Search results for "Ionogel"

“Sweet” ionic liquid gels: materials for sweetening of fuels

2018

The search for new materials to be used in desulfurisation (sweetening) of fuels is one of the main topics of current research. In this paper, we explored the possibility of using supramolecular gels obtained from the gelation of ionic liquid binary mixtures. Indeed, some ionic liquids are generally known as efficient extraction phases for desulfurisation of fuels. In rare cases, one of their main drawbacks is their partial solubility in the fuel, leading to contamination. Then, their immobilisation due to the formation of a gelatinous network may be a challenge. Ionic liquid gels were obtained by mixing certain [NTf2]−-based ionic liquids (solvents) with the ones of gluconate-based ionic l…

Ionic Liquid Gels: Supramolecular Reaction Media for the Alcoholysis of Anhydrides.

2019

The search of new enantioselective catalysts, able to promote synthetically useful organic reactions with high levels of asymmetric induction, should be associated with the attention to the suitable reaction medium able to achieve the best efficiency in chemical processes. We have investigated the enantioselective desymmetrization of cyclic meso-anhydrides in nonconventional reaction media such as ionic liquids and supramolecular gels. With this aim, we examined several variables in the reacting system: the nature of ionic liquid used as the reaction medium, the gelation solvent, the structure of the anhydrides, the structure of alcohols, the chiral catalysts, and the reaction conditions, i…

Diimidazolium-based supramolecular ionogels for dye removal from wastewaters

STRATEGIE PER IL MIGLIORAMENTO DELLA PRODUZIONE E LO SVILUPPO DI MOLECOLE AD ATTIVITÀ ANTIBIOTICA DI ORIGINE NATURALE O DI SINTESI CHIMICA

The emergence of multi-drug resistant (MDR) bacterial strains is an urgent problem derived from the widespread and uncontrolled use of antibiotics. Therefore, new arrays of lead compounds exerting antimicrobial activity are necessary to contrast the spreading of MDR pathogens. Between 1980 and 2003, the interest in scientific research programs aimed to the new drug discovery by large pharmaceutical companies progressively decreased due to increasing costs in the respect of i) the low discovery rate of new leads, ii) the small amounts of product recovery needing process optimization and, finally, iii) regulatory obstacles associated with long-lasting pre-clinical and clinical trials for ther…

Anion and ionic liquid effects on ionogel phases formation

Geminal organic salts have been recently introduced as the third generation of ionic liquids.1 Like their monocationic precursors they generally show high thermal stability and low corrosiveness, as well as high polarity and structural order degree.2 All these features make them good candidates to be used in the formation of conductive gel phases, that afterwards may find application as organized reaction media or in the preparation of dye sensitized solar cells.3 In this context, we have recently synthesized some task specific geminal organic salts and investigated their behaviour as gelators. The obtained salts were able to gel ionic liquid solutions. In order to have information about th…

The importance of supramolecular reaction media in catalysis

Ionogels: Multifaced Materials

Diimidazolium organic salts and supramolecular gels exerting antimicrobial activity

Biopolymer-based Ionic Liquid gels: sustainable antioxidant and antimicrobial materials

Walking through Soft Materials to Join Supramolecular Gels: An Overview about the Properties and Applications

The class of soft materials includes a large variety of species arising from self-assembly processes and held by non-covalent interactions. This confers peculiar features, allowing applications in very different fields.1 Among soft materials, supramolecular gel phases have aroused a surge of interest.2 These materials combine properties of liquid phase with the ones of a semi-solid network and the large number of gelator/solvent combinations can offer answer to issues of different nature.3 This lecture will show on overview about the obtainment and characterization of gel phases, in the attempt to understand the relationship working between gelator and solvent nature and gel phase propertie…