Synthesis and characterization of mesoporous silica modified with chiral auxiliaries for their potential application as chiral stationary phase

Mayani, Vishal J.; Abdi, Sayed H. R.; Kureshy, Rukhsana I.; Khan, Noor‐ul H.; Agrawal, Santosh; Jasra, Raksh V.

doi:10.1016/j.chroma.2008.02.041

Cited by 25 publications

(17 citation statements)

References 42 publications

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“…Silica-based mesoporous inorganic/organic hybrid materials [21,22] are a new type of material characterized by large specific surface areas and pore size (2-15 nm), which are obtained through the coupling of inorganic and organic components by postsynthesis. Besides adsorption, the incorporation of functionalities enables the materials to be used in lots of other fields such as catalysis, chromatography, molecular switches and the construction of systems for controlling the release of active compounds [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Adsorption behavior of phosphate on lanthanum(III)-coordinated diamino-functionalized 3D hybrid mesoporous silicates material

Zhang

Shen

Shan

et al. 2011

Journal of Hazardous Materials

153

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Section: Introductionmentioning

confidence: 99%

Adsorption behavior of phosphate on lanthanum(III)-coordinated diamino-functionalized 3D hybrid mesoporous silicates material

Zhang

Shen

Shan

et al. 2011

Journal of Hazardous Materials

153

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“…SBA‐15 was synthesised using a hydrothermal crystallisation method, as described previously (Zhao et al, 1998a, b; Mayani et al, 2008). The Co/SBA‐15 sample was prepared by a wet impregnation method using Co(NO 3 ) 2 ·6H 2 O as the cobalt precursor, and the Ni/SBA‐15 sample was prepared using Ni(NO 3 ) 2 ·6H 2 O as a nickel precursor.…”

Section: Methodsmentioning

confidence: 99%

Decomposition of 2‐chlorophenol, 4‐chlorophenol and 2,4,6‐trichlorophenol by catalytic oxidation over cobalt and nickel impregnated SBA‐15

Mayani

Kim

2012

Can J Chem Eng

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This work describes the use of Co(II) and Ni(II) impregnated SBA‐15 as catalysts for the oxidative degradation of a few persistent chlorinated phenols in an aqueous medium: 2‐chlorophenol (2‐CP), 4‐chlorophenol (4‐CP) and 2,4,6‐trichlorophenol (2,4,6‐TCP). The catalysts were characterised in terms of their crystallographic features, surface topography, functional groups, thermal stability, etc. The oxidation reactions were carried out using the reaction time, concentration of chlorophenol, amount of catalyst and pH of the reaction mixture as the process variables with or without hydrogen peroxide as the chemical oxidising agent. The conversion achieved with Co/SBA‐15 for 2‐CP, 4‐CP and 2,4,6‐TCP was respectively 84.7%, 78.4% and 64.8% with H2O2 and 86.3%, 80.2% and 70.3% in the absence of H2O2. The conversion with Ni/SBA‐15 also at 353 K for 2‐CP, 4‐CP and 2,4,6‐TCP was, respectively, 82.3%, 81.9% and 64.0% at 5 h with H2O2 and 89.5%, 82.9% and 65.6% without H2O2. The reactions followed pseudo‐first‐order kinetics. The leachability study indicated that the catalysts release very little Co and Ni to water. Therefore, the possibility of water contamination through metal leaching was almost negligible. Oxidative degradation was confirmed by measuring the total organic carbon. © 2012 Canadian Society for Chemical Engineering

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“…Jacobs et al reported the preparation of MCM-41 and MCM-48 materials functionalized with chiral selector (R)-naphthylethylamine as supports in chiral HPLC (Thoelen et al 1999(Thoelen et al , 2000. Jasra et al also reported the syntheses of other chiral porous materials, MCM-41 and SBA-15 modified with chiral ligands, and the potential application to chiral SP (Mayani et al 2006(Mayani et al , 2008. Recently, Mastai et al reported the preparation of templating mesoporous silica with chiral block copolymers and its application for enantioselective separation (Gabashvili et al 2007).…”

Section: Introductionmentioning

confidence: 95%

Synthesis of chiral mesoporous silica and its potential application to asymmetric separation

et al. 2010

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Chiral mesoporous silica (CMS) has been successfully synthesized in the presence of basic amino acids; the use of basic amino acids in combination with the chiral anionic surfactant is advantageous for the formation of CMS in terms of uniformity in the twisted morphology. We first demonstrate that thus obtained chiral mesoporous silicas can be used for the enantioselective separation of racemic compounds; the helical rod-shaped CMS is found to be capable of asymmetric separation of racemic N-trifluoroacetylalanine ethyl ester (CF 3 CO-Ala-OEt). The left handedness-rich CMS shows asymmetric preferential adsorption of the L isomer and vice versa.

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Synthesis and characterization of mesoporous silica modified with chiral auxiliaries for their potential application as chiral stationary phase

Cited by 25 publications

References 42 publications

Adsorption behavior of phosphate on lanthanum(III)-coordinated diamino-functionalized 3D hybrid mesoporous silicates material

Adsorption behavior of phosphate on lanthanum(III)-coordinated diamino-functionalized 3D hybrid mesoporous silicates material

Decomposition of 2‐chlorophenol, 4‐chlorophenol and 2,4,6‐trichlorophenol by catalytic oxidation over cobalt and nickel impregnated SBA‐15

Synthesis of chiral mesoporous silica and its potential application to asymmetric separation

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