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Journal of Nanomaterials
Volume 2015, Article ID 101694, 7 pages
Research Article

Schiff Base Ligand Coated Gold Nanoparticles for the Chemical Sensing of Fe(III) Ions

1Center of Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia
2Center of Research Excellence in Renewable Energy, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia
3Surface Properties Research Team, Korea Basic Science Institute, Busan Center, Busan 609-735, Republic of Korea

Received 13 May 2015; Accepted 13 July 2015

Academic Editor: Subrata Kundu

Copyright © 2015 Abiola Azeez Jimoh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


New Schiff base-coated gold nanoparticles (AuNPs) of type AuNP@L (where L: thiolated Schiff base ligand) have been synthesized and characterized using various spectroscopic techniques. The AuNPs and AuNP@L were imaged by transmission electron microscopy (TEM) and were confirmed to be well-dispersed, uniformly distributed, spherical nanoparticles with an average diameter of 8–10 nm. Their potential applications for chemosensing were investigated in UV-Vis and fluorescence spectroscopic studies. The AuNP@L exhibited selectivity for Fe3+ in an ethanol/water mixture (ratio 9 : 1 v/v). The absorption and emission spectral studies revealed a 1 : 1 binding mode for Fe3+, with binding constants of and  M−1, respectively.