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Now showing items 21-40 of 103

  • Dynamic characterization of crystalline and glass phases of deuterated 1,1,2,2 tetrachloroethane 

    Perez, Silvina C.; Zuriaga, Jose Mariano; Serra, Pablo; Wolfenson, Alberto; Negrier, Philippe; Tamarit Mur, José Luis (2015-10-07)
    Article
    Open Access
    A thorough characterization of the gamma, beta, and glass phases of deuterated 1,1,2,2 tetrachloroethane (C2D2Cl4) via nuclear quadrupole resonance and Molecular Dynamic Simulations (MDSs) is reported. The presence of ...

  • Dynamic heterogeneity in an orientational glass 

    Caballero, Nirvana B.; Zuriaga, Jose Mariano; Tamarit Mur, José Luis; Serra, Pablo (2017-11-14)
    Article
    Open Access
    The family of compounds CBrnCl4-n has been proven helpful in unraveling microscopic mechanisms responsible for glassy behavior. Some of the family members show translational ordered phases with minimal disorder which appears ...

  • Dynamics of orientationally disordered mixed crystal sharing Cl-adamantane and CN-adamantane 

    Martínez García, Julio Cesar; Capaccioli, Simon; Díez Berart, Sergio; Tamarit Mur, José Luis; Barrio Casado, María del; Veglio, Néstor Raúl; Pardo Soto, Luis Carlos (2010-01-27)
    Article
    Restricted access - publisher's policy
    Orientationally disordered (OD) mixed crystals formed between cyanoadamantane (CN-A) and chloroadamantane (Cl-A) have been thermodynamically characterized by means of thermal analysis and X-ray diffraction. The dynamics ...

  • Effects of internal molecular degrees of freedom on the thermal conductivity of some glasses and disordered crystals 

    Davydova, N. A.; Baran, J.; Jezowski, A.; Krivchikov, A.I.; Korolyuk, O.A.; Sharapova, I.V.; Tamarit Mur, José Luis; Bermejo, F.J.; Pardo Soto, Luis Carlos; Rovira Esteva, Muriel; Ruíz Martín, María Dolores (2012-01-01)
    Article
    Restricted access - publisher's policy
    The thermal conductivity κ(T ) of the fully ordered stable phase II, the metastable phase III, the orientationally disordered (plastic) phase I, as well as the nonergodic orientational glass (OG) phase, of the glass ...

  • Effects of site-occupation disorder on the low-temperature thermal conductivity of molecular crystals 

    Krivchikov, Alexander I; Vdovichenko, Georgii A.; Korolyuk, O. A.; Bermejo, F. Javier; Pardo Soto, Luis Carlos; Tamarit Mur, José Luis; Jezowski, Andrzej; Szewczyk, Daria (2015-01-01)
    Article
    Open Access
    The thermal conductivity of CBrnCl4-n,(n = 0,1,2) and 2-adamantanone (C10H14O) crystals which exhibit substitutional disorder has been measured for temperatures between 2 K and 150 K. Such temperatures comprise signatures ...

  • Emergence of glassy features in halomethane crystals 

    Moratalla Martín, Manuel Eduardo; Gebbia, Jonathan Fernando; Ramos Ruiz, Miguel Angel; Pardo Soto, Luis Carlos; Tamarit Mur, José Luis (American Physical Society (APS), 2019-01-02)
    Article
    Open Access
    Both structural glasses and disordered crystals are known to exhibit anomalous thermal, vibrational, and acoustic properties at low temperatures or low energies, what is still a matter of lively debate. To shed light on ...

  • Emergence of glassy-like dynamics in an orientationally ordered phase 

    Romanini, Michela; Negrier, Philippe; Tamarit Mur, José Luis; Capaccioli, Simon; Barrio Casado, María del; Pardo Soto, Luis Carlos; Mondieig, Denise (2012-04-04)
    Article
    Open Access
    The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined ...

  • Enantiomer resolution by pressure increase: inferences from experimental and topological results for the binary enantiomer system (R)- and (S)-mandelic acid 

    Rietveld, Ivo B.; Barrio Casado, María del; Tamarit Mur, José Luis; Do, Bernard; Céolin, René (2011-11-02)
    Article
    Restricted access - publisher's policy
    In pharmacy, racemic compounds are often problematic, because generally only one of the enantiomers possesses therapeutic activity and it is often difficult to separate them. Even though this problem is likely as old ...

  • Enhancement of the physical and chemical stability of amorphous drug-polymer mixtures via cryogenic comilling 

    Romanini, Michela; Lorente, Marta; Schammé, Benjamin; Delbreilh, Laurent; Dupray, Valérie; Coquerel, Gerard; Tamarit Mur, José Luis; Macovez, Roberto (American Chemical Society (ACS), 2018-11-27)
    Article
    Open Access
    Amorphous dispersions of the Biclotymol antiseptic are obtained in polyvinylpyrrolidone (PVP), for different drug loadings, by comilling at temperatures below the glass transition of both components. Characterization of ...

  • Experimental and topological determination of the pressure-temperature phase diagram of morniflumate, a pharmaceutical ingredient with anti-inflammatory properties 

    Barrio Casado, María del; Tamarit Mur, José Luis; Céolin, René; Robert, Benoit; Guechot, C.; Teulon, J.M.; Rietveld, Ivo B. (2017-09-01)
    Article
    Open Access
    The pressure-temperature phase diagram of morniflumate (niflumic acid ß-morpholinoethyl ester) has been obtained by high-pressure thermal analysis. In addition, calorimetric melting data (TI¿L = (348.1 ± 0.4) K and ¿HI¿L ...

  • Formulation and characterization of mucoadhesive controlled release matrix tablets of captopril 

    Saurí, J.; Zachariah, Manesh; Macovez, Roberto; Tamarit Mur, José Luis; Millán, Daniel; Suñé Pou, M.; García Montoya, E.; Pérez Lozano, P.; Miñarro, M.; Ticó, J. R.; Suñé Negr, J. M. (2017-12-01)
    Article
    Open Access
    The purpose of this study is to characterize controlled release matrix tablets of captopril and to find out the physicochemical properties that have an effect on the mucoadhesion process. The hydrophilic matrix tablets ...

  • From figh-temperature orientationally disordered mixed crystals to low-temperature complex formation in the two-component system (CH3)3CBr + Cl3CBr 

    Barrio Casado, María del; Negrier, Philippe; Tamarit Mur, José Luis; Mondieig, Denise (2011-02-02)
    Article
    Restricted access - publisher's policy
    The phase diagram of the two-component systems (CH(3))(3)CBr + Cl(3)CBr has been experimentally determined by means of differential scanning calorimetry and X-ray powder diffraction techniques from the low-temperature ...

  • Genuine antiplasticizing effect of water on a glass-former drug 

    Ruiz Tabbia, Guadalupe Natalia; Romanini, Michela; Hauptmann, Astrid; Loerting, Thomas; Shalaev, Evgenyi; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Macovez, Roberto (Macmillan Publishers, 2017-08-07)
    Article
    Open Access
    Water is the most important plasticizer of biological and organic hydrophilic materials, which generally exhibit enhanced mechanical softness and molecular mobility upon hydration. The enhancement of the molecular dynamics ...

  • Giant barocaloric effects at low pressure in ferrielectric ammonium sulphate 

    Lloveras Muntané, Pol Marcel; Stern Taulats, Enric; Barrio Casado, María del; Tamarit Mur, José Luis; Crossley, Sam; Li, Wei; Pomjakushin, Vladimir; Planes Vila, Antoni; Mañosa Carrera, Lluis; Mathur, N.D.; Moya, Xavier (2015-11-01)
    Article
    Open Access
    Caloric effects are currently under intense study due to the prospect of environment-friendly cooling applications. Most of the research is centred on large magnetocaloric effects and large electrocaloric effects, but the ...

  • Giant barocaloric effects over a wide temperature range in the superionic conductor AgI 

    Aznar Luque, Araceli; LLoveras, Pol; Romanini, Michela; Barrio Casado, María del; Tamarit Mur, José Luis; Cazorla Silva, Claudio; Errandonea Ponce, Daniel; Mathur, N.D.; Planes, Antoni; Moya, Xavier; Mañosa Carrera, Lluis (2017-11-29)
    Article
    Open Access
    Current interest in barocaloric effects has been stimulated by the discovery that these pressure-driven thermal changes can be giant near ferroic phase transitions in materials that display magnetic or electrical order. ...

  • Giant solid-state barocaloric effect in the Ni-Mn-In magnetic shape-memory alloy 

    Mañosa, Lluís; Gonzalez Alonso, David; Planes, Antoni; Bonot, Erell; Barrio Casado, María del; Tamarit Mur, José Luis; Aksoy, Seda; Acet, Mehmed (2010-06-01)
    Article
    Open Access
    Solid-state materials showing giant caloric effects near room temperature could provide an alternative to cooling devices based on gas cycles. Strong emphasis has so far been dedicated to caloric effects induced by a ...

  • Glassy Anomalies in the Low-Temperature Thermal Properties of a Minimally Disordered Crystalline Solid 

    Gebbia, Jonathan Fernando; Ramos, M. A.; Szewczyk, Daria; Jezowski, Andrzej; Krivchikov, Alexander; Horbatenko, Y.V; Guidi, T.; Bermejo, F. J.; Tamarit Mur, José Luis (2017-11-21)
    Article
    Open Access
    The low-temperature thermal and transport properties of an unusual kind of crystal exhibiting minimal molecular positional and tilting disorder have been measured. The material, namely, low-dimensional, highly anisotropic ...

  • Hopping conductivity and polarization effects in a fullerene derivative salt 

    Macovez, Roberto; Zachariah, Manesh; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis (2014-06-12)
    Article
    Restricted access - publisher's policy
    Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the C60O24Na 24 fulleride. The conduction properties of this organic material match the so-called universal behavior ...

  • Implanted muon spin spectroscopy on 2-O-adamantane: a model system that mimics the liquid 

    Romanini, Michela; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Bermejo, F. J.; Fernandez Perea, Ricardo; Pratt, F. L. (2017-03-01)
    Article
    Open Access
    The transition taking place between two metastable phases in 2-O-adamantane, namely the [Formula: see text] cubic, rotator phase and the lower temperature P21/c, Z  =  4 substitutionally disordered crystal is studied by ...

  • Influence of thermal treatment on thermal properties of adamantane derivatives 

    Szewczyk, Daria; Jezowski, Andrzej; Krivchikov, Alexander I; Tamarit Mur, José Luis (2015-05-01)
    Article
    Restricted access - publisher's policy
    Heat transport mechanisms present in 2-adamantanone and 1-cyanoadamantane crystals were investigated in a broad temperature range. To characterize scattering processes, thermal conductivity and heat capacity measurements ...