The production of singlet molecular oxygen (1O2) by the photosensitizing dye merocyanine 540 (MC540) bound to phosphatidylcholine liposomes has been demonstrated by direct detection of 1O2 luminescence at 1268 nm. 1O2 phosphorescence emission was enhanced in deuterated buffer and upon saturation of the sample with oxygen and could be quenched by the addition of sodium azide to the external medi...

Hg Photosensitization reactions have selectivity for volatile molecules which allows partial oxidation of alkanes and selective dehydrodimerization of a wide variety of organic molecules. Hg photosensitization via the 3P1 state (Hg') allows the dehydrodimerization and functionlization of a variety of volatile organic molecules on a 1 to 50g scale in standard laboratory photochemical equipment a...

Hepatic microsomes prepared from rats pretreated with hematoporphyrin derivative (HPD) undergo rapid enhancement of lipid peroxidation in the presence of solar radiation (~400 nm). Quenchers of singlet oxygen, including 2,5-dimethylfuran, histidine, and 0-carotene, and inhibitors of the hydroxyl radical, including benzoate, mannitol, and ethanol, largely protected against the enhancement of lip...

Cercosporin has excellent properties of photosensitization that have been widely used in organophotocatalyst and photodynamic therapy as well an antimicrobial agent. Therefore, there is a need to quantify it accurately with accessible methods. A comparative analysis cercosporin quantification obtained by spectrophotometry (SPEC) high-performance liquid chromatography (HPLC) was performed for ni...