Showing papers by "Philippe Guionneau published in 2022"
TL;DR: In this article , the synthesis of a new 4-[2-(1-methyl-1H-imidazol-2-ylsulfanyl)-acetylamino]-benzenesulfonic acid from available reagents using an efficient strategy was reported, and its antimicrobial ability against bacterial strains was investigated.
7 citations
TL;DR: In this article, two new compounds based on one mononuclear nickel(II) and one homobinuclear copper (II) complexes respectively and of general formula [Ni(dmbpy)2(CH3COO)]ClO4 (1) and [Cu2(dmpy) 2(CH 3COO)3]ClO 4 (2) with dmbpy = 5,5′-dimethyl-2,2.2′-bipyridine, were synthesized by hydrothermal treatment.
2 citations
TL;DR: In this article , a new organic-inorganic hybrid C4H10Cl3NO2Sn that crystallizes in a monoclinic system with C2/c space group and unit cell parameters was investigated.
1 citations
TL;DR: In this article , the authors discuss the synthesis of nontoxic Mn(II) halide coordination polymer and explore the potential light emission properties for solar-cell devises through experimental and computational studies.
TL;DR: In this article , a new organo-sulfate (N(C2H5)4[HSO4][H2SO4]2) was studied using X-ray diffraction, DFT, Hirshfeld surface analysis, thermal analysis, and IR, Raman, NMR, and impedance spectroscopy.
TL;DR: One pot reactions of phenylphosphonic acid or phenylarsonic acid with cyclohexylamine led to two new organic-inorganic hybrid salts [C6H14N][c6H5PO3H2.H2O] as discussed by the authors .
Abstract: One pot reactions of phenylphosphonic acid or phenylarsonic acid with cyclohexylamine led to two new organic-inorganic hybrid salts [C6H14N][C6H5PO3H.C6H5PO3H2.H2O] (1) and [(C6H14N)(C6H5AsO3H)] (2) which were investigated by single-crystal X-ray diffraction analysis. Salt 1 crystallizes in the monoclinic system, space group P21/nwith a = 12.3963 (4), b = 6.1123 (2), c = 28.2081 (8) Å, β = 90.426 (1)°, V = 2137.27 (12)Å3 and Z = 4. Salt 2 crystallizes in the monoclinic system, space group P21/c with a = 12.3991 (5), b = 6.5048 (2), c = 18.5466 (7) Å, β = 105.824 (2)°, V = 1439.16 (9) Å3 and Z = 4. In the co-crystal 1, the hydrogen phenylphosphonate anions are organized into dimers via O–H···O H-bonds, whereas the phenylphosphonic acid and the water molecules are connected, through Owater–H···O and O–H···O hydrogen bonding interactions, to form dimers. Inter-species O–H···O hydrogen bonds connect the alternating dimers into anionic infinite chains. The 1D infinite ribbons are linked into an anionic 2D layer-like structure, by means of water molecules through Owater–H···O and O–H···Owater. The cyclohexylammonium interacts via N–H···O hydrogen bonds, to consolidate the compactness of the 2D layer-like structure. In the crystal of salt 2, the hydrogen phenylarsonate anions are organized into dimers through O–H···O H-bonds. Hydrogen bonded dimers are connected by the cyclohexylammoniumcations, through N–H···O hydrogen bonds, leading to the formation of an infinite ribbon. The 1D hydrogen bonded ribbons are interlinked through N–H···O hydrogen bonding interactions giving rise to a 2D layer-like structure.
TL;DR: In this paper , a family of molecular cis-[FeII(X-PPMA)2(NCS)2]·H2O [4-X-N-(phenyl(pyridin-2-yl)methylene)aniline; X = -Cl (1), -Br (2), and -CH3 (3)] complexes that exhibit spin crossover behaviour above room temperature.
Abstract: We present herein a family of molecular cis-[FeII(X-PPMA)2(NCS)2]·H2O [4-X-N-(phenyl(pyridin-2-yl)methylene)aniline; X-PPMA; X = -Cl (1), -Br (2), and -CH3 (3)] complexes that exhibit spin crossover behaviour above room temperature. Judiciously designed bidentate N-donor Schiff bases of 2-benzoylpyridine and para-substituted anilines in combination with Fe(NCS)2 were used for the synthesis of complexes 1-3. The relatively strong ligand field of the Schiff bases stabilises the low spin state of iron(II) up to 300 K which is evident from magnetic measurements, room temperature Mössbauer spectra and crystallographic bond/angle distortion parameters. Interestingly, complexes 1-3 crystallize in a tetragonal system with either a P43212 or P41212 chiral space group from achiral building units due to the supramolecular helical arrangements of molecules through intermolecular (pyridine)C-H⋯C(NCS) interactions in the crystalline state. Complexes 1 and 2 exhibit complete, gradual and slightly irreversible spin crossover behaviour in the temperature range of 300-500 K with equilibrium temperatures (T1/2) 375 K (1) and 380 K (2). The spin state evolution of iron(II) in complexes 1 and 2 is monitored between 150 K and 450 K through variable temperature crystallographic studies in the warming mode. The structural data are in good agreement with the 94% (1) and 87% (2) high spin conversion of iron(II) at 450 K. At a high temperature (450 K), some minor irreversible ligand motion is noticed in complexes 1 and 2, in addition to a complete solvent loss that may induce the slight irreversibility of the spin crossover. On the other hand, complex 3 shows a complete and gradual spin crossover in the temperature range of 10-475 K with strong irreversible features. The equilibrium temperatures obtained upon first warming (T1/2↑) and second cooling (T1/2↓) are 375 K and 200 K, respectively. In complex 3, the loss of a water molecule triggers strong deviations in the spin crossover behaviour. Moreover, dehydrated complex 3 exhibits photoswitching LIESST effect with a relaxation temperature T(LIESST) = 60 K.