On the coordination reaction of pyridine by chloroindiumtetraphenylporphyrin and its thermodynamic properties

The axial interaction of chloroindiumtetraphenylporphyrin with pyridine is studied in a mixed binary benzene-pyridine solvent of variable composition. Thermodynamic parameters of the process are determined. It is concluded on the basis of the results that the binding of pyridine to chloroindiumtetraphenylporphyrin is a low-characteristic reaction.     

Photogeneration of singlet molecular oxygen (1O2, 1Δ g ) using monomeric and aggregated forms of copper tetra-4-(morpholine-4-yl)-tetra-5-(2-naphthoxy)phthalocyanine in organic solvents

Luminescence and chemical acceptors methods were used to study the photosensitized formation of singlet molecular oxygen (¹O₂, ¹?? _g ) by monomer and aggregated forms of copper tetra-4-(morpholine-4-yl)-tetra-5-(2-naphthoxy)phthalocyanine in benzene, benzene-d ₆, acetone, DMF, and pyridine. The values of ¹O₂ quantum yield were determined. The effectiveness of the ¹O₂ photoproduction was shown to be reduced due mainly to the aggregation of the copper phthalocyanine molecules.     

Kinetics of bimolecular oxidation of anthracene with singlet molecular oxygen (1Δg) in organic and aqueous-organic media and in water

The kinetics of photosensitized oxidation of anthracene with singlet molecular oxygen (¹??_g) in organic and aqueous-organic media were studied. The bimolecular rate constant of the reaction was determined, and its relation to solvent properties was revealed. On the basis of the obtained data, the empirical reaction rate constant in water was estimated at 2.3 × 10⁶ l mol^?1 s^?1.     

Solvent effect on the photogeneration of singlet molecular oxygen by copper tetra(tert-butyl)phthalocyanine

The photogeneration of the singlet molecular oxygen (¹O₂) by copper tetra(4-tert-butyl) phthalocyanine in organic solvents of different nature was substantiated. The apparent quantum yields of ¹O₂in benzene and pyridine were determined. The data obtained indicate an influence of the coordinating properties of the solvent on the ¹O₂yield. However, this factor is not “critical” as in the case of photogeneration of ¹O₂by copper tetra(5-tert-butylpyrazino)porphyrazine.     

The effect of solvent on tetracene oxidation by singlet molecular oxygen (Δg): aspects of specific solvation

It is evident that the solvent effect on tetracene oxidation by singlet molecular oxygen is predominantly conditioned by a specific solvation of the reaction intermediate in aprotic media that is assumed to be a state with a stressed anionic center.     

The rate of tetracene oxidation with singlet oxygen in 1,4-dioxane-water and pyridine-water mixed solvents as a function of water concentration

The kinetics of tetracene oxidation with singlet molecular oxygen in 1,4-dioxane-water and pyridine-water mixed solvents was studied. Water was found to accelerate the reaction. The kinetic effect observed was explained by the solvation properties of water molecules incorporated into the network of H-bonds.