title: Singlet oxygen emission at 1270 nm in protoporphyrin solution excited by argon laser.
abstract: The direct observation of dye-photosensitized 1270 nm emission of the 1 delta g leads to 3 sigma g transition of molecular oxygen in liquid solution is reported. Singlet oxygen was photosensitized by argon laser excitation of protoporphyrin in carbon tetrachloride.
mesh_terms: D007834:Lasers; D010100:Oxygen; D011166:Porphyrins / Q000528:radiation effects*; D011524:Protoporphyrins / Q000528:radiation effects*; D012996:Solutions; D013055:Spectrophotometry, Infrared
chemical_list: D011166:Porphyrins; D011524:Protoporphyrins; D012996:Solutions; D010100:Oxygen