Classical Keggin Intercalated into Layered Double Hydroxides: Facile Preparation and Catalytic Efficiency in Knoevenagel Condensation Reactions

Chemistry : a European Journal
Yueqing JiaYu-Fei Song

Abstract

The family of polyoxometalate (POM) intercalated layered double hydroxide (LDH) composite materials has shown great promise for the design of functional materials with numerous applications. It is known that intercalation of the classical Keggin polyoxometalate (POM) of [PW12 O40 ](3-) (PW12 ) into layered double hydroxides (LDHs) is very unlikely to take place by conventional ion exchange methods due to spatial and geometrical restrictions. In this paper, such an intercalated compound of Mg0.73 Al0.22 (OH)2 [PW12 O40 ]0.04 ⋅0.98 H2 O (Mg3 Al-PW12 ) has been successfully obtained by applying a spontaneous flocculation method. The Mg3 Al-PW12 has been fully characterized by using a wide range of methods (XRD, SEM, TEM, XPS, EDX, XPS, FT-IR, NMR, BET). XRD patterns of Mg3 Al-PW12 exhibit no impurity phase usually observed next to the (003) diffraction peak. Subsequent application of the Mg3 Al-PW12 as catalyst in Knoevenagel condensation reactions of various aldehydes and ketones with Z-CH2 -Z' type substrates (ethyl cyanoacetate and malononitrile) at 60 °C in mixed solvents (V2-propanol :Vwater =2:1) demonstrated highly efficient catalytic activity. The synergistic effect between the acidic and basic sites of the Mg3 Al-PW12 com...Continue Reading

References

Feb 19, 2002·Chemical Reviews·JoAnne Stubbe, Wilfred A. van Der Donk
Feb 20, 2002·Chemical Reviews·Dimitris E. Katsoulis
Feb 5, 2010·Angewandte Chemie·De-Liang LongLeroy Cronin
Feb 6, 2010·Journal of the American Chemical Society·Valentin RodionovJean M J Fréchet
May 24, 2011·Physical Chemistry Chemical Physics : PCCP·Enrica GianottiAvelino Corma
Oct 15, 2011·Advanced Materials·Minoru Osada, Takayoshi Sasaki
Apr 14, 2012·Chemical Communications : Chem Comm·Chenguang Yu, Jing He
Jun 15, 2012·Chemical Society Reviews·May Nyman, Peter C Burns
Jul 12, 2012·Chemical Society Reviews·Anna ProustGuillaume Izzet
Jul 14, 2012·Chemical Communications : Chem Comm·Kosei SugaharaNoritaka Mizuno
Aug 2, 2012·Chemical Society Reviews·Yu-Fei Song, Ryo Tsunashima
Aug 4, 2012·Chemical Society Reviews·Haralampos N MirasLeroy Cronin
Sep 14, 2012·Chemical Society Reviews·Hongjin LvCraig L Hill
Jun 10, 2014·Chemical Communications : Chem Comm·Andrey SeliverstovCarsten Streb
Sep 6, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Yang ChenYu-Fei Song
Jan 28, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Benjamin Schwarz, Carsten Streb

❮ Previous
Next ❯

Citations

Nov 30, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Yanqi XuYu-Fei Song
Sep 22, 2017·Acta Crystallographica. Section E, Crystallographic Communications·Brian Castro AgudeloCesar A Sierra
Nov 23, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jian-Cai LiuYu-Fei Song
Dec 1, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Tengfei LiYu-Fei Song

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.