Bharmoria Pankaj, Ghasemi Shima, Edhborg Fredrik, Losantos Raúl, Wang Zhihang, Mårtensson Anders, Morikawa Masa-Aki, Kimizuka Nobuo, İşci Ümit, Dumoulin Fabienne, Albinsson Bo, Moth-Poulsen Kasper
Department of Chemistry and Chemical Engineering, Chalmers University of Technology Kemivägen 4 412 96 Gothenburg Sweden
Department of Chemistry and Molecular Biology, University of Gothenburg Kemigården 10, Göteborg 412 96 Gothenburg Sweden.
Chem Sci. 2022 Sep 14;13(40):11904-11911. doi: 10.1039/d2sc04230d. eCollection 2022 Oct 19.
We report the first example of direct far-red triplet sensitized molecular photoswitching in a condensed phase wherein a liquid azobenzene derivative (Azo1) co-assembled within a liquid surfactant-protein film undergoes triplet sensitized -to- photoswitching upon far-red/red light excitation in air. The role of triplet sensitization in photoswitching has been confirmed by quenching of sensitizer phosphorescence by -Azo1 and temperature-dependent photoswitching experiments. Herein, we demonstrate new biosustainable fabrication designs to address key challenges in solid-state photoswitching, effectively mitigating chromophore aggregation and requirement of high energy excitations by dispersing the photoswitch in the trapped liquid inside the solid framework and by shifting the action spectrum from blue-green light (450-560 nm) to the far-red/red light (740/640 nm) region.
我们报道了凝聚相中直接远红光三重态敏化分子光开关的首个实例，其中一种液态偶氮苯衍生物（Azo1）在液态表面活性剂 - 蛋白质膜内共组装，在空气中经远红光/红光激发后发生三重态敏化到光开关转变。通过 -Azo1猝灭敏化剂磷光以及温度依赖性光开关实验，证实了三重态敏化在光开关中的作用。在此，我们展示了新的生物可持续制造设计，以应对固态光开关中的关键挑战，通过将光开关分散在固体框架内捕获的液体中，并将作用光谱从蓝绿光（450 - 560 nm）转移到远红光/红光（740/640 nm）区域，有效减轻发色团聚集和高能激发的需求。
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