Meso-tetrakis(3,4,5-trimethoxyphenyl)porphyrin derivatives: Synthesis, spectroscopic characterizations and adsorption of NO2

Effect of the coordination of π-acceptor 4-cyanopyridine ligand on the structural and electronic properties ofmeso-tetra(para-methoxy) andmeso-tetra(para-chlorophenyl) porphyrin cobalt(ii) coordination compounds. Application in the catalytic degradation of methylene blue dye

“…The spectroscopic, structural, magnetic and electrochemical properties of metalloporphyrins involving several metal ions such as Fe(II), Fe(III), Zn(II), Cd(II), Sn(IV), Mg(II), Mn(III) and Co(II) have been investigated by our group for more than two decades. [1][2][3][4][5][6][7] The study of these tetrapyrrolic coordination compounds is of great importance because they provide good models for understanding the structural, electronic and magnetic properties of hemoproteins and heme-like enzymes such as cytochromes P450. Recently, porphyrins and porphyrin related compounds are nding crucial use in new applications such as catalysis in solar photovoltaic cells, [8][9][10] as chemical sensors 11,12 and as photosensitizing agents (PS) for photodynamic therapy (PDT).…”

Substituent Effect on Porphyrin Film-Gas Interaction by Optical Waveguide: Spectrum Analysis and Molecular Dynamic Simulation

“…Researchers reported that the NO 2 molecule might bind to one of the carbon atoms on meso position on porphyrin rings modifying the electron distributions on porphyrin macrocycle [ 62 , 63 ]. According to the spectral behavior of the film with gas exposures in our research, as can be seen in Figure 6 , we regard the presence of protonation and formation of supramolecules that was composed of host and guest molecules [ 64 ]. Formation of the peculiar peak at 650–700 nm, especially strong for TPP and TBPP porphyrins, might be accused to the richer electron densities on these two macrocycles that was caused by the electron-pushing group such as t–butyl [ 65 ].…”

Experimental and Theoretical Study on Crown Ether-Appended-Fe(III) Porphyrin Complexes and Catalytic Oxidation Cyclohexene with O2

“…However, a decrease in total conversion and selectivity of 1 was observed at 77 • C (Entry 6 of Table 1). This phenomenon could be attributed to the possible decomposition of the FeTC 4 PCl catalyst and intermediate peroxides in the reaction, which may have been accelerated due to the higher temperature, leading to the decomposition of the peroxides by the metal porphyrin and the decomposition of the metal porphyrin by the peroxides [19]. Additionally, it was observed that at 70 • C, 1 rapidly oxidized to other products, indicating that 70 • C exceeded the optimum reaction temperature.…”

“…Metalloporphyrin complexes exhibit exceptional catalytic properties for various chemical transformations, including O-O bond heterolysis [1][2][3][4], H-H bond formation [5,6], O 2 adsorption [4,7,8], and catalytic oxidation [9][10][11][12] due to high activity, stability, clear molecular structure, and the ability to mimic the cytochrome enzyme [13,14]. Previous studies have shown that changing the meso-position substituents of metalloporphyrins to modulate their redox properties can alter metal ions' activities, stability, and selectivity in catalytic processes [15][16][17][18][19][20][21]. Strong electron-absorbing meso-position substituents can make the metalloporphyrins easy to reduce, while electron-donating substituents can increase the electron-cloud density on the metal ion, enhancing its binding and electron transfer ability with O 2 [22,23].…”