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Radical Metal-Organic Rotaxane Frameworks

par webmestre - publié le

Radical Metal-Organic Rotaxane Frameworks

A new method is described enabling to get 3D - Metal-Organic Rotaxane Framework (MORF) crystals featuring cucurbit[7]urils as rings and viologens as active pillars which, upon photoexcitation are reduced to colorfull viologen radicals. The crystals are so photochromic and change their color from yellow to green reversibly.
 

A single-crystal-to-single-crystal transformation affording photochromic 3D-MORF crystals
Xue Yang, Michel Giorgi, Hakim Karoui, Didier Gigmes, Virginie Hornebecq, Olivier Ouari, Anthony Kermagoret and David Bardelang
Chem. Commun., 2019,55, 13824-13827
DOI : 10.1039/C9CC07121K.