Search results for: Francesc Teixidor

Items from 1 to 20 out of 154 results

article

Pioneering the Power of Twin Bonds in a Revolutionary Double Bond Formation. Unveiling the True Identity of o‐Carboryne as o‐Carborene

Jordi Poater, Clara Viñas, Sílvia Escayola, Miquel Solà, more

Chemistry – A European Journal > 29 > 69 > n/a - n/a

The homolytic elimination of two H atoms from two adjacent carbons in benzene results in the aromatic product o‐benzyne. In a similar way, the homolytic elimination of two H atoms from the two adjacent carbons in 1,2‐C₂B₁₀H₁₂ results in the aromatic product o‐carboryne. In this work, we provide experimental and computational evidences that despite the similarity of o‐carboryne and o‐benzyne, the nature...

article

A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte (Adv. Funct. Mater. 47/2023)

Zhen Li, Xiao‐Bao Li, Mark E. Light, Anna E. Carrillo, more

Advanced Functional Materials > 33 > 47 > n/a - n/a

Metal–Organic Frameworks In article number 2307369, Elena Bartolomé, José Giner Planas, and co‐workers introduce a significant advancement in the synthesis of multi‐metal multivariate rare earth materials, which were previously inaccessible. The current methodology is anticipated to pave the way towards the development of new multifunctional materials exhibiting tailor‐made magnetic and optical properties...

article

A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte

Zhen Li, Xiao‐Bao Li, Mark E. Light, Anna E. Carrillo, more

Advanced Functional Materials > 33 > 47 > n/a - n/a

Multi‐metallic multivariate (MTV) rare earth (RE) metal−organic frameworks (MOFs) are of interest for the development of multifunctional materials, however examples with more than three RE cations are rare and obstructed by compositional segregation during synthesis. Herein, this work demonstrates the synthesis of a multi‐metallic MTV RE MOF incorporating two, four, six, or eight different RE ions...

article

Aromaticity and Extrusion of Benzenoids Linked to [o‐COSAN]⁻: Clar Has the Answer

Jordi Poater, Clara Viñas, David Olid, Miquel Solà, more

Angewandte Chemie > 134 > 22 > n/a - n/a

Benzene and pyrene can be synthetically linked to [o‐COSAN]⁻ keeping their aromaticity. In contrast, naphthalene and anthracene are extruded in the same reaction. We have proven that extrusion is only favorable if the number of Clar's π‐sextets remains constant. Thus, Clar has the answer to whether an attached polycyclic aromatic hydrocarbon to [o‐COSAN]⁻ is extruded or not.

article

Aromaticity and Extrusion of Benzenoids Linked to [o‐COSAN]⁻: Clar Has the Answer

Jordi Poater, Clara Viñas, David Olid, Miquel Solà, more

Angewandte Chemie International Edition > 61 > 22 > n/a - n/a

article

Light‐Induced On/Off Switching of the Surfactant Character of the o‐Cobaltabis(dicarbollide) Anion with No Covalent Bond Alteration

Abdelazim M. A. Abdelgawwad, Jewel Ann Maria Xavier, Daniel Roca‐Sanjuán, Clara Viñas, more

Angewandte Chemie > 133 > 49 > 25957 - 25961

Cobaltabis(dicarbollide) anion ([o‐COSAN]⁻) is a well‐known metallacarborane with multiple applications in a variety of fields. In aqueous solution, the cisoid rotamer is the most stable disposition in the ground state. The present work provides theoretical evidence on the possibility to photoinduce the rotation from the cisoid to the transoid rotamer, a conversion that can be reverted when the ground...

article

Light‐Induced On/Off Switching of the Surfactant Character of the o‐Cobaltabis(dicarbollide) Anion with No Covalent Bond Alteration

Abdelazim M. A. Abdelgawwad, Jewel Ann Maria Xavier, Daniel Roca‐Sanjuán, Clara Viñas, more

Angewandte Chemie International Edition > 60 > 49 > 25753 - 25757

article

Cover Feature: Reversibly Switchable Fluorescent Molecular Systems Based on Metallacarborane–Perylenediimide Conjugates (Chem. Eur. J. 1/2021)

Laura Parejo, Mahdi Chaari, Sara Santiago, Gonzalo Guirado, more

Chemistry – A European Journal > 27 > 1 > 4 - 4

Make it switch: By combining the versatile electrochemical behavior of cobalt‐based metallacarboranes with the excellent emission properties of perylenediimides, new fluorescent molecular switches were prepared that respond to redox stimuli. These systems not only surpass the performance of previous switches based on other metal complexes, but also allow the preparation of supramolecular fluorescent...

article

Reversibly Switchable Fluorescent Molecular Systems Based on Metallacarborane–Perylenediimide Conjugates

Laura Parejo, Mahdi Chaari, Sara Santiago, Gonzalo Guirado, more

Chemistry – A European Journal > 27 > 1 > 270 - 280

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. This, along with its low density negative charge, makes [Co(C₂B₉H₁₁)₂]⁻ very appealing to participate...

article

Bimodal Therapeutic Agents Against Glioblastoma, One of the Most Lethal Forms of Cancer

Marcos Couto, Catalina Alamón, Susana Nievas, Marina Perona, more

Chemistry – A European Journal > 26 > 63 > 14335 - 14340

About 95 % of people diagnosed with glioblastoma die within five years. Glioblastoma is the most aggressive central nervous system tumour. It is necessary to make progress in the glioblastoma treatment so that advanced chemotherapy drugs or radiation therapy or, ideally, two‐in‐one hybrid systems should be implemented. Tyrosine kinase receptors–inhibitors and boron neutron capture therapy (BNCT),...

article

Metallacarboranes as Photoredox Catalysts in Water

Isabel Guerrero, Zsolt Kelemen, Clara Viñas, Isabel Romero, more

Chemistry – A European Journal > 26 > 22 > 5027 - 5036

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. In most of the studied examples,...

article

Atomistic Simulations of COSAN: Amphiphiles without a Head‐and‐Tail Design Display “Head and Tail” Surfactant Behavior

David C. Malaspina, Clara Viñas, Francesc Teixidor, Jordi Faraudo

Angewandte Chemie International Edition > 59 > 8 > 3088 - 3092

Cobaltabisdicarbollide (COSAN) anions have an unexpectedly rich self‐assembly behavior, which can lead to vesicles and micelles without having a classical surfactant molecular architecture. This was rationalized by the introduction of new terminology and novel driving forces. A key aspect in the interpretation of COSAN behavior is the assumption that the most stable form of these ions is the transoid...

article

Atomistic Simulations of COSAN: Amphiphiles without a Head‐and‐Tail Design Display “Head and Tail” Surfactant Behavior

David C. Malaspina, Clara Viñas, Francesc Teixidor, Jordi Faraudo

Angewandte Chemie > 132 > 8 > 3112 - 3116

article

Cover Feature: Are the Accompanying Cations of Doping Anions Influential in Conducting Organic Polymers? The Case of the Popular PEDOT (Chem. Eur. J. 63/2019)

Isabel Fuentes, María José Mostazo‐López, Zsolt Kelemen, Vicente Compañ, more

Chemistry – A European Journal > 25 > 63 > 14254 - 14254

Conducting organic polymers (COPs) display attractive electrical properties, which can be modified with tuning. To this purpose, elaborate and sometimes cumbersome chemical modifications on the monomer are done. This work demonstrates a simple and efficient way to achieve such a tuning, just by focusing on the accompanying cations of the doping anions [Co(C₂B₉H₁₁)₂]⁻. These have been shown to be non‐innocent...

article

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

Isabel Fuentes, María José Mostazo‐López, Zsolt Kelemen, Vicente Compañ, more

Chemistry – A European Journal > 25 > 63 > 14308 - 14319

Conducting organic polymers (COPs) are made of a conjugated polymer backbone supporting a certain degree of oxidation. These positive charges are compensated by the doping anions that are introduced into the polymer synthesis along with their accompanying cations. In this work, the influence of these cations on the stoichiometry and physicochemical properties of the resulting COPs have been investigated,...

article

Dual Binding Mode of Metallacarborane Produces a Robust Shield on Proteins

Isabel Fuentes, Jordi Pujols, Clara Viñas, Salvador Ventura, more

Chemistry – A European Journal > 25 > 55 > 12820 - 12829

An inorganic sandwich molecule, Na[Co(C₂B₉H₁₁)₂], able to produce vesicles through self‐assembly and known to produce strong dihydrogen‐bond interactions with amine groups is capable of interacting with proteins. This dual non‐bonding ability of Na[Co(C₂B₉H₁₁)₂] is what makes this molecule unique: it can be firmly anchored to a protein surface and is capable of extending over it. To prove this, the...

article

Metallacarboranes on the Road to Anticancer Therapies: Cellular Uptake, DNA Interaction, and Biological Evaluation of Cobaltabisdicarbollide [COSAN]⁻

Isabel Fuentes, Tania García‐Mendiola, Shinichi Sato, Marcos Pita, more

Chemistry – A European Journal > 24 > 65 > 17239 - 17254

After uptake by U87 MG and A375 cancer cells, cobaltabisdicarbollide [COSAN]⁻ distributes between membrane and nucleus and presents no relevant cytotoxicity against both cell lines even for long incubation times. The cytotoxicity of Na[COSAN] was also tested towards one normal cell line, the V79 fibroblasts, in order to ascertain the noncytotoxic profile of the compound. As the cell's nucleus contains...

article

Frontispiece: Metallacarboranes on the Road to Anticancer Therapies: Cellular Uptake, DNA Interaction, and Biological Evaluation of Cobaltabisdicarbollide [COSAN]⁻

Isabel Fuentes, Tania García‐Mendiola, Shinichi Sato, Marcos Pita, more

Chemistry – A European Journal > 24 > 65 > n/a - n/a

After uptake by cancer cells, [3,3’‐Co(1,2‐closo‐C₂B₉H₁₁)₂] ([COSAN]⁻) distributes between the cell membrane and the nucleus, presenting no relevant cytotoxicity even after prolonged incubation times. The interaction between [COSAN]⁻ and CT‐dsDNA was investigated and a strong interaction and the formation of a nanohybrid CT‐dsDNA‐[COSAN] biomaterial was found. High binding affinity of [COSAN]⁻ to...

article

An Unprecedented Stimuli‐Controlled Single‐Crystal Reversible Phase Transition of a Metal–Organic Framework and Its Application to a Novel Method of Guest Encapsulation

Fangchang Tan, Ana López‐Periago, Mark E. Light, Jordi Cirera, more

Advanced Materials > 30 > 29 > n/a - n/a

The flexibility and unexpected dynamic behavior of a third‐generation metal–organic framework are described for the first time. The synthetic strategy is based on the flexibility and spherical shape of dipyridyl‐based carborane linkers that act as pillars between rigid Co/BTB (BTB: 1,3,5‐benzenetricarboxylate) layers, providing a 3D porous structure (1). A phase transition of the solid can be induced...

article

Cover Feature: Discovery of Potent EGFR Inhibitors through the Incorporation of a 3D‐Aromatic‐Boron‐Rich‐Cluster into the 4‐Anilinoquinazoline Scaffold: Potential Drugs for Glioma Treatment (Chem. Eur. J. 13/2018)

Marcos Couto, María Fernanda García, Catalina Alamón, Mauricio Cabrera, more

Chemistry – A European Journal > 24 > 13 > 3071 - 3071

An EGFR inhibitor that incorporates closo‐carborane has been shown to have higher affinity than erlotinib. The comparative docking analysis with compounds bearing bioisoster substructures demonstrated the relevance of the 3D aromatic boron‐rich moiety for interacting into the EGFR ATP binding region. The capability to accumulate in glioma cells, the ability to cross the blood–brain barrier and the...

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INFONA - science communication portal

Search results for: Francesc Teixidor

Pioneering the Power of Twin Bonds in a Revolutionary Double Bond Formation. Unveiling the True Identity of o‐Carboryne as o‐Carborene

A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte (Adv. Funct. Mater. 47/2023)

A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte

Aromaticity and Extrusion of Benzenoids Linked to [o‐COSAN]⁻: Clar Has the Answer

Aromaticity and Extrusion of Benzenoids Linked to [o‐COSAN]⁻: Clar Has the Answer

Light‐Induced On/Off Switching of the Surfactant Character of the o‐Cobaltabis(dicarbollide) Anion with No Covalent Bond Alteration

Light‐Induced On/Off Switching of the Surfactant Character of the o‐Cobaltabis(dicarbollide) Anion with No Covalent Bond Alteration

Cover Feature: Reversibly Switchable Fluorescent Molecular Systems Based on Metallacarborane–Perylenediimide Conjugates (Chem. Eur. J. 1/2021)

Reversibly Switchable Fluorescent Molecular Systems Based on Metallacarborane–Perylenediimide Conjugates

Bimodal Therapeutic Agents Against Glioblastoma, One of the Most Lethal Forms of Cancer

Metallacarboranes as Photoredox Catalysts in Water

Atomistic Simulations of COSAN: Amphiphiles without a Head‐and‐Tail Design Display “Head and Tail” Surfactant Behavior

Atomistic Simulations of COSAN: Amphiphiles without a Head‐and‐Tail Design Display “Head and Tail” Surfactant Behavior

Cover Feature: Are the Accompanying Cations of Doping Anions Influential in Conducting Organic Polymers? The Case of the Popular PEDOT (Chem. Eur. J. 63/2019)

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

Dual Binding Mode of Metallacarborane Produces a Robust Shield on Proteins

Metallacarboranes on the Road to Anticancer Therapies: Cellular Uptake, DNA Interaction, and Biological Evaluation of Cobaltabisdicarbollide [COSAN]⁻

Frontispiece: Metallacarboranes on the Road to Anticancer Therapies: Cellular Uptake, DNA Interaction, and Biological Evaluation of Cobaltabisdicarbollide [COSAN]⁻

An Unprecedented Stimuli‐Controlled Single‐Crystal Reversible Phase Transition of a Metal–Organic Framework and Its Application to a Novel Method of Guest Encapsulation

Cover Feature: Discovery of Potent EGFR Inhibitors through the Incorporation of a 3D‐Aromatic‐Boron‐Rich‐Cluster into the 4‐Anilinoquinazoline Scaffold: Potential Drugs for Glioma Treatment (Chem. Eur. J. 13/2018)

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