Nazari Haghighi Pashaki Maryam, Bösch Caroline D, Garo Florian, Blanc Ambre, Marazzi Marco, Rondi Ariana, Gazzetto Michela, Akbarimoosavi Maryam, Tremblay Jean-Christophe, Langenegger Simon Matthias, Monari Antonio, Häner Robert, Feurer Thomas, Cannizzo Andrea
Institute of Applied Physics, University of Bern, Sidlerstrasse 5, Bern, CH-3012, Switzerland.
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, Bern, CH-3012, Switzerland.
Angew Chem Int Ed Engl. 2025 Sep 15;64(38):e202513001. doi: 10.1002/anie.202513001. Epub 2025 Aug 1.
Ultrafast long-range energy transfer with unitary quantum-yield has been studied in a novel family of artificial DNA-guided multichromophoric antenna complexes with phenanthrene moieties as light harvesters. By means of femtosecond transient absorption spectroscopy and time-dependent density function theory calculations, we demonstrate that the highly efficient long-range energy transfer occurs via a coherent mechanism. It is enabled by photoexcitation of higher lying delocalized excited states of phenanthrene, and hence, can be labelled anti-Kasha in nature. Moreover, we show the important contribution of exciplex formation between acceptor and closest donor.
在一类以菲基团作为光捕获剂的新型人工DNA引导多发色团天线复合物中，研究了具有单一量子产率的超快长程能量转移。通过飞秒瞬态吸收光谱和含时密度泛函理论计算，我们证明了高效的长程能量转移是通过相干机制发生的。它是由菲的较高局域化激发态的光激发实现的，因此在本质上可被标记为反卡莎规则。此外，我们展示了受体与最接近供体之间激基复合物形成的重要贡献。
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