SERS spectrum of imazalil. Experimental and quantum-chemical vibrational analysis

Authors
Díaz Mirón, Gonzalo; Sánchez, María A.; Chemes, Doly María; Alvarez, Rosa Maria Susana
Publication Year
2018
Language
English
Format
article
Status
Published version
Description
Imazalil [1-[2-(2,4-dichlorophenyl)-2-(2-propenyloxyl-ethyl]-1 H imidazole] is a systemic fungicide that is toxic to a number of plant pathogens, particularly species of Penicillum. Its activity is based on the inhibition of mold sporulation on fruit skin, which makes it one of the most commonly used fungicide in post-harvest citrus treatments for fruit preservation during storage, shipping, and marketing. Due to its wide application, the presence of imazalil needs to be monitored to avoid the excessive and/or improper use. This work reports a complete analysis of the Fourier-transform infrared spectroscopy and Raman spectra of imazalil as a pure compound as well as in the commercial product for agricultural use; the band assignment relays in the vibrational predictions acquired by quantum-chemical calculations (B3LYP/6?311 + g(2df, p)) for the imazalil molecule. An analytical application of surface-enhanced Raman spectroscopy (SERS) is also presented here. It is done so by using a novel, low-cost, and sensitive SERS-active substrate built with silver nanoparticles supported on a Si/ZnO nanowires platform to detect traces of imazalil in aqueous solutions. Comparison between the Raman and SERS spectra allowed the characterization of the interaction between the pesticide and the silver nanoparticle surface.
Fil: Díaz Mirón, Gonzalo. Universidad Nacional de Tucumán; Argentina
Fil: Sánchez, María A.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Chemes, Doly María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Tucumán. Unidad de Administración Territorial; Argentina
Fil: Alvarez, Rosa Maria Susana. Universidad Nacional de Tucumán; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
Subject
IMAZALIL
PESTICIDE
RAMAN
SERS
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/81329