Theoretical study on the topotactic transformation and memory effect of M (II) M (III)-layered double hydroxides

2017 ◽  
Vol 43 (13-16) ◽  
pp. 1338-1347 ◽  
Author(s):  
Qingting Meng ◽  
Hong Yan
Keyword(s):  
Memory Effect ◽  
Layered Double Hydroxides ◽  
Theoretical Study ◽  
Double Hydroxides ◽  
Topotactic Transformation

Theoretical Study of the Catalytic Performance of Activated Layered Double Hydroxides in the Cyanoethylation of Alcohols

2019 ◽  
Vol 123 (14) ◽  
pp. 8777-8784 ◽  
Author(s):  
Cristina Cuautli ◽  
Jaime S. Valente ◽  
J. C. Conesa ◽  
M. Verónica Ganduglia-Pirovano ◽  
Joel Ireta
Keyword(s):  
Layered Double Hydroxides ◽  
Theoretical Study ◽  
Catalytic Performance ◽  
Double Hydroxides

scholarly journals Luminescent Layered Double Hydroxides Intercalated with an Anionic Photosensitizer via the Memory Effect

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 153 ◽  
Author(s):  
Alexandre Teixeira ◽  
Alysson Morais ◽  
Ivan Silva ◽  
Eric Breynaert ◽  
Danilo Mustafa
Keyword(s):  
Aqueous Solution ◽  
Memory Effect ◽  
Layered Double Hydroxides ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Calcination Temperatures ◽  
Anionic Species ◽  
Benzenetricarboxylic Acid ◽  
Double Hydroxides ◽  
Rehydration Process

Layered double hydroxides (LDHs) containing Eu3+ activators were synthesized by coprecipitation of Zn2+, Al3+, and Eu3+ in alkaline NO3−-rich aqueous solution. Upon calcination, these materials transform into a crystalline ZnO solid solution containing Al and Eu. For suitably low calcination temperatures, this phase can be restored to LDH by rehydration in water, a feature known as the memory effect. During rehydration of an LDH, new anionic species can be intercalated and functionalized, obtaining desired physicochemical properties. This work explores the memory effect as a route to produce luminescent LDHs intercalated with 1,3,5-benzenetricarboxylic acid (BTC), a known anionic photosensitizer for Eu3+. Time-dependent hydration of calcined LDHs in a BTC-rich aqueous solution resulted in the recovery of the lamellar phase and in the intercalation with BTC. The interaction of this photosensitizer with Eu3+ in the recovered hydroxide layers gave rise to efficient energy transfer from the BTC antennae to the Eu3+ ions, providing a useful tool to monitor the rehydration process of the calcined LDHs.

DFT-Based Simulation and Experimental Validation of the Topotactic Transformation of MgAl Layered Double Hydroxides

ChemPhysChem ◽  
2016 ◽  
Vol 17 (17) ◽  
pp. 2754-2766 ◽  
Author(s):  
Shi-Tong Zhang ◽  
Yibo Dou ◽  
Junyao Zhou ◽  
Min Pu ◽  
Hong Yan ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Experimental Validation ◽  
Double Hydroxides ◽  
Topotactic Transformation
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