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Phthalocyanine-Gold Nanoparticle Hybrids: Modulating Quenching with a Silica Matrix Shell
Herme G Baldovi1, Vicente M Blas-Ferrando2, Javier Ortiz2
1Instituto Universitario de Tecnologia Química, CSIC-UPV, Avd. de los Naranjos, 46022, Valencia, Spain).
Abstract:
An asymmetrically substituted zinc phthalocyanine (ZnPc) with a terminal dithiolane group is anchored to Au nanoparticles (NPs) directly or through an interposed silica matrix. Transient absorption spectroscopy shows that the quenching of the ZnPc excited state by AuNPs occurs through a photoinduced electron transfer, the efficiency of which is modulated by the presence of the insulating silica matrix.
