scholarly journals (S)-Alanine ethyl ester tetracyanidoborate, (C5H12NO)[B(CN)4]

IUCrData ◽  
2021 ◽  
Vol 6 (6) ◽  
Author(s):  
Tim Peppel ◽  
Martin Köckerling
Keyword(s):  
Phase Transition ◽  
Melting Point ◽  
Ethyl Ester ◽  
Room Temperature ◽  
Solid Phase ◽  
Asymmetric Unit ◽  
Slow Evaporation ◽  
Dsc Measurements ◽  
Solid Phase Transition ◽  
Molecular Salt

The title molecular salt, C5H12NO+·C4BN4 − or (C5H12NO)[B(CN)4], was obtained as single crystals by slow evaporation of a solution of the compound in acetonitrile over several weeks. The asymmetric unit contains two (S)-alanine ethyl ester cations and two tetracyanidoborate anions, which are linked by N—H...N hydrogen bonds. The compound exhibits a relatively low melting point of 110°C and shows a solid–solid phase transition near room temperature (T s–s = 29°C) on the basis of DSC measurements.

Room-Temperature Switching Behavior in CNT/Hexadecane Composites

MRS Advances ◽  
2018 ◽  
Vol 3 (54) ◽  
pp. 3213-3220
Author(s):  
Yulong Wu ◽  
Peng Meng ◽  
Quan Zhang ◽  
Zhiyuan Tan ◽  
Guoan Cheng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
Room Temperature ◽  
Solid Phase ◽  
Switching Behavior ◽  
Switching Effect ◽  
Automatic Temperature ◽  
Automatic Temperature Control ◽  
Solid Phase Transition

ABSTRACTThe room-temperature switching effect is of great interest for many applications, such as smart buildings, sensors, thermal energy storage and automatic temperature control. In this paper, we report a room-temperature switchable carbon nanotube (CNT)/hexadecane composites. Electrical conductivity, thermal conductivity and permittivity of the CNT/hexadecane composites can be regulated around 18°C and the maximal switching ratio reaches 5 orders of magnitude, 3 times and 106.4, respectively. The switching behavior of composites is caused by rearrangement of the carbon nanotube fillers in hexadecane matrix during liquid-solid phase transition. It is found that surface modification is necessary to improve dispersion stability. Effects of filler properties on switching behaviour are also discussed.

Solidification of Ionic Liquids: Theory and Techniques

2010 ◽  
Vol 63 (4) ◽  
pp. 544 ◽  
Author(s):  
Anja-Verena Mudring
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solid Phase ◽  
Soft Materials ◽  
Separation Science ◽  
Vast Number ◽  
Plastic Crystals ◽  
Thermal Fluids ◽  
Solid Phase Transition

Ionic liquids (ILs) have become an important class of solvents and soft materials over the past decades. Despite being salts built by discrete cations and anions, many of them are liquid at room temperature and below. They have been used in a wide variety of applications such as electrochemistry, separation science, chemical synthesis and catalysis, for breaking azeotropes, as thermal fluids, lubricants and additives, for gas storage, for cellulose processing, and photovoltaics. It has been realized that the true advantage of ILs is their modular character. Each specific cation–anion combination is characterized by a unique, characteristic set of chemical and physical properties. Although ILs have been known for roughly a century, they are still a novel class of compounds to exploit due to the vast number of possible ion combinations and one fundamental question remains still inadequately answered: why do certain salts like ILs have such a low melting point and do not crystallize readily? This Review aims to give an insight into the liquid–solid phase transition of ILs from the viewpoint of a solid-state chemist and hopes to contribute to a better understanding of this intriguing class of compounds. It will introduce the fundamental theories of liquid–solid-phase transition and crystallization from melt and solution. Aside form the formation of ideal crystals the development of solid phases with disorder and of lower order like plastic crystals and liquid crystals by ionic liquid compounds are addressed. The formation of ionic liquid glasses is discussed and finally practical techniques, strategies and methods for crystallization of ionic liquids are given.

Solid–solid phase transition study of ε-CL-20/binder composites

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 859-865 ◽  
Author(s):  
Changping Guo ◽  
Dunju Wang ◽  
Bing Gao ◽  
Jun Wang ◽  
Bo Luo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Phase ◽  
Solid Phase Transition ◽  
Transition Study ◽  
Dsc Curves

The comparison of solid–solid phase transition (ε → γ polymorph) of CL-20 and Cl-20/composites revealed by DSC curves.

scholarly journals A Liquid-to-Solid Phase Transition of the ALS Protein FUS Accelerated by Disease Mutation

Cell ◽  
2015 ◽  
Vol 162 (5) ◽  
pp. 1066-1077 ◽  
Author(s):  
Avinash Patel ◽  
Hyun O. Lee ◽  
Louise Jawerth ◽  
Shovamayee Maharana ◽  
Marcus Jahnel ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Phase ◽  
Disease Mutation ◽  
Solid Phase Transition
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