The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Corinne Lagrost - One of the best experts on this subject based on the ideXlab platform.
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Dual‐Responsive Molecular Switches Based on Dithienylethene–RuII Organometallics in Self‐Assembled Monolayers Operating at Low Voltage
Chemistry: A European Journal, 2017Co-Authors: Andrea Mulas, Xiaoyan He, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically-driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5 V vs SCE), whereas the monometallic complex show a simple one electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron transfer kinetics. Therefore, this organometallic strategy allows to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.
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Dual-Responsive Molecular Switches Based on Dithienylethene-Ru-II Organometallics in Self-Assembled Monolayers Operating at Low Voltage
Chemistry - A European Journal, 2017Co-Authors: Andrea Mulas, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5V vs. SCE), whereas the monometallic complex shows a simple one-electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron-transfer kinetics. Therefore, this organometallic strategy allows us to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.
Andrea Mulas - One of the best experts on this subject based on the ideXlab platform.
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Dual‐Responsive Molecular Switches Based on Dithienylethene–RuII Organometallics in Self‐Assembled Monolayers Operating at Low Voltage
Chemistry: A European Journal, 2017Co-Authors: Andrea Mulas, Xiaoyan He, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically-driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5 V vs SCE), whereas the monometallic complex show a simple one electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron transfer kinetics. Therefore, this organometallic strategy allows to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.
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Dual-Responsive Molecular Switches Based on Dithienylethene-Ru-II Organometallics in Self-Assembled Monolayers Operating at Low Voltage
Chemistry - A European Journal, 2017Co-Authors: Andrea Mulas, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5V vs. SCE), whereas the monometallic complex shows a simple one-electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron-transfer kinetics. Therefore, this organometallic strategy allows us to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.
Libor Červený - One of the best experts on this subject based on the ideXlab platform.
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The platinum-olefin binding energy in series of (PH_3)_2Pt(olefin) complexes - a theoretical study
Journal of Molecular Modeling, 2007Co-Authors: David Karhánek, Petr Kačer, Marek Kuzma, Jana Šplíchalová, Libor ČervenýAbstract:Theoretical investigation of Pt(0)-olefin organometallic complexes containing tertiary phosphine ligands was focused on the strength of platinum-olefin electronic interaction. DFT theoretical study of electronic effects in a substantial number of ethylene derivatives was evaluated in terms of the Pt-olefin binding energy using MP2 correlation theory. Organometallics bearing coordinated olefins with general formula (R^1R^2C = CR^3R^4)Pt(PH_3)_2 [R = various substituents] had been selected, including olefins containing both electron-donor substituents as well as electron-withdrawing groups. The stability of the corresponding complexes increases with a strengthening electron-withdrawal ability of the olefin substituents. Figure Representation of (CH_2 = CHR)Pt(PPh_3)_2 and the stability chart
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The platinum-olefin binding energy in series of (PH3)2Pt(olefin) complexes--a theoretical study.
Journal of molecular modeling, 2007Co-Authors: David Karhánek, Petr Kačer, Marek Kuzma, Jana Šplíchalová, Libor ČervenýAbstract:Theoretical investigation of Pt(0)-olefin organometallic complexes containing tertiary phosphine ligands was focused on the strength of platinum-olefin electronic interaction. DFT theoretical study of electronic effects in a substantial number of ethylene derivatives was evaluated in terms of the Pt-olefin binding energy using MP2 correlation theory. Organometallics bearing coordinated olefins with general formula (R1R2C = CR3R4)Pt(PH3)2 [R = various substituents] had been selected, including olefins containing both electron-donor substituents as well as electron-withdrawing groups. The stability of the corresponding complexes increases with a strengthening electron-withdrawal ability of the olefin substituents.
Michal Holčapek - One of the best experts on this subject based on the ideXlab platform.
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Structural analysis of organometallic compounds with soft ionization mass spectrometry.
Mass spectrometry reviews, 2010Co-Authors: Robert Jirásko, Michal HolčapekAbstract:The analysis of organometallic compounds with mass spectrometry has some special features in comparison with organic and bioorganic compounds. The first step is the choice of a suitable ionization technique, where the electrospray ionization is certainly the best possibility for most classes of organometallic compounds and metal complexes. Some ionization mechanisms of organometallic compounds are comparable to organic molecules, such as protonation/deprotonation, and adduct formation with sodium or potassium ions; however, in many cases, different mechanisms and their combinations complicate the spectra interpretation. Organometallics frequently undergo various types of adduct and polymerization reactions that result in significantly higher masses observed in the spectra in comparison to molecular weights of studied compounds. Metal elements typically have more natural isotopes than common organic elements, which cause characteristic wide distributions of isotopic peaks; for example, tin has ten natural isotopes. The isotopic pattern can be used for the identification of the type and number of metal elements in particular ions. The ionization and fragmentation behavior also depend on the type of metal atom; therefore, our discussion of mass spectra interpretation is divided according to the different type of organometallic compounds. Among various types of mass spectrometers available on the market, trap-based analyzers (linear or spherical ion-traps, Orbitrap) are suitable to study complex fragmentation pathways of organometallic ions and their adducts, whereas high-resolution and high-mass accuracy analyzers (time-of-flight-based analyzers, or Fourier transform-based analyzers-Orbitrap or ion cyclotron resonance mass spectrometers) provide accurate masses applicable for the determination of the elemental composition of individual ions.
Yves-marie Hervault - One of the best experts on this subject based on the ideXlab platform.
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Dual‐Responsive Molecular Switches Based on Dithienylethene–RuII Organometallics in Self‐Assembled Monolayers Operating at Low Voltage
Chemistry: A European Journal, 2017Co-Authors: Andrea Mulas, Xiaoyan He, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically-driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5 V vs SCE), whereas the monometallic complex show a simple one electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron transfer kinetics. Therefore, this organometallic strategy allows to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.
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Dual-Responsive Molecular Switches Based on Dithienylethene-Ru-II Organometallics in Self-Assembled Monolayers Operating at Low Voltage
Chemistry - A European Journal, 2017Co-Authors: Andrea Mulas, Yves-marie Hervault, Lucie Norel, Stéphane Rigaut, Corinne LagrostAbstract:Two carbon-rich ruthenium complexes bearing a dithienylethene (DTE) unit and a hexylthiol spacer were designed to be attached on gold surfaces. Both compounds display photochemically driven switching properties, allowing reversible conversion from open to closed forms of the DTE units upon irradiation in solution. In contrast, only the bimetallic complex undergoes an efficient electrochemical ring closure at low potential, (0.5V vs. SCE), whereas the monometallic complex shows a simple one-electron reversible redox event. These appealing switching properties could be successfully transferred within diluted self-assembled monolayers (SAMs). Furthermore, the two immobilized Organometallics exhibit fast electron-transfer kinetics. Therefore, this organometallic strategy allows us to obtain multifunctional surfaces with the possibility of combining switching events triggered by an electrochemical oxidation at low potential and by light at distinct wavelengths for a write-and-erase function, along with an access to different oxidation states. Importantly, a non-destructive electrochemical read-out is achieved at a sufficiently high scan rate that prevents any electrochemical closing. On the whole, the two surface-confined organometallic compounds exhibit appealing properties for application in molecular electronics.