Carbon dioxide induced structural phase transition in metal–organic frameworks CPO-27

CrystEngComm ◽  
2020 ◽  
Vol 22 (26) ◽  
pp. 4353-4358
Author(s):  
Breogán Pato-Doldán ◽  
Mali H. Rosnes ◽  
Dmitry Chernyshov ◽  
Pascal D. C. Dietzel
Keyword(s):  
Phase Transition ◽  
Carbon Dioxide ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Metal Organic Frameworks ◽  
Honeycomb Structure ◽  
Metal Organic

The framework of CO2 saturated CPO-27 is deformed below 110 K into a superstructure of the original honeycomb structure.

scholarly journals Elastic Properties and Energy Loss Related to the Disorder–Order Ferroelectric Transitions in Multiferroic Metal–Organic Frameworks [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3]

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3125
Author(s):  
Zhiying Zhang ◽  
Hongliang Yu ◽  
Xin Shen ◽  
Lei Sun ◽  
Shumin Yue ◽  
...  
Keyword(s):  
Phase Transition ◽  
Energy Loss ◽  
Elastic Properties ◽  
Ferroelectric Phase ◽  
Loss Modulus ◽  
Structural Phase ◽  
Metal Organic Frameworks ◽  
First Order ◽  
Metal Organic ◽  
Elastic Anomalies

Elastic properties are important mechanical properties which are dependent on the structure, and the coupling of ferroelasticity with ferroelectricity and ferromagnetism is vital for the development of multiferroic metal–organic frameworks (MOFs). The elastic properties and energy loss related to the disorder–order ferroelectric transition in [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] were investigated using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The DSC curves of [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] exhibited anomalies near 256 K and 264 K, respectively. The DMA results illustrated the minimum in the storage modulus and normalized storage modulus, and the maximum in the loss modulus, normalized loss modulus and loss factor near the ferroelectric transition temperatures of 256 K and 264 K, respectively. Much narrower peaks of loss modulus, normalized loss modulus and loss factor were observed in [(CH3)2NH2][Mg(HCOO)3] with the peak temperature independent of frequency, and the peak height was smaller at a higher frequency, indicating the features of first-order transition. Elastic anomalies and energy loss in [NH4][Mg(HCOO)3] near 256 K are due to the second-order paraelectric to ferroelectric phase transition triggered by the disorder–order transition of the ammonium cations and their displacement within the framework channels, accompanied by the structural phase transition from the non-polar hexagonal P6322 to polar hexagonal P63. Elastic anomalies and energy loss in [(CH3)2NH2][Mg(HCOO)3] near 264 K are due to the first-order paraelectric to ferroelectric phase transitions triggered by the disorder–order transitions of alkylammonium cations located in the framework cavities, accompanied by the structural phase transition from rhombohedral R3¯c to monoclinic Cc. The elastic anomalies in [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] showed strong coupling of ferroelasticity with ferroelectricity.

Phase transition in metal–organic complex trans-PtCl2(PEt3)2 under pressure: insights into the molecular and crystal structure

CrystEngComm ◽  
2018 ◽  
Vol 20 (26) ◽  
pp. 3728-3740 ◽  
Author(s):  
Naini Bajaj ◽  
Himal Bhatt ◽  
K. K. Pandey ◽  
H. K. Poswal ◽  
A. Arya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Hydrogen Bond ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Molecular And Crystal Structure ◽  
Supramolecular Architecture ◽  
Organic Complex ◽  
Metal Organic Complex ◽  
Metal Organic

Molecular reorientations result in structural phase transition in trans-PtCl2(PEt3)2 under pressure, leading to a hydrogen bond assisted supramolecular architecture.

EPR Study of Structural Phase Transition in Manganese-Doped [(CH3)2NH2][Zn(HCOO)3] Metal–Organic Framework

2015 ◽  
Vol 119 (43) ◽  
pp. 24522-24528 ◽  
Author(s):  
Mantas Šimėnas ◽  
Aneta Ciupa ◽  
Mirosław Ma̧czka ◽  
Andreas Pöppl ◽  
Ju̅ras Banys
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Metal Organic Framework ◽  
Structural Phase ◽  
Metal Organic ◽  
Organic Framework

Isothermal phase equilibria and structural phase transition in the carbon dioxide+cyclopropane mixed-gas hydrate system

2009 ◽  
Vol 284 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Takashi Makino ◽  
Yoshihiro Ogura ◽  
Yuuki Matsui ◽  
Takeshi Sugahara ◽  
Kazunari Ohgaki
Keyword(s):  
Phase Transition ◽  
Carbon Dioxide ◽  
Phase Equilibria ◽  
Structural Phase Transition ◽  
Gas Hydrate ◽  
Structural Phase ◽  
Mixed Gas

Structural phase transition in perovskite metal–formate frameworks: a Potts-type model with dipolar interactions

2016 ◽  
Vol 18 (27) ◽  
pp. 18528-18535 ◽  
Author(s):  
Mantas Šimėnas ◽  
Sergejus Balčiūnas ◽  
Mirosław Ma̧czka ◽  
Jūras Banys ◽  
Evaldas E. Tornau
Keyword(s):  
Phase Transition ◽  
Monte Carlo ◽  
Structural Phase ◽  
Metal Organic Frameworks ◽  
Monte Carlo Study ◽  
Type Model ◽  
Dipolar Interactions ◽  
Disorder Phase Transition ◽  
Metal Organic ◽  
Metal Formate

A Monte Carlo study of a statistical model describing the order–disorder phase transition in perovskite-based [(CH3)2NH2][M(HCOO)3] dense metal–organic frameworks.

Two novel metal–organic coordination polymers based on ligand 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide with phase transition, and ferroelectric and dielectric properties

CrystEngComm ◽  
2017 ◽  
Vol 19 (39) ◽  
pp. 5907-5914 ◽  
Author(s):  
Lizhuang Chen ◽  
Qin Ji ◽  
Xingang Wang ◽  
Qijian Pan ◽  
Xingxing Cao ◽  
...  
Keyword(s):  
Phase Transition ◽  
Dielectric Properties ◽  
Low Temperature ◽  
Structural Phase Transition ◽  
Coordination Polymers ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Structural Phase ◽  
Metal Organic

The synthesis of two low-temperature structural phase transition compounds {[Ag3(dabcodo)(NO3)3]·H2O}n (1) and [Ca(Dabcodo)(H2O)4Cl2]n (2) are described. Compound 1 displayed ferroelectric–ferroelectric phase transition.

scholarly journals Surface structural phase transition induced by the formation of metal–organic networks on the Si(111)--In surface

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21790-21798 ◽  
Author(s):  
T. Suzuki ◽  
J. Lawrence ◽  
J. M. Morbec ◽  
P. Kratzer ◽  
G. Costantini
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Metal Organic ◽  
Organic Networks

We studied the adsorption of 7,7,8,8-tetracyanoquinodimethane (TCNQ) on the Si(111)--In surface, a known surface superconductor.

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