Person:
García Cervilla, Raúl

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First Name
Raúl
Last Name
García Cervilla
URI
https://hdl.handle.net/20.500.14352/86227
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
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2013 - 20193
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End date: 2019 × Start date: 2013 ×

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Now showing 1 - 3 of 3
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    Modified SWCNTs with Amphoteric Redox and Solubilizing Properties
    (Chemistry – A European Journal, 2014) Rodríguez Pérez, Laura; García Cervilla, Raúl; Herranz Astudillo, María Ángeles; Martín León, Nazario
    A complementary double‐covalent functionalization of single‐wall carbon nanotubes (SWCNTs) that involves both solubilizing ionic liquids and electroactive moieties is reported. Our strategy is a simple and efficient methodology based on the stepwise functionalization of the nanotube surface with two different organic moieties. In a first instance, oxidized SWCNTs are amidated with ionic liquid precursors, and further treated with butyl bromide to afford SWCNTs functionalized with 1‐butylimidazolium bromide. This approach allows tuneable polarity induced by anion exchange, which has an effect on the relative solubility of the modified SWCNTs in water. Subsequently, a 1,3‐dipolar cycloaddition reaction was performed to introduce the electron‐acceptor 11,11,12,12‐tetracyano‐9,10‐anthra‐quinodimethane (TCAQ) unit on the SWCNTs. Furthermore, to evaluate the influence of the functional group position, the TCAQ electroactive molecule was anchored through an esterification reaction onto previously oxidized SWCNTs, followed by the Tour reaction to introduce the ionic liquid functions. IR and Raman spectroscopies, thermogravimetric analysis (TGA), UV/Vis/NIR spectroscopy, transmission electron microscopy (TEM), and X‐ray photoelectron spectroscopy (XPS) were employed and clearly confirmed the double‐covalent functionalization of the SWCNTs.
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    Partitioning of chlorinated organic compounds from dense non-aqueous phase liquids and contaminated soils from lindane production wastes to the aqueous phase
    (Chemosphere, 2019) Lorenzo Fernández, David; García Cervilla, Raúl; Santos López, Aurora; Romero Salvador, Arturo
    Hexachlorocyclohexane (HCH) and mainly the g-HCH isomer, namely lindane, were extensively produced and used as pesticides. Huge amounts of wastes, solids and liquids, were disposed of in the surroundings of the production sites. The liquid residuum was a complex mixture of chlorinated organic compounds, COCs, from chlorobenzene to heptachlorocyclohexane. This Dense Non-Aqueous Phase Liquid, DNAPL, migrated by density through the subsurface to greater depths, being trapped or adsorbed into the soil in this movement posing a significant risk to the groundwater. Knowledge of the partitioning in water of COCs in DNAPL is a key issue to determine its fate in the environment. However, there are no data in literature for the partitioning and/or solubility of many of the COCs in this DNAPL, such as pentachlorocyclohexene, hexachlorocyclohexene and heptachlorocyclohexane despite them constitute about 13e30% of the mole fraction of the DNAPLs. In this work, the partitioning to water of COCs in free and those adsorbed onto soil has been studied. In addition, measured and predicted aqueous concentrations of each COC in the DNAPL mixture have been compared. To do this, the solubility of a compound that is a solid crystal when pure at P ¼ 298 K and P ¼ 1 atm has been evaluated considering the approach of sub-cooled liquid state of solid organochlorines. Samples were obtained at Sabinanigo land ~ fills and soils used had several grain sizes. Transformation in alkaline media of COCs had a positive environmental impact
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    Stable Electron Donor–Acceptor Nanohybrids by Interfacing n‐Type TCAQ with p‐Type Single‐Walled Carbon Nanotubes
    (Angewandte Chemie - International Edition, 2013) Romero‐Nieto, Carlos; García Cervilla, Raúl; Herranz Astudillo, María Ángeles; Rodríguez Pérez, Laura; Sánchez‐Navarro, Macarena; Rojo, Javier; Martín León, Nazario; Guldi, Dirk
    Tuning the electronics of nanotubes: Electron-accepting 11,11,12,12-tetracyano-9,10-anthraquinodimethane (TCAQ) nanotweezers endowed with a carboxylic acid-containing dendrimeric moiety form exceptionally stable n-/p-type dispersions with single-walled carbon nanotubes (SWCNTs) in water. Upon photoexcitation, the nanohybrids undergo a less common electron transfer from the SWCNTs to the TCAQ nanotweezers.