Composites of Bromobenzenethiol Functionalized Gold Nanoparticles and the Fluorescent Poly(Phenylene Ethynylene) pPET3OC12-sqS for Optical Biosensors
Por:
Ramos J.C., Ledezma A., Moggio I., Arias E., Vazquez R.A., Martínez C.A., Torres J.R., Ziolo R.F., García P., Sepulveda S., Yacaman M.J., Olivas A.
Publicada:
1 ene 2009
Resumen:
Bromobenzenethiol passivated gold nanoparticles were mixed with a poly(phenylene ethynylene) bearing thioester flexible sequences in order to obtain a fluorescent composite for optical biosensors. The particles and the composite were characterized by (1)H, (13)C NMR, UV-Vis and fluorescence spectroscopy, TEM and STEM. The particles are homogeneously dispersed in the polymer matrix as observed by electron microscopy. The NMR spectra suggest that the gold particles and the poly(phenylene ethynylene) are probably interacting through the sulfur atoms of the -C(O)S- and -CH(2)-S-CH(2)- moieties of the flexible sequences of the polymer as well as through pi-pi interactions between the aromatic ring of 4-bromobenzenthiol and the conjugated backbone of pPET3OC12-sqS. The quantum yield of the composite both in solution and in solid state films is slightly lower than that of pPET3OC12-sqS because of the quenching effect of gold. Nonetheless, a change of the fluorescence intensity of the composit
Filiaciones:
Ramos J.C.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Universidad Autónoma de Ciudad Juárez, Henry Dunant 4016, Ciudad Juárez, Mexico
Ledezma A.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Moggio I.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Arias E.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Vazquez R.A.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Martínez C.A.:
Universidad Autónoma de Ciudad Juárez, Henry Dunant 4016, Ciudad Juárez, Mexico
Torres J.R.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
Ziolo R.F.:
CIQA, Boulevard Enrique Reyna 140, 25253 Saltillo, Mexico
García P.:
Universidad Autónoma de Ciudad Juárez, Henry Dunant 4016, Ciudad Juárez, Mexico
Sepulveda S.:
Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, United States
Yacaman M.J.:
Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, United States
Olivas A.:
UNAM, Ctr Ciencia Mat Condensada, Ensenada 22800, BC, Mexico
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