Publication Details (including relevant citation information):
Mao, Boyang, Calatayud, David G., Mirabello, Vincenzo, Hodges, Benjamin J., Martins, José Alberto Ribeiro, Botchway, Stanley W., Mitchels, John M., Pascu, Sofia I., Cortezon-Tamarit, F., Sarpaki, S., Calatayud, D.G., Mirabello, V., Pascu, S.I., Chen, Chi-Tien, Fischer, Mark E., Windsor, Caroline, Vei, Ino C., Calatayud, David G., Green, Malcolm L.H., Pascu, Sofia I. Advanced Functional Materials 2016 26 (5) 687-697
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.
Address (URL): http://doi.wiley.com/10.1002/adfm.201504147