ABSTRACT Hydrotropic anchoring of a prototype porphyrazine bearing eight ethylthio chains as peripheral substituents was shown to take place on gold nanoparticles (GNPs) by UV−vis, dynamic light scattering (DLS), Raman, resonance Raman (RR), and surface enhanced resonance Raman spectroscopy (SERRS) experiments. Density functional theory (DFT) calculations were used as a valuable help to make the hypothesis that ligation to the gold surface occurred through the concurrent contribution of the peripheral sulfur atoms and the π system of the macrocycle. The so functionalized GNPs proved to be stable in water solution for long time, thus providing a suitable chemical and structural basis to build up hierarchical structures with possible applications in technological and biomedical fields.
Hydrotropic solubilization of gold nanoparticles functionalized with proto-alkylthioporphyrazines / S.Ristori;G.Ricciardi;D.Pietrangeli;A. Rosa;A.Feis. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - STAMPA. - 113:(2009), pp. 8537-8540. [10.1021/jp902191f]
Hydrotropic solubilization of gold nanoparticles functionalized with proto-alkylthioporphyrazines
RISTORI, SANDRA;FEIS, ALESSANDRO
2009
Abstract
ABSTRACT Hydrotropic anchoring of a prototype porphyrazine bearing eight ethylthio chains as peripheral substituents was shown to take place on gold nanoparticles (GNPs) by UV−vis, dynamic light scattering (DLS), Raman, resonance Raman (RR), and surface enhanced resonance Raman spectroscopy (SERRS) experiments. Density functional theory (DFT) calculations were used as a valuable help to make the hypothesis that ligation to the gold surface occurred through the concurrent contribution of the peripheral sulfur atoms and the π system of the macrocycle. The so functionalized GNPs proved to be stable in water solution for long time, thus providing a suitable chemical and structural basis to build up hierarchical structures with possible applications in technological and biomedical fields.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.