Optical methods for the detection of heavy metal ions

International audienc

Development of complex technologies for biomass processing

Paper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.ej201

Hybrid Materials Based on Imidazo[4,5-<i>b</i>]porphyrins for Catalytic Oxidation of Sulfides

Heterogenized metalloporphyrin catalysts for oxidation reactions are extensively explored to improve chemical production. In this work, manganese meso-tetraarylporphyrins were immobilized on hydrated mesoporous titanium dioxide (SBET = 705 m2 g−1) through carboxylate or phosphonate anchoring groups separated from the macrocycle by the 2-arylimidazole linker fused across one of the pyrrolic rings of the macrocycle. The element composition of two mesoporous hybrid materials thus obtained were investigated and the integrity of the immobilized complexes was shown by different physicochemical methods. Finally, the catalytic efficiency of the more stable material Mn(TMPIP)/TiO2 with the phosphonate anchor was evaluated in the selective oxidation of sulfides to sulfoxides by molecular oxygen in the presence of isobutyraldehyde (IBA). The heterogenized complex has shown excellent catalytic activity exhibiting a turnover (TON) of ~1100 in a single catalytic run of the sulfoxidation of thioanisole. The catalyst was successfully reused in seven consecutive catalytic cycles

Synthesis of Mono-, Di-, and Trisilyl-Substituted Alkenes via the Hydrosilylation of Methylenecyclopropanes Catalyzed by Rh(I) Complexes

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Structural and Electrochemical Studies of Copper(I) Complexes with Diethoxyphosphoryl-1,10-phenanthrolines

International audienc

Facile Synthesis and Self-Assembly of Zinc (2-Diethoxyphosphorylethynyl)porphyrins

Invited for the cover of this issue are Alla Lemeune, Alexander Yu. Mitrofanov, Irina P. Beletskaya and co-workers from the International Associated Laboratory of Macrocyclic Systems and Related Materials (LIA LAMREM) of CNRS and RAS supported by RFBR and included the ICMUB, Université Bourgogne Franche-Comté (Dijon, France), Frumkin Institute of Physical Chemistry and Electrochemistry, Peoples’ Friendship University and Lomonosov Moscow State University (Moscow, Russia). The cover image shows the biomimetic self-organization of (phosphorylethynyl)porphyrins. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei

Supramolecular Assembly of Planar Systems from Modular Molecules with a Given Hydrophilic–Lipophilic Balance: Film Sensors with an Anthraquinone Signal Group

International audienceThis work presents an original approach to obtaining highly sensitive ultrathin film sensors that allows molecular design of surface-active modular molecules by completing a signal anthraquinone block with hydrophobic radicals and polar receptor groups, with their number and size provided in accordance with the sensor type. An important advantage of the suggested approach is that it not only allows the functioning of sensors in the aqueous medium, but also their manufacturing (supramolecular assembly). The key regularity of ligands of the suggested series is selectivity with respect to mercury and copper cations. Application of amphipilic ligands in film liquid (Langmuir monolayers) and solid-state (Langmuir-Blodgett films) sensors allowed developing optical sensors for mercury and copper cations with the detection limit, as dependent on the sensor type, varying from several to hundredths of ppm

Copper( ii ) complexes with phosphorylated 1,10-phenanthrolines: from molecules to infinite supramolecular arrays

International audienceThe reaction of phosphorylated 1,10-phenanthrolines 3-Pphen, 3,8-Pphen and 4,7-Pphen (3-Pphen = 3-diethoxyphosphorylphenanthroline, 3,8-Pphen = 3,8-bis(diethoxyphosphoryl) phenanthroline, 4,7-Pphen = 4,7-bis(diethoxyphosphoryl) phenanthroline) and hydrated copper(II) nitrate in a 1 : 1 ratio leads to the formation of supramolecular architectures. In the 1D coordination polymer [Cu(3-Pphen)(NO3)(2)](n) (2) the copper atom is coordinated to only one phenanthroline ligand and the coordination sphere is completed by two oxygen atoms of nitrate anions and the oxygen atom of the phosphoryl group from the neighbouring phenanthroline ligand. Complex Cu(3,8-Pphen)(NO3)(2) (3) crystallizes from dichloromethane/ether in two polymorphic forms. Form 3-I is a dimeric complex in which two phenanthroline rings are parallel and offset-shifted due to the formation of two (P) O-Cu bonds. The crystals of the polymorph 3-II are composed of polymeric chains in which the coordination sphere of the metal centres and the arrangement of the mononuclear fragments are similar to those of complex 2. Complex [Cu(4,7-Pphen)(NO3)(2)](2) (4) crystallizes from toluene/acetonitrile and exhibits a dimeric structure which is similar to that of 3-I