A calorimetric study on the low temperature dynamics of doped ice V and its reversible phase transition to hydrogen ordered ice XIII

2008 ◽  
Vol 10 (41) ◽  
pp. 6313 ◽  
Author(s):  
Christoph G. Salzmann ◽  
Paolo G. Radaelli ◽  
John L. Finney ◽  
Erwin Mayer
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Calorimetric Study ◽  
Reversible Phase Transition ◽  
Temperature Dynamics ◽  
Reversible Phase

scholarly journals The low-temperature triclinic crystal structure of silver 3-sulfobenzoic acid

2020 ◽  
Vol 76 (8) ◽  
pp. 1275-1278
Author(s):  
Reuben T. Bettinger ◽  
Philip J. Squattrito ◽  
Darpandeep Aulakh
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Low Temperature ◽  
Room Temperature ◽  
Monoclinic Structure ◽  
Structure Space ◽  
Reversible Phase Transition ◽  
Triclinic Structure ◽  
Reversible Phase ◽  
Acidic Hydrogen

Poly[(μ4-3-carboxybenzenesulfonato)silver(I)], Ag(O3SC6H4CO2H) or [Ag(C7H5O5S)] n , has been found to undergo a reversible phase transition from monoclinic to triclinic between 160 and 150 K. The low-temperature triclinic structure (space group P\overline{1}) has been determined at 100 K. In contrast to the reported room temperature monoclinic structure, in which the nearly equivalent carboxylate C—O distances indicate that the acidic hydrogen is randomly distributed between the O atoms, at 100 K the C—O (protonated) and C=O (unprotonated) bonds are clearly resolved, resulting in the reduction in symmetry from C2/c to P\overline{1}.

A low temperature reversible phase transition for 1,1'-bis-(ferrocenyldimethylsilyl)ferrocenylene, (η5-FcSiMe2C5H4)2Fe, an oligomeric model for silyleneferrocenylene polymers

2000 ◽  
Vol 78 (11) ◽  
pp. 1511-1518 ◽  
Author(s):  
Mikhail Yu Antipin ◽  
Ivan I Vorontsov ◽  
Irene I Dubovik ◽  
Vladimir Papkov ◽  
Francisco Cervantes-Lee ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Phase Space ◽  
Low Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
Space Group ◽  
Reversible Phase Transition ◽  
Reversible Phase

We have reinvestigated the solid state structure of 1,1'-bis-(ferrocenyldimethylsilyl)ferrocenylene, (η5-FcSiMe2C5H4)2Fe, Fc = (η5-C5H5)Fe(η5-C5H4). Using a DSC technique we observed a reversible phase transition for this compound at 169(3)K with ΔH = 1.1 kJ/mol, and ΔS = 6.54 J/mol K. A single crystal X-ray diffraction study has demonstrated that this phase change involves a transformation from a high temperature phase, space group P21/c, Z = 2, to a triclinic low temperature phase, space group P[Formula: see text], Z = 4. The phase transition involves the loss of the molecular crystallographic center of symmetry and rotations about the terminal and central cyclopentadienyl ring pairs. The results are compared to those reported for ferrocene.Key words: solid state, phase transition, silyleneferrocenylene.

Nature of the √3α to 3 × 3 reversible phase transition at low temperature in Sn/Ge (111)

2001 ◽  
Vol 175-176 ◽  
pp. 201-206 ◽  
Author(s):  
G Le Lay ◽  
M Goshtasbi Rad ◽  
M Göthelid ◽  
U.O Karlsson ◽  
J Avila ◽  
...  
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Reversible Phase Transition ◽  
Reversible Phase

Temperature-Dependent Solid-state Luminescence and Reversible Phase Transition of (n-Bu4N)[Au(SC6H3-3,5-Me2)2]

2003 ◽  
Vol 32 (11) ◽  
pp. 1002-1003 ◽  
Author(s):  
Seiji Watase ◽  
Takayuki Kitamura ◽  
Nobuko Kanehisa ◽  
Masami Nakamoto ◽  
Yasushi Kai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Temperature Dependent ◽  
Reversible Phase Transition ◽  
Reversible Phase ◽  
State Luminescence

Photoinduced reversible phase transition of azobenzene-containing polydiacetylene crystals

2016 ◽  
Vol 52 (97) ◽  
pp. 14059-14062 ◽  
Author(s):  
Woohyun Baek ◽  
Jung-Moo Heo ◽  
Seungwhan Oh ◽  
Sang-hwa Lee ◽  
Jaeyong Kim ◽  
...  
Keyword(s):  
Phase Transition ◽  
Reversible Phase Transition ◽  
Reversible Phase

A photoinduced reversible phase transition with a simultaneous crystal tearing phenomenon was observed in an azobenzene-containing supramolecular polydiacetylene (PDA) crystal.

Preparation of PVA/PEG Phase Change Composite Nanofibers by Electrospinning

2011 ◽  
Vol 306-307 ◽  
pp. 37-40 ◽  
Author(s):  
Da Hui Sun ◽  
Tian Yu Xu ◽  
Yong Jia Liu ◽  
Mei Zhang
Keyword(s):  
Phase Transition ◽  
Phase Change ◽  
Composite Nanofibers ◽  
Diameter Distribution ◽  
Weight Percentage ◽  
Weight Content ◽  
Reversible Phase Transition ◽  
Change Characteristics ◽  
Micro Morphology ◽  
Reversible Phase

Phase change PVA / PEG composite nanofibers were prepared by electrospinning, micro-morphology of PVA / PEG fibers with different weight content were analyzed, the phase change characteristics were also analyzed. The result showed that well distributed composite nanofibers which composed by PVA/PEG blend solution can be obtained by electrospinning.PVA fibreforming were influenced because of the existence of PEG, including bond, irregular block, small rough, uneven diameter distribution in fibers. PVA/PEG blend solution of 4:6 weight content was well fibreforming compared with other different weight content.The continuity of spinneret flow in electrospinning would directly affected by polymer solution consentrition and viscosity. Further research about which and the influence in fibers diameter and morphology will be explored. Composite nanofibers possessed reversible phase transition characteristics,Tm Essentially unchanged ,Tcwere related to the weight percentage of PEG/PVA, at the same time, the enthalpy will increase along with the gradually increase in weight percentage of PEG.

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