engleski

A multi-responsive [2]rotaxane endowed with an imidazole-derived photochromic station

Rotaxanes are a class of mechanically interlocked molecules (MIMs) in which a macrocycle ring encircles a molecular dumbbell-shaped axle that prevents the ring dethreading. The chemical properties of these molecules are determined by the supramolecular interactions of the different chemical entities (axle and macrocycle) that are entangled in space. Imidazole is a heterocycle with a versatile chemistry that permits its use in very different areas, including supramolecular chemistry and MIMs. In this work, an imidazole-derived photoactive unit was used as the recognition site for a crown ether macrocycle in a [2]rotaxane. Such an arrangement enables the control of the ring interaction with the photoactive unit. The unique properties of the designed interlocked molecule were studied through NMR spectroscopy and UV- Visible spectroscopy. Beyond the interesting photophysical aspects, this [2]rotaxane is attractive for the development of photoactive molecular machines and multi-responsive materials.

azoimidazole ; molecular machine ; non-equilibrium process ; photochemistry ; rotaxane

nije evidentirano