Abstract
Binding of a porphyrin carboxylate anion () to tetrathiafulvalene calix[4]pyrrole (TTF-C4P) results in electron transfer from TTF-C4P to Li(+)@C60 to produce the charge-separated state (1/TTF-C4P˙(+)/Li(+)@C60˙(-)) in benzonitrile. Upon photoexcitation of , photoinduced electron transfer from the triplet excited state of to TTF-C4P˙(+) occurs to produce the higher energy charge-separated state (˙(+)/TTF-C4P/Li(+)@C60˙(-)), which decays to the ground state with a lifetime of 4.8 μs.
Highlights
Upon photoexcitation of 1, photoinduced electron transfer from the triplet excited state of 1 to tetrathiafulvalene calix[4]pyrrole (TTF-C4P)+ occurs to produce the higher energy charge-separated state (1+/TTF-C4P/ Li+@C60À), which decays to the ground state with a lifetime of 4.8 ls
We have created a supramolecular triad composed of a porphyrin anion (1), the radical cation of tetrathiafulvalene calix[4]pyrrole (TTF-C4P), and the radical anion of Li+-encapsulated C60 (Li+@C60) (Fig. 1)
We have examined the formation of the triad (1/TTF-C4P+/Li+@ C60À) by monitoring porphyrin anion-induced electron transfer from TTF-C4P to Li+@C60 in benzonitrile (PhCN)
Summary
Binding of a porphyrin carboxylate anion (1) to tetrathiafulvalene calix[4]pyrrole (TTF-C4P) results in electron transfer from TTF-C4P to Li+@C60 to produce the charge-separated state (1/TTF-C4P+/Li+@C60À) in benzonitrile. Upon photoexcitation of 1, photoinduced electron transfer from the triplet excited state of 1 to TTF-C4P+ occurs to produce the higher energy charge-separated state (1+/TTF-C4P/ Li+@C60À), which decays to the ground state with a lifetime of 4.8 ls.
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