David G. Calatayud - Thermally Reduced Graphene Oxide Nanohybrids of Chiral Functional Naphthalenediimides for Prostate Cancer Cells Bioimaging

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      Publication Details (including relevant citation   information):

      Tyson, James A., Mirabello, Vincenzo, Calatayud, David G., Ge,   Haobo, Kociok-Köhn, Gabriele, Botchway, Stanley W., Dan Pantoş,   G., Pascu, Sofia I., Sesmero, Ester, Calatayud, David G., Perles,   Josefina, López-Torres, Elena, Mendiola, M. Antonia, 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 (31)   5641-5657

      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.201601123