POSITION-DEPENDENT DEUTERIUM ISOTOPE EFFECT ON THE TRIPLET STATE LIFETIME OF PORPHYRINS
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Publisher:Ohio State University
The triplet state lifetime of selectively deuterated porphyrins was measured at low temperature in glassy matrixes. The lifetime was found to depend critically on the position of the deuterium substitution. In the case of porphin free base, deuteration of the two imino positions is more than three times as effective in reducing radiationless decay as deuteration of all twelve ring positions. The results will be discussed in terms of porphyrin electronic structure and of other related experimental results.
Author Institution: Department of Chemistry, The Pennsylvania State University
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