Reversible phase transition and switchable dielectric behaviors triggered by rotation and order-disorder motions of crowns

2018 ◽  
Vol 47 (11) ◽  
pp. 3851-3856 ◽  
Author(s):  
Yi Liu ◽  
Hai-Tao Zhou ◽  
Shao-Peng Chen ◽  
Yu-Hui Tan ◽  
Chang-Feng Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Crown Ether ◽  
Reversible Phase Transition ◽  
Rotation Motion ◽  
Reversible Phase

Compound 1 shows apparent step-like dielectric changes near the phase transition, which are triggered by the synergetic rotation motion of 18-C-6 crown ether cycles and hexafluorophosphate anions.

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.

Unusual high-temperature reversible phase transition containing dielectric and nonlinear optical switches in host–guest supramolecular crown ether clathrates

2018 ◽  
Vol 54 (58) ◽  
pp. 8076-8079 ◽  
Author(s):  
Yan-Li Wei ◽  
Jing Jing ◽  
Chao Shi ◽  
Heng-Yun Ye ◽  
Zhong-Xia Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Crown Ether ◽  
Optical Switching ◽  
Nonlinear Optical ◽  
Optical Switches ◽  
Reversible Phase Transition ◽  
Switching Material ◽  
Reversible Phase

[(C6H5NF2)(18-crown-6)][HClO4] is a novel high-temperature dielectric and nonlinear optical switching material based on crown ether clathrates.

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
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