Guerrini, L and Aliaga, A. E. and Carcamo, J and Gomez-Jeria, J. S. and Sanchez-Cortes, S and Campos-Vallette, M. M. and Garcia-Ramos, J. V. (2008) Functionalization of Ag nanoparticles with the bis-acridinium lucigenin as a chemical assembler in the detection of persistent organic pollutants by surface-enhanced Raman scattering. ANALYTICA CHIMICA ACTA, 624 (2). pp. 286-293.
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Official URL: http://dx.doi.org/10.1016/j.aca.2008.06.038
Organochlorine pesticide endosulfan has been detected for the first time by using surface-enhanced Raman scattering (SERS) at trace concentrations. The bis-acridinium dication lucigenine was successfully used as a molecular assembler in the functionalization of metal nanoparticles to facilitate the approach of the pesticide to the metal surface. From the SERS spectra valuable information about the interaction mechanism between the pesticide and lucigenin can be deduced. In fact, endosulfan undergoes an isomerization upon adsorption onto the metal, while the viologen undergoes a rotation of the acridinium planes to better accommodate the pesticide molecule. An interaction between the N atom of the central acridinium ring and the pesticide Cl-C=C-Cl fragment is verified through a charge-transfer complex. The present study affords important information which can be applied to the design of chemical sensor systems of persistent organic pollutants based on the optical detection on functionalized metal nanoparticle. (c) 2008 Elsevier B.V. All rights reserved.
|Uncontrolled Keywords:||metal functionalization; viologen; lucigenin; molecular recognition; surface-enhanced Raman scattering; nanosensors; organochlorine pesticides|
|Subjects:||Physical Science > Nano objects|
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanochemistry
|Deposited By:||Anuj Seth|
|Deposited On:||16 Dec 2008 13:55|
|Last Modified:||18 Feb 2009 17:48|
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