Substituent-Dependent Photoexcitation Processes of Π-Stacked Ion Pairs.
Chemistry(2023)
摘要
Porphyrin ion pairs, the charge of which is delocalized in core units, form tightly associated structures through (i)pi-(i)pi interactions. 5,10,15-Triphenyl-substituted porphyrin-Au-III complex, which is favorable for forming stacked structures in the form of a stable ion, has been synthesized. Ion-pair metathesis based on the hard and soft acids and bases theory enabled combination with porphyrin anions possessing electronic states controlled by electron-donating and electron-withdrawing groups. Transient absorption spectroscopy suggested that the lifetimes of the radical pairs generated by photoinduced electron transfer of the ion pairs could be controlled by a judicious combination of the anions and cations.
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关键词
charged pi-electronic systems,electron transfer,ion pairs,porphyrins,radicals
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