The influence of D2O on the photophysical properties of meso-tetra (4-sulphonatophenyl) porphine, photosan III (cas 136219-06-2) and tetrasulphonated aluminium and zinc phthalocyanines

Add time:08/31/2019    Source:sciencedirect.com

Kinetic spectroscopy was employed to study the effect of D2O on the lifetime of triplet states and bimolecular quenching constants of meso-tetra(4-sulphonatophenyl) porphine, photosan III (cas 136219-06-2) and tetrasulphonated aluminium and zinc phthalocyanines by oxygen. The natural lifetime of the triplet states of all the compounds increases in alkaline D2O medium, while their reactivity with oxygen remains similar as in H2O solution. The dependence of the rate constant for deactivation of triplet states on the D2O concentration is linear. The increase in the lifetime of the triplet states of the given species in D2O is apparently not a consequence the lower self-quenching rate caused by the different viscosity of the two solvents, but rather by the different vibrational coupling between the terminal sulpho-groups of the sensitizer and the solvent shell or isotopic substitution of a hydrogen atom by deuterium in the given species.

We also recommend Trading Suppliers and Manufacturers of photosan III (cas 136219-06-2). Pls Click Website Link as below: cas 136219-06-2 suppliers

Prev:Concentration and fluence dependence of the disturbance of the membrane integrity of human fibroblasts by the photodynamic action of photosan III (cas 136219-06-2)
Next:Regular ArticleUltrastructural Changes in PAM Cells After Photodynamic Treatment with Delta-Aminolevulinic Acid-Induced Porphyrins or Photosan)