Development of a Fast and Clean Intercalation Method for Organic Molecules into Layered Double Hydroxides

2013 ◽  
Vol 13 (3) ◽  
pp. 1162-1169 ◽  
Author(s):  
Eleonora Conterosito ◽  
Wouter Van Beek ◽  
Luca Palin ◽  
Gianluca Croce ◽  
Luana Perioli ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Organic Molecules ◽  
Double Hydroxides

Rationalization of liquid assisted grinding intercalation yields of organic molecules into layered double hydroxides by multivariate analysis

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108431-108439 ◽  
Author(s):  
E. Conterosito ◽  
M. Milanesio ◽  
L. Palin ◽  
V. Gianotti
Keyword(s):  
Multivariate Analysis ◽  
Layered Double Hydroxides ◽  
Organic Molecules ◽  
Molecular Descriptors ◽  
Layered Materials ◽  
Double Hydroxides

PCA, coupled to molecular descriptors, proved to be an effective tool to rationalize the mechanochemical intercalation yields of layered materials.

Constrainment Effects of Interleaved Organic Molecules into Layered Double Hydroxides

2004 ◽  
Vol 847 ◽  
Author(s):  
Marc Dubois ◽  
El Mostafa Moujahid ◽  
Jean-Pierre Besse ◽  
Fabrice Leroux
Keyword(s):  
Layered Double Hydroxide ◽  
Hybrid Materials ◽  
Layered Double Hydroxides ◽  
Organic Molecules ◽  
Organic Dyes ◽  
Dye Molecules ◽  
Cation Composition ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Subsequent Stabilization

ABSTRACTIncorporation and subsequent stabilization of organic molecules into layered double hydroxide are investigated. Through two types of hybrid materials, organic dyes and aniline-based monomers interleaved between LDH materials of cation composition Zn2Al and Cu2Cr respectively, it is shown that the effect of the constrainment is revealed by the interactions different according to the molecule size and stacking as exemplified by dye molecules, orange 6 and green 25 acids and two aniline-based monomers, m-amino-4-benzenesulfonic and 3-aniline-1-propanesulfonic acids.

Synthesis of p-sulfonated calix[4]arene-intercalated layered double hydroxides and their adsorption properties for organic molecules

2006 ◽  
Vol 26 (4-5) ◽  
pp. 655-659 ◽  
Author(s):  
Satoru Sasaki ◽  
Sumio Aisawa ◽  
Hidetoshi Hirahara ◽  
Akira Sasaki ◽  
Hirokazu Nakayama ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Organic Molecules ◽  
Adsorption Properties ◽  
Double Hydroxides

Acceptorless amine dehydrogenation and transamination using Pd-doped layered double hydroxides

2018 ◽  
Author(s):  
Diana Ainembabazi ◽  
Nan An ◽  
Jinesh Manayil ◽  
Kare Wilson ◽  
Adam Lee ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxidation States ◽  
Secondary Amines ◽  
Primary Amines ◽  
Acid Dissolution ◽  
Oxidative Amination ◽  
Strong Function ◽  
Excellent Activity ◽  
High Yields ◽  
Double Hydroxides

<div> <p>The synthesis, characterization, and activity of Pd-doped layered double hydroxides (Pd-LDHs) for for acceptorless amine dehydrogenation is reported. These multifunctional catalysts comprise Brønsted basic and Lewis acidic surface sites that stabilize Pd species in 0, 2+, and 4+ oxidation states. Pd speciation and corresponding cataytic performance is a strong function of metal loading. Excellent activity is observed for the oxidative transamination of primary amines and acceptorless dehydrogenation of secondary amines to secondary imines using a low Pd loading (0.5 mol%), without the need for oxidants. N-heterocycles, such as indoline, 1,2,3,4-tetrahydroquinoline, and piperidine, are dehydrogenated to the corresponding aromatics with high yields. The relative yields of secondary imines are proportional to the calculated free energy of reaction, while yields for oxidative amination correlate with the electrophilicity of primary imine intermediates. Reversible amine dehydrogenation and imine hydrogenation determine the relative imine:amine selectivity. Poisoning tests evidence that Pd-LDHs operate heterogeneously, with negligible metal leaching; catalysts can be regenerated by acid dissolution and re-precipitation.</p> </div> <br>

Antibiotic-anionic Clay Matrix Used for Drug Controlled Release

2018 ◽  
Vol 69 (2) ◽  
pp. 321-323
Author(s):  
Georgeta Zegan ◽  
Elena Mihaela Carausu ◽  
Loredana Golovcencu ◽  
Alina Sodor Botezatu ◽  
Eduard Radu Cernei ◽  
...  
Keyword(s):  
Controlled Release ◽  
Layered Double Hydroxides ◽  
Bioactive Molecules ◽  
Drug Controlled Release ◽  
Anionic Clays ◽  
Anionic Clay ◽  
Toxicological Studies ◽  
High Efficient ◽  
Clay Matrix ◽  
Double Hydroxides

Anionic clay matrix acting as drug controlled release system have shown in last years a great potential for delivery of bioactive molecules and chemical therapeutics. This organic-inorganic nanohybrid system is high efficient offering an excellent protection of intercalated compounds from degradation. Compared to other nanoparticles used in medical area, anionic clays type layered double hydroxides have found to be biocompatible according to toxicological studies. Ampicillin containing MgAlLDHs and ZnAlLDH samples have been prepared following two routes: anion-exchange procedure and reconstruction from calcined layered double hydroxides. Solid samples have been characterized by FTIR and SEM-EDX highlighting the alteration of pristine LDHs structure when the antibiotic is introduced in the interlayer gallery.

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