Papers by Stephane Anguille
HAL (Le Centre pour la Communication Scientifique Directe), Jul 9, 2018
ChemInform, Jan 21, 2003
Polyphenylalkene derivatives Q 0740 The Direct Use of Phenyldimethylsilanes in Silicon Assisted P... more Polyphenylalkene derivatives Q 0740 The Direct Use of Phenyldimethylsilanes in Silicon Assisted Palladium Catalyzed Cross Coupling.-The vinyl silanes (I) and (V) are used as masked vinyl organometallics for cross coupling reactions with phenyl iodide (III) to provide the corresponding cine substitution products (IV) and (VI) in high yields. The analogous reaction with silane (VII) only affords the protodesilylation product (VIII).-(ANDERSON*, J.
Chemical Engineering & Technology, Sep 16, 2021
Hybrid processes have received more attention in pollutant removal due to the combination of adva... more Hybrid processes have received more attention in pollutant removal due to the combination of advantages of each process. A membrane combined with absorption was developed and studied for the removal of volatile organic compounds (VOCs) from lab to industrial scale. The ionic liquid membrane containing 1-butyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([Bmim][NTf 2 ]) showed competitive absorption on toluene. An industrial-length ionic liquid membrane was investigated under optimized conditions based on lab-scale results for a long time. The arrangement of the membrane modules was also evaluated, including connection in series and parallel. As a result, the proposed ionic liquid membrane is highly promising for industrial applications.
HAL (Le Centre pour la Communication Scientifique Directe), Mar 15, 2021
The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) unde... more The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) under real conditions requires working in a humid environment. It is well known that the humidity reduces the performances of gas sensors, particularly in terms of sensitivity. Using a filter based on an ionic liquid (IL), low concentrations of BTEX can be detected with a tungsten trioxide (WO3) thin film (50 nm) deposited by reactive radio frequency (RF) magnetron sputtering on a transducer which has developed in IM2NP laboratory. With this absorption upstream, we are able to detect 500 ppb of BTEX gases without a sensor sensitivity decrease with 50% relative humidity in the inlet feed. Keywords-gas sensor; humidity removal; tungsten trioxide; ionic liquid based filter.
Air quality has become a hot issue of common concern, particularly BTEX gases (Benzene, Toluene, ... more Air quality has become a hot issue of common concern, particularly BTEX gases (Benzene, Toluene, Ethylbenzene and Xylene). They often cause serious environmental problems and have negative effect on human health even at very low concentration. Gas sensors have been in use for monitoring flammable as well as toxic gases. Since a few years, metal oxide gas sensor are also used to the control and monitor the air quality The detection of gaseous pollutants under real conditions requires working in a humid environment. It is well known that the humidity reduces the performances of gas sensors, particularly in terms of sensitivity. In this work, we demonstrated the possibility to reduce the humidity impact on a metal oxide sensor by using ionic liquid-based filter, without modification of the sensor sensitivity.
The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) unde... more The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) under real conditions requires working in a humid environment. It is well known that the humidity reduces the performances of gas sensors, particularly in terms of sensitivity. Ionic liquids (ILs) are a new class of solvent with attractive properties for the extraction of volatile organic compounds (VOCs) or gases. Moreover, the ILs are particularly interesting because of their recycling ability and without atmospheric pollution. Low concentrations of BTEX are detected with a tungsten trioxide (WO3) thin film (50 nm) deposited by reactive RF magnetron sputtering on a transducer developed in our laboratory. Using a filter based on a mixed ionic liquid ([Bmim][Br][Bmim][PF6]), we are able to detect 500 ppb of BTEX gases without a sensor sensitivity decrease with 50 % relative humidity.
The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) unde... more The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) under real conditions requires working in a humid environment. It is well known that the humidity reduces the performances of gas sensors, particularly in terms of sensitivity. Ionic liquids (ILs) are a new class of solvent with attractive properties for the extraction of volatile organic compounds (VOCs) or gases. Moreover, the ILs are particularly interesting because of their recycling ability and without atmospheric pollution. Using a filter based on a mixed ionic liquid ([Bmim][Br]-[Bmim][PF6]), low concentrations of BTEX are detected with a tungsten trioxide (WO3) thin film (50 nm) deposited by reactive RF magnetron sputtering on a transducer developed in our laboratory. With this filter upstream, we are able to detect 500 ppb of BTEX gases without a sensor sensitivity decrease with 50 % relative humidity.
Chemical Engineering Journal, 2021
Ionic liquids (ILs) are promising alternative solvents for traditional organic compounds using se... more Ionic liquids (ILs) are promising alternative solvents for traditional organic compounds using selective separation. However, some environmental risks of ILs, resulting in a limitation of their applications in industry. In this work, the stability of ILs into multi-channel tubular ceramic membranes (ILM) provides a promising way to realize the use of ILs with environmental damages reducing. This novel process has been investigated for toluene removal from a toluene/air gas mixture based on 1-butyl-3-imidazolium bis(trifluoromethylsulfonyl)amide ([Bmim][NTf 2 ]) as a liquid sorbent. In addition, the effects of operating conditions on toluene separation were studied and discussed by experiment and modeling. The absorption capacity of toluene by the ILM on proposed operating conditions was around 224.74 mg per gram of the ionic liquid. The support ceramic membrane can effectively prevent ILs leakage from causing secondary waste and ensure longtime operation. Regeneration of polluted ILM was available.
Membranes, 2019
Membrane processes are promising methods to separate gases from feed streams without phase changi... more Membrane processes are promising methods to separate gases from feed streams without phase changing. A hybrid process, the combination of ionic liquids with a ceramic membrane (ILM), has been developed for humidity removal in a green continuous process. This new concept provides a more efficient and available ionic liquid (IL)-based membrane regeneration process, which just switches the moist feed stream to dry air. Furthermore, the ILM presents high stability and mechanical resistance during long-time operation. In addition, the influences of several operating parameters, including flow rate, temperature, absolute pressure, and feed concentration on process efficiency were investigated. The lower inlet flow rate was found to be favorable for drying humid air. Moreover, when the pressure increased, the mass of absorbed water was increased, while the feed concentration had no significant effects on the membrane separation performance. However, the operating temperature had a great ef...
Separation and Purification Technology, 2019
Combination of membrane processes and ionic liquids have received more and more attention in poll... more Combination of membrane processes and ionic liquids have received more and more attention in pollutants removal because it enhances separation efficiency but also broaden their research and application areas. This review provides a first and systematical summary on ionic liquids incorporate in membrane processes for VOCs or CO2 separation, including supported ionic liquid membranes (SILMs), ILs composite polymer membranes (ILPMs), ionic liquids composite mixed matrix membranes (ILMMMs), poly(ionic liquid)s membranes (PILMs), ionic liquid gel membranes (ILGMs), and ionic liquid membrane contactors (ILMCs). Moreover, a new concept, combination of the membrane separation processes and absorption processes of ionic liquids, is introduced. Those separation processes are described detailly and compared with other conventional processes. With their separation performances and the processes of regeneration, membrane contactor shows stronger competitive advantages and it has the potential to be a major process in VOCs and CO2 separation. The advantages and disadvantages posed by all present ionic liquid membrane processes are summarized. Finally, challenges and opportunities in ionic liquid membrane separation processes are identified and discussed.
Http Www Theses Fr, 2000
AIX-MARSEILLE2-BU Sci.Luminy (130552106) / SudocSudocFranceF
International Journal of Photoenergy, 2003
ChemInform, 2013
An unprecedented formal [3 + 3]-cyclodehydration approach leads to the synthesis of N-alkyl and N... more An unprecedented formal [3 + 3]-cyclodehydration approach leads to the synthesis of N-alkyl and N-arylsubstituted 2-pyridones from β-ketoamides and primary or secondary propargylic alcohols.
Organometallics, 2006
Platinum(II) bromide catalyzes the reaction of aniline with n-Bu 3 N to give N-butylaniline and 2... more Platinum(II) bromide catalyzes the reaction of aniline with n-Bu 3 N to give N-butylaniline and 2-propyl-3-ethylquinoline. The formation of the quinoline derivative is strongly favored (TON up to 40) by the presence of both n-Bu 4 PBr and 1-hexene. The same reaction products are formed by reaction of aniline with either n-Bu 2 NH or n-BuNH 2 (PtBr 2 catalyst). Under similar experimental conditions, the "PtBr 2n-Bu 4 PBr-1-hexene" system catalyzes the transformation of N-hexylaniline into 2-pentyl-3-butylquinoline (TON up to 42). Similarly, N-ethylaniline affords 2-methylquinoline (TON of 22). In both cases, the presence of 1-hexene strongly favors the conversion of the N-alkylaniline. On the basis of both complementary experiments and literature data, these unprecendented results are interpreted by an R-C-H activation of n-Bu 3 N (iminium species as intermediate), leading to N-butylaniline (butyl group transfer to aniline). The "PtBr 2-n-Bu 4 PBr-1-hexene" system also catalyzes an R-C-H activation of the alkyl part of N-(n-alkyl)anilines to generate the corresponding imines, which dimerize. A heterocyclization then occurs, via a Pt(II)-catalyzed aromatic ortho-C-H activation, followed by deamination and dehydrogenation (1-hexene as hydrogen acceptor). Although not completely clear, the role of an alkene (1-hexene or ethylene) is highlighted.
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 2000
The synthesis of a series of 2-ferrocenyl-2-methyl-[2H]-benzopyranes and the results of a spectro... more The synthesis of a series of 2-ferrocenyl-2-methyl-[2H]-benzopyranes and the results of a spectrokinetic study are presented. A broadening of the absorption band in the visible range and the apparition of a second absorption band is observed as compared with the reference compounds. Furthermore important kinetic modifications are observed. From these results a structure can be proposed for a permanent opened
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 2000
ABSTRACT
Journal of Molecular Catalysis A: Chemical, 2007
Ionic liquids such as n-Bu 4 PX salts (X = Cl − , Br − , I −) have a strong promoting effect for ... more Ionic liquids such as n-Bu 4 PX salts (X = Cl − , Br − , I −) have a strong promoting effect for the Pt(II)-catalyzed hydroamination of ethylene and 1-hexene with aniline. In the case of ethylene, n-Bu 4 PBr is the most efficient activator, whereas n-Bu 4 PI is even more efficient in the case of 1-hexene. A special effect of molecular iodine has also been pointed out. Most notably, Pt(IV) precursors are also shown to be active for the hydroamination of ethylene. As for Pt(II) precursors, Pt(IV)-n-Bu 4 PX associations exhibit enhanced catalytic activities.
Journal of Molecular Catalysis A: Chemical, 2013
The catalytic system «PtBr 2 (0.3 mol%)/2P(OR) 3 /10nBu 4 PBr» (R = alkyl) discovered recently in... more The catalytic system «PtBr 2 (0.3 mol%)/2P(OR) 3 /10nBu 4 PBr» (R = alkyl) discovered recently in our group, allows good to excellent catalytic activities for the intermolecular hydroamination of ethylene and higher α-olefins (1-hexene) with aniline type amines to give the expected N-ethyl-(1) and N,N-diethyl-anilines (2) along with 2-methyl-quinoline (3). A poisoning effect of alkyl and aromatic phosphines has been observed. This effect could be minimized using small amounts of molecular iodide which reacts with phosphorus ligands to form non-coordinating well-described ionic species. Interestingly, beneficial effects of added P(OR) 3 (R = alkyl) have been pointed out and further investigated. In this way, a new potential family of Arbuzov-type phosphorus-metal complexes has been suggested to be responsible for good catalytic activities found when using P(OR) 3 alkyl phosphites rather than PR 3 (R = alkyl, aromatic) and P(OPh) 3 co-catalysts.
Heterocyclic Communications, 1998
The synthesis and the photochromic properties of a new family of naphthopyrans substituted in the... more The synthesis and the photochromic properties of a new family of naphthopyrans substituted in the-3 position by a ferrocenyl group are presented. The photochromic behaviour of these compounds is compared with the parent-3,3-diphenyl-naphthopyrans ones. It shows quite original photochromic properties: extended wavelength range in the visible absorption spectrum, sensitivity of the spectrokinetic parameters to the annellation type.
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Papers by Stephane Anguille