Corrole and Corrole Functionalized Silica Nanoparticles as New Metal Ion Chemosensors: A Case of Silver Satellite Nanoparticles Formation

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• 作者：Carla I. M. Santos ; Elisabete Oliveira ; Javier Fern谩ndez-Lodeiro ; Joana F. B. Barata ; S茅rgio M. Santos ; M. Amparo F. Faustino ; Jos茅 A. S. Cavaleiro ; M. Gra莽a P. M. S. Neves ; Carlos Lodeiro
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：August 5, 2013
• 年：2013
• 卷：52
• 期：15
• 页码：8564-8572
• 全文大小：568K
• 年卷期：v.52,no.15(August 5, 2013)
• ISSN：1520-510X

文摘

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⁺, Pb²⁺, 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 尾-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.