Ruthenium trisbipyridine C60 dyads linked viapara-phenyleneethynylene units have been prepared. They displayed a rapid energy transfer from Ru to C60 with a rate that was independent of distance, from 1.1 to 2.3 nm. The results are explained by a hopping mechanism involving a bridge-localized excited-state. In fact, for the longest bridge this state was lower in energy than the Ru-based MLCT state, as evidenced by the spectroscopic data.
我们制备出了连接紫原
苯乙炔单元的三联
吡啶钌 C60 二元体。它们显示了从 Ru 到 C60 的快速能量转移,其速率与距离无关,从 1.1 纳米到 2.3 纳米。这些结果可以用涉及桥定位激发态的跳跃机制来解释。事实上,对于最长的桥而言,这种状态的能量低于基于 Ru 的 MLCT 状态,光谱数据也证明了这一点。