Abdou K. Diallo, Jean‐Claude Daran, F. Varret, Jaimé Ruiz, Didier Astruc,
A new family of hexakis(ferrocenylethynyl)benzenes was synthesized by Negishi coupling from ethynylferrocenes and C(6)Br(6) and can be reversibly oxidized to stable hexaferrocenium salts (see picture, Ar(F)=[3,5-C(6)H(3)(CF(3))(2)]). Their cyclic voltammograms show a single six-electron wave, three distinct two-electron waves, or a cascade of six single-electron waves, depending on the electrolyte counterion and number of methyl substituents on the ferrocenyl groups.
Tópico(s): Organoboron and organosilicon chemistry
2009 - Wiley | Angewandte Chemie International Edition
Ludovic Rapp, Abdou Karim Diallo, Anne‐Patricia Alloncle, Christine Videlot‐Ackermann, Fréderic Fagès, Philippe Delaporte,
Organic thin-film transistors have been fabricated using laser-induced forward transfer as spatially resolved laser-printing method. Using this technique, source and drain electrodes were deposited from silver nanoparticle ink and the copper phthalocyanine (CuPc) was used to form the active layer. Both kinds of materials were transferred from a donor substrate onto a receiver substrate upon irradiation with laser pulses in the picosecond regime. The latter substrate formed the gate and the dielectric ...
Tópico(s): Thin-Film Transistor Technologies
2009 - American Institute of Physics | Applied Physics Letters
Abdou Karim Diallo, J. Tardy, Z. Q. Zhang, François Bessueille, Nicole Jaffrézic‐Renault, M. Lemiti,
This paper reports on an enzymatic organic field effect transistor based biosensor dedicated to the detection of trimethylamine, in view of fish freshness assessment. Flexible devices were processed on Kapton substrate with pentacene as organic semiconductor and Parylene-C as top gate dielectric. Proton sensitive dielectric surface was achieved by depositing a thin hydrogenated silicon nitride layer at moderate temperature on Parylene. An enzymatic membrane made of flavin-containing mono-oxygenase ...
Tópico(s): Conducting polymers and applications
2009 - American Institute of Physics | Applied Physics Letters
Abdou K. Diallo, Jaimé Ruiz, Didier Astruc,
A new, very simple, and general method for the synthesis of functional and heterodifunctional 1,1′-ferrocenes is reported using the visible-light photolysis of a simple 100-W desk lamp with the easily available complexes [(η5-C5H4R)Fe(η6-toluene)][PF6] (R = Me, Cl, COMe, CO2H, CO2Me, CO2CH2CCH, CONHCH2Ph) and a substituted cyclopentadienyl salt MC5H4R′ (M = Li, Na, R′ = H, COMe, CO2Me, SiMe2CH2Cl, PPh2) under ambient conditions. All the reactions give high yields except when the side chain contains a strong ...
Tópico(s): Molecular Junctions and Nanostructures
2009 - American Chemical Society | Organic Letters
Cátia Ornelas, Abdou K. Diallo, Jaimé Ruiz, Didier Astruc,
Abstract Complexation of palladium(II) acetate [Pd(OAc) 2 ] or dipotassium tetrachloropalladate [K 2 PdCl 4 ] to “click” polymers functionalized with phenyl, ferrocenyl and sodium sulfonate groups gave polymeric palladium(II)‐triazolyl complexes that were reduced to “click” polymer‐stabilized palladium nanoparticles (PdNPs). Transmission electron microscopy (TEM) showed that reduction using sodium borohydride (NaBH 4 ) produced PdNPs in the 1–3 nm range of diameters depending on the nature of the functional ...
Tópico(s): Dendrimers and Hyperbranched Polymers
2009 - Wiley | Advanced Synthesis & Catalysis
Abdou K. Diallo, Jean‐Claude Daran, F. Varret, Jaimé Ruiz, Didier Astruc,
Abstract Durch die Negishi‐Kupplung von Ethinylferrocenen mit C 6 Br 6 wurde eine neue Familie von Hexakis(ferrocenylethinyl)benzolen synthetisiert, die reversibel zu stabilen Hexaferrocenium‐Salzen oxidiert werden können (siehe Bild, Ar F =[3,5‐C 6 H 3 (CF 3 ) 2 ]). Je nach Gegenion und Zahl der Methylsubstituenten an den Ferrocenylgruppen zeigen die Cyclovoltammogramme eine einzelne Sechselektronenwelle, drei Zweielektronenwellen oder eine Kaskade von sechs Einelektronenwellen. magnified image
Tópico(s): Molecular Sensors and Ion Detection
2009 - Wiley | Angewandte Chemie
Élodie Boisselier, Abdou K. Diallo, Lionel Salmon, Jaimé Ruiz, Didier Astruc,
Gold nanoparticles (AuNPs) are synthesized and stabilized by new "clicked" dendrimers of generations zero to two (G0–G2) containing tri- and tetra-ethyleneglycol tethers; they are either encapsulated by G1 (81 tethers) and G2 (243 tethers) or stabilized without encapsulation by G0 (27 tethers).
Tópico(s): RNA Interference and Gene Delivery
2008 - Royal Society of Chemistry | Chemical Communications
Nicolas Candelon, Dominique Lastécouères, Abdou K. Diallo, Jaime Ruiz Aranzaes, Didier Astruc, Jean‐Marc Vincent,
The copper(I) complex [Cu(C18(6)tren)]Br 1 (C18(6)tren = tris(2-dioctadecylaminoethyl)amine) which exhibits a good stability towards aerobic conditions is a versatile, highly reactive and recyclable catalyst for the Huisgen cycloaddition of azides with terminal or internal alkynes and is a useful catalyst for the preparation of "click" dendrimers.
Tópico(s): Photochromic and Fluorescence Chemistry
2008 - Royal Society of Chemistry | Chemical Communications
Abdou K. Diallo, Élodie Boisselier, Liyuan Liang, Jaimé Ruiz, Didier Astruc,
A dendritic nanoreactor (see graphic) constructed by 1→3 connectivity and terminated by 27 tetraethyleneglycol tethers induces ring-closing metathesis (RCM), cross metathesis (CM) and enyne metathesis (EYM) using low amounts of Grubbs-II catalyst in water and air, down to 0.04 % Grubbs catalyst for RCM. The dendrimer can be re-used at least 10 times without significant yield decrease. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, ...
Tópico(s): Fuel Cells and Related Materials
2010 - Wiley | Chemistry - A European Journal
Élodie Boisselier, Abdou K. Diallo, Lionel Salmon, Cátia Ornelas, Jaimé Ruiz, Didier Astruc,
Water-soluble arene-cored "clicked" and non-"clicked" dendrimers terminated by 27, 81, and 243 triethyleneglycol (TEG) tethers (respectively generations G0, G1, and G2) have been synthesized and shown to form dendrimer-encapsulated gold nanoparticles (DEAuNPs) and dendrimer-stabilized gold nanoparticles (DSAuNPs). The dendrimers have been characterized by IR, 1H NMR, 13C NMR, size-exclusion chromatography, elemental analysis, MALDI-TOF mass spectroscopy, DOSY NMR, and dynamic light scattering. The AuNPs ...
Tópico(s): Advanced Polymer Synthesis and Characterization
2010 - American Chemical Society | Journal of the American Chemical Society
Lauréline Bonniard, Samia Kahlal, Abdou K. Diallo, Cátia Ornelas, Thierry Roisnel, Gabriele Manca, João Rodrigues, Jaimé Ruiz, Didier Astruc, Jean‐Yves Saillard,
Density functional theory (DFT) calculations on the model [{FeCp(dpe)}2{1,4-C6H4(CN)2}]2+ (32+; dpe = diphosphinoethane) of salts of the cations [{FeCp(dppe)}2{1,4-C6H4(CN)2}]2+ (12+; dppe = 1,2-bis[diphenyldiphosphino]ethane) and [{FeCp*(CO)2}2{1,4-C6H4(CN)2}]2+ (22+), for which the X-ray crystal structures have been determined, as well as on its isomer [{FeCp(dpe)}2{1,3-C6H4(CN)2}]2+ (42+) and on the related complex [{FeCp(dpe)}3{1,3,5-C6H3(CN)3}]3+ (52+), indicate that the highest occupied molecular orbitals (HOMOs) ...
Tópico(s): Metal complexes synthesis and properties
2010 - American Chemical Society | Inorganic Chemistry
Abdou K. Diallo, Jaimé Ruiz, Didier Astruc,
Visible-light photolysis using a simple 100 W lamp of the readily available precursors [(η5-C5H4R)Fe(η6-toluene)][PF6] (R = H, Me, Cl, COMe, CO2H, CO2Me, CO2CH2CCH, CONHCH2Ph, NHCH2Ph), or the bimetallic precursor [(μ2,η5,η′5-Fv)Fe2(η6-toluene)2][PF6]2 (Fv = fulvalene) in the presence of a substituted cyclopentadienyl salt C5H4R′M (R′ = COCH3, CO2CH3, PPh2, SiMe2CH2Cl; M = Li or Na) or the dicyclopentadienyl salt 1,4-C6H4(CH2C5H4)2Na2 in dichloromethane, acetonitrile, or tetrahydrofuran under ambient conditions ...
Tópico(s): Molecular Junctions and Nanostructures
2010 - American Chemical Society | Inorganic Chemistry
Didier Astruc, Cátia Ornelas, Abdou K. Diallo, Jaimé Ruiz,
This article is an account of the work carried out in the authors’ laboratory illustrating the usefulness of dendrimer design for nanoparticle palladium catalysis. The “click” synthesis of dendrimers constructed generation by generation by 1à3 C connectivity, introduces 1,2,3-triazolyl ligands insides the dendrimers at each generation. Complexation of the ligands by PdII followed by reduction to Pd0 forms dendrimer-stabilized Pd nanoparticles (PdNPs) that are extremely reactive in the catalysis of ...
Tópico(s): Chemical Synthesis and Analysis
2010 - Multidisciplinary Digital Publishing Institute | Molecules
Abdou K. Diallo, Christelle Absalon, Jaimé Ruiz, Didier Astruc,
A family of rigid ferrocenyl-terminated redox stars has been synthesized--by Negishi coupling, including hexa(ferrocenethynyl)benzene complexes, a dodecaferrocenyl star, and stars with extended rigid tethers--and fully characterized. Cyclic voltammetry (CV) studies of the parent complex hexa(ferrocenylethynyl)benzene, 1, show a single wave for the six-electron oxidation of 1 using Nn-Bu(4)PF(6) as the supporting electrolyte on a Pt anode in CH(2)Cl(2), whereas three distinct two-electron reversible ...
Tópico(s): Magnetism in coordination complexes
2010 - American Chemical Society | Journal of the American Chemical Society
Abdou Karim Diallo, Christine Videlot‐Ackermann, Philippe Marsal, Hugues Brisset, Fréderic Fagès, Atsufumi Kumagai, Noriyuki Yoshimoto, Françoise Serein‐Spirau, Jean‐Pierre Lère‐Porte,
Two thiophene-phenylene semiconductors, bis(2-phenylethynyl) end-substituted oligothiophenes (diPhAc-nTs, n = 2, 3), were synthesized and studied with respect to their optical, electrochemical, structural and electrical properties. The optical and electrochemical properties of the oligomers in solution were investigated by UV-vis absorption and photoluminescence spectroscopies, and cyclic voltammetry. High vacuum evaporated thin films were investigated by optical absorption, X-ray diffraction and AFM, ...
Tópico(s): Conducting polymers and applications
2010 - Royal Society of Chemistry | Physical Chemistry Chemical Physics
Abdou K. Diallo, Stéphane Menuel, Éric Monflier, Jaimé Ruiz, Didier Astruc,
CuI-catalyzed Huisgen-type dipolar 'click' reactions between azidomethyl-β-cyclodextrin and ethynylferrocene, ethylnylcobaltocenium hexafluorophosphate, and bis(ethynyl)-biferrocene yield the corresponding metallocenyl-1,2,3-triazolyl-β-cyclodextrins. The monometallocenyl 1,2,3-triazolyl-β-cyclodextrins are soluble in water, unlike the biferrocene derivative.
Tópico(s): Advanced biosensing and bioanalysis techniques
2010 - Elsevier BV | Tetrahedron Letters
Abdou K. Diallo, Cátia Ornelas, Lionel Salmon, Jaime Ruiz Aranzaes, Didier Astruc,
Drei Generationen (G0, G1, G2) von dendrimerstabilisierten Pd-Nanopartikeln (PdNPs) wurden durch Klickchemie synthetisiert. Sie katalysieren Suzuki-Reaktionen von PhX (X=I oder Br) bei 25 °C, wobei die katalytische Aktivität mit sinkender Konzentration steigt. Der G0-Katalysator liefert eine Umsatzzahl von 540 000 bei 1 ppm an Pd-Atomen, und die Extraktion der PdNPs mit Alkanthiolen führt zu robusten Suzuki-Katalysatoren, die ausschließlich PhI umsetzen (siehe Schema). Supporting information for this ...
Tópico(s): Click Chemistry and Applications
2007 - Wiley | Angewandte Chemie
Abdou K. Diallo, Cátia Ornelas, Lionel Salmon, Jaime Ruiz Aranzaes, Didier Astruc,
What generation gap? Three generations (G0, G1, G2) of dendrimer-stabilized Pd nanoparticles (PdNPs) synthesized by click chemistry catalyze Suzuki reactions of PhX (X=I or Br) at 25 °C with increasing catalytic activity as their concentration is decreased: A turnover number of 540 000 was observed for the G0 catalyst at 1 ppm in Pd atoms. Extraction of the PdNPs with alkanethiols yields robust Suzuki catalysts for PhI only (see scheme). Supporting information for this article is available on the WWW ...
Tópico(s): Chemical Synthesis and Analysis
2007 - Wiley | Angewandte Chemie International Edition
Ludovic Rapp, Abdou Karim Diallo, Sébastien Nénon, Anne‐Patricia Alloncle, Christine Videlot‐Ackermann, Fréderic Fagès, Matthias Nagel, Thomas Lippert, Philippe Delaporte,
Organic thin-film transistor (OTFT) devices were achieved using the laser-induced forward transfer technique. As p-type organic semiconductor, distyryl-quaterthiophene (DS4T) was vacuum-deposited on a donor substrate and transferred with picosecond laser pulses on Si/SiO2-based receiver substrates to form an organic active layer. To avoid laser damage of the organic thin film, a UV-sensitive aryltriazene polymer as a sacrificial layer was used. The polymer layer, deposited on the donor substrate prior ...
Tópico(s): Nonlinear Optical Materials Studies
2011 - Elsevier BV | Thin Solid Films
Didier Astruc, Abdou K. Diallo, Sylvain Gatard, Liyuan Liang, Cátia Ornelas, Victor Martinez, Domingo Mery, Jaimé Ruiz,
The interplay between olefin metathesis and dendrimers and other nano systems is addressed in this mini review mostly based on the authors' own contributions over the last decade. Two subjects are presented and discussed: (i) The catalysis of olefin metathesis by dendritic nano-catalysts via either covalent attachment (ROMP) or, more usefully, dendrimer encapsulation - ring closing metathesis (RCM), cross metathesis (CM), enyne metathesis reactions (EYM) - for reactions in water without a co-solvent and ( ...
Tópico(s): Chemical Synthesis and Analysis
2011 - Beilstein Institute for the Advancement of Chemical Sciences | Beilstein Journal of Organic Chemistry
Liyuan Liang, Abdou K. Diallo, Lionel Salmon, Jaimé Ruiz, Didier Astruc,
Abstract Mono‐, bis‐, and tris(4‐ferrocenyl‐1,2,3‐triazolylmethyl)arene–β‐cyclodextrin adducts have been used to prepare new Pd 0 nanoparticle (PdNP) catalysts for C–C cross‐coupling reactions in EtOH/H 2 O. The results show that these catalysts work well in Miyaura–Suzuki and Heck reactions with iodoarenes at 25 and 80 °C, respectively, with turnover numbers (TONs) of up to 31000 for standard Miyaura–Suzuki reactions of PhI when 10 ppm of the Pd catalyst (5 nm PdNPs) were used. The results show the ...
Tópico(s): Click Chemistry and Applications
2012 - Wiley | European Journal of Inorganic Chemistry
Hecham Aboubakr, M. G. Tamba, Abdou Karim Diallo, Christine Videlot‐Ackermann, L. Bélec, Olivier Siri, Jean‐Manuel Raimundo, Georg H. Mehl, Hugues Brisset,
We report the synthesis of a new diketone bridged dithiophene end-capped with the mesogenic functionalities: 2,7′-bis(alkoxy-biphenyl) and 2,7′-bis(alkoxy-phenyl)-benzo[2,1-b:3,4-b′]dithiophene-4,5-dione. Optical and electrochemical properties in solution were investigated by UV-visible absorption and cyclic voltammetry. Liquid crystal properties of these new materials were investigated by differential scanning calorimetry, optical polarizing microscopy, and X-ray diffraction studies. Both compounds ...
Tópico(s): Conducting polymers and applications
2012 - Royal Society of Chemistry | Journal of Materials Chemistry
Didier Astruc, Amalia Rapakousiou, Yanlan Wang, Rodrigue Djeda, Abdou K. Diallo, Jaimé Ruiz, Cátia Ornelas,
Various types of mixed-valent metallodendrimers and star-shaped macromolecules containing ferrocenyl, biferrocenyl, or other redox-robust iron groups with rigid or flexible tethers of short and long lengths mostly studied in the authors' laboratory including the class type in terms of Robin-Day classification and their functions including electrode modification, sensing, and nanoparticle templates are discussed in this mini review.
Tópico(s): Conducting polymers and applications
2014 - Taylor & Francis | Journal of Coordination Chemistry
Abdou K. Diallo, Liana Annunziata, Stéphane Fouquay, Guillaume Michaud, Frédéric Simon, Jean‐Michel Brusson, Sophie M. Guillaume, Jean‐François Carpentier,
The synthesis of a variety of mono- and di-(glycerol carbonate) telechelic polyolefins has been achieved upon ruthenium-catalyzed ring-opening metathesis polymerization (ROMP) of cyclooctene (COE) derivatives in the presence of a vinyl or acryloyl derivative of glycerol carbonate (GC) acting as a chain-transfer agent (CTA). Reaction monitoring based on SEC and 1H NMR analyses suggested that the ROMP proceeds through the formation of first the α-GC,ω-vinyl-poly(cyclooctene) (PCOE) intermediate, which ...
Tópico(s): Chemical Synthesis and Analysis
2014 - Royal Society of Chemistry | Polymer Chemistry
Giuseppe Mattioli, Sadok Ben Dkhil, Maria Ilenia Saba, Giuliano Malloci, Claudio Melis, Paola Alippi, F. Filippone, Paolo Giannozzi, Anil Thakur, Mériem Gaceur, Olivier Margeat, Abdou Karim Diallo, Christine Videlot‐Ackermann, Jörg Ackermann, A. Amore Bonapasta, Alessandro Mattoni,
Atomistic simulations and experimental investigations are combined to study heterojunction interfaces of hybrid polymer solar cells, with the aim to better understand and precisely predict their photovoltaic properties. The focus is on a hybrid ternary model system based on a poly(3‐hexylthiophene) (P3HT)/zinc phthalocyanine (ZnPc)/ZnO interface, in which a ZnPc interlayer is applied to improve the performance of the hybrid interface. Theoretical predictions of the ternary system are validated against ...
Tópico(s): Conducting polymers and applications
2014 - Wiley | Advanced Energy Materials
Cătălin Constantinescu, Abdou Karim Diallo, Ludovic Rapp, Pierre Crémillieu, R. Mazurczyk, Françoise Serein‐Spirau, J.-P. Lère-Porte, P. Delaporte, Anne‐Patricia Alloncle, Christine Videlot‐Ackermann,
We report on the one-step laser printing of multi-layered organic-based field effect transistors, using thin films of bis(2-phenylethynyl) end-substituted terthiophene (diPhAc-3 T) as semiconductor, parylene-C (Py-C) as dielectric and silver (Ag) as gate electrode, respectively. The laser-induced forward transfer (LIFT) process was used to transfer pixels from donor to receiver substrates. The latter included pre-designed source and drain gold electrodes to form complete organic thin films transistors ( ...
Tópico(s): Analytical Chemistry and Sensors
2014 - Elsevier BV | Applied Surface Science
William Guérin, Abdou K. Diallo, Evgueni Kirilov, Marion Hélou, Martine Slawinski, Jean‐Michel Brusson, Jean‐François Carpentier, Sophie M. Guillaume,
The ring-opening polymerization (ROP) of racemic trans-cyclohexene carbonate (rac-CHC) and enantiopure trans-(R,R)-CHC is successfully carried out with various catalyst systems. Poly(cyclohexene carbonate) (PCHC) with a slight isotactic bias (Pm = ca. 60–76%) is obtained by ROP of rac-CHC catalyzed by zinc diaminophenolate, zinc β-diketiminate, yttrium bis(phenolate), or 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) in combination with an alcohol as a co-initiator. Purely isotactic PCHC is synthesized for ...
Tópico(s): biodegradable polymer synthesis and properties
2014 - American Chemical Society | Macromolecules
Liana Annunziata, Abdou K. Diallo, Stéphane Fouquay, Guillaume Michaud, Frédéric Simon, Jean‐Michel Brusson, Jean‐François Carpentier, Sophie M. Guillaume,
α,ω-Di(glycerol carbonate) telechelic poly(propylene glycol) (PPG), poly(ethylene glycol) (PEG), poly(ester ether) (PEE), and poly(butadiene) (PBD) have been synthesized through chemical modification of the corresponding α,ω-dihydroxy telechelic polymers (PPG-OH2, PEG-OH2, PEE-OH2 and PBD-OH2, respectively). Tosylation of the polymer diols with 4-tosylmethyl-1,3-dioxolan-2-one (GC-OTs) afforded, in high yields, the desired PPG, PEG, PEE and PBD end-capped at both termini with a five-membered ring cyclic ...
Tópico(s): Catalysis for Biomass Conversion
2013 - Royal Society of Chemistry | Green Chemistry
Abdou K. Diallo, Jaimé Ruiz, Didier Astruc,
Abstract The coupling reactions of ethynylferrocene with trihalogenoarenes do not lead to ethynylferrocenyl arenes that are soluble enough to form the basis of a suitable construction of stiff ferrocenylethynyl arene‐cored dendrimers, which explains the previous lack of reports on stiff ferrocenyl dendrimers. However, rigid ferrocenyl‐terminated dendrimers have been synthesized from 1,3,5‐tribromo‐ and triiodobenzene through Sonogashira and Negishi reactions with 1,2,3,4,5‐pentamethyl‐1′‐ethylnylferrocene ( ...
Tópico(s): Molecular Junctions and Nanostructures
2013 - Wiley | Chemistry - A European Journal
Abdou Karim Diallo, Mériem Gaceur, Nicolas Berton, Olivier Margeat, Jörg Ackermann, Christine Videlot‐Ackermann,
Tópico(s): Organic Electronics and Photovoltaics
2013 - Elsevier BV | Superlattices and Microstructures