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Ara es mostren els items 9-28 de 46

    • 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)
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      Accés obert
      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 ...

    • 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)
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      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 ...

    • Eutectic mixture formation and relaxation dynamics of coamorphous mixtures of two benzodiazepine drugs 

      Valenti, Sofia; Cazorla Silva, Claudio; Romanini, Michela; Tamarit Mur, José Luis; Macovez, Roberto (Multidisciplinary Digital Publishing Institute (MDPI), 2023-01-01)
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      The formation of coamorphous mixtures of pharmaceuticals is an interesting strategy to improve the solubility and bioavailability of drugs, while at the same time enhancing the kinetic stability of the resulting binary ...

    • 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)
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      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 and reversible barocaloric effect in trinuclear spin-crossover complex Fe3(bntrz)6(tcnset)6 

      Romanini, Michela; Lloveras Muntané, Pol Marcel; Barrio Casado, María del; Aznar Luque, Araceli; Gracia Condal, Adrià; Emre, Baris; Tamarit Mur, José Luis; Planes Vila, Antoni; Manosa, L (2021-03)
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      A giant barocaloric effect (BCE) in a molecular material Fe3(bntrz)6(tcnset)6 (FBT) is reported, where bntrz = 4-(benzyl)-1,2,4-triazole and tcnset = 1,1,3,3-tetracyano-2-thioethylepropenide. The crystal structure of FBT ...

    • 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)
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      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. ...

    • Glass transition, crystallization kinetics, and inter-conformer relaxation dynamics of amorphous mitotane and related compounds 

      Romanini, Michela; Pérez Valmaseda, Alex; Macovez, Roberto (Elsevier, 2022-12-15)
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      We employ differential scanning calorimetry, broadband dielectric spectroscopy and optical microscopy to investigate the glass transition, molecular relaxation dynamics, and isothermal recrystallization kinetics of amorphous ...

    • Heat sink avalanche dynamics in elastocaloric Cu-Al-Ni single crystal detected by infrared calorimetry and Gaussian filtering 

      Capellera, Guillem; Lanniciello, Lucia; Romanini, Michela; Vives Santa-Eulàlia, Eduard (2021-10-11)
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      The physics behind the cooling process occurring in an elastocaloric Cu–Al–Ni wire during the martensite to austenite transition after stress release is studied. A previous experiment using infrared imaging determined the ...

    • 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)
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      Accés restringit per política de l'editorial
      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)
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      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 ...

    • Inter-enantiomer conversion dynamics and Johari–Goldstein relaxation of benzophenones 

      Romanini, Michela; Macovez, Roberto; Tamarit Mur, José Luis (Nature, 2021-10-12)
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      Accés obert
      We employ temperature- and pressure-dependent dielectric spectroscopy, as well as differential scanning calorimetry, to characterize benzophenone and the singly-substituted ortho-bromobenzophenone derivative in the liquid ...

    • Large barocaloric effects in two novel ferroelectric molecular plastic crystals 

      Salvatori, Alejandro; Aguilà Aviles, David; Aromí, Guillem; Mañosa Carrera, Lluis; Planes Vila, Antoni; Lloveras Muntané, Pol Marcel; Pardo Soto, Luis Carlos; Appel, Markus; Nataf, Guillaume F.; Giovannelli, Fabien; Barrio Casado, María del; Tamarit Mur, José Luis; Romanini, Michela (Royal Society of Chemistry (RSC), 2023-05-19)
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      Accés restringit per política de l'editorial
      Materials undergoing pressure-driven solid–solid phase transformations can be a valuable alternative for eco-friendly refrigeration, heat pumping and waste heat recovery based on the barocaloric effect. Ferroelectric ...

    • Mixtures of m-fluoroaniline with apolar aromatic molecules: Phase behaviour, suppression of H-bonded clusters, and local H-bond relaxation dynamics 

      Romanini, Michela; Barrio Casado, María del; Macovez, Roberto; Capaccioli, Simon; Tamarit Mur, José Luis (2019-12-15)
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      We employ differential scanning calorimetry, IR spectroscopy, X-ray powder diffraction and dielectric spectroscopy to characterize binary mixtures of m-fluoroaniline (mFA), a rigid-molecule glass former, with two ...

    • Molecular diffusion and dc conductivity perfectly correlated with molecular rotational dynamics in a plastic crystalline electrolyte 

      Zachariah, Manesh; Romanini, Michela; Tripathi, Pragya; Tamarit Mur, José Luis; Macovez, Roberto (2015-01-01)
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    • Nose temperature and anticorrelation between recrystallization kinetics and molecular relaxation dynamics in amorphous morniflumate at high pressure 

      Romanini, Michela; Valenti, Sofia; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto; Rodríguez Martín, Sergio (2019-07-05)
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      We probe the dielectric response of the supercooled liquid phase of Morniflumate, a drug with anti-inflammatory and antipyretic properties, studying in particular the pressure and temperature dependence of the relaxation ...

    • Orientational relaxations in solid (1,1,2,2)tetrachloroethane 

      Tripathi, Pragya; Mitsari, Efstratia; Romanini, Michela; Serra, Pablo; Tamarit Mur, José Luis; Zuriaga, Jose Mariano; Macovez, Roberto (2016)
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      We employ dielectricspectroscopy and molecular dynamic simulations to investigate the dipolar dynamics in the orientationally disordered solid phase of (1,1,2,2)tetrachloroethane. Three distinct orientational dynamics are ...

    • Polymorphism of 1,3-X-adamantanes (X = Br, OH, CH3) and the crystal plastic phase formation ability 

      Negrier, Philippe; Ben Hassine, Bacem; Barrio Casado, María del; Romanini, Michela; Mondieig, Denise; Tamarit Mur, José Luis (2020-02-21)
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      The polymorphism of 1,3-dimethyladamantane (13DMA), 1,3-adamantanediol (13DOHA) and 1,3-dibromoadamantane (13DBrA) has been studied by X-ray powder diffraction, density measurements and differential scanning calorimetry ...

    • Polymorphism of 2-Adamantanone 

      Negrier, Philippe; Barrio Casado, María del; Romanini, Michela; Tamarit Mur, José Luis; Mondieig, Denise; Krivchikov, Alexander I; Kepinski, L.; Jezowski, Andrzej; Szewczyk, Daria (2014-05-07)
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      Accés restringit per política de l'editorial
      The polymorphism of 2-adamantanone (C10H14O) has been investigated by means of X-ray diffraction and high-pressure thermal analysis. The intricate behavior of the low-temperature crystalline phases has been disentangled. ...

    • Polymorphism with conformational isomerism and incomplete crystallization in solid ethanolamine 

      Romanini, Michela; Negrier, Philippe; Tripathi, Pragya; Gournis, Dimitrios; Lira, Kyriaki-Marina; Barrio Casado, María del; Pardo Soto, Luis Carlos; Tamarit Mur, José Luis; Macovez, Roberto (2019-09-25)
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      Accés obert
      We employ calorimetry, Rietveld refinement of X-ray powder diffraction, broadband dielectric spectroscopy and molecular dynamics simulations, to investigate the phase behavior, crystal structure, dc conductivity and ...

    • Protonic surface conductivity and proton space-charge relaxation in hydrated fullerol 

      Mitsari, Efstratia; Romanini, Michela; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2017-03-09)
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      Accés restringit per política de l'editorial
      The ac dielectric properties of both anhydrous fullerol (C-60(OH)(24)) and hydrated fullerol with 20% water mass content are investigated by means of temperature-dependent dielectric spectroscopy. Anhydrous polycrystalline ...