Molecularly Imprinted Mesoporous Organosilica

Lofgreen, Jennifer E.; Moudrakovski, Igor L.; Ozin, Geoffrey A.

doi:10.1021/nn1035697

Cited by 87 publications

(66 citation statements)

References 26 publications

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“…2a, the broad hysteresis in the isotherm of MIMS-2 indicates a less ordered mesoporous material with a smaller pore size (4.8 nm) than that of PMS (5.1 nm). This is in accordance with the trend of imprinted mesoporous silica reported by Lofgreen et al [12]. NIMS was made by pre-hydrolysis solgel process to avoid the interruption of the amino groups from the silica matrix to the surfactant template [19].…”

Section: Nitrogen Adsorption/desorption Characterizationsupporting

confidence: 89%

“…The template precursors of 2-naphthol (1) and 2,7-dihydroxylnaphthalene (2) were prepared according to published procedure [12]. Phenol moieties were reacted with a stoichiometric amount of (3-isocyanatopropyl) Molecularly imprinted mesoporous silicates (MIMSs) were prepared by a triblock-copolymer-templated solgel method.…”

Section: Synthesismentioning

confidence: 99%

“…Jung et al first reported the plausible adsorption properties of molecularly imprinted mesoporous silica [11]. Ozin et al confirmed the imprinted sites in the silica matrix and the selectivity of imprinted mesoporous material to template molecule over its analogues [12].…”

Section: Introductionmentioning

confidence: 99%

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Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol

Luoa

Wang

et al. 2015

Open Chemistry

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Abstract:Dummy molecularly imprinted mesoporous silicates (MIMS-2) were made by co-condensation of tetraethyl orthosilicate (TEOS) with precursors of bi-functional mimic of 2-naphthol, 2,7-dihydroxynaphthalene, around triblock copolymer surfactant Pluronic (P123) micelles. The bi-functional template was linked to two functional monomers through thermally cleavable covalent bonds to generate imprint precursor. This provides the possibility of incorporating the target into the cross-linked mesoporous silicate matrix in the non-ionic surfactant templated sol-gel process. P123 was eluted by ethanol extraction and template molecules were removed by refluxing the materials in a mixture of dimethyl sulfoxide (DMSO) and water. MIMS-1 was prepared similarly except that 2-naphthol was used as template instead of 2,7-dihydroxynaphthalene. Solid phase extraction studies showed that MIMS-2 exhibited good retention and selectivity for 2-naphthol among its structural analogues. The mono-functional molecule 2-naphthol was unable to be incorporated into the silica matrix of mesoporous material by the identical method, and the resulting material MIMS-1 exhibits poor selectivity to the template analogues.

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Section: Nitrogen Adsorption/desorption Characterizationsupporting

confidence: 89%

Section: Synthesismentioning

confidence: 99%

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Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol

Luoa

Wang

et al. 2015

Open Chemistry

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“…60 Studies of sensing and imprinting using PMOs have been reported by several researchers for the removal of organic molecules and metal ions. [61][62][63][64][65][66][67] Riley and co-workers 61 prepared a PMO material with imprinted sites for selective benzene adsorption. They compared their results with those obtained from non-imprinted adsorbents to highlight the importance of the imprinting effect.…”

Section: Pmo Materials As Hosts For Drug and Biomoleculesmentioning

confidence: 99%

Periodic mesoporous organosilicas for advanced applications

2014

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In 1999, three groups independently developed a novel class of organic-inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). The organic functional groups in the frameworks of these solids allow tuning of the surface properties and modification of the bulk properties of the material. This paper provides a comprehensive overview of PMOs and discusses their different functionalities, morphology and applications, such as catalysis, drug delivery, sensing, optics, electronic devices, environmental applications (gas sensing and gas adsorption), biomolecule adsorption and chromatography for which PMOs have been used over the past 5 years.

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“…3-Isocyanatopropyltriethoxysilane (IPTES), APTES and pluronic P123 (EO 20 PO 70 EO 20 , MW ¼ 5800 Da) were purchased from Sigma Chemical Co., St. Louis. All other chemicals used were of analytical grade.…”

Section: Chemicals and Materialsmentioning

confidence: 99%

Synthesis of hexagonal mesoporous silicates functionalized with amino groups in the pore channels by a co-condensation approach

Xiong

Wang

et al. 2016

RSC Adv.

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a Mesoporous silicates functionalized with amino groups in the pore channels have been made by the cocondensation of tetraethoxyl siloxide (TEOS) with precursors of P-Si through a triblock copolymertemplated sol-gel process under acidic conditions. Poly(alkylene oxide) block copolymer (P123) was eluted by ethanol extraction and template molecules were removed by refluxing the materials in a mixture of DMSO and water. The resulting materials were characterized in detail by FT-IR, XRD, TEM and N 2 adsorption, in order to study the effect of the precursors on the mesoscopic order and pore structure. Evidence of amino groups located in the pore channels was shown through variation of pore size and BET surface area after the amino groups were coupled with benzaldehyde, and TEM images of materials after staining with RuO 4 . Finally, a comparative study of the catalytic performance of materials SBA-Am-10 and SBA-T-10, obtained by two methods, revealed that the catalyst synthesized by our method gave rapid reaction speed and high yields of flavanone by the Claisen-Schmidt condensation of benzaldehyde and 2 0 -hydroxyacetophenone.

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Molecularly Imprinted Mesoporous Organosilica

Cited by 87 publications

References 26 publications

Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol

Dummy molecularly imprinted mesoporous silicates for selective adsorption of 2-naphthol

Periodic mesoporous organosilicas for advanced applications

Synthesis of hexagonal mesoporous silicates functionalized with amino groups in the pore channels by a co-condensation approach

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