Solid-state electrochemistry of metal cyanides
Publication date: Available online 17 May 2019Source: Comptes Rendus ChimieAuthor(s): Masashi Okubo, Jérôme Long, Daniel R. Talham, Rodrigue LescouëzecAbstractEfficient energy storage in the form of batteries contributes to building sustainable society. As advanced batteries need positive electrode materials capable of larger capacity, higher voltage, and lower cost, it is important to search for novel electrode materials. Among various inorganic/organic materials, cyanido-bridged coordination compounds are promising candidates for battery electrodes due to their ability to undergo solid-state redox reaction associated ...
Source: Comptes Rendus Chimie - May 19, 2019 Category: Chemistry Source Type: research
Synthesis and characterisation of a novel ferrimagnetic chain based on copper(II) and rhenium(IV)
Publication date: Available online 14 May 2019Source: Comptes Rendus ChimieAuthor(s): Carlos Rojas-Dotti, Adrián Sanchis-Perucho, Marta Orts-Arroyo, Francesc Lloret, José Martínez-LilloAbstractA novel one-dimensional copper(II)–rhenium(IV) coordination polymer of formula {[ReIVBr4(μ-ox)CuII(pyim)2]·MeCN}n (1) [ox = oxalate anion, pyim = 2-(2′-pyridyl)imidazole] has been prepared and characterised. Powder X-ray diffraction measurements on a sample of 1 support the purity of the bulk sample, whereas single-crystal X-ray diffraction shows that 1 crystallises in the orthorhombic system with space group Pbca. The cryst...
Source: Comptes Rendus Chimie - May 15, 2019 Category: Chemistry Source Type: research
Tetranuclear [FeII2FeIII2]2+ molecular switches: [FeII(bik)2(N–)2] spin-crossover complexes containing [FeIII(Tp)(CN)3]– metalloligands as N-donor
Publication date: Available online 10 May 2019Source: Comptes Rendus ChimieAuthor(s): Delphine Garnier, Abhishake Mondal, Yanling Li, Patrick Herson, Lise-Marie Chamoreau, Loic Toupet, Marylise Buron Le Cointe, E.M.B. Moos, Frank Breher, Rodrigue LescouëzecAbstractThree novel mixed valence cyanide-bridged {FeIII2FeII2} square complexes were obtained through the self-assembling of [FeIII(Tp)(CN)3]- or [FeIII(Tp*)(CN)3]− cyanido building blocks with the in situ formed [FeII(bik)2(S)2] complex (Tp = hydrotris (pyrazol-1-yl)borate, Tp* = hydrotris (3,5-dimethyl-pyrazol-1-yl)borate, bik = bis(1-methylimidazol-2-yl)ketone, S ...
Source: Comptes Rendus Chimie - May 10, 2019 Category: Chemistry Source Type: research
Marvellous molecular shapes
Publication date: Available online 7 May 2019Source: Comptes Rendus ChimieAuthor(s): Santiago AlvarezAbstractA survey of a variety of interesting molecular shapes characterized mostly in the last two decades is presented. The selection of molecules shown is made based on their attractive three-dimensional structures (so often concealed by their usual two-dimensional structural formulae), the unusual coordination geometries of metal atoms, the subjective appreciation of how beautiful, funny or interesting a molecular shape is, or the sticky nature of arene rings at terphenyl groups and their effects on the molecular shapes ...
Source: Comptes Rendus Chimie - May 8, 2019 Category: Chemistry Source Type: research
Editorial Board - English
Publication date: April 2019Source: Comptes Rendus Chimie, Volume 22, Issue 4Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Editorial Board - French
Publication date: April 2019Source: Comptes Rendus Chimie, Volume 22, Issue 4Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Sommaire / Contents
Publication date: April 2019Source: Comptes Rendus Chimie, Volume 22, Issue 4Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Effect of the alkyl chain length on micelle formation for bis(N-alkyl-N,N-dimethylethylammonium)ether dibromides
In this study, we investigated the relationship between the alkyl chain length and critical micelle concentration for gemini surfactants containing an oxygen atom in the spacer, that is, bis(N-alkyl-N,N-dimethylethylammonium)ether dibromides, for potential use as corrosion inhibitors.Graphical abstract (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Dialkyl-substituted monoamidinium-templated oxalate-based noncentrosymmetric 2D compounds
Publication date: Available online 6 May 2019Source: Comptes Rendus ChimieAuthor(s): Catalin Maxim, Sylvie Ferlay, Cyrille TrainAbstract1-Propyl-2-phenyl-3-methylamidinium (A) and 1-hexyl-2-phenyl-3-methylamidinium (B) cations are used to template the formation of two-dimensional (2D) oxalate-based bimetallic compounds of formula A[MnIICrIII(C2O4)3] (1) and B[MnIICrIII(C2O4)3] (2). The single-crystal X-rays diffraction analysis revealed that both compounds crystallize in noncentrosymmetric space groups. In both compounds, the bimetallic coordination network is made of slightly corrugated 2D (6,3) bimetallic honeycomb layer...
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V)
Publication date: Available online 7 May 2019Source: Comptes Rendus ChimieAuthor(s): Masahiro Mikuriya, Daisuke Yoshioka, Dominique Luneau, Shun Kawauchi, Dariusz Matoga, Janusz Szklarzewicz, Makoto HandaAbstractA tetra (n-butyl)ammonium (n-Bu4N+) salt of Ru2–W complex consisting of dinuclear ruthenium (II,III) pivalate, ([RuIIRuIII(piv)4]+) (Hpiv = pivalic acid), and octacyanidotungstate(V), [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] (1), was synthesized and characterized by elemental analysis, infrared spectra, and temperature dependence of magnetic susceptibilities (2–300 K). The crystal structure of 1 revealed a z...
Source: Comptes Rendus Chimie - May 7, 2019 Category: Chemistry Source Type: research
Decomplexing madder lakes using oxalic acid: A novel method coupled with microwave or ultrasound processes
Publication date: Available online 27 April 2019Source: Comptes Rendus ChimieAuthor(s): Jean-Baptiste Mazzitelli, Carole Mathe, Cathy VieillescazesAbstractThe aim of the present study was to establish a mild extraction and universal method to characterize madder lakes of Rubia tinctorum by liquid chromatography coupled with a photodiode array detector . To analyze the lakes, anthraquinone molecules must be decomplexed of metal links. To this end, two processes, one ultrasound and the other microwave, were improved in association with two solutions, an oxalic acid solution (0.5 M in MeOH/H2O 50/50) and an acetic acid buffer...
Source: Comptes Rendus Chimie - April 28, 2019 Category: Chemistry Source Type: research
Effect of the alkyl chain of quaternary ammonium cationic surfactants on corrosion inhibition in hydrochloric acid solution
In this study, the effect of the alkyl chain of quaternary ammonium cationic surfactants on corrosion inhibition in hydrochloric acid (HCl) solution was investigated by using dodecyl trimethyl ammonium chloride (DTAC), tetradecyl trimethyl ammonium chloride (TTAC), cetyl trimethyl ammonium chloride (CTAC), and octadecyl trimethyl ammonium chloride (OTAC) as corrosion inhibitors to uncover their structure–efficiency relationships. The effect of the alkyl chain of quaternary ammonium cationic surfactants on corrosion inhibition in HCl solution was studied under different conditions, such as corrosion inhibitor concentratio...
Source: Comptes Rendus Chimie - April 22, 2019 Category: Chemistry Source Type: research
Effects of solvent vapor annealing on the crystallinity and spin crossover properties of thin films of [Fe(HB(tz)3)2]
This study revealed the critical importance of the relative humidity (RH): for values above a threshold of ca. 72% RH (at 298 K) a very fast (seconds) crystallization occurs leading to robust, crystalline films, whereas crystallization at lower RH values is slower (hours) and leads to less stable, semicrystalline films displaying incomplete spin transitions.RésuméNous avons étudié le recuit en présence de vapeurs de solvant d'un film mince obtenu par évaporation thermique du complexe à transition de spin [FeII(HB(tz)3)2] (tz = 1,2,4-triazol-1-yl). L'utilisation de la diffraction des rayons X à angle rasant, de la ...
Source: Comptes Rendus Chimie - April 20, 2019 Category: Chemistry Source Type: research
Application of laccase/DDQ as a new bioinspired catalyst system for the aerobic oxidation of tetrahydroquinazolines and Hantzsch 1,4-dihydropyridines
Publication date: Available online 17 April 2019Source: Comptes Rendus ChimieAuthor(s): Mastaneh Shariati, Gholamhassan Imanzadeh, Amin Rostami, Nadya Ghoreishy, Somayyeh KheirjouAbstractLaccase/DDQ as a new bioinspired quinone-based cooperative catalytic system was used for the biomimetic aerobic oxidative synthesis of 2-substituted quinazolines and Hantzsch pyridines from the oxidative cyclocondensation of 2-aminobenzylamine and aldehydes and the oxidative aromatization of 1,4-dihydropyridines, respectively. The products were obtained in good to high yields in a phosphate buffer (0.1 M, 12.5 mL, pH 4.5) and acetonitril...
Source: Comptes Rendus Chimie - April 19, 2019 Category: Chemistry Source Type: research
Access to NH-aziridine-2-carboxamides through Davidsen acylimidodicarbonate activation
Publication date: Available online 11 April 2019Source: Comptes Rendus ChimieAuthor(s): Jekaterīna Ivanova, Boriss Štrumfs, Raivis ŽalubovskisAbstractAcylimidodicarbonates obtained from aziridine-2-carboxamides through Davidsen bis-Boc activation react with amine nucleophiles under mild conditions to form tertiary aziridine-2-carboxylic acid amides. NH aziridine-2-carboxylic acid amides were obtained by hydrogenolythic deprotection of N-Cbz derivatives. (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - April 13, 2019 Category: Chemistry Source Type: research
