showing 16 related works from this author
Surface Acoustic Wave Sensors for the Detection of Hazardous Compounds in Indoor Air
2017
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.; International audience; In this work, the authors show the capabilities of Surface Acoustic Wave (SAW) devices coupled with various absorbents to probe the properties of gas sensitive materials for the manufacturing of hazardous gas sensors. The great capabilities of cobalt corroles for the trapping of carbon monoxide (CO) were exploited to produce selective sensors. These corroles were deposited on SAW delay lines surfaces and then exposed to carbon monoxide (CO) in standard conditions. Concentrations of a few hundreds of ppb were measured emphasizing the interest of such sensors for the detection of CO. Anot…
Synthesis, Characterization, and Electrochemistry of Open-Chain Pentapyrroles and Sapphyrins with Highly Electron-Withdrawing meso -Tetraaryl Substit…
2017
International audience; A series of open-chain pentapyrroles and sapphyrins with highly electron-withdrawing substituents (i.e., CN, CF3 , or CO2 Me) on the meso-phenyl rings was synthesized and characterized as to the spectral properties, protonation reactions, and electrochemistry in non-aqueous media. The investigated compounds are represented as (Ar)4 PPyH3 and (Ar)4 SapH3 where PPy and Sap correspond to the tri-anion of the open-chain pentapyrrole and sapphyrin, respectively, and Ar=p-CNPh, p-CF3 Ph, or p-CO2 MePh. UV/Vis and 1 H NMR spectroscopy as well as mass spectrometry data are given for the confirmation of the structures for the newly synthesized compounds. An X-ray structure fo…
Cobalt Corroles with Bis‐Ammonia or Mono‐DMSO Axial Ligands. Electrochemical, Spectroscopic Characterizations and Ligand Binding Properties
2018
International audience; Four bis-ammonia ligated cobalt corroles and four mono-DMSO ligated cobalt corroles with different mesoaryl substituents on the macrocycle (A 2 Band A 3-corroles) were synthesized and investigated as to their electrochemical and spec-troscopic properties under different solution conditions. The complexation energies of the investigated cobalt corroles were theoretically calculated to illustrate the propensity of the cobalt center for pentacoordination or hexa-coordination with various axial ligands (DMSO, CO, py and NH 3). The structure of one hexacoordinate bis-NH 3 cobalt corrole complex was also determined by X-ray diffraction.
Synthesis, electrochemistry, protonation and X-ray analysis of meso-aryl substituted open-chain pentapyrroles
2019
Five meso-tetraaryl open-chain pentapyrroles were synthesized and characterized as to their electrochemistry and protonation reactions in nonaqueous media. The investigated compounds are represented as (Ar)4PPyH3 where Ar [Formula: see text],[Formula: see text]-F2Ph, [Formula: see text]-BrPh, Ph, [Formula: see text],[Formula: see text],[Formula: see text]-(OMe)3Ph or [Formula: see text]-MePh and were characterized by UV-vis and 1H NMR spectroscopy, mass spectrometry and electrochemistry. Cyclic voltammetry was used to measure redox potentials, while protonation involving the conversion of (Ar)4PPyH3 to [(Ar)4PPyH5][Formula: see text] was monitored by UV-vis absorption spectroscopy. Equilib…
Electrochemistry of Bis(pyridine)cobalt (Nitrophenyl)corroles in Nonaqueous Media
2018
International audience; A series of bis(pyridine)cobalt corroles with one or three nitrophenyl groups on the meso positions of the corrole macrocycle were synthesized and characterized as to their electrochemical and spectroscopic properties in dichloromethane, benzonitrile, and pyridine. The potentials for each electrode reaction were measured by cyclic voltammetry and the electron-transfer mechanisms evaluated by analysis of the electrochemical data combined with UV-visible spectra of the neutral, electroreduced, and electroxidized forms of the corroles. The proposed electronic configurations of the initial compounds and the prevailing redox reactions involving the electroactive central c…
Design, Synthesis and Evaluation of Enzyme-Responsive Fluorogenic Probes Based on Pyridine-Flanked Diketopyrrolopyrrole Dyes
2020
The ever-growing demand for fluorogenic dyes usable in the rapid construction of analyte-responsive fluorescent probes, has recently contributed to a revival of interest in the chemistry of diketopyrrolopyrrole (DPP) pigments. In this context, we have explored the potential of symmetrical and unsymmetrical DPP derivatives bearing two or one 4-pyridyl substituents acting as optically tunable group(s). The unique fluorogenic behavior of these molecules, closely linked to N-substitution/charge state of their pyridine unit (i.e., neutral pyridine or cationic pyridinium), has been used to design DPP-based fluorescent probes for detection of hypoxia-related redox enzymes and penicillin G acylase …
Electrochemistry of Mono- and Bis-CN Ligated Cobalt Corroles
2021
International audience; The electrochemical properties of numerous transition metal corroles have been examined under a variety of<br>solution condition with special emphasis being placed on the innocent or non-innocent nature of the corrole<br>macrocycle. This property, as well as the half-wave potentials and sites of electron transfers, are known to be<br>strongly influenced by the type of central metal ion and degree of axial coordination, namely 4, 5 or 6-coordinate.<br>The redox potentials of metallocorroles are also dependent upon the solvent and inductive, resonance or steric<br>effects dictated by peripheral substituents at the meso or β-pyrrole positions of the corrole li…
Functionnalized Surface Acoustic Wave Sensors for the Detection of Hazardous Gases
2018
International audience; In this work, we show the capabilities of Surface Acoustic Wave (SAW) devices to probe the properties of gas sensitive materials for the manufacturing of hazardous gas sensors. The great capabilities of cobalt corroles for the trapping of carbon monoxide (CO) were exploited to produce selective sensors. These corroles were deposited on SAW delay lines surfaces and then exposed to carbon monoxide (CO) in standard conditions. Concentrations of a few hundreds of ppb were measured emphasizing the interest of such sensors for the detection of CO. Another type of sensitive layers exhibiting specific porosity adapted to the trapping of formaldehyde (CH$_2$O) were deposited …
Mono-DMSO ligated cobalt nitrophenylcorroles: electrochemical and spectral characterization
2018
Four mono-DMSO ligated cobalt corroles with one or three meso-nitrophenyl substituents on the macrocycle were synthesized and investigated as to their electrochemical and spectroscopic properties in CH2Cl2 and DMSO. Comparisons are made between redox reactions of the five-coordinate DMSO adducts in the current study and earlier examined five- and six-coordinate cobalt corroles with pyridine axial ligands which were characterized in a variety of nonaqueous electrochemical solvents. The binding of carbon monoxide (CO) is also investigated.
Porous Organic Polymers (POPs) based on cobalt corroles for the detection of carbon monoxide
2021
International audience; Detection of carbon monoxide (CO) at few ppm levels is a critical point for quality control of domestic and<br>industrial environment. CO is responsible for thousands of intoxications and hundreds of deaths per year in the<br>world. Moreover, CO is a residual gas found in the industrial dihydrogen used for Proton Exchange Membrane<br>fuel cell, and deactivates the fuel cell prematurely. Corroles have been largely used in sensing applications.[1]<br>Cobalt corroles display high binding affinity for carbon monoxide even in the presence of nitrogen and<br>dioxygen.[2] The affinity of the Co(III) metallocorroles for CO is directly correlated with the Lewis acid…
Influence of interfering gases on a carbon monoxide differential sensor based on SAW devices functionalized with cobalt and copper corroles
2021
International audience; <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>FR</w:LidThemeOther> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKe…
CCDC 1539258: Experimental Crystal Structure Determination
2017
Related Article: Wenqian Shan, Nicolas Desbois, Virginie Blondeau-Patissier, Mario L. Naitana, Valentin Quesneau, Yoann Rousselin, Claude P. Gros, Zhongping Ou, Karl M. Kadish|2017|Chem.-Eur.J.|23|12833|doi:10.1002/chem.201701968
CCDC 1578032: Experimental Crystal Structure Determination
2018
Related Article: Xiaoqin Jiang, Mario L. Naitana, Nicolas Desbois, Valentin Quesneau, Stéphane Brandès, Yoann Rousselin, Wenqian Shan, W. Ryan Osterloh, Virginie Blondeau-Patissier, Claude P. Gros, Karl M. Kadish|2018|Inorg.Chem.|57|1226|doi:10.1021/acs.inorgchem.7b02655
CCDC 1812155: Experimental Crystal Structure Determination
2018
Related Article: Valentin Quesneau, Wenqian Shan, Nicolas Desbois, Stephane Brandes, Yoann Rousselin, Meddy Vanotti, Virginie Blondeau-Patissier, Mario Naitana, Paul Fleurat-Lessard, Eric Van Caemelbecke, Karl M. Kadish, Claude P. Gros|2018|Eur.J.Inorg.Chem.|2018|4265|doi:10.1002/ejic.201800897
CCDC 1554869: Experimental Crystal Structure Determination
2019
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CCDC 1815709: Experimental Crystal Structure Determination
2018
Related Article: Valentin Quesneau, Wenqian Shan, Nicolas Desbois, Stephane Brandes, Yoann Rousselin, Meddy Vanotti, Virginie Blondeau-Patissier, Mario Naitana, Paul Fleurat-Lessard, Eric Van Caemelbecke, Karl M. Kadish, Claude P. Gros|2018|Eur.J.Inorg.Chem.|2018|4265|doi:10.1002/ejic.201800897