon, F-69622 Lyon, France, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 boulevard du 11 novembre 1918, 69100 Villeurbanne, France, Conservatoire National des Arts et Métiers, CNRS, UMR 7084, Laboratoire des Transformations Chimiques et Pharmaceutiques, 2 rue Conté, 75003 Paris, France, and Equipe de Catalyse Moléculaire, ICMMO, UMR 8182, Université Paris-Sud 11, Bât 420, 91405 Orsay Cedex, France
| | - Emmanuelle Schulz
- Université de Lyon, F-69622 Lyon, France, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 boulevard du 11 novembre 1918, 69100 Villeurbanne, France, Conservatoire National des Arts et Métiers, CNRS, UMR 7084, Laboratoire des Transformations Chimiques et Pharmaceutiques, 2 rue Conté, 75003 Paris, France, and Equipe de Catalyse Moléculaire, ICMMO, UMR 8182, Université Paris-Sud 11, Bât 420, 91405 Orsay Cedex, France
| | - Marc Lemaire
- Université de Lyon, F-69622 Lyon, France, CNRS, UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 boulevard du 11 novembre 1918, 69100 Villeurbanne, France, Conservatoire National des Arts et Métiers, CNRS, UMR 7084, Laboratoire des Transformations Chimiques et Pharmaceutiques, 2 rue Conté, 75003 Paris, France, and Equipe de Catalyse Moléculaire, ICMMO, UMR 8182, Université Paris-Sud 11, Bât 420, 91405 Orsay Cedex, France
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16
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Tian F, Wu W, Jiang Z, Liang C, Yang Y, Ying P, Sun X, Cai T, Li C. The study of thiophene adsorption onto La(III)-exchanged zeolite NaY by FT-IR spectroscopy. J Colloid Interface Sci 2006; 301:395-401. [PMID: 16765370 DOI: 10.1016/j.jcis.2006.05.017] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2006] [Revised: 05/04/2006] [Accepted: 05/06/2006] [Indexed: 11/16/2022]
Abstract
Zeolites NaY and LaNaY (ion-exchanged with aqueous lanthanum nitrate solution) were used as adsorbents for removing organic sulfur compounds from model gasoline solutions (without and with toluene) and fluid catalytic cracked gasoline in fixed-bed adsorption equipment at room temperature and atmosphere pressure. The adsorptive selectivity for organic sulfur compounds was significantly increased when Na(+) ions in zeolite NaY were exchanged with lanthanum ions. IR spectra of thiophene adsorption indicate that thiophene is adsorbed onto La(3+) ions via direct S-La(3+) interaction and Na(+) ions via pi-electronic interaction for La(3+)-exchanged zeolite NaY, but only via pi-electronic interaction with Na(+) ions for NaY. The amount of adsorbed thiophene on La(3+)-exchanged zeolite Y was slightly decreased by coadsorption of benzene, but greatly reduced on NaY. The adsorption of thiophene via interaction with La(3+) on La(3+)-exchanged zeolite Y is hardly replaced by benzene coadsorption. The direct S-La(3+) interaction might be the essential reason for the evidently improved adsorptive selectivity of LaNaY for removing organic sulfur compounds from solutions containing large amount of aromatics.
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Affiliation(s)
- Fuping Tian
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O. Box 110, Dalian 116023, China
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17
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Bianchini C, Meli A, Vizza F. Role of single-site catalysts in the hydrogenation of thiophenes: from models systems to effective HDS catalysts. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.05.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Breysse M, Djega-Mariadassou G, Pessayre S, Geantet C, Vrinat M, Pérot G, Lemaire M. Deep desulfurization: reactions, catalysts and technological challenges. Catal Today 2003. [DOI: 10.1016/s0920-5861(03)00266-9] [Citation(s) in RCA: 215] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Matsuzawa S, Tanaka J, Sato S, Ibusuki T. Photocatalytic oxidation of dibenzothiophenes in acetonitrile using TiO2: effect of hydrogen peroxide and ultrasound irradiation. J Photochem Photobiol A Chem 2002. [DOI: 10.1016/s1010-6030(02)00004-7] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Tanaka M, Tanifuji N, Hatada S, Kobayashi K. Solid-state solvolysis of thiophene-substituted trityl-type alcohols: nucleophilic substitution induced by gas-solid contact. J Org Chem 2001; 66:803-8. [PMID: 11430099 DOI: 10.1021/jo001291x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The nucleophilic substitution reaction by gas-solid contact has been investigated. When 9-thienothienylfluoren-9-ol derivatives were coground with dichlorodicyanoquinone (DDQ) and then exposed to methanol vapor, the corresponding 9-methoxyfluorenes were obtained in 15-70% yields. Throughout the whole procedure the solid state was retained. The generation of a radical cation in the coground solids via charge-transfer interaction between the substrate alcohol and DDQ was suggested by the ESR spectrum. The mechanism involving the collapse of the radical cation to generate a proton, which acts as a catalyst to afford the carbocation, was deduced based on the electrochemical oxidation of the substrate in solution. The propagation of the substitution reaction in the solid state has been shown for the carbocation upon contact with methanol vapor. The crystalline inclusion compounds of 9-thienothienylfluoren-9-ol derivatives incorporating methanol as a guest were exposed to HCl gas. This gas-solid reaction also led to the formation of the corresponding methoxy compounds maintaining the solid state. Through this work a new consequence of solid-state cogrinding is deduced.
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Affiliation(s)
- M Tanaka
- Department of Chemistry, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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