Abstract
Abstract The efficiency of the photosensitized generation of singlet oxygen ( 1 O 2 ) with meso -phenyl substituted tetrabenzoporphyrin metallo complexes as sensitizer was determined from the limiting quantum yield of the (+)-limonene photooxygenation and compared with that of hematoporphyrin (HP), which has been known to serve as an effective sensitizer, using a HeNe laser light (633 mm). Among the diamagnetic (Mg, Zn, and Cd) complexes treated here, the Zn complexes were most efficient for the (+)-limonene photooxygenation with the limiting quantum yields of Φ(−A)=0.4. This result was comparable to that of HP. The direct observation of the intensity of 1 O 2 emission by the laser flash photolysis technique supported these results.
Published Version
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