Tuneable and low cost molecular electronics

Organic Polyradicals as Redox Mediators: Effect of Intramolecular Radical Interactions on Their Efficiency

Written by icmab on 16 February 2021.

Autores: Elena Badetti*, Vega Lloveras, Emanuele Amadio, Rosalia Di Lorenzo, Mara Olivares-Marín, Alvaro Y. Tesio, Songbai Zhang, Fangfang Pan, Kari Rissanen, Jaume Veciana, Dino Tonti*, Jose Vidal-Gancedo*, Cristiano Zonta, and Giulia Licini*

Citation:

ACS Appl. Mater. Interfaces 2020, 12, 41, 45968–45975

Publication Date:September 15, 2020

DOI:https://pubs.acs.org/doi/10.1021/acsami.0c09386

PlumX: Organic Polyradicals as Redox Mediators: Effect of Intramolecular Radical Interactions on Their Efficiency

The spin–spin interactions between unpaired electrons in organic (poly)radicals, especially nitroxides, are largely investigated and are of crucial importance for their applications in areas such as organic magnetism, molecular charge transfer, or multiple spin labeling in structural biology. Recently, 2,2,6,6-tetramethylpiperidinyloxyl and polymers functionalized with nitroxides have been described as successful redox mediators in several electrochemical applications; however, the study of spin–spin interaction effect in such an area is absent.

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Metallacarboranes as Photoredox Catalysts in Water

Written by icmab on 02 February 2021.

Autores: Isabel Guerrero, Dr. Zsolt Kelemen, Prof. Dr. Clara Viñas, Dr. Isabel Romero, Prof. Dr. Francesc Teixidor

Citation:

Chem. Eur. J. 2020, 26, 5027
DOI: https://doi.org/10.1002/chem.201905395

PlumX: Metallacarboranes as Photoredox Catalysts in Water

Metallacarboranes with the shape of the Greek letter θ, such as [Co(C₂B₉H₁₁)₂]⁻, were tested, for the first time, as efficient photoredox catalysts in the oxidation of aromatic and aliphatic alcohols in water. Their efficiency is linked to their high solubility in water, their high oxidizing power (Co^4+/3+), and their absence of fluorescence on excitation, among others.

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Resistive Switching Observation in a Gallium-Based Liquid Metal/Graphene Junction

Written by icmab on 22 January 2021.

Autores: Diego Gutiérrez, Jesús Alejandro de Sousa, Marta Mas-Torrent, and Núria Crivillers*

Citation:

ACS Appl. Electron. Mater. 2020, 2, 10, 3093–3099

Publication Date:September 13, 2020

https://doi.org/10.1021/acsaelm.0c00296

PlumX: Resistive Switching Observation in a Gallium-Based Liquid Metal/Graphene Junction

Resistive switching effect is observed for a gallium–indium/gallium oxide/graphene junction. The use of a gallium-based liquid metal (LM) alloy, in this case, the eutectic gallium–indium with its native gallium oxide skin, directly provides the metal top contact and the oxide layer needed to fabricate a memory.

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Stability of radical-functionalized gold surfaces by self-assembly and on-surface chemistry

Written by icmab on 12 January 2021.

Autores: Tobias Junghoefer, Ewa Malgorzata Nowik-Boltyk, J. Alejandro de Sousa, Erika Giangrisostomi, Ruslan Ovsyannikov, Thomas Chassé, Jaume Veciana, Marta Mas-Torrent, Concepció Rovira, Núria Crivillers and Maria Benedetta Casu *

Citation: Chem. Sci., 2020,11, 9162-9172
DOI: https://doi.org/10.1039/D0SC03399E

PlumX: Stability of radical-functionalized gold surfaces by self-assembly and on-surface chemistry

We have investigated the radical functionalization of gold surfaces with a derivative of the perchlorotriphenylmethyl (PTM) radical using two methods: by chemisorption from the radical solution and by on-surface chemical derivation from a precursor.

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

Written by icmab on 01 January 2021.

Autores: Paula Mayorga-Burrezo, * Christian Sporer, J. Alejandro de Sousa, Nicola Capra, Klaus Wurst, Núria Crivillers, Jaume Veciana and Concepció Rovira *.

Citation: Chem. Commun., 2020, Advance Article
DOI: https://doi.org/10.1039/D0CC04973E

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

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.

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Nanoscale Mapping of the Conductivity and Interfacial Capacitance of an Electrolyte‐Gated Organic Field‐Effect Transistor under Operation

Written by icmab on 25 December 2020.

Título : Nanoscale Mapping of the Conductivity and Interfacial Capacitance of an Electrolyte‐Gated Organic Field‐Effect Transistor under Operation

Autores: Adrica Kyndiah, Martí Checa, Francesca Leonardi, Ruben Millan‐Solsona, Martina Di Muzio, Shubham Tanwar, Laura Fumagalli, Marta Mas‐Torrent, Gabriel Gomila

Citation: Adv. Funct. Mater. 2020, 2008032.
DOI: https://doi.org/10.1002/adfm.202008032

PlumX: Nanoscale Mapping of the Conductivity and Interfacial Capacitance of an Electrolyte‐Gated Organic Field‐Effect Transistor under Operation

Probing nanoscale electrical properties of organic semiconducting materials at the interface with an electrolyte solution under externally applied voltages is key in the field of organic bioelectronics. It is demonstrated that the conductivity and interfacial capacitance of the active channel of an electrolyte‐gated organic field‐effect transistor (EGOFET) under operation can be probed at the nanoscale using scanning dielectric microscopy in force detection mode in liquid environment.

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Label-free immunodetection of α-synuclein by using a microfluidics coplanar electrolyte-gated organic field-effect transistor

Written by icmab on 18 December 2020.

Título : Label-free immunodetection of α-synuclein by using a microfluidics coplanar electrolyte-gated organic field-effect transistor

Autores: Simona Ricci, Stefano Casalini, Vitaliy Parkula, Meenu Selvaraj, Gulseren Deniz Saygin, Pierpaolo Greco, Fabio Biscarini, Marta Mas-Torrent

Citation: Biosensors and Bioelectronics Volume 167, 1 November 2020, 112433.
DOI: https://doi.org/10.1016/j.bios.2020.112433

PlumX: Label-free immunodetection of α-synuclein by using a microfluidics coplanar electrolyte-gated organic field-effect transistor

The aggregation of α-synuclein is a critical event in the pathogenesis of neurological diseases, such as Parkinson or Alzheimer. Here, we present a label-free sensor based on an Electrolyte-Gated Organic Field-Effect Transistor (EGOFET) integrated with microfluidics that allows for the detection of amounts of α-synuclein in the range from 0.25 pM to 25 nM. The lower limit of detection (LOD) measures the potential of our integrated device as a tool for prognostics and diagnostics.

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Enhancing Long‐Term Device Stability Using Thin Film Blends of Small Molecule Semiconductors and Insulating Polymers to Trap Surface‐Induced Polymorphs

Written by icmab on 04 December 2020.

Autores: Tommaso Salzillo, Antonio Campos, Adara Babuji, Raul Santiago, Stefan T. Bromley, Carmen Ocal, Esther Barrena, Rémy Jouclas, Christian Ruzie, Guillaume Schweicher, Yves H. Geerts, Marta Mas‐Torrent.

Citation: Adv. Funct. Mater.2020, 2006115.
https://doi.org/10.1002/adfm.202006115

PlumX: Enhancing Long‐Term Device Stability Using Thin Film Blends of Small Molecule Semiconductors and Insulating Polymers to Trap Surface‐Induced Polymorphs

The lack of long‐term stability in thin films of organic semiconductors can often be caused by the low structural stability of metastable phases that are frequently formed upon deposition on a substrate surface. Here, thin films of 2,7‐dioctyloxy[1]benzothieno[3,2‐b]benzothiophene (C₈O‐BTBT‐OC₈) and blends of this material with polystyrene by solution shearing are fabricated.

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Conservation of structural arrangements and 3:1 stoichiometry in a series of crystalline conductors of TMTTF, TMTSF, BEDT-TTF, and chiral DM-EDT-TTF with the oxo-bis[pentafluorotantalate(V)] dianion

Written by icmab on 24 November 2020.

Autores: Nabil Mroweh, Cécile Mézière, Magali Allain, Pascale Auban-Senzier, Enric Canadell * and Narcis Avarvari *.

Citation: Chem. Sci., 2020, 11, 10078-10091.
DOI: 10.1039/D0SC03665J

PlumX: Conservation of structural arrangements and 3[thin space (1/6-em)]:[thin space (1/6-em)]1 stoichiometry in a series of crystalline conductors of TMTTF, TMTSF, BEDT-TTF, and chiral DM-EDT-TTF with the oxo-bis[pentafluorotantalate(V)] dianion

The occurrence of isostructural conducting radical cation salts of diversely substituted tetrathiafulvalene (TTF) precursors with the same anion is most often limited to very similar derivatives such as tetramethyl-tetrathiafulvalene (TMTTF) and tetramethyl-tetraselenafulvalene (TMTSF).

Hits: 546

Neutral Organic Radical Formation by Chemisorption on Metal Surfaces

Written by icmab on 20 November 2020.

Autores: M. R. Ajayakumar, César Moreno*, Isaac Alcón, Francesc Illas, Concepció Rovira, Jaume Veciana, Stefan T. Bromley*, Aitor Mugarza, and Marta Mas-Torrent*.

Citation: J. Phys. Chem. Lett. 2020, 11, 10, 3897–3904.
DOI: https://doi.org/10.1021/acs.jpclett.0c00269

PlumX: Neutral Organic Radical Formation by Chemisorption on Metal Surfaces

Organic radical monolayers (r-MLs) bonded to metal surfaces are potential materials for the development of molecular (spin)electronics. Typically, stable radicals bearing surface anchoring groups are used to generate r-MLs.

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Surface specificity and mechanistic pathway of de-fluorination of C60F48 on coinage metals

Written by icmab on 17 November 2020.

Título : Surface specificity and mechanistic pathway of de-fluorination of C₆₀F₄₈ on coinage metals

Autores: Rogger Palacios-Rivera, David C. Malaspina, Nir Tessler, Olga Solomeshch, Jordi Faraudo,* Esther Barrena* and Carmen Ocal.

Citation: Nanoscale Adv., 2020, Advance Article.
https://doi.org/10.1039/D0NA00513D

PlumX: Surface specificity and mechanistic pathway of de-fluorination of C60F48 on coinage metals

We provide experimental and theoretical understanding on fundamental processes taking place at room temperature when a fluorinated fullerene dopant gets close to a metal surface. By employing scanning tunneling microscopy and photoelectron spectroscopies, we demonstrate that the on-surface integrity of C₆₀F₄₈ depends on the interaction with the particular metal it approaches.

Hits: 546

Selection of the two enantiotropic polymorphs of diF-TES-ADT in solution sheared thin film transistors

Written by icmab on 13 November 2020.

Autores: Tommaso Salzillo, Nieves Montes, Raphael Pfattner and Marta Mas-Torrent *

Citation: J. Mater. Chem. C, 2020, Advance Article
https://doi.org/10.1039/D0TC03222K

PlumX: Selection of the two enantiotropic polymorphs of diF-TES-ADT in solution sheared thin film transistors

We report the effect of solution shearing speed on the performances of diF-TES-ADT-based OFETs. X-ray diffraction reveals that th low-temperature phase is predominant at low shearing speed, while, upon increasing the speed, the high-tempertature phase prevails. The effect of polymorph composition on the electrical performances is reported with the best mobilities found in a mixture of the two polymorphs.

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Dibenzocycloheptatriene as end-group of Thiele and tetrabenzo-Chichibabin hydrocarbons

Written by icmab on 06 November 2020.

Autores: Vicente G Jiménez, Paula Mayorga Burrezo, Victor Blanco, Vega Lloveras, Carlos J. Gomez Garcia, Tomas Solomek, Juan Manuel Cuerva, Jaume Veciana and Araceli G. Campaña

Citation: Chem. Commun., 2020, Accepted Manuscript.
https://doi.org/10.1039/D0CC04489J

PlumX: Dibenzocycloheptatriene as end-group of Thiele and tetrabenzo-Chichibabin hydrocarbons

Thiele (Th) and tetrabenzo-Chichibabin (TBC) derivatives with terminal dibenzocycloheptatriene (DBHept) units were prepared. A clear correlation between their electronic and molecular structures was stablished. Insights into their closed- or open-shell ground states were gained, where particular contribution of the heptagonal carbocycles as end-groups was proved. Remarkably, a thermally accessible triplet diradical configuration was confirmed for the DBHept-TBC compound.

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In Search of Chiral Molecular Superconductors: κ‐[(S,S)‐DM‐BEDT‐TTF]2ClO4 Revisited

Written by icmab on 30 October 2020.

Título : In Search of Chiral Molecular Superconductors: κ‐[(S,S)‐DM‐BEDT‐TTF]₂ClO₄ Revisited

Autores: Nabil Mroweh, Cécile Mézière, Flavia Pop, Pascale Auban‐Senzier, Pere Alemany, Enric Canadell ,Narcis Avarvari

Citation: Adv. Mater.2020, 32, 2002811.
https://doi.org/10.1002/adma.202002811

PlumX: In Search of Chiral Molecular Superconductors: κ‐[(S,S)‐DM‐BEDT‐TTF]2ClO4 Revisited

The relationship between chirality and superconductivity is an intriguing question. The two enantiomeric crystalline radical cation salts κ‐[(S,S)‐DM‐BEDT‐TTF]₂ClO₄ and κ‐[(R,R)‐DM‐BEDT‐TTF]₂ClO₄, showing κ‐type arrangement of the organic layers, are investigated in search for superconducting chiral molecular materials following a 1992 report indicating the occurrence of a superconducting transition in the former compound.

While the initial interpretation is presently challenged through in‐depth temperature and pressure dependent single crystal resistivity measurements combined with band structure calculations, the two chiral conductors show metal like behavior with room temperature conductivities of 10–30 S cm⁻¹ at ambient pressure and stabilization of the metallic state down to the lowest temperatures under moderate pressures.

Hits: 522

Double Beneficial Role of Fluorinated Fullerene Dopants on Organic Thin-Film Transistors: Structural Stability and Improved Performance

Written by icmab on 25 August 2020.

The present work assesses improved carrier injection in organic field-effect transistors by contact doping and provides fundamental insight into the multiple impacts that the dopant/semiconductor interface details have on the long-term and thermal stability of devices.

Hits: 658

Reversibly switchable fluorescent molecular systems based on metallacarborane‐perylenediimide conjugates

Written by icmab on 14 August 2020.

Icosahedral metallacarboranes are θ‐shaped anionic molecules in which two icosahedra share one vertex that is a metal center. The most remarkable of these compounds is the anionic cobalt‐based metallacarborane [Co(C₂B₉H₁₁)₂]^‐, whose oxidation‐reduction processes occur via an outer sphere electron process.

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Impact of Nanomorphology on Surface Doping of Organic Semiconductors: The Pentacene–C60F48 Interface

Written by icmab on 28 July 2020.

Establishing the rather complex correlation between the structure and the charge transfer in organic–organic heterostructures is of utmost importance for organic electronics and requires spatially resolved structural, chemical, and electronic details.

Hits: 679

Morphology and mobility as tools to control and unprecedentedly enhance X-ray sensitivity in organic thin-films

Written by icmab on 12 June 2020.

Organic semiconductor materials exhibit a great potential for the realization of large-area solution-processed devices able to directly detect high-energy radiation. However, only few works investigated on the mechanism of ionizing radiation detection in this class of materials, so far.

Hits: 660

Too Persistent to Give Up: Aromaticity in Boron Clusters Survives Radical Structural Changes

Written by icmab on 09 June 2020.

o-C₂B₁₀H₁₂ isomerizes to m-C₂B₁₀H₁₂ upon heating at 400 °C. Deboronation in o-C₂B₁₀H₁₂ is a relatively easy process, whereas it is more difficult in m-C₂B₁₀H₁₂. These two experimental facts indicate that m-C₂B₁₀H₁₂ is thermodynamically more stable than o-C₂B₁₀H₁₂.

Hits: 576

Tuning the structure and flexibility of coordination polymers via solvent control of tritopic triazine conformation during crystallization

Written by Jags on 24 April 2020.

Nuria Portoles-Gil, Ana M. López-Periago, Alejandro Borras, Julio Fraile, Eduardo Solano, Oriol Vallcorba, Jose G. Planas, José A. Ayllón, Concepción Domingo. Cryst. Growth Des. 2020.
Publication Date: March 18, 2020

Hits: 630

Redox-Active PTM Radical Dendrimers as Promising Multifunctional Molecular Switches

Written by icmab on 11 February 2020.

Vega Lloveras, Flonja Liko, José L. Muñoz-Gómez, Jaume Veciana, José Vidal-Gancedo*. Chem. Mater. 2019, 31, 22, 9400-9412. Publication Date:October 31, 2019

Hits: 512

Bioelectronic Recordings of Cardiomyocytes with Accumulation Mode Electrolyte Gated Organic Field Effect Transistors

Written by icmab on 07 February 2020.

Adrica Kyndiah,Francesca Leonardi, Carolina Tarantino, TobiasCramer, Ruben Millan-Solsona, Elena Garreta, Núria Montserrat, Marta Mas-Torrent, Gabriel Gomila. Biosensors and Bioelectronics. Available online 6 November 2019, 111844.

Hits: 661

Exploiting the versatile alkyne-based chemistry for expanding the applications of a stable triphenylmethyl organic radical on surfaces

Written by icmab on 24 January 2020.

Jesús Alejandro de Sousa , Francesc Bejarano, Diego Gutiérrez, Yann Leroux, Ewa-Malgorzata Nowik Boltyk, Tobias Junghoefer, Erika Giangrisostomi, Ruslan Ovsyannikov, Maria Benedetta Casu, Jaume Veciana, Marta Mas-Torrent, Bruno Fabre, Concepció Rovira and Nuria Crivillers. Chem. Sci., 2019, Accepted Manuscript.

Hits: 556

Impact of the Ink Formulation and Coating Speed on the Polymorphism and Morphology of a Solution‐Sheared Thin Film of a Blended Organic Semiconductor

Written by icmab on 20 December 2019.

Adrián Tamayo, Sergi Riera‐Galindo, Andrew O. F. Jones, Roland Resel, Marta Mas‐Torrent. Adv. Mater. Interfaces 2019, 1900950.

Hits: 845

Atomic layer deposition of functional multicomponent oxides

Written by icmab on 17 December 2019.

Mariona Coll, and Mari Napari. APL Materials 7, 110901 (2019);

Hits: 846

Solution-processed thin films of a charge transfer complex for ambipolar field-effect transistors

Written by icmab on 12 December 2019.

Tommaso Salzillo, Antonio Campos and Marta Mas-Torrent. J. Mater. Chem. C, 2019,7, 10257-10263.

Hits: 967

A Solid‐State Aqueous Electrolyte‐Gated Field‐Effect Transistor as a Low‐Voltage Operation Pressure‐Sensitive Platform

Written by icmab on 03 December 2019.

Qiaoming Zhang, Francesca Leonardi, Raphael Pfattner, Marta Mas‐Torrent. Adv. Mater. Interfaces 2019, 6, 1900719

Hits: 890

Are the Accompanying Cations of Doping Anions Influential in Conducting Organic Polymers? The Case of the Popular PEDOT

Written by icmab on 04 November 2019.

Dr. Isabel Fuentes, Dr. María José Mostazo‐López, Dr. Zsolt Kelemen, Prof. Dr. Vicente Compañ, Dr. Andreu Andrio, Prof. Dr. Emilia Morallón, Prof. Dr. Diego Cazorla‐Amorós, Prof. Dr. Clara Viñas, Prof. Dr. Francesc Teixidor. Chemistry A European Journal, 06 August 2019.

Hits: 1018

Pores Dominate Ice Nucleation on Feldspars

Written by icmab on 15 October 2019.

E. Pach and A. Verdaguer*. J. Phys. Chem. C 2019, 123, 34, 20998-21004.

Hits: 1007

Charge Delocalization, Oxidation States, and Silver Mobility in the Mixed Silver–Copper Oxide AgCuO2¤

Written by icmab on 24 May 2019.

Abel Carreras, Sergio Conejeros, Agustín Camón, Alberto García, Nieves Casañ-Pastor*, Pere Alemany*, and Enric Canadell*. Inorg. Chem.,

Hits: 1142

3,2,1 and stop! An innovative, straightforward and clean route for the flash synthesis of metallacarboranes

Written by icmab on 21 May 2019.

Ines Bennour, Ana M. Cioran, Francesc Teixidor and Clara Viñas*. Green Chem., 2019,21, 1925-1928.

Hits: 1154

Slow-spin relaxation of a low-spin S = 1/2 FeIII carborane complex

Written by icmab on 17 May 2019.

Ana B. Buades, Victor S. Arderiu, Lindley Maxwell, Martín Amoza, Duane Choquesillo-Lazarte, Núria Aliaga-Alcalde, Clara Viñas, Francesc Teixidor* and Eliseo Ruiz*. Chem. Commun., 2019,55, 3825-3828.

Hits: 1177

Energy alignment and recombination in perovskite solar cells: weighted influence on the open circuit voltage

Written by icmab on 14 May 2019.

Ilario Gelmetti, Núria F. Montcada, Ana Pérez-Rodríguez, Esther Barrena,* Carmen Ocal, Inés García-Benito, Agustín Molina-Ontoria, Nazario Martín,* Anton Vidal-Ferran* and Emilio Palomares*. Energy Environ. Sci., 2019, Advance Article.

Hits: 1395

Water at surfaces and interfaces: From molecules to ice and bulk liquid

Written by icmab on 26 February 2019.

Tomoko K. Shimizu, Sabine Maier, Albert Verdaguer, Juan-Jesus Velasco-Velez, Miquel Salmeron. Progress in Surface Science. Volume 93, Issue 4, December 2018, Pages 87-107

Hits: 1737

Quantification of propagating and standing surface acoustic waves by stroboscopic X-ray photoemission electron microscopy

Written by icmab on 19 February 2019.

M. Foerster, N. Statuto, B. Casals, A. Hernández-Mínguez, S. Finizio, A. Mandziak, L. Aballe, J. M. Hernàndez Ferràs and F. Macià. J. Synchrotron Rad. (2019). 26

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A novel potentiometric microsensor for real-time detection of Irgarol using the ion-pair complex [Irgarol-H]+[Co(C2B9H11)2]−

Written by icmab on 15 January 2019.

A.Saini, J.Gallardo-Gonzalez, A. Baraket, I.Fuentes, C.Viñas, N.Zine, J.Bausells, F.Teixidor, A.Errachid. Sensors and Actuators B: Chemical, Volume 268, 1 September 2018, Pages 164-169.

Hits: 1563

Enantiopure Supramolecular Motifs of Self-Assembled Diamine-Based Chiral Molecules on Cu(100)

Written by icmab on 24 December 2018.

Rogger Palacios-Rivera, Esther Barrena*, Jordi Faraudo, Pierluigi Gargiani, Miguel Angel Niño, Dimitri Arvanitis, Iwona Kowalik, Juan José de Miguel, and Carmen Ocal*. J. Phys. Chem. C, 2018, 122 (42), pp 24129–24136

Hits: 1648

Faceted‐Charge Patchy LnF3 Nanocrystals with a Selective Solvent Interaction

Written by icmab on 27 November 2018.

Martínez‐Esaín, J. , Puig, T. , Obradors, X. , Ros, J. , Yáñez, R. , Faraudo, J. and Ricart, S. (2018) Angew. Chem. Int. Ed.. .

Hits: 1756

Donor–anion interactions in quarter-filled low-dimensional organic conductors

Written by icmab on 16 November 2018.

Jean-Paul Pouget,* Pere Alemany* and Enric Canadell*. Mater. Horiz., 2018,5, 590-640

Hits: 1942

Synthetic approaches in oxynitride chemistry

Written by icmab on 30 October 2018.

Amparo Fuertes. Progress in Solid State Chemistry, Volume 51, September 2018, Pages 63-70.

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