Núria Crivillers

Institut de Ciència de Materials de Barcelona

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Marta Mas‐Torrent

Institut de Ciència de Materials de Barcelona

Concepció Rovira

Institut de Ciència de Materials de Barcelona

Jaume Veciana

Institut de Ciència de Materials de Barcelona

J. Alejandro de Sousa

Institut de Ciència de Materials de Barcelona

Paolo Samorı́

Centre National de la Recherche Scientifique

Stefan T. Bromley

Universitat de Barcelona

José Muñoz

Universitat Autònoma de Barcelona

Marcel Mayor

University of Basel

N.S. Oxtoby

AkzoNobel (United Kingdom)

Klaus Wurst

Universität Innsbruck

Cooperative Institutions

Institut de Ciència de Materials de Barcelona

Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine

Centre National de la Recherche Scientifique

Universitat Autònoma de Barcelona

Université de Strasbourg

Consejo Superior de Investigaciones Científicas

University of Mons

National Research Council

University of Bologna

Institute of Organic Synthesis and Photoreactivity

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An Electrically Driven and Readable Molecular Monolayer Switch Based on a Solid Electrolyte

Angewandte Chemie (2015)

Elena Marchante Núria Crivillers Moritz Buhl Jaume Veciana Marta Mas‐Torrent

Abstract The potential application of molecular switches as active elements in information storage has been demonstrated through numerous works. Importantly, such switching capabilities have also been reported for self‐assembled monolayers (SAMs). SAMs of electroactive molecules have recently been exploited as electrochemical switches. Typically, the state of these switches could be read out through their optical and/or magnetic response. These output reading processes are difficult to integrate into devices, and furthermore, there is a need to use liquid environments for switching the redox‐active molecular systems. In this work, both of these challenges were overcome by using an ionic gel as the electrolyte medium, which led to an unprecedented solid‐state device based on a single molecular layer. Moreover, electrochemical impedance has been successfully exploited as the output of the system.

Molecular switch

Self-assembled monolayer

Molecular Electronics

10.1002/ange.201508449

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Citations (13)

Selective Discrimination of Toxic Polycyclic Aromatic Hydrocarbons in Water by Targeting π-Stacking Interactions

ACS Applied Materials & Interfaces (2020)

José Muñoz Ángel Campos‐Lendínez Núria Crivillers Marta Mas‐Torrent

The development of highly sensitive and selective devices for rapid screening of polycyclic aromatic hydrocarbons (PAHs) in water is nowadays a crucial challenge owing to their alarming abundance in the environment and adverse health effects. Herein, inspired by the unique π-stacking interactions taking place between identical small aromatic molecules, a novel, generic, and straightforward methodology to electrochemically determine and discriminate such pollutants is described. Such a method is focused on covalently anchoring different PAHs on an indium tin oxide electrode surface by means of self-assembled monolayers. The surface-anchored PAHs act as recognition units to selectivity interact with a specific PAH target of the same nature. By tailoring the recognition platform with four different model PAH molecules (naphthalene, anthracene, pyrene, and fluoranthene) and carrying out an electronic tongue approximation, the selective discrimination and quantification of the selected PAHs in aqueous samples at ultralow concentrations were achieved impedimetrically, which were also validated using a certified reference PAH mixture.

Fluoranthene

Molecular Recognition

Polycyclic aromatic hydrocarbon

Indium tin oxide

10.1021/acsami.0c05557

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Citations (11)

Organic radicals as promising building blocks for electronics: expanding their applicability through the alkyne-based chemistry

Núria Crivillers

Alkyne

Source

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Citations (0)

Electrocatalytic oxidative Z/E isomerization of a stilbene favoured by the presence of an electroactive persistent radical

Chemical Communications (2020)

Paula Mayorga Burrezo Christian Sporer J. Alejandro de Sousa Nicola Capra Klaus Wurst

A push-pull-functionalized stilbene has been prepared, with an electroactive perchlorotriphenylmethyl (PTM˙) radical and dimethylamine units as electron-withdrawing and -donating moieties, respectively, showing an electrocatalytic redox-induced Z→E isomerization where the open-shell nature of PTM˙ plays a key role in the isomerization ocurrance.

10.1039/d0cc04973e

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Citations (1)

Electrochemically driven host–guest interactions on patterned donor/acceptor self-assembled monolayers

Chemical Communications (2018)

Maria Serena Maglione Javier Casado‐Montenegro Eva‐Corinna Fritz Núria Crivillers Bart Jan Ravoo

Here, on ITO//Au patterned substrates SAMs of ferrocene (Fc) on the Au regions and of anthraquinone (AQ) on the ITO areas are prepared, exhibiting three stable redox states. Furthermore, by selectively oxidizing or reducing the Fc or AQ units, respectively, the surface properties are locally modified. As a proof-of-concept, such a confinement of the properties is exploited to locally form host-guest complexes with β-cyclodextrin on specific surface regions depending on the applied voltage.

Acceptor

Self-assembled monolayer

10.1039/c8cc00494c

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Citations (5)

Electrochemical and magnetic properties of a surface-grafted novel endohedral metallofullerene derivative

Chemical Communications (2013)

Núria Crivillers Yuta Takano Yuya Matsumoto Javier Casado‐Montenegro Marta Mas‐Torrent

A novel endohedral metallofullerene (EMF) has been designed and synthesised for its grafting on gold. The functionalization of the substrate resulted in a multifunctional surface displaying the properties of the EMF in solution.

Metallofullerene

Surface Modification

Derivative (finance)

10.1039/c3cc43578d

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Citations (10)

Self‐Assembled Monolayers of a Multifunctional Organic Radical

Angewandte Chemie International Edition (2007)

Núria Crivillers Marta Mas‐Torrent Sandrine Perruchas Nans Roques J. Vidal-Gancedo

A radical switch: Covalent and noncovalent interactions have been used to functionalize silicon oxide surfaces with polychlorotriphenylmethyl radicals, which are electroactive and can be reversibly reduced or oxidized to nonmagnetic and nonfluorescent species. Thus, the self-assembled monolayers behave as chemical switches that combine electronic absorption, fluorescence emission (see picture), and magnetic outputs. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z603599_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Non-covalent interactions

10.1002/anie.200603599

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Citations (57)

CCDC 626999: Experimental Crystal Structure Determination

The Cambridge Structural Database (2008)

Dulce Belo M.J. Figueira João P. M. Nunes I.C. Santos Manuel Almeida

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccp1fsx

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Photoinduced work function changes by isomerization of a densely packed azobenzene-based SAM on Au: a joint experimental and theoretical study

Physical Chemistry Chemical Physics (2011)

Núria Crivillers Andrea Liscio Francesco Di Stasio Colin Van Dyck Silvio Osella

Responsive monolayers are key building blocks for future applications in organic and molecular electronics in particular because they hold potential for tuning the physico-chemical properties of interfaces, including their energetics. Here we study a photochromic SAM based on a conjugated azobenzene derivative and its influence on the gold work function (Φ(Au)) when chemisorbed on its surface. In particular we show that the Φ(Au) can be modulated with external stimuli by controlling the azobenzene trans/cis isomerization process. This phenomenon is characterized experimentally by four different techniques, kelvin probe, kelvin probe force microscopy, electroabsorption spectroscopy and ultraviolet photoelectron spectroscopy. The use of different techniques implies exposing the SAM to different measurement conditions and different preparation methods, which, remarkably, do not alter the observed work function change (Φ(trans)-Φ(cis)). Theoretical calculations provided a complementary insight crucial to attain a deeper knowledge on the origin of the work function photo-modulation.

Azobenzene

Self-assembled monolayer

Ultraviolet photoelectron spectroscopy

10.1039/c1cp20851a

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Citations (65)

Negative differential resistance (NDR) in similar molecules with distinct redox behaviour

Chemical Communications (2011)

Núria Crivillers Markos Paradinas Marta Mas‐Torrent Stefan T. Bromley Concepció Rovira

The transport characterization of self-assembled monolayers (SAMs) based on the closed and open-shell forms of a fully conjugated polychlorotrimethylphenyl (PTM) derivative hybridized with the gold substrate reveals that both systems exhibit negative differential resistance (NDR) in their I–V curves which was attributed to similar resonant tunnelling with unoccupied molecular orbitals. This work demonstrates that distinct transport mechanisms can dominate depending on the bias-voltage applied and shows that NDR processes are not influenced here by the redox character of the molecules.

10.1039/c1cc10677e

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Citations (37)