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

作者：Perry Alexis^*; Green Stephen J; Horsell David W; Homett Sam M; Wood Mark E

来源：Tetrahedron, 2015, 71(38): 6776-6783.

DOI：10.1016/j.canlet.2015.07.035

• Spiropyran
• Merocyanine
• Graphene
• Carbon nanotubes
• Zinc detection
• Photochromic compounds

Synthesis of photo-switchable, Zn2+ 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 Zn2+ over a range of potentially competitive cations and that binding occurred with 1:1 stoichiometry and a binding constant of K=1.4x 10(4) mol(-1) dm(3) at 295 K. Zn2+ binding was promoted by UV irradiation or in darkness and reversed upon irradiation with visible light.

• 出版日期2015-9-23