Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps,Photochemical & Photobiological Sciences

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Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2018-05-03 00:00:00 , DOI: 10.1039/c8pp00062j
Lorenzo Casimiro _{1,

2,

3,

4,

5} , Jessica Groppi _{4,

5,

6,

7,

8} , Massimo Baroncini _{4,

5,

6,

7,

8} , Marcello La Rosa _{4,

5,

6,

7,

8} , Alberto Credi _{4,

5,

6,

7,

8} , Serena Silvi _{1,

2,

3,

4,

5}

Affiliation

Among the plethora of photochromes reported so far, azobenzene has been proven to be the most suitable photoswitch for molecular systems and materials, due to its highly efficient and clean E–Z photoisomerization. Here we report two ammonium-based molecular axles bearing one or two p-cyanoazobenzene units at the extremities, able to form pseudorotaxanes with a crown ether macrocycle. The photochemistry of these compounds was studied in the isolated forms and in the pseudorotaxanes, showing that the functionalization speeds up the threading process without affecting the photochemical properties of the system. These results suggest that the investigated pseudorotaxanes can form the basis of new prototypes of artificial molecular-level pumps.

中文翻译：

氰基偶氮苯衍生物作为人工超分子泵的成分的光化学研究

迄今为止，在众多的光致变色材料中，偶氮苯由于其高效且清洁的E - Z光异构化，已被证明是最适合分子系统和材料的光敏开关。在这里，我们报告了两个在末端带有一个或两个对氰基偶氮苯单元的基于铵的分子轴，它们能够与冠醚大环形成拟轮烷。对这些化合物的光化学进行了分离形式和假轮烷的研究，结果表明官能化可加快穿线过程，而不会影响系统的光化学性质。这些结果表明，所研究的拟轮烷可以构成人工分子级泵的新原型的基础。

更新日期：2018-05-03

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