Synthesis, molecular structure, spectroscopic characterization and antibacterial activity of the pyrazine magnesium porphyrin coordination polymer - Archive ouverte HAL
Article Dans Une Revue Journal of Molecular Structure Année : 2021

Synthesis, molecular structure, spectroscopic characterization and antibacterial activity of the pyrazine magnesium porphyrin coordination polymer

Résumé

A new material of magnesium(II) polymer compound with the formula {[Mg II (TPP)( pz )] •0.5[Mg II (TPP)] •CH 2 Cl 2 } n (I), (TPP) = meso –tetraphenylporphyrinato and pz = pyrazine) was syn- thetized and characterized by IR, UV-visible, PL photoluminescence and 1 H NMR spectroscopy studies, single-crystal XRD analyses and cyclic voltammetry. The crystal structure of (I) is made by the 1D {[Mg(TPP)( pz )]} polymeric chains (molecules I(A)) where the tetracoordinated magnesium(II) complexes [Mg(TPP)] (molecules I(B)) are located as well as the dichloromethane solvent molecules. The crystal packing of (I) is stabilized by intermolecular C –H Cg πinteractions where Cg is the centroid of phenyl and pyrrole rings. Additionally, the photophysical properties have been evaluated by UV-visible absorption and fluorescence emission spectroscopies. The UV-visible spectrum of (I) shows a redshift Soret band value (428 nm) compared to that of the free base H 2 TPP porphyrin while the λmax values of the Q bands are in the range 560 –610 nm. The optical gap of (I) was estimated at 1.99 eV. The cyclic voltammogram of the title compound presents two reversible oxidation waves and one reversible reduction wave. The HOMO and LUMO energy values were deduced from the voltammogram which are -4.96 and -2.85 eV respectively. Furthermore, bioactivity investigations revealed that the free porphyrin, the starting material [Mg II (TPP)] and complex (I) could be used as potential antibacterial agents.
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Dates et versions

hal-04692738 , version 1 (10-09-2024)

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Arbia Ben Khelifa, Khaireddine Ezzayani, Mouhieddinne Guergueb, Frédérique Loiseau, Eric Saint-Aman, et al.. Synthesis, molecular structure, spectroscopic characterization and antibacterial activity of the pyrazine magnesium porphyrin coordination polymer. Journal of Molecular Structure, 2021, 1227, pp.129508. ⟨10.1016/j.molstruc.2020.129508⟩. ⟨hal-04692738⟩
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