On the number of amorphous phases in n-butanol

Большаков, Б. В.; Dzhonson, Anatoly

doi:10.1016/j.jnoncrysol.2005.01.035

Cited by 25 publications

(8 citation statements)

References 37 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bolshakov and Dzhonson report in 2005 on the discovery of a new solid phase [67], obtained by isothermal annealing around 140 K, of amorphous n-butanol that melts at 170 K followed by crystallization. The melting temperature of crystals is Tm = 184 K and the melting heat Hm = 9280 Jmol -1 , far above the first glass transition temperature Tg  118 K [68].…”

Section: Heat Capacity Measurements Of N-butanol and Dsc Resultsmentioning

confidence: 99%

First-order transitions in glasses and melts induced by solid superclusters nucleated and melted by homogeneous nucleation instead of surface melting

Tournier¹

2019

Chemical Physics

View full text Add to dashboard Cite

Graphical abstract:Abstract: Supercooled liquids give rise, by homogeneous nucleation, to solid superclusters acting as building blocks of glass, ultrastable glass, and glacial glass phases before being crystallized. Liquid-to-liquid phase transitions begin to be observed above the melting temperature Tm as well as critical undercooling depending on critical overheating T/Tm. Solid nuclei exist above Tm and melt by homogeneous nucleation of liquid instead of surface melting. The Gibbs free energy change predicted by the classical nucleation equation is completed by an additional enthalpy which stabilize these solid entities during undercooling. A two-liquid model, using this renewed equation, predicts the new homogeneous nucleation temperatures inducing first-order transitions, and the enthalpy and entropy of new liquid and glass phases. These calculations are successfully applied to ethylbenzene, triphenyl phosphite, d-mannitol, n-butanol, Zr41.2Ti13.8Cu12.5Ni10Be22.5, Ti34Zr11Cu47Ni8, and Co81.5B18.5. A critical supercooling and overheating rate T/Tm = 0.198 of liquid elements is predicted in agreement with experiments on Sn droplets.

show abstract

Section: Heat Capacity Measurements Of N-butanol and Dsc Resultsmentioning

confidence: 99%

First-order transitions in glasses and melts induced by solid superclusters nucleated and melted by homogeneous nucleation instead of surface melting

Tournier¹

2019

Chemical Physics

View full text Add to dashboard Cite

show abstract

“…N -butanol has a melting temperature of T m = 183 K and is a glass former with an observed glass-transition temperature of T g = 118 K 16 17 . On quenching n -butanol with a rate of 20 K/min to a temperature below T m , we observe a transition in which the original liquid transforms into a chemically identical but physically different liquid.…”

Section: Resultsmentioning

confidence: 99%

Frustration of crystallisation by a liquid–crystal phase

Syme

Mosses

González‐Jiménez

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Frustration of crystallisation by locally favoured structures is critically important in linking the phenomena of supercooling, glass formation, and liquid-liquid transitions. Here we show that the putative liquid-liquid transition in n-butanol is in fact caused by geometric frustration associated with an isotropic to rippled lamellar liquid-crystal transition. Liquid-crystal phases are generally regarded as being “in between” the liquid and the crystalline state. In contrast, the liquid-crystal phase in supercooled n-butanol is found to inhibit transformation to the crystal. The observed frustrated phase is a template for similar ordering in other liquids and likely to play an important role in supercooling and liquid-liquid transitions in many other molecular liquids.

show abstract

“…Polyamorphic transitions and the related mechanisms of the glass transition have recently focused great attention from the evidence of a firstorder transition between the supercooled liquid and an apparently amorphous state, named glacial state, in triphenyl phosphite (TPP) 2,3 and n-butanol. 4,5 Such a transition was considered as a first-order liquid-liquid phase transition. 5 On the other hand, the glacial state was considered as the signature of defect-ordered phase, characterized by a crystalline symmetry incompatible with space tiling, 2 and corresponding to the existence of a preferred local structure developing in the deeply undercooled liquid.…”

Section: Introductionmentioning

confidence: 99%

Vibrational and structural properties of amorphous n-butanol: A complementary Raman spectroscopy and X-ray diffraction study

Hédoux

Guinet

Paccou

et al. 2013

The Journal of Chemical Physics

View full text Add to dashboard Cite

Raman spectroscopy and X-ray diffraction experiments were performed in the liquid, undercooled liquid, and glassy states of n-butanol. Clear correlated signatures are obtained below the melting temperature, from both temperature dependences of the low-wavenumber vibrational excitations and the intermediate-range order characterized by a prepeak detected in the different amorphous states. It was found that these features are related to molecular associations via strong hydrogen bonds, which preferentially develop at low temperature, and which are not compatible with the long-range order of the crystal. This study provides information on structural heterogeneities developing in hydrogen-bonded liquids, associated to the undercooled regime and the inherent glass transition. The analysis of the isothermal abortive crystallization, 2 K above the glass transition temperature, has given the opportunity to analyze the early stages of the crystallization and to describe the origin of the frustration responsible for an uncompleted crystallization.

show abstract

On the number of amorphous phases in n-butanol

Cited by 25 publications

References 37 publications

First-order transitions in glasses and melts induced by solid superclusters nucleated and melted by homogeneous nucleation instead of surface melting

First-order transitions in glasses and melts induced by solid superclusters nucleated and melted by homogeneous nucleation instead of surface melting

Frustration of crystallisation by a liquid–crystal phase

Vibrational and structural properties of amorphous n-butanol: A complementary Raman spectroscopy and X-ray diffraction study

Contact Info

Product

Resources

About