Author: Tamás Fodor

Inside Cover: Hydrogen-Bonded Open-Framework with Pyridyl-Decorated Channels: Straightforward Preparation and Insight into Its Affinity for Acidic Mo…

2017

International audience; A hydrogen-bonded open framework with pores decorated by pyridyl groups was constructed by off-charge-stoichiometry assembly of protonated tetrakis(4-pyridyloxymethyl)methane and [Al(oxalate)(3)](3-), which are the H-bond donor and acceptor of ionic H-bond interactions, respectively. This supramolecular porous architecture (SPA-2) has 1nm-large pores interconnected in 3D with large solvent-accessible void (53%). It demonstrated remarkable affinity for acidic organic molecules in solution, which was investigated by means of various carboxylic acids including larger drug molecules. Competing sorption between acetic acid and its halogenated homologues evidenced good sel…

porosityabsolute-structureHydrogenSupramolecular chemistrychemistry.chemical_element010402 general chemistry01 natural sciences[ CHIM ] Chemical SciencesCatalysissupramolecular chemistrycrystalhost-guest systemsPolymer chemistryMoleculesolid-state nmr[CHIM]Chemical Scienceshost frameworkssorption010405 organic chemistryHydrogen bondmicroporous materialsOrganic ChemistryarchitecturesSorptionGeneral Chemistrymetal-organic frameworkenantioselective separationOpen frameworkcations0104 chemical scienceschemistryadsorptionhydrogen bondsCover (algebra)

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Effects of preorganization in the chelation of UO22+ by hydroxamate ligands: cyclic PIPO– vs linear NMA–

2018

International audience; Many siderophores incorporate as bidentate chelating subunits linear and more seldomly cyclic hydroxamate groups. In this work, a comparative study of the uranyl binding properties in aqueous solution of two monohydroxamic acids, the prototypical linear N-methylacetohydroxamic acid (NMAH) and the cyclic analog 1-hydroxypiperidine-2-one (PIPOH), has been carried out. The complex [UO2(PIPO)(2)(H2O)] crystallized from slightly acidic water solutions (pH < 5), and its molecular structure was determined by X-ray diffraction. The uranyl speciation in the presence of both ligands has been thoroughly investigated in a 0.1 M KNO3 medium at 298.2 K by the combined use of four …

DenticitySpeciation010402 general chemistry010403 inorganic & nuclear chemistry01 natural sciencesCatalysisMetalchemistry.chemical_compounduranylMaterials Chemistry[CHIM.CRIS]Chemical Sciences/CristallographyMoleculeChelation[CHIM.COOR]Chemical Sciences/Coordination chemistry[PHYS]Physics [physics]Aqueous solutionLigandChemistryN-methylacetohydroxamic acidGeneral ChemistryUranyl0104 chemical sciencesCrystallographyStability constants of complexesvisual_artSolution thermodynamicscyclic hydroxamic acidvisual_art.visual_art_medium[CHIM.RADIO]Chemical Sciences/Radiochemistry

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Hydrogen-Bonded Open-Framework with Pyridyl-Decorated Channels: Straightforward Preparation and Insight into Its Affinity for Acidic Molecules in Sol…

2017

International audience; An hydrogen-bonded open framework with pores decorated by pyridyl groups has been constructed following an off-charge-stoichiometry assemblage of protonated tetrakis(4-pyridyl-oxymethyl)methane and [Al(oxalate)3]3-, respectively the H-bond donor and acceptor of the ionic H-bond interactions. This supramolecular porous architecture (SPA-2) possesses 1 nm-large pores interconnected in 3D with high solvent accessible void (53%). It demonstrated remarkable affinity for acidic organic molecules in solution, which was investigated by the means of various carboxylic acids including larger drug molecules. Noteworthy, competing sorption between acetic acid and its halogenated…

010405 organic chemistryHydrogen bondChemistryOrganic ChemistrySupramolecular chemistryIonic bondingProtonationSorptionGeneral ChemistryHydrogen-Bonding010402 general chemistry[ CHIM ] Chemical Sciences01 natural sciencessupramolecular chemistryCatalysis0104 chemical sciencesSolventPolymer chemistryhost-guest chemistry[CHIM]Chemical SciencesMoleculeOrganic chemistryoxalate complexporous materialHost–guest chemistryChemistry (Weinheim an der Bergstrasse, Germany)

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