Teresa Sierra

Instituto de Nanociencia y Materiales de Aragón

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José Luís Serrano

Universidad de Zaragoza

Joaquín Barberá

Universidad de Zaragoza

Raquel Giménez

Universidad de Zaragoza

Pilar Romero

Universidad de Zaragoza

M. Blanca Ros

Universidad de Zaragoza

Alexandre Lancelot

Instituto de Nanociencia y Materiales de Aragón

J. L. Serrano

Universidad de Zaragoza

Beatriz Feringán

Universidad de Zaragoza

Francisco Vera

University of Bologna

Mercedes Marcos

Universidad de Zaragoza

Cooperative Institutions

Universidad de Zaragoza

Consejo Superior de Investigaciones Científicas

Instituto de Nanociencia y Materiales de Aragón

Centre National de la Recherche Scientifique

Centro Médico Sanitas Zaragoza

University of the Basque Country

Hospital Infantil de México Federico Gómez

Universitat de Barcelona

Universidad Autónoma de Madrid

Universitat Autònoma de Barcelona

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Promising nanomaterials in the fight against malaria

Journal of Materials Chemistry B (2020)

Lívia Neves Borgheti-Cardoso María San Anselmo Elena Lantero Alexandre Lancelot José Luís Serrano

Nanomaterials can offer customized tools for prophylactic and therapeutic purposes that bring new solutions in different stages of malaria infection.

Nanomaterials

10.1039/d0tb01398f

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Citations (49)

Chiral hexacatenar metallomesogens: supramolecular organization versus steric demand of chiral cores

Journal of Materials Chemistry (2002)

Matthias Lehmann Teresa Sierra Joaquín Barberá José Luís Serrano Robert A. Parker

Hexacatenar chiral oxazoline complexes were prepared in a stereospecific synthesis. Metals (Pd, Ni, Cu, Zn), lateral alkoxy chains (OC6H13, OC12H25), sterically demanding alkyl groups (CH3, C4H9) on the chiral rigid centre and the number of nuclei incorporated in the complex core (mononuclear, orthopalladated dinuclear) were varied in order to achieve supramolecular organization of the phasmid-like molecules in liquid crystal phases. Mesomorphic properties were not observed in neat materials, but phase diagrams of binary mixtures with TNF demonstrate that steric repulsion can be overcome by intercalation of the electron-acceptor TNF. In spite of the presence of six lateral chains, SmA phases were found exclusively. The structures of the SmA phases were found to have additional order with respect to SmA phases formed by calamitic molecules. Further examination of the complexes in host nematic materials demonstrated their use as chiral dopants to induce cholesteric LC phases.

Mesogen

Chirality

10.1039/b109487d

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Citations (21)

Polar Switching in a Lyotropic Columnar Nematic Liquid Crystal Made of Bowl‐Shaped Molecules

Advanced Materials (2015)

Julia Guilleme Emma Cavero Teresa Sierra J. Ortega C. L. Folcia

A polar response in a lyotropic columnar nematic material is reported. The material accommodates bowl-shaped molecules with strong axial dipole moments in column segments without head-to-tail invariance. Optical second-harmonic-generation methods confirm that the nematic columns align unidirectionally under an applied electric field and the material develops remnant macroscopic polarization observable for hours. The switching takes place by a flip of the columns.

Lyotropic

Biaxial nematic

10.1002/adma.201500238

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Citations (32)

Self-assembly modulation in ionic PAMAM derivatives

Soft Matter (2013)

Silvia Hernández‐Ainsa Elisabetta Fedeli Joaquín Barberá Mercedes Marcos Teresa Sierra

The self-assembly behaviour both in the bulk and water of a series of amphiphilic dendrimers constituted by second generation PAMAM ionically functionalized with different amounts of myristic acid is shown here. The number of acids in the dendrimer determines the liquid-crystal properties and the structural parameters of their supramolecular organization. Most of them present mesomorphism, organizing in a smectic A mesophase, with a layer spacing decreasing when increasing the number of acids. All these dendrimers form well-defined nanoobjects in water. Micelles and broken lamellae have been found for compounds with low acid contents. In contrast, dendrimers with higher fatty acid contents self-assemble forming nanospheres with a lamellar nanostructure. All compounds are able to trap the hydrophobic molecule 9,10-diphenylanthracene independent of the acid contents. Interestingly, the trapped hydrophobic molecule dominates the self-assembly trend of the dendrimers with low acid contents and thus different nanoobjects are found after the encapsulation.

Myristic acid

10.1039/c3sm52393d

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Citations (18)

Low Molecular Weight Lyotropic Metallomesogens

Teresa Sierra

Lyotropic

10.1002/9783527615094.ch2

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Citations (2)

Low and High Frequency Relaxations of a Ferroelectric Liquid Crystal

Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals (1995)

M. R. de la Fuente Santos Merino M. Á. Pérez Jubindo Teresa Sierra

Abstract Broadband dielectric measurements on a ferroelectric liquid crystal have been carried out. The alignment was planar and the cell and sample holder were the same in the whole frequency range. Five different relaxations have been obtained and characterized: soft mode, Goldstone mode, molecular reorientation around the transversal axis, molecular reorientation around the longitudinal axis and a ferroelectric domain mode. Strengths and frequencies of these modes have been obtained in the different phases for different bias fields.

Soft modes

Goldstone

10.1080/10587259508038668

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Citations (12)

Ferroelectric Liquid Crystals for Nonlinear Optics: Orientation of the Disperse Red 1 Chromophore along the Ferroelectric Liquid Crystal Polar Axis

Journal of the American Chemical Society (1996)

David M. Walba Daniel J. Dyer Teresa Sierra P.L.H.M. Cobben Renfan Shao

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFerroelectric Liquid Crystals for Nonlinear Optics: Orientation of the Disperse Red 1 Chromophore along the Ferroelectric Liquid Crystal Polar Axis†David M. Walba, Daniel J. Dyer, Teresa Sierra, Peter L. Cobben, Renfan Shao, and Noel A. ClarkView Author Information Department of Chemistry and Biochemistry and Optoelectronic Computing Systems Center Campus Box 215, University of Colorado Boulder, Colorado 80309-0215 Cite this: J. Am. Chem. Soc. 1996, 118, 5, 1211–1212Publication Date (Web):February 7, 1996Publication History Received19 July 1995Published online7 February 1996Published inissue 1 January 1996https://pubs.acs.org/doi/10.1021/ja952387phttps://doi.org/10.1021/ja952387prapid-communicationACS PublicationsCopyright © 1996 American Chemical SocietyRequest reuse permissionsArticle Views627Altmetric-Citations39LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (2)»Supporting Information Supporting Information SUBJECTS:Absorption,Chromophores,Liquid crystals,Mixtures,Polarization Get e-Alerts

Chromophore

Crystal (programming language)

10.1021/ja952387p

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Citations (42)

The first semifluorinated liquid crystalline tetrathiafulvalene

Synthetic Metals (1999)

Javier Garı́n J. Orduna Teresa Sierra Raquel Andreu Jack Cousseau

Tetrathiafulvalene

10.1016/s0379-6779(98)00519-0

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Citations (0)

Switchable Columnar Metallomesogens

Chemistry - A European Journal (2000)

José Luis Serrano Teresa Sierra

Chiral columnar liquid crystals have recently appeared as a promising new type of ferroelectric materials. To date, all the columnar liquid crystals that have been reported to show ferroelectric switching consist of organic compounds. However, metal-containing liquid crystals open this field to a significant number of new structures and offer the possibility of adding to the ferroelectric behavior other properties inherent to the presence of metals in the structure, such as magnetism, as well as the use of new methods of characterization (EPR, synchrotron radiation, etc.). The potential of columnar metal-containing liquid crystals as ferroelectric materials has been demonstrated even though only a few organic columnar ferroelectric liquid crystals have been described. As a first approach to this type of material, this concepts article describes the results obtained with chiral metal beta-diketonates that show ferroelectric switching in the columnar mesophase. It has been shown that these materials have a helical columnar arrangement in the mesomorphic state, and a chiral superstructure has been proposed from circular dichroism studies. This type of supramolecular structure plays a fundamental role in the ferroelectric properties of these compounds. The discussion is mainly focused on the strategy employed for the molecular design, and on the interpretation of the mesophase structure and the electrooptic effect. The use of a diverse range of techniques, both those commonly used in the field of liquid crystals and those that are more specific will be highlighted, and the principles of these specific techniques are summarized together with a justification of their applicability to this study.

10.1002/(sici)1521-3765(20000303)6:5<759::aid-chem759>3.0.co;2-t

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Citations (63)

Orthogonal Action of Noncovalent Interactions for Photoresponsive Chiral Columnar Assemblies

Angewandte Chemie International Edition (2010)

Francisco Vera Joaquín Barberá Pilar Romero José Luís Serrano M. Blanca Ros

Making a stack: Helical columnar architectures are prepared by a hierarchical self-assembly process involving H-bonding, π–π, and ion–dipole interactions (see picture). The strategic combination of these supramolecular interactions within mesomorphic systems yields materials in which photoinduced chirality and the incorporation of ions can be used to design multifunctional liquid crystals.

Chirality

Supramolecular chirality

Non-covalent interactions

Supramolecular assembly

10.1002/anie.201000580

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Citations (46)