To continue our studies on the ConPET mechanism, we have decided to move towards a naphthalene diimide (NDI) derivative as a photocatalyst. This time, to generate its radical anion (NDI•−) as we prepare for pump-pump-probe measurements, we use a triazatriangulenium monocationic dye (TATA+) as a photosensitizer. Upon excitation, 1TATA+* is populated and undergoes intersystem crossing, populating the long-lived 3TATA+* state. In the presence of DABCO, 3TATA+* undergoes reductive quenching, yielding the neutral TATA• species. The reduced state of the dye then undergoes a single electron transfer with NDI, generating free NDI•− with high efficiency.
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Contact:
Eric Vauthey
Physical Chemistry Department - Sciences II - University of Geneva
30, Quai Ernest Ansermet - CH-1211 Geneva 4 (Switzerland)
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