Interactions between an Aryl Thioacetate‐Functionalized Zn(II) Porphyrin and Graphene Oxide |
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| Authors: | Boyang Mao David G Calatayud Vincenzo Mirabello Benjamin J Hodges José Alberto Ribeiro Martins Stanley W Botchway John M Mitchels Sofia I Pascu |
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| Affiliation: | 1. Department of Chemistry, University of Bath, Claverton Down, Bath, UK;2. Centro de Engenharia Biológica and Departamento de Química, Universidade do Minho, Braga, Portugal;3. Central Laser Facility, Rutherford Appleton Laboratory, Research Complex at Harwell, STFC, Didcot, UK |
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| Abstract: | The surface modification of graphene oxide (GO) is carried out via the supramolecular functionalization route using a Zn(II)‐porphyrin which is soluble in common organic solvents on basis of long alkyl chains present at the exocyclic positions. This acts as a dispersing agent and decorates the surface of the graphene oxide uniformly, giving rise to a new nanohybrid denoted Zn(II)‐porphyrin@GO. The resulting Zn(II)‐porphyrin@GO nanohybrid forms a stable dispersion in ethanol (as characterized by several different spectroscopic techniques such as UV–vis, Fourier transform infrared, Raman). The morphology of Zn(II)‐porphyrin@GO nanohybrid is investigated by atomic force microscopy (AFM) and transmission electron microscope (TEM)/selected area electron diffraction. Both TEM and AFM measurements indicate that the Zn(II)‐porphyrin self‐assemble onto the surface of graphene oxide sheets. Steady‐state and time‐resolved fluorescence emission studies in the dispersed phase, and as a thin film, point toward the strongly quenched fluorescence emission and lifetime decay, suggesting that energy transfer occurs from the singlet excited state of Zn(II)‐porphyrin unit to GO sheets. |
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| Keywords: | AFM studies fluorescence emission titrations graphene oxide porphyrin UV– vis titrations |
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