749216-79-3Relevant academic research and scientific papers
Corrole and corrole functionalized silica nanoparticles as new metal ion chemosensors: A case of silver satellite nanoparticles formation
Santos, Carla I. M.,Oliveira, Elisabete,Fernandez-Lodeiro, Javier,Barata, Joana F. B.,Santos, Sergio M.,Faustino, M. Amparo F.,Cavaleiro, Jose A. S.,Neves, M. Graca P. M. S.,Lodeiro, Carlos
, p. 8564 - 8572 (2013/09/02)
Corrole macrocycles are very appealing dyes for incorporation into light harvesting devices. This work shows the sensorial ability of 5,10,15-tris(pentafluorophenyl)corrole 1 and its monoanionic species toward Na+, Ca2+, Cu2+, Cd2+, Pb 2+, Hg2+, Ag+, and Al3+ metal ions in toluene and acetonitrile. The photophysical studies toward metal ions were carried out by absorption and emission spectroscopy. From all metal ions studied, corrole 1 shows to be colorimetric for Hg2+ allowing a naked-eye detection of Hg2+ through a change of color from purple to blue in acetonitrile and from green to yellow in toluene. In addition a new β-imine corrole 4 was successful synthesized and further functionalized with 3-isocyanatopropyl-trimethoxysilane resulting in an alkoxysilane derivative 5. The grafting of alkoxysilane derivative 5 with optically transparent silica nanoparticles (SiNPs) was achieved succesfully. The new-coated silica nanoparticles with corrole 5 were studied in the presence of Cu2+, Hg2+, and Ag+ as metal ion probes. Interestingly, upon addition of Ag+, groups of satellite AgNPs were formed around the SiNPs and were checked by transmission electron microscopy (TEM). At same time, a change of color from green to yellow was observed.
