Photophysical Aspects of Potential Fluorescent Probes Based on Fluorophore@Metal Nanoparticles

CARRIZO, A. F.; SCHMIDT, L. C.; ARGÜELLO, J. E.; PEÑÉÑORY, A. B.; VEGLIA, A. V; PACINONI, N. L.

Ottawa

Conferencia; 98th Canadian Chemistry Conference; 2015

Fluorescence spectroscopy has become a relevant tool in the areas of Analytical and Bioanalytical Chemistry due to its great sensitivity and versatility. Current requirements of developing detection protocols in those areas lead to the continuous necessity of obtaining sensors more efficient and powerful based on fluorescent probes or other molecular systems.1 In order to reach this goal, one strategy is to design hybrid molecular systems containing a fluorophore and metal nanoparticles in which the fluorescence can be selectively enhanced or quenched by controlling parameters such as location, proximity and molecular dipole orientation respect to the nanoparticles surface. Within this frame, understanding the photophysical properties of this kind of hybrid systems is very important in the design of novel sensors as well as probes with enhanced luminescent properties.2 In this work we explore the photophysical properties of pyrylium cations and carbazole derivatives in the presence of gold (AuNP) and silver (AgNP) nanoparticles. The relationship between the fluorophore structure properties, nanoparticle concentration, etc and the observed fluorescence enhancement or quenching are discussed. [1] S. Zhu, T. Fischer, W. Wan, A. Descalzo and K. Rurack, Top. Curr. Chem., 2011,300, 51-91. [2] L. Yuan, W. Lin, K. Zheng, L. He and W. Huang, Chem. Soc. Rev., 2013, 42, 622-661.