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.

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.

scholarly journals Ba3Mg3(BO3)3F3 polymorphs with reversible phase transition and high performances as ultraviolet nonlinear optical materials

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Miriding Mutailipu ◽  
Min Zhang ◽  
Hongping Wu ◽  
Zhihua Yang ◽  
Yihan Shen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Materials ◽  
Nonlinear Optical ◽  
Nonlinear Optical Materials ◽  
Reversible Phase Transition ◽  
Reversible Phase

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.

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

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.

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