A pyrene-appended spiropyran for selective photo-switchable binding of Zn(II): UV–visible and fluorescence spectroscopy studies of binding and non-covalent attachment to graphene, graphene oxide and carbon nanotubes. Issue 38 (23rd September 2015)

• Record Type: Journal Article
• Authors: Perry, Alexis; Green, Stephen J.; Horsell, David W.; Hornett, Sam M.; Wood, Mark E.
• Is Part Of: Tetrahedron. Volume 71:Issue 38(2015)
• Page Start: 6776
• Page End: 6783
• Publication Date: 2015-09-23
• Subjects: Spiropyran -- Merocyanine -- Graphene -- Carbon nanotubes -- Zinc detection -- Photochromic compounds; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2015.07.035
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: Synthesis of photo-switchable, Zn 2+ sensitive hybrid materials was achieved by facile non-covalent functionalization of graphene, graphene oxide and carbon nanotubes with a pyrene-appended spiropyran. Solution phase binding studies, using UV–visible and fluorescence spectroscopy, indicated that the pyrene-spiropyran dyad was highly selective for Zn 2+ over a range of potentially competitive cations and that binding occurred with 1:1 stoichiometry and a binding constant of K =1.4×10 4 mol −1 dm 3 at 295 K. Zn 2+ binding was promoted by UV irradiation or in darkness and reversed upon irradiation with visible light. Graphical abstract: