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Reference type: Journal
Authors: Gültekin A, Diltemiz SE, Ersöz A, Sariözlü NY, Denizli A, Say RI
Article Title: Gold-silver nanoclusters having dipicolinic acid imprinted nanoshell for Bacillus cereus spores recognition.
Publication date: 2009
Journal: Talanta
Volume: 78
Issue: (4-5)
Page numbers: 1332-1338.
DOI: 10.1016/j.talanta.2009.02.007
Alternative URL: http://www.sciencedirect.com/science/article/B6THP-4VKXBXF-3/2/cbfe072aab68e793df9d20c04c67defb

Abstract: Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP nanoclusters have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamidocysteine (MAC) attached to gold-silver nanoclusters, reminiscent of a self-assembled monolayer and have reconstructed surface shell by synthetic host polymers based on molecular imprinting method for recognition. In this method, methacryloyl iminodiacetic acid-chrome (MAIDA-Cr(III)) has been used as a new metal-chelating monomer via metal coordination-chelation interactions and dipicolinic acid (DPA) which is a main participant of Bacillus spores has been used as a template. Nanoshell sensors with templates give a cavity that is selective for DPA. The DPA can simultaneously chelate to Cr(III) metal ion and fit into the shape-selective cavity. Thus, the interaction between Cr(III) ion and free coordination spheres has an effect on the binding ability of the gold-silver nanoclusters nanosensor. The binding affinity of the DPA imprinted nanoclusters has been investigated by using the Langmuir and Scatchard methods and determined affinity constants (Kaffinity) were found as 18 x 10^6 mol L-1 and 9 x 10^6 mol L-1, respectively
Template and target information: dipicolinic acid, DPA, Bacillus spores, Bacillus cereus spores
Author keywords: Gold-silver nanoclusters sensor, Molecularly imprinted polymers, dipicolinic acid, Bacillus spores recognition, Photoluminesence

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