55915-17-8Relevant articles and documents
Spectroscopic characterization, X-ray molecular structures and cyclic voltammetry study of two (piperazine) cobalt(II) meso-arylporphyin complexes. Application as a catalyst for the degradation of 4-nitrophenol
Guergueb, Mouhieddinne,Nasri, Soumaya,Brahmi, Jihed,Al-Ghamdi, Youssef O.,Loiseau, Frédérique,Molton, Florian,Roisnel, Thierry,Guerineau, Vincent,Nasri, Habib
, (2021/10/01)
Two new cobaltous-porphyrin complexes, namely (μ-piperazine)-bis[(meso-tetra(para-methoxyphenyl)porphyrinato)]cobalt(II) and (piperazine)[meso-tetra(para-chlorophenyl)porphyrin]cobalt(II) dichloromethane disolvate, with the formulas [{CoII(TMPP)}2(μ2-pipz)] (complex 1) and [CoII(TClPP)(pipz)]·2CH2Cl2 (complex 2), were used efficiently as catalysts in the degradation of 4-nitrophenol (4-NP) in an aqueous hydrogen peroxide solution. These cobalt(II)-pipz porphyrin complexes were characterized by a variety of spectroscopic methods including infrared, UV–visible, fluorescence, proton nuclear magnetic resonance, electron paramagnetic resonance (EPR) as well as mass spectrometry. A cyclic voltammetry investigation was also carried out on these two Co(II) metalloporphyrins. The EPR results indicate that both complexes 1 and 2 are paramagnetic low-spin (S = 1/2) cobalt(II) porphyrin complexes. Furthermore, the X-ray diffraction crystal structures of 1 and 2 were determined, and the intermolecular interactions were investigated by Hirshfeld surface analysis.
Co(II)-porphyrin complexes with nitrogen monoxide and imidazole: synthesis, optimized structures, electrochemical behavior and photochemical stability
Kaigorodova, Elena Yu.,Mamardashvili, Galina M.,Simonova, Olga R.,Chizhova, Nataliya V.,Mamardashvili, Nugzar Zh.
, p. 2443 - 2462 (2021/11/10)
UV-vis and 1H-NMR spectroscopy were applied to study axial coordination of imidazole (L1) and nitrogen monoxide (L2) with CoII-porphyrins (CoIIP) containing halogen substituents in the pyrrole and meso-phenyl positions of
Mechanochemical insertion of cobalt into porphyrinoids using Co2(CO)8as a cobalt source
Damunupola, Dinusha,Chaudhri, Nivedita,Atoyebi, Adewole O.,Brückner, Christian
, p. 3643 - 3652 (2020/07/30)
Cobalt porphyrinoids find broad use as catalysts or electrode materials. Traditional solution state cobalt insertion reactions into a free base porphyrinoid to generate the corresponding cobalt complex generally require fairly harsh conditions, involving the heating of the reactants in high-boiling solvents for extended period of times. We report here an alternative method of cobalt insertion: A solvent-free (at least for the insertion step) mechanochemical method using a planetary ball mill with Co2(CO)8as a cobalt source. The scope and limits of the reaction were investigated with respect to the porphyrinic substrate susceptible to the reaction conditions, the influences of different grinding aids, and bases added. While the mechanochemical method is, like other metal insertion methods into porphyrinoids, not universally suitable for all substrates tested, it is faster, milder, and greener for several others, when compared to established solution-based methods.