Now showing items 1-20 of 44

    • A ferrimagnetically coupled liquid crystal 

      Griesar, Klaus; Athanassopoulou, Maria A.; Soto Bustamante, Eduardo; Tomkowicz, Zbigniew; Zaleski, Andrzej J.; Haase, Wolfgang (WILEY-V C H VERLAG GMBH, 1997-01)
      Ferrimagnetic coupling in a mesogen is reported for the first time for the compound Mn-III[((OC12H25)(4)TPP)](TCNE) . 2 toluene (where TPP = tetraphenyl porphyrin, TCNE = tetracyanoethylene), which displays liquid crystal ...
    • Antiferroelectric achiral mesogenic polymer 

      Soto Bustamante, Eduardo; Yablonskii, S. V.; Ostrovskii, B. I.; Beresnev, L. A.; Blinov, L. M.; Haase, W. (Elsevier Science B. V., 1996)
      X-ray structure determination and pyroelectric measurements have been carried out on mesogenic mixtures composed of an achiral side-chain polymer and its monomer. The mixtures show antiferroelectric polarization hysteresis ...
    • Antiferroelectric behaviour of achiral mesogenic polymer mixtures 

      Soto Bustamante, Eduardo; Yablonskii, S. V.; Ostrovsky, B. I.; Beresnev, L. A.; Blinov, L. M.; Haase, W. (TAYLOR & FRANCIS LTD, 1996-12)
      X-ray structure determination and pyroelectric and piezoelectric measurements have been carried out on mesogenic mixtures composed of achiral side chain polymers and their monomers. Certain mixtures show antiferroelectric ...
    • Antiferroelectricity in achiral mesogenic mixtures of organic materials 

      Werner, R.; Weyrauch, T.; Navarrete Encina, Patricio; Haase, W.; Soto Bustamante, Eduardo (ELSEVIER SCIENCE BV, 2000-05-12)
      To clarify the mechanism involved in the appearance of antiferroelectric properties in mixtures of polymers containing achiral mesogenic side chains and their monomers, X-ray investigation was carried out in pyroelectrically ...
    • Bilayer-by-bilayer antiferroelectric ordering in freely suspended films of an achiral polymer-monomer liquid crystal mixture 

      Link, D. R.; Clark, N. A.; Ostrovskii, B. I.; Soto Bustamante, Eduardo (AMERICAN PHYSICAL SOC, 2000-01)
      Thin freely suspended films of a mixture of an achiral side-chain liquid crystal polymer and its monomer have been studied with depolarized reflected light microscopy. We observe that regions with an odd number of bilayers ...
    • Conformational constraint in ferroelectric liquid crystals incorporating a pyrrolidine-type ring: FLC materials comprising parallel dipolar moments 

      Ely, Fernando; Cristiano, Rodrigo; Longo, Ricardo; Vergara Toloza, Rafael; Soto Bustamante, Eduardo; Gallardo, Hugo (2007)
      Ferroelectric liquid crystals bearing a chiral pyrrolidine-type ring were prepared using (-)-(S)-malic acid as a building block. The compounds were characterized using the thermal analysis techniques of DSC and POM, ...
    • CORRELATION BETWEEN MAGNETIC-PROPERTIES AND MOLECULAR-STRUCTURE OF SOME METALLO-MESOGENS 

      Bikchantaev, I.; Galyametdinov, Y.; Prosvirin, A.; Griesar, K.; Soto Bustamante, Eduardo; Haase, W. (TAYLOR & FRANCIS LTD LONDON, 1995-02)
      The behaviour of a large number of paramagnetic metallo-mesogenic molecules with Cu and VO in different mesophases in a magnetic field was investigated by EPR techniques and magnetic susceptibility measurements. The ...
    • Design of highly polarized achiral mesogenic composites 

      Soto Bustamante, Eduardo; Vergara Toloza, Rafael Orlando; Haase, Wolfgang (2012)
      The synthesis of one homologous series of methacrylate monomers and their polymers was carried out to observe the dependence between the polarization and some structural aliphatic features. Investigations of the thermoanalytical, ...
    • Electrochemical study of nitrostilbene derivatives: nitro group as a probe of the push-pull effect 

      Bollo Dragnic, Soledad; Soto Bustamante, Eduardo; Núñez Vergara, Luis; Squella Serrano, Juan (ELSEVIER SCIENCE, 2000-09-29)
      This paper reports electrochemical (tast polarography, differential pulse polarography, cyclic voltammetry) and spectroscopic investigations covering a series of stilbene derivatives having either one or two electron-donating ...
    • Er-doped nanostructured BaTiO3 for NIR to visible upconversion 

      Meneses Franco, Ariel; Campos Vallette, Marcelo; Vásquez Arancibia, Sergio; Soto Bustamante, Eduardo (MDPI AG, 2018)
      Photoluminescent mechanisms in erbium-doped barium titanate nanoparticle systems were studied. Er3+ ions were introduced into the BaTiO3 lattice by the sol-gel method. The resulting Er3+ concentration was between 0% and ...
    • Estudio de Reactividad de Complejos de Coordinación en Reacciones de Polimerización de Olefinas 

      Valdebenito Calabrán, Carolina Esther (Universidad de ChileCyberDocs, 2010)
    • Ferroelectricity in achiral liquid-crystal systems 

      Yablonskii, S. V.; Soto Bustamante, Eduardo; Vergara Toloza, Rafael Orlando; Haase, Wolfgang (WILEY-V C H VERLAG GMBH, 2004-11-04)
      Ferroelectricity can be defected in systems consisting of liquid-crystal line monomer-polymer mixtures possessing no chiral centers The ferroelectric behavior in mixtures of achiral liquid-crystalline side-chain polymers ...
    • Incommensurate structures investigated by X-ray studies of electropolymerised methacrylic monomer with TiO2 nanoparticles 

      Martínez Miranda, L. J.; Romero Hasler, P.; Meneses Franco, A.; Soto Bustamante, Eduardo (Taylor & Francis, 2017)
      We explore the possibility of producing polymer nanocomposites with an ordered distribution of nanoparticles by using an electropolymerizable liquid crystal (LC) monomer. The nanoparticles are added to the monomer before ...
    • Influencia de Quiralidad en Compuestos Líquido Cristalinos Polares: Modelación Molecular de los Monómeros Estudiados 

      Rodríguez Lehyt, Guillermo Antonio (Universidad de ChilePrograma Cybertesis, 2006)
      Se sintetizaron los compuestos denominado M6R8, M6R7q y el polímero PM6R8 para estudiar el efecto de un centro quiral en sistemas aquirales con fases antiferroeléctricas. Los compuestos se caracterizaron por Microscopía ...
    • Interacciones de fullereno con compósitos antiferroeléctrico polímero/monómero 

      Yavár Bardavid, Gastón Andrés (Universidad de Chile, 2014)
      Se estudiaron mezclas de tres monómeros líquidos cristalinos con fullereno: dos de ellos son azo compuestos A6OA12 y A6A12, y el tercero una imina, A11R6. No se apreció una buena miscibilidad entre dichos compuestos y ...
    • Investigations on new achiral polymeric liquid crystalline mixtures using a pyroelectric modulation technique 

      Navarrete Encina, Patricio; Weyrauch, T.; Soto Bustamante, Eduardo; Werner, R. (GORDON BREACH SCI PUBL LTD, 2000)
      In this paper we report on the synthesis and characterization of new mixtures of achiral liquid crystalline side-chain polymers with their monomers. The samples have a basic structure similar to materials prepared earlier ...
    • Light sensitive antiferroelectric achiral copolymers 

      Soto Bustamante, Eduardo; González Henríquez, Carmen M.; Vergara Toloza, Rafael Orlando; Haase, Wolfgang (ROYAL SOC CHEMISTRY, 2012)
      Five copolymers were prepared by polymerization of azo-benzene methacrylate monomers in solution using AIBN as initiator. The mesophases were observed by a polarizing light microscope which showed tilted smectic C phases ...
    • Liquid crystalline side chain methacrylic azo containing polymers 

      González Henríquez, Carmen M.; Soto Bustamante, Eduardo; Waceols-Gordillo, D. A.; Haase, Wolfgang (2009)
      This paper describes the synthesis and characterisation of methacrylic liquid crystalline side chain polymer containing azo group, with (PM6OAn) and without (PM6An) hydroxyl group. The characterisation was done by using a ...
    • Liquid crystalline textures and polymer morphologies resulting from electropolymerisation in liquid crystal phases 

      Kasch, N.; Dierking, I.; Turner, M.; Romero Hasler, P. N.; Soto Bustamante, Eduardo (Royal Soc Chemistry, 2015)
      A small fraction of an acrylate liquid crystalline monomer (<= 5%) is mixed into nematic and smectic liquid crystalline phases, and polymerised through the application of a voltage (electropolymerisation). Polarising ...
    • Longitudinal and Transverse Pyroelectric Effects in a Chiral Ferroelectric Liquid Crystal 

      Yablonskii, S. V.; Bondarchuk, V. V.; Soto Bustamante, Eduardo; Romero Hasler, P. N.; Ozaki, M.; Yoshino, K. (Pleiades Publishing, 2015)
      In this study, we compare the results of experimental investigations of longitudinal and transverse pyroelectric effects in a chiral ferroelectric crystal. In a transverse geometry, we studied freely suspended liquid-crystal ...