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Phthalocyanine macrocycle as stabilizer for gold and silver nanoparticles

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Abstract

A one-step process was used for the preparation of gold and silver nanoparticles stabilized by an aminophthalocyanine macrocycle. The resultant nanoparticles were characterized by absorption spectra, infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The nanoparticles were found to possess relatively narrow size distribution. The gold nanoparticles have an average diameter of ~2 nm, while silver particles have 4–5 nm. Preliminary studies on fluorescence and surface enhanced Raman spectroscopy were carried out using these nanoparticles. Fluorescence studies indicate that gold nanoparticles do not quench the fluorescence, while silver nanoparticles do. The stabilized nanoparticles showed enhancement of the Raman signals, thus revealing that they are good substrates for surface enhanced Raman scattering studies.

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Acknowledgement

The authors acknowledge DST, CSIR, New Delhi, for financial assistance. K S Lokesh thanks the CSIR, New Delhi, for a Research Associateship. The authors thank Prof. B.N. Achar, University of Mysore, India for a gift sample of cobalttetrasulfo phthalocyanine.

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  1. Koodlur Sannegowda Lokesh

    Present address: Department de Chimie Moleculaire, Universite Joseph Fourier, UMR CNRS-5250, 38041, Grenoble cedex 09, France

Authors and Affiliations

  1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560 012, India

    Koodlur Sannegowda Lokesh, Venkata Narayanan & Srinivasan Sampath

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  1. Koodlur Sannegowda Lokesh
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  2. Venkata Narayanan
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  3. Srinivasan Sampath
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Correspondence to Koodlur Sannegowda Lokesh.

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Lokesh, K.S., Narayanan, V. & Sampath, S. Phthalocyanine macrocycle as stabilizer for gold and silver nanoparticles. Microchim Acta 167, 97 (2009). https://doi.org/10.1007/s00604-009-0226-3

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