Abstract
Photoinduced electron transfer (PET) was studied in toluene solutions of the Pd-porphyrin-quinone (Pd-PQ) dyad by flash photolysis in the picosecond time range and by a luminescence method. It is found that Pd-PQ has a high rate of intercombination conversion Kisc=(7.7±0.2)·1010 sec−1. Competing intramolecular PET occurs from the lower excited singlet state of the dyad with the rate constant K set =(2.7 ±0.3)·1010 sec−1. Therefore, ∼74% of excited molecules from the dyad make a transition to the triplet T1 state and 26% take part in intramolecular PET resulting in formation of radical products. The radical products relax to the ground state with the rate constant K=(7.4±0.2)·109 sec−1.
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Institute of Molecular and Atomic Physics of the National Academy of Sciences of Belarus, 70, F. Skorina St., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 1, pp. 11–18, January–February, 1999.
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Losev, A.P., Volkovich, D.I. & Tikhomirov, S.A. Intramolecular photoinduced electron transfer in Pd-porphyrin-quinone in the picosecond time range. J Appl Spectrosc 66, 7–14 (1999). https://doi.org/10.1007/BF02679212
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DOI: https://doi.org/10.1007/BF02679212