Ara es mostren els items 55-74 de 107

    • Phase transition in hydrogen-bonded 1-adamantane-methanol 

      Ben Hassine, Bacem; Negrier, Philippe; Barrio Casado, María del; Mondieig, Denise; Massip, Stephane; Tamarit Mur, José Luis (2015-08-01)
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      Accés obert
      The polymorphism of 1-adarnantane-methanol C11H18O has been investigated by differential thermal analysis and single-crystal and powder X-ray diffraction. Below the melting temperature (389.5 +/- 0.4 K), this compound ...
    • Pitfalls and feedback when constructing topological pressure-temperature phase diagrams 

      Céolin, René; Toscani, Siro; Rietveld, Ivo B.; Barrio Casado, María del; Tamarit Mur, José Luis (2017-04-18)
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      Accés obert
      The stability hierarchy between different phases of a chemical compound can be accurately reproduced in a topological phase diagram. This type of phase diagrams may appear to be the result of simple extrapolations, however, ...
    • Polymorphism and solid-solid phase transitions of hydrogen bonded 2-adamantanol and 2-methyl-2-adamantanol compounds 

      Salvatori, Alejandro; Negrier, Philippe; Massip, Stephane; Muñoz Duque, Antonio; Lloveras Muntané, Pol Marcel; Barrio Casado, María del; Tamarit Mur, José Luis (2022-05-28)
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      Accés obert
      The polymorphic behavior at normal pressure as a function of temperature of 2-adamantanol (C10H16O) and 2-methyl-2-adamantanol (C11H18O) has been investigated by single-crystal and powder X-ray diffraction as well as ...
    • Polymorphism in 2-X-Adamantane Derivatives (X = Cl, Br) 

      Negrier, Philippe; Barrio Casado, María del; Tamarit Mur, José Luis; Mondieig, Denise (2014-08-14)
      Article
      Accés restringit per política de l'editorial
      The polymorphism of two 2-X-adamantane derivatives, X = Cl, X = Br, has been studied by X-ray powder diffraction and normal- and high-pressure (up to 300 MPa) differential scanning calorimetry. 2-Br-adamantane displays a ...
    • Polymorphism in halogen-ethane derivatives: CCl3-CCl3 and ClF2C-CF2Cl 

      Negrier, Philippe; Tamarit Mur, José Luis; Barrio Casado, María del; Mondieig, Denise (2013-02-06)
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      Accés restringit per política de l'editorial
      The polymorphism of hexachloroethane, Cl3C−CCl3, has been reinvestigated by means of X-ray and neutron scattering. The long time unknown structure of the intermediate phase II of Cl3C−CCl3 has been determined as monoclinic ...
    • Polymorphism in halogen-ethane derivatives: CCl3-CF2Cl and CF3-CF2Cl 

      Negrier, Philippe; Barrio Casado, María del; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Mondieig, Denise (2012-01-03)
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      Accés restringit per política de l'editorial
      Molecular crystals of halogen–ethane derivatives C2X6–nYn (X = Cl, Y = F) are known to display order–disorder phase transitions involving changes of the translational, orientational, and conformational order. The appearance ...
    • 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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      Accés obert
      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)
      Article
      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 of benzylthiouracil, an active pharmaceutical ingredient against hyperthyroidism 

      Rietveld, Ivo B.; Allouchi, Hassan; Barrio Casado, María del; Céolin, René; Tamarit Mur, José Luis (2021-04-01)
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      Accés obert
      The crystal structures of dimorphic benzylthiouracil, a drug against hyperthyroidism, have been redetermined and the atom coordinates of the two independent molecules of form I have been obtained for the first time. The ...
    • Polymorphism of spironolactone: An unprecedented case of monotropy turning to enantiotropy with a huge difference in the melting temperatures 

      Rietveld, Ivo B.; Barrio Casado, María del; Lloveras Muntané, Pol Marcel; Céolin, René; Tamarit Mur, José Luis (2018-09-25)
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      Accés obert
    • 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 ...
    • Pressure-temperature phase diagram of the dimorphism of the anti-inflammatory drug nimesulide 

      Barrio Casado, María del; Huguet, Jordi; Robert, B.; Rietveld, Ivo B.; Céolin, René; Tamarit Mur, José Luis (2017-06-15)
      Article
      Accés obert
      Understanding the phase behavior of active pharmaceutical ingredients is important for formulations of dosage forms and regulatory reasons. Nimesulide is an anti-inflammatory drug that is known to exhibit dimorphism; however ...
    • Pressure–temperature state diagram for the phase relationships between benfluorex hydrochloride forms I and II: A case of enantiotropic behavior 

      Barrio Casado, María del; Maccaroni, Elisabetta; Rietveld, Ivo B.; Macpezzi, Luciana; Masciocchi, Norberto; Céolin, René; Tamarit Mur, José Luis (2011-11-03)
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      Accés restringit per política de l'editorial
      The active pharmaceutical ingredient racemic benfluorex hydrochloride (benfluorex–HCl) has an interesting phase behavior due to an elusive solid–solid phase transition. The stability hierarchy between different phases is ...
    • 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 ...
    • Relationship between the two-component system 1-Br-adamantane + 1-Cl-adamantane and the high-pressure properties of the pure components 

      Barrio Casado, María del; Levit Valenzuela, Rafael; Lloveras Muntané, Pol Marcel; Aznar Luque, Araceli; Negrier, Philippe; Mondieig, Denise; Tamarit Mur, José Luis (2018-03-15)
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      Accés obert
      The temperature-composition phase diagram of the two-component system 1-Br-adamantane and 1-Cl-adamantane has been determined by means of thermal analysis techniques and X-ray powder diffraction from the low-temperature ...
    • Relaxation dynamics vs crystallization kinetics in the amorphous state: the case of Stiripentol 

      Ruiz, Guadalupe N.; Romanini, Michela; Barrio Casado, María del; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Macovez, Roberto (2017-11-06)
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      Accés obert
      With the aim of finding a correlation between the crystallization kinetics and the molecular dynamics of a substance that would allow prediction of its crystallization time as a function of temperature for a given a ...
    • Reversible adiabatic temperature changes at the magnetocaloric and barocaloric effects in Fe49Rh51 

      Stern-Taulats, Enric; Gracia-Condal, Adrià; Planes Vila, Antoni; Lloveras Muntané, Pol Marcel; Barrio Casado, María del; Tamarit Mur, José Luis; Pramanick, Sabyasachi; Majumdar, Subham; Mañosa Carrera, Lluis (2015-10-12)
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      Accés obert
      We report on the adiabatic temperature changes (Delta T) associated with the magnetocaloric and barocaloric effects in a Fe49Rh51 alloy, For the magnetocaloric effect, data derived from entropy curves are compared to direct ...
    • Reversible and irreversible colossal barocaloric effects in plastic crystals 

      Aznar Luque, Araceli; Lloveras Muntané, Pol Marcel; Barrio Casado, María del; Negrier, Philippe; Planes Vila, Antoni; Mañosa Carrera, Lluis; Mathur, N.D.; Moya Raposo, Xavier; Tamarit Mur, José Luis (Royal Society of Chemistry (RSC), 2020)
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      Accés obert
      The extremely large latent heat exchanged in phase transitions involving strong molecular orientational disordering has recently led to the proposal of plastic crystals as a feasible solution for solid-state barocaloric ...
    • Reversible barocaloric effects over a large temperature span in fullerite C60 

      Li, Junning; Dunstan, David; Lou, Xiaojie; Planes Vila, Antoni; Manosa, L; Barrio Casado, María del; Tamarit Mur, José Luis; Lloveras Muntané, Pol Marcel (Royal Society of Chemistry (RSC), 2020-07-31)
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      Accés obert
      Solid-state cooling methods based on field-driven first-order phase transitions are often limited by significant hysteresis and small temperature span, which increase the input work required to drive the cooling cycle ...
    • Reversible colossal barocaloric effects near room temperature in 1-X-adamantane (X=Cl, Br) plastic crystals 

      Aznar Luque, Araceli; Negrier, Philippe; Planes Vila, Antoni; Manosa, L; Stern-Taulats, Enric; Moya Raposo, Xavier; Barrio Casado, María del; Tamarit Mur, José Luis; Lloveras Muntané, Pol Marcel (Elsevier, 2021-06)
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      Accés obert
      Plastic crystals undergo phase transitions with unusually large volume and entropy changes related to strong molecular orientational disordering. These features have led to a resurgent interest in these materials because ...