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Víllora Cano, Gloria

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Víllora Cano, Gloria
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Universidad de Murcia. Departamento de Ingeniería Química
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Author: Collado-González, Mar × End date: 2018 ×

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    Assessing chemical toxicity of ionic liquids on Vibrio fischeri: Correlation with structure and composition
    (Pergamon – Elsevier Science Ltd, 2016-04-11) Hidalgo, Juana M; García Montalbán, Mercedes; Salinas Hidalgo, María Dolores; Collado-González, Mar; Díaz Baños, F. Guillermo; Víllora Cano, Gloria; Biología Celular e Histología
    One of the most important properties of the ionic liquids (ILs) is their non-volatility. However, they are wide soluble in water. For this reason, they can be released to aquatic ecosystems and to contribute to water pollution. Nevertheless, toxicological data related to ionic liquids is scarce in literature because of the great number of possible ionic liquids synthesized. The present work reports the toxicity of twenty-nine imidazolium-, pyridinium- and ammonium-based ionic liquids towards the luminescent bacteria Vibrio fischeri. Some of the effects analyzed on the toxicity have been the type of anion, the length of the alkyl chain of the cation, the cation core and the presence of a functionalized side chain in the cation. These results have showed that the main influence on the toxicity of the ILs is the alkyl chain length. A Quantitative Structure-Activity Relationships (QSAR) method has been used to validate our results obtaining a very good agreement.
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    Aggregation behaviour of gold nanoparticles in presence of chitosan
    (Springer, 2015-06-13) Fernández Espín, Vanesa ; Pamies, Ramón ; García de la Torre, José; García Montalbán, Mercedes; collado; Collado-González, Mar; Hernández Cifre, José Ginés; Díaz Baños, F. Guillermo; Víllora Cano, Gloria; Ingeniería Química
    Chitosan (CS) is a biocompatible polysaccharide with positive charge that is widely used as a coating agent for negatively charged nanoparticles. However, the types of structures that emerge by combining CS and anoparticles as well as their behaviour are still poorly understood. In this work, we characterize the nanocomposites formed by gold nanoparticles (AuNPs) and CS and study the influence of CS in the expected aggregation process that should experience those nanoparticles under the favourable conditions of low pH and high ionic strength. Thus, at the working CS concentration, we observe the existence of CS structures that quickly trap the AuNPs and avoid the formation of nanoparticle aggregates in environmental conditions that, otherwise, would lead to such an aggregation.
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