A high temperature reversible phase transition in a supramolecular complex of 15-crown-5 with tetraphenylboron sodium

2018 ◽  
Vol 42 (18) ◽  
pp. 14943-14948 ◽  
Author(s):  
Guo-Jun Yuan ◽  
Shao-Xian Liu ◽  
Zheng-Fang Tian ◽  
Xiao-Ming Ren
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Thermal Hysteresis ◽  
Supramolecular Complex ◽  
Reversible Phase Transition ◽  
Sodium Tetraphenylboron ◽  
Reversible Phase

High temperature (391 K) reversible phase transition and large thermal hysteresis (19 K) was observed in 15-crown-5 clathrates: [Na(15-crown-5)][BPh4] (15-crown-5 = 1,4,7,10,13-pentaoxacyclopentadecane, NaBPh4 = sodium tetraphenylboron).

scholarly journals Above Room Temperature Reversible Phase Transition Induces Distinct Dielectric and Nonlinear Optical Switching Response Behavior in Crown-Ether-Based Supramolecular Clathrate

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 184 ◽  
Author(s):  
Jing Jing ◽  
Fan Jiang ◽  
Yan-Li Wei ◽  
Chao Shi ◽  
Heng-Yun Ye ◽  
...  
Keyword(s):  
Phase Transition ◽  
Crown Ether ◽  
Optical Switching ◽  
Nonlinear Optical ◽  
Thermal Hysteresis ◽  
Switching Behavior ◽  
Stimuli Responsive ◽  
Scanning Calorimetry ◽  
Reversible Phase Transition ◽  
Reversible Phase

Stimuli-responsive materials with coexisting nonlinear optical (NLO) and dielectric properties are technologically important, which enable simultaneous conversion of optoelectronic properties between different states under external stimuli. By rationally screening guest cations (C6H5NF2)+ in the crown-ether inclusion system, we synthesized a crown-ether supramolecular compound [(C6H5NF2)(18-crown-6)][PF6] (1). Differential scanning calorimetry (DSC) showed that 1 undergoes a reversible phase transition above room temperatures (305 K/292 K), with a thermal hysteresis of 13 K. Temperature-dependent dielectric and NLO measurements show that the compound exhibits two distinct switching response behaviors. Structural analysis indicates that the order–disorder change of the host molecule 18-crown-6 and the guest organic cation during the phase transition induces the dielectric and NLO switching behavior of the compound.

A Surprisingly Large Thermal Hysteresis Loop in a Reversible Phase Transition of RbxMn [Fe(CN)6](x+2)/3×zH2O.

ChemInform ◽  
2005 ◽  
Vol 36 (14) ◽  
pp. no-no
Author(s):  
Shin-ichi Ohkoshi ◽  
Tomoyuki Matsuda ◽  
Hiroko Tokoro ◽  
Kazuhito Hashimoto
Keyword(s):  
Phase Transition ◽  
Hysteresis Loop ◽  
Thermal Hysteresis ◽  
Reversible Phase Transition ◽  
Thermal Hysteresis Loop ◽  
Reversible Phase

Reversible phase transition between metastable structures of Si(111)c2×8 and 1×1 studied by high-temperature STM

1998 ◽  
Vol 411 (1-2) ◽  
pp. L822-L827 ◽  
Author(s):  
Mitsuru Chida ◽  
Hiroki Minoda ◽  
Yasumasa Tanishiro ◽  
Katsumichi Yagi
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Metastable Structures ◽  
Reversible Phase Transition ◽  
Reversible Phase

A Surprisingly Large Thermal Hysteresis Loop in a Reversible Phase Transition of RbxMn[Fe(CN)6](x+2)/3·zH2O

2005 ◽  
Vol 17 (1) ◽  
pp. 81-84 ◽  
Author(s):  
Shin-ichi Ohkoshi ◽  
Tomoyuki Matsuda ◽  
Hiroko Tokoro ◽  
Kazuhito Hashimoto
Keyword(s):  
Phase Transition ◽  
Hysteresis Loop ◽  
Thermal Hysteresis ◽  
Reversible Phase Transition ◽  
Thermal Hysteresis Loop ◽  
Reversible Phase

Direct Observation of a Surface Phase Transition by hot Tunneling Microscopy

1992 ◽  
Vol 280 ◽  
Author(s):  
Ing-Shouh Hwang ◽  
Jene A. Golovchenko
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Direct Observation ◽  
Surface Phase ◽  
Tunneling Microscopy ◽  
Tunneling Microscope ◽  
Surface Phase Transition ◽  
Reversible Phase Transition ◽  
Reversible Phase

ABSTRACTWe study a reversible phase transition of one monolayer of Pb on a Ge(l11) surface over a range of temperature from below to above the transition temperature (∼175°C) with the tunneling microscope. The high temperature l×1 phase is a ordered monolayer l×l 2D solid. Below the transition temperature, Pb atoms are displaced from their ideal T1 positions to form trimers with periodicity.

Neutron diffraction study of the tetragonal – monoclinic phase transition in NdNbO4 and NdTaO4

2021 ◽  
Author(s):  
Matilde Saura-Múzquiz ◽  
Bryce Mullens ◽  
Helen Elizabeth Maynard-Casely ◽  
Brendan J. Kennedy
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Monoclinic Phase ◽  
Neutron Diffraction Study ◽  
Powder Neutron Diffraction ◽  
Reversible Phase Transition ◽  
Reversible Phase

Phase transition and high-temperature properties of NdNbO4 and NdTaO4 were studied in situ using powder neutron diffraction methods. Both oxides undergo a reversible phase transition from a monoclinic I2/a phase...

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