Light-induced piston nanoengines: ultrafast shuttling of a styryl dye inside cucurbit[7]uril,Physical Chemistry Chemical Physics

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Light-induced piston nanoengines: ultrafast shuttling of a styryl dye inside cucurbit[7]uril
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2017-09-08 00:00:00 , DOI: 10.1039/c7cp04283c
Ekaterina Y. Chernikova _{1,

2,

3,

4} , Daria V. Berdnikova _{1,

2,

3,

4,

5} , Yuri V. Fedorov _{1,

2,

3,

4} , Olga A. Fedorova _{1,

2,

3,

4} , François Maurel _{6,

7,

8,

9,

10} , Gediminas Jonusauskas _{10,

11,

12,

13}

Affiliation

The combination of photoactive styryl(pyridinium) dyes and cucurbit[7]uril (CB[7]) in an integrated supramolecular system allowed us to design a novel high speed molecular machine based on the fully reversible shuttling motion of the dye inside the CB[7] host cavity. The driving force of this movement is the electrostatic potential change after the occurrence of intramolecular charge transfer in the excited state of the dye molecule that can be externally controlled by light. Steady-state and time-resolved optical spectroscopy as well as DFT calculations provided an unambiguous evidence for the ultrafast piston-like movement of the system between two states. The shuttling process occurs in the picosecond timescale and its bistability depends on the strength of the dye donor fragment.

中文翻译：

光诱导活塞纳米引擎：葫芦丝内苯乙烯基染料的超快穿梭[7]

在集成的超分子系统中将光敏苯乙烯（吡啶）染料和葫芦[7]尿素（CB [7]）结合使用，使我们能够基于染料在CB内的完全可逆穿梭运动来设计一种新型的高速分子机器。 7]宿主腔。该运动的驱动力是在染料分子的激发态下发生分子内电荷转移之后发生的静电势变化，该染料分子可以通过光来外部控制。稳态和时间分辨光谱以及DFT计算为系统在两种状态之间的超快活塞状运动提供了明确的证据。穿梭过程发生在皮秒级的时间范围内，其双稳态取决于染料供体片段的强度。

更新日期：2017-09-25

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