Boehmite silica sulfuric acid: as a new acidic material and reusable heterogeneous nanocatalyst for the various organic oxidation reactions

Seydyosefi

Tahmasbi

2018

Applied Organom Chemis

Self Cite

Boehmite nanoparticles were prepared by a simple and inexpensive procedure in water using commercially available materials without inert atmosphere. Then, the surface of the boehmite nanoparticles was modified using 3‐mercaptopropyltrimethoxysilane and subsequently zirconium oxide was supported on the modified surface. Zirconium oxide supported on boehmite nanoparticles (Pr.S‐ZrO@boehmite) was characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and inductively coupled plasma technique. The catalytic application of Pr.S‐ZrO@boehmite was studied in C–O and C–S coupling reactions for synthesis of valuable compounds such as ether and sulfide derivatives. All products were obtained in good to excellent yields and the catalyst could be recovered and reused several times without significant loss of catalytic efficiency. Furthermore, zirconium oxide is rarely used as catalyst for cross‐coupling reactions.

Section: Introductionmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 98%

Zirconium oxide complex anchored on boehmite nanoparticles as highly reusable organometallic catalyst for C–S and C–O coupling reactions

Seydyosefi

Tahmasbi

2018

Applied Organom Chemis

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“…FT‐IR spectrums of BNPs, 3‐CPTMS@BNPs, TEDETA@BNPs and Cu I ‐TEDETA@BNPs are shown in Figure . The strong bands adsorption above 3000 cm −1 are due to symmetrical and asymmetrical stretching vibrations of surface hydroxyl groups . The adsorption bands at (1630) and (1174 and 1075) cm −1 are corresponded to nitrate impurity and hydrogen bands respectively .…”

Section: Resultsmentioning

confidence: 99%

“…Boehmite nanoparticles have high specific surface area including high density of hydroxyl groups on its surface, while it is inert in various chemical conditions . More addition, boehmite nanoparticles can be prepared in water using commercial available materials such as aluminum nitrate and sodium hydroxide, therefore boehmite is very inexpensive and easy available . These unique properties of boehmite led that it can be used as ideal support for heterogenization of homogeneous catalysts .…”

Section: Introductionmentioning

confidence: 99%

“…[29][30][31][32][33] More addition, boehmite nanoparticles can be prepared in water using commercial available materials such as aluminum nitrate and sodium hydroxide, therefore boehmite is very inexpensive and easy available. [34][35][36] These unique properties of boehmite led that it can be used as ideal support for heterogenization of homogeneous catalysts. [37][38][39] Several methods have been reported for the preparation of boehmite nanoparticles and the effect of different condition on its morphologies, chemical and physical properties has been studied.…”

Section: Introductionmentioning

confidence: 99%

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New Complex of Copper on Boehmite Nanoparticles as Highly Efficient and Reusable Nanocatalyst for Synthesis of Sulfides and Ethers

Heidarnezhad

Tahmasbi

2019

ChemistrySelect

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Boehmite is a cubic orthorhombic structure of aluminum oxide hydroxide, which prepared via addition of sodium hydroxide solution to an aluminum nitrate solution at room temperature. In this work, the surface of boehmite nanoparticles (BNPs) modified by 3‐choloropropyltrimtoxysilane (3‐CPTMS), then reacted with N,N,N′,N′‐tetraethyldiethylentriamine (TEDETA). Eventually, CuI immobilized on modified boehmite (CuI‐TEDETA@BNPs). Structure of this catalyst was characterized using FT‐IR, TEM, SEM, EDS, TGA, and AAS techniques. Finally, the catalytic activity of CuI‐TEDETA@BNPs was studied for the synthesis of ethers and sulfides. All ethers and sulfides were obtained in high yields, which reveals the high activity of described catalyst. This catalyst was reused for several times without significant loss of its catalytic efficiency. Recovered catalyst was characterized by SEM and FT‐IR techniques, which shown a good agreement with fresh catalyst. Also, heterogeneity and stability of CuI‐TEDETA@BNPs confirmed by hot filtration test.

Fe₃O₄@S‐ABENZ@VO: Magnetically separable nanocatalyst for the efficient, selective and mild oxidation of sulfides and oxidative coupling of thiols

Rezaei

Badri

et al. 2017

Applied Organom Chemis

Self Cite

Oxovanadium(IV) immobilized on Fe3O4@S‐ABEN is reported as a highly efficient nanocatalyst for the oxidation of sulfides and oxidative coupling of thiols (using H2O2 as green oxidant), the products of which are obtained in high to excellent yields. The products can be separated by a simple extraction with organic solvent and the catalyst is highly efficient, especially in terms of selectivity of desired product. The catalytic system can be recycled and reused without significant loss of catalytic activity.