EP2972228A1 - Procédé et dispositif de détection colorimétrique ou de dosage de traces de composés organiques toxiques dans l'air - Google Patents
Procédé et dispositif de détection colorimétrique ou de dosage de traces de composés organiques toxiques dans l'airInfo
- Publication number
- EP2972228A1 EP2972228A1 EP14713595.8A EP14713595A EP2972228A1 EP 2972228 A1 EP2972228 A1 EP 2972228A1 EP 14713595 A EP14713595 A EP 14713595A EP 2972228 A1 EP2972228 A1 EP 2972228A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- metal complex
- chosen
- organophosphorus
- following
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 230000002588 toxic effect Effects 0.000 title description 2
- 150000002903 organophosphorus compounds Chemical class 0.000 claims abstract description 34
- 239000003446 ligand Substances 0.000 claims abstract description 20
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
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- 239000011780 sodium chloride Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 230000000946 synaptic effect Effects 0.000 description 1
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- GYUURHMITDQTRU-UHFFFAOYSA-N tributyl(pyridin-2-yl)stannane Chemical compound CCCC[Sn](CCCC)(CCCC)C1=CC=CC=N1 GYUURHMITDQTRU-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
- G01N31/224—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols for investigating presence of dangerous gases
Definitions
- the invention relates to the use of a metal complex for the detection and / or quantification of organophosphorus compounds by colorimetry.
- It also relates to a method for detecting and / or quantifying organophosphorus compounds by colorimetry and a colorimetric device for detecting and / or quantifying organophosphorus compounds.
- the detection and / or quantification of organophosphorus compounds according to the invention is carried out on a gaseous sample or in solution in an unknown solvent (polar or apolar).
- organophosphoric molecules The rapid and efficient detection by rapid colorimetric measurement of organophosphoric molecules is a major issue to protect soldiers in combat zones but also the civilian population in the face of the terrorist risk. Detection of organophosphorus pesticides which provides an indication of their concentrations in the air is also a major issue in order to determine, for example, the level of protection required for a possible intervention, but also to locate and define the limits of contamination and to determine the effectiveness of a decontamination procedure.
- organophosphorus compounds such as organophosphonates, organophosphates, and by extension any organic molecule containing a phosphorus atom in its chemical structure - is a family of molecules with a wide range of toxicity, including harmful compounds.
- chemical weapons acting on the central nervous system such as Sarin, Tabun or Soman.
- These innervating agents represent one of the most important lethal classes of chemical weapons.
- OPs are potent inhibitors of serine proteases and more particularly of acetylcholinesterase, which plays a critical role in synaptic communication. Given the lethality of these chemical weapons, their availability, and their relatively easy synthesis, the POs are of interest to terrorists (Sarin attack, Tokyo Metro, 1995).
- a chemical sensor is a composite device capable of providing a response that alerts, identifies, or even quantifies the presence of an analyte.
- the principle of a chemical sensor is based on a sensitive material with an exploitable physical property that will allow the detection of an analyte.
- These techniques include ion mobility spectroscopy, flame photometry, infrared and Raman spectroscopy, fluorescence sensors, colorimetric indicators, semiconductor detectors, and the like.
- the main devices that are currently among the most used for the detection of these agents are as follows.
- IMS ion mobility spectroscopy
- the detection principle makes it possible to distinguish ionized molecules according to their masses, charges and mobilities in the gas phase, in the presence of an electric field.
- the arrival of the ions on the electrical detector generates a characteristic signal which is compared with a database to possibly trigger an alarm.
- the selectivity observed is relatively mediocre because of the non-discriminating ionization process that leads to many false positives.
- environmental effects such as temperature, pressure and humidity can have significant effects on the response of the IMS type detector.
- Emission flame photometry is particularly suitable for detecting organophosphorus compounds: the organophosphorus and sulfur derivatives contained in the air each emit radiation of different wavelength after passing through an air-hydrogen flame.
- Very high sensitivity to any trace of phosphorus or sulfur can be problematic because there are a large number of sources of phosphorus or sulfur in the environment (exhaust fumes, pesticides, fertilizers, solvents, inorganic sulfur and phosphorus ).
- a device for detecting organophosphorus compounds comprising an electrical device comprising a source electrode and a drain electrode separated by a semiconductor material, characterized in that at least a receptor molecule is grafted on one of the electrodes or on the semiconductor material, and a device for detecting the variation of the positive charges.
- This detection although specific, has various disadvantages. First, it requires to be implemented in a low light environment which requires at least a rollover. In addition, semiconductor materials are often sensitive to oxygen, moisture and atmospheric interferents. In addition, highly acidic vapors can generate false positives. Finally, the electronics associated with the operation of such a sensor is bulky (Agilent 4155 device controlled by a computer) which limits the portability of the device.
- Triple-purpose detector paper is also widely used. This vesicant and neurotoxic detection system is based on a chromogenic technique.
- the PDF1 type detector paper contains three different dyes that can detect the presence of neurotoxic agents G, V or vesicants. It is the same for the M8 / M9 detection paper, but this type of detector can only be used on liquids and generates many false positives (brake fluid, antifreeze, anti-mosquito ).
- NAVD neurotoxic vapor detector
- the detection devices of organophosphorus compounds currently available have various disadvantages such as a lack of selectivity, sensitivity, a false positive rate too high or too large a size to be portable.
- Some sensors can only be used to test a sample in solution, others require a low light environment or some are influenced by environmental variations (temperature, pressure, humidity).
- the main challenges are to improve the reliability of detection by decreasing the false-positive rate.
- the sensors must be sensitive enough to detect the target at concentrations below the exposure limit value (ELV) and fast enough to allow for effective warning and to allow for the implementation of adequate safeguards and intervention. fast medical for example.
- EUV exposure limit value
- the invention proposes the use of a metal complex of formula I below:
- L is a ligand comprising at least one unit of formula II below:
- X is selected from OH, NH 2 and SH,
- M is selected from Fe, Cu, Ni, Co, Ru, Os, Zn, Ir, Ag, Cd and Mn,
- a " is a counterion selected from Cl “ , PF “ 6 , C10 4 “ , BF ⁇ , and Br " , the colorimetric detection of organophosphorus compounds.
- L has the following formula ⁇ ' Formula ⁇
- X is OH, SH or NH 2 ,
- L is selected from the ligands
- M is Fe
- the metal complex is chosen from the following complexes of formulas:
- the metal complex is in solution.
- the metal complex is deposited on a paper support. In a third embodiment, the metal complex is in a gel.
- the invention also proposes a method for detecting and / or quantifying organophosphorus compounds, characterized in that it comprises bringing the liquid, solid or gaseous sample, which may contain organophosphorus compounds, into contact with a complex metallic compound of formula I:
- L is a ligand comprising at least one unit of formula II below:
- X is selected from OH, NH 2 and SH
- M is selected from Fe, Cu, Ni, Co, Ru, Os, Zn, Ir, Ag, Cd and Mn,
- a " is a counterion selected from Cl “ , PF “ 6 , C10 4 “ , BF 4 “ , and Br “ , and detecting the color change of the metal complex.
- L has the following formula:
- X is OH, SH or NH 2 ,
- M is Fe
- the metal complex is chosen from the complexes of formulas:
- a " is CF or PF " 6 .
- the metal complex is in solution.
- the metal complex is deposited on a paper support.
- the metal complex is in a gel.
- the invention also proposes a device for detecting and / or quantifying organophosphorus compounds, characterized in that it comprises a support comprising a metal complex of formula I below:
- L is a ligand comprising at least one unit of formula II below:
- X is selected from OH, N3 ⁇ 4 and SH,
- M is selected from Fe, Cu, Ni, Co, Ru, Os, Zn, Ir, Ag, Cd and Mn,
- the ligand L has the formula
- X is OH, SH or NH 2 ,
- the ligand L of the metal complex is chosen from the following ligands:
- M is Fe.
- the metal complex is chosen from the following complexes of formulas:
- the medium is a solution.
- the support is a strip of paper.
- the support is a gel.
- the invention proposes to detect organophosphorus compounds present in a liquid or in gaseous form by colorimetry.
- the colorimetric device proposed by the invention comprises a dye immobilized on a solid support, which may be a gel, a paper, in particular an absorbent, or a solid support, or may be in solution.
- a solid support which may be a gel, a paper, in particular an absorbent, or a solid support, or may be in solution.
- image and automatic image processing by RGB comparison Red Green Blue, which is a color coding format).
- bipyridines 2,2'-bipyridines
- metals such as Fe, Cu
- bipyridines aromatic molecules capable of complexing numerous metals such as Fe, Cu
- dyes / chromophores Ni, Co, Ru, Os, Zn, Ir, FAg, Cd, Mn, etc.
- bipyridines adopt a trans conformation to minimize repulsion between the non-binding doublets of the nitrogens.
- the invention is based on the discovery that when exposing such a metal complex comprising a bypyridine ligand having at least one pyridine subunit having the following Formula II:
- X is selected from OH, N3 ⁇ 4 and SH,
- M is selected from Fe, Cu, Ni, Co, Ru, Os, Zn, Ir, Ag, Cd and Mn
- a " is a counterion selected from Cl “ , PF “ 6 , CIO 4 * , BF 4 “ and Br “ , to organophosphorus compounds, discoloration of the complex occurred.
- This subunit of formula II is also called in the following receptor molecule.
- This subunit of the metal complex reacts with the organophosphorus compounds according to the following reaction:
- terpyridines are part of the family of bipyridines.
- leaving group is meant a leaving group, nucleofuge, that is to say a group capable of being substituted by a nuciéophil group during a nuciéophilous attack.
- leaving groups mention may in particular be made of halogen atoms, in particular bromine, chlorine and fluorine atoms, and AlkO-, AlkS- groups, where Alk represents an alkyl group comprising from 1 to 6 carbon atoms. and ArO-, ArS- where Ar is substituted or unsubstituted aryl.
- X is located near the nitrogen of pyridine.
- the exposure of the receptor molecule to an organophosphorus compound leads to the formation of an unstable ester-phosphate, or amide-phosphate or thioester-phosphate intermediate after reaction of the pyridine nitrogen with the target molecule.
- This unstable phosphate-ester or amide-phosphate or thioester-phosphate evolves during a second reaction when pyridine is attacked on the phosphate-carrying X atom to form a cyclized compound having a localized load on nitrogen. This reaction engages the pyridine-free nitrogen doublet that is no longer available to complex a metal.
- the metal complex used in the invention has the following general formula I:
- L is a ligand comprising at least one unit of formula II below: Formula II in which:
- X is selected from OH, NH 2 and SH,
- M is selected from Fe, Cu, Ni, Co, Ru, Os, Zn, Ir, Ag, Cd and Mn,
- a " is a counterion selected from Cl “ , PF “ 6 , C10 4 “ , BF 4 “ , and Br “ .
- X is OH, SH or NH 2 ,
- these receptor molecules retain their reactivities when complexed to a metal. Indeed, it is surprising that the nitrogen of the pyridine reactive function is likely to react while it is already engaged in coordination with the metal and it is not in good conformation to react.
- L represents a ligand or a molecule of solvent and M a transition metal preferring the octahedral complexing modes (Fe, Ru, Os, Co ).
- the decomplexation reaction of bipyridines is accompanied by a change in color from red to yellow-green.
- the complexes used in the invention comprising bypyridine ligands may be tetrahedral or square (Cu, Ni, ...) or octahedral planar. The mechanism of decomplexation is the same.
- metal complexes may be soluble in water and polar solvents such as alcohols if the counterion chosen is a CF chloride. They can be soluble in nonpolar solvents if the against-ion selected is a phosphate hexafluoride PF ⁇ 6.
- the metal of the metal complex is iron.
- the metal complex is chosen from the following complexes of formulas:
- the metal complex may be dissolved or deposited on a paper support, in particular an absorbent support, or in a gel.
- the invention also proposes a method for detecting and / or quantifying organophosphorus compounds which comprises contacting the liquid, solid or gaseous sample capable of containing organophosphorus compounds with a metal complex as defined above, and the observation of the color change of the metal complex.
- the invention also proposes a device for detecting and / or quantifying organophosphorus compounds, characterized in that it comprises a support comprising a metal complex as described above and a means for detecting color variation, which can be an automatic and autonomous device like image sensor or simply the eye.
- Step 1
- the mixture is refluxed for about 3 hours, after returning to ambient temperature, the product is extracted twice with ethyl acetate.
- the organic phases are combined, washed with saturated sodium hydrogencarbonate solution, dried over magnesium sulphate, filtered and concentrated to dryness.
- the yellow oil obtained is dissolved in 15 ml of anhydrous methanol, the mixture is brought to 0 ° C., and then the sodium borohydride (149.5 mg, 3.95 mmol) is added and the mixture is stirred at this temperature. min. After adding a saturated solution of ammonium chloride, the product is extracted 3 times with ethyl acetate. The organic phases are dried over magnesium sulphate, filtered and evaporated under reduced pressure. Purification on silica gel (pentane / ethyl acetate 1: 1) afforded the compound as a colorless oil (41 mg, 58%).
- the compound 2 (203 mg, 1.0 mmol) is dissolved in 10 mL of anhydrous dichloro-dehane, followed by imidazole (11 mg, 1.63 mmol) and dimethylaminopyridine (13 mg, 0.11 mmol). ) and tert-butyldimethylchlorosilane (183 mg, 1.21 mmol) are added.
- the mixture is stirred overnight at room temperature and then distilled water is added.
- the phases are separated, and then the aqueous phase is extracted twice with dichloromethane.
- the organic phases are combined, washed with distilled water, dried over magnesium sulfate, filtered and concentrated. Purification on silica gel (96: 4 dichloromethane / methanol) makes it possible to obtain the compound in the form of a colorless oil (303 mg, 96%)
- compound 5 (70 mg, 22 mmol) is dissolved in 10 mL of THF and tetrabluorylammonium fluoride (1 M in THF, 0.65 mL, 0.65 mmol) is introduced. The mixture is stirred for 2 hours at room temperature and then distilled water and dichloromethane are added. The phases are separated, the aqueous phase is extracted with dichloromethane, and the organic phases are washed with water. The organic phases are dried over magnesium sulfate, filtered and concentrated. Purification on silica gel (dichloromethane / methanol 95: 5) gives the compound as a colorless oil (20 mg, 45%).
- 6-bromo-2,2'-bipyridin 400 mg, 1.7 mmol
- 15 mL of anhydrous THF 15 mL
- n-butyllithium 2.5 M in hexane, 0.75 mL, 1.87 mmol
- Stirring is maintained at -80 ° C for 40 minutes and then tributyltin chloride is introduced.
- the solution is stirred for 30 minutes allowing the mixture to slowly return to room temperature and then distilled water is added.
- the compound is extracted several times with diethyl ether, and the organic phases are washed with water. .
- the organic phases are dried over magnesium sulfate, filtered and concentrated. Purification on silica gel (pentane / ethyl acetate 9: 1) afforded the compound as a yellow oil (220 mg, 30%).
- a drop of a solution containing the organophosphorus molecule (diphenylchlorophosphate - DPCP) to be detected is added to 1 ml of a 1 mM solution of the compound of formula II in which the counterion is CF, the iron dichloride (II). tris [2- (2-pyridinyl) -3-ethano-pyridine] (6.2C1). After 10s, the previously red solution changes color to become pale yellow. This color change is instant but the fading takes 10s.
- Example 6 Colorimetric Detection of the presence of organophosphate molecules present in solution in the gas phase by means of an impregnated paper of the metal complex of formula I-3 wherein the anion is PF "6 (6.2 PF 6) .
- a filter paper is soaked in an ImM solution of 6.2PF6 in acetonitrile for 2 min and then dried in an oven at 100 ° C for 10 min. The resulting paper is red.
- Colored filter paper does not change color when exposed to vapors of:
- Example 7 Colorimetric detection of organophosphorus diphenylchlorophosphate molecules present in a gaseous phase using a paper impregnated with the metal complex of formula 1-2 in which the counterion is PF " 6 .
- a filter paper is soaked in a solution of (12.2PF6) in acetonitrile for 2 min and then dried in an oven at 100 ° C for 10 min. The resulting paper is red.
- Example 8 Detection of organophosphorus diphenylchlorophosphate molecules present in a gaseous phase using a gel colored with the metal complex of formula 1-1 in which the counterion is Cl " .
- the gels are produced by polymerization of tetramethoxysilane or triethoxypropylsilane in a methanol / water mixture in the presence of 0.1% by weight dye (6.20) in solution in DI water and CTAB (cetyl ammonium bromide) 8.2 10 -3 M in methanol
- the mixture is passed into an ultrasonic bath sonicated twice for 5 min and then left at ambient temperature for 5 days to allow the polymerization to take place and evaporation of the solvents, and the sol-gel is then dried at room temperature. oven at 45 ° C for 2 days
- the gel is red
- the gel When the gel is exposed to vapors containing organophosphorus diphenylchlorophosphate molecules, the gel changes from red to yellow in 20 seconds.
- the colored gel does not change color when exposed to vapors of:
- Example 9 Detection of organophosphorus diphenylchlorophosphate molecules in the gas phase using a gel colored with the metal complex of formula 1-2 in which the counterion A " is Cl " (12.2C1).
- the gels are made by polymerization of tetramethoxysilane or triethoxypropylsilane in a methanol / water mixture in the presence of 0.1% by weight dye (12.2C1) in solution in DI water and CTAB (cetylammonium bromide). "3 M in methanol. the mixture is passed in an ultrasonic bath sonicated two times 5 min and then left at room temperature for 5 days to allow the polymerization to take place and the solvents were evaporated. the sol-gel is then dried in an oven at 45 ° C for 2 days The gel is red.
- the colored gel does not change color when exposed to vapors of:
- the metal complex comprising the subunit of formula II has a very high selectivity for organophosphorus molecules and allows the simple and rapid colorimetric detection of organophosphorus molecules, at very low concentrations.
- the simple structure of the device of the invention and the simple implementation of the method of the invention allows the rapid, low cost and large scale detection of organophosphorus molecules.
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1352226A FR3003352B1 (fr) | 2013-03-13 | 2013-03-13 | Procede et dispositif de detection colorimetrique ou de dosage de traces de composes organiques toxiques dans l'air |
| PCT/IB2014/059590 WO2014141043A1 (fr) | 2013-03-13 | 2014-03-10 | Procédé et dispositif de détection colorimétrique ou de dosage de traces de composés organiques toxiques dans l'air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2972228A1 true EP2972228A1 (fr) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14713595.8A Withdrawn EP2972228A1 (fr) | 2013-03-13 | 2014-03-10 | Procédé et dispositif de détection colorimétrique ou de dosage de traces de composés organiques toxiques dans l'air |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2972228A1 (fr) |
| FR (1) | FR3003352B1 (fr) |
| WO (1) | WO2014141043A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4660800A (en) * | 1999-04-26 | 2000-11-10 | U.S. Army Medical Research And Materiel Command | Immobilized enzymes as biosensors for chemical toxins |
| SG143093A1 (en) * | 2006-11-27 | 2008-06-27 | Dso Nat Lab | Rapid detection of cholinesterase inhibitors |
| FR2934685B1 (fr) | 2008-07-29 | 2010-09-03 | Commissariat Energie Atomique | Detection et/ou quantification electrique de composes organophosphores |
| FR2950436B1 (fr) * | 2009-09-18 | 2013-09-20 | Commissariat Energie Atomique | Appareil et procede de detection et/ou de quantification de composes d'interet presents sous forme gazeuse ou en solution dans un solvant |
-
2013
- 2013-03-13 FR FR1352226A patent/FR3003352B1/fr not_active Expired - Fee Related
-
2014
- 2014-03-10 WO PCT/IB2014/059590 patent/WO2014141043A1/fr not_active Ceased
- 2014-03-10 EP EP14713595.8A patent/EP2972228A1/fr not_active Withdrawn
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| Title |
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| See references of WO2014141043A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3003352B1 (fr) | 2015-04-17 |
| FR3003352A1 (fr) | 2014-09-19 |
| WO2014141043A1 (fr) | 2014-09-18 |
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