Amati Agnese, Natali Mirco, Indelli Maria Teresa, Iengo Elisabetta, Würthner Frank
Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy.
Current address: Institut de Chimie de Strasbourg, Université de Strasbourg, rue Blaise Pascal 4, 67000, Strasbourg, France.
Chemphyschem. 2019 Sep 3;20(17):2195-2203. doi: 10.1002/cphc.201900611. Epub 2019 Aug 5.
A side-to-face array DPy-gPBI[Ru(4-tBuTPP)(CO)] , based on a "green" perylene bisimide chromophore sandwiched between two Ru -porphyrins, has been prepared by self-assembly. Its photophysical properties have been characterized in detail by a combination of steady-state and time-resolved techniques upon selective excitation of the two different components. Different photoinduced processes are observed as a function of the excitation wavelength. Electron transfer quenching is attained upon "red light" excitation of the perylene unit, whilst an energy transfer pathway is followed upon "green light" excitation of the metallo-porphyrin moiety. Regardless of the excitation wavelength efficient population of the triplet excited state of the perylene chromophore is achieved. The photophysical results are discussed within the framework of classical electron transfer theory and compared with those of a previously reported system.
一种基于夹在两个钌卟啉之间的“绿色”苝双酰亚胺发色团的面对面排列的DPy-gPBI[Ru(4-tBuTPP)(CO)]已通过自组装制备。通过稳态和时间分辨技术相结合，在选择性激发两种不同组分时，对其光物理性质进行了详细表征。观察到不同的光诱导过程是激发波长的函数。在苝单元的“红光”激发下实现电子转移猝灭，而在金属卟啉部分的“绿光”激发下遵循能量转移途径。无论激发波长如何，都能有效地使苝发色团的三重激发态富集。在经典电子转移理论的框架内讨论了光物理结果，并与先前报道的系统进行了比较。
