Résumé The synthesis of a novel bisacridinium-Zn(II) porphyrin is reported and its properties investigated via electrochemical, photophysical and computational studies. Cyclic voltammetry studies revealed a two-electron oxidation of the Zn(II) porphyrin and the simultaneous one electron reductions of the two acridiniums. Using absorption, emission and ultrafast transient absorption spectroscopies, the near total fluorescence quenching observed following excitation of either the acridinium or Zn(II) porphyrin units was assigned to ultrafast electron transfer (≤0.3 ps) leading to a reduced acridinium and an oxidized porphyrin unit in the bisacridinium-Zn(II) porphyrin conjugate. In addition, computational studies were found to complement experimental results, with calculations revealing two near degenerate HOMOs for the porphyrin. Supplementary Materials: Supplementary material for this article is supplied as a separate file: crchim-100-suppl.pdf
摘要 报告了一种新型双
吖啶鎓-
锌(II)
卟啉的合成,并通过电
化学、光物理和计算研究对其性质进行了调查。循环伏安法研究表明,Zn(II)
卟啉有两个电子氧化,两个
吖啶同时有一个电子还原。利用吸收光谱、发射光谱和超快瞬态吸收光谱,在激发
吖啶鎓或 Zn(II)
卟啉单元后观察到的近完全荧光淬灭被归因于超快电子转移(≤0.3 ps),导致双
吖啶鎓-Zn(II)
卟啉共轭物中一个还原的
吖啶鎓和一个氧化的
卟啉单元。此外,计算研究还对实验结果进行了补充,计算显示
卟啉有两个接近退化的 HOMO。 补充材料: 本文的补充材料以单独文件形式提供:crchim-100-suppl.pdf