Amine-Functionalized Periodic Mesoporous Organosilicas

Burleigh, Mark C.; Markowitz, Michael A.; Spector, Mark S.; Gaber, Bruce P.

doi:10.1021/cm0105763

Cited by 154 publications

(106 citation statements)

References 29 publications

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“…The cocondensation method involves the synthesis and functionalization in a unique step, for instance the organosilanes are added during the synthesis stage together with the silica source [24,61,63,69,70]. The surfactant removal is carried out by ion exchange using either an ethanolic solution of ammonium nitrate [71] or hydrochloric acid [72,73]. This easy synthetic procedure leads to MSNPs displaying uniform distribution of functional groups.…”

Section: Their Applications As Drug Delivery Systemsmentioning

confidence: 99%

Mesoporous Silica Nanoparticles: Their Projection in Nanomedicine

Vallet‐Regí

2012

ISRN Materials Science

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Mesoporous silica nanoparticles are receiving growing attention by the scientific biomedical community. Among the different types of inorganic nanomaterials, mesoporous silica nanoparticles have emerged as promising multifunctional platforms for nanomedicine. Since their introduction in the drug delivery landscape in 2001, mesoporous materials for drug delivery are receiving growing scientific interest for their potential applications in the biotechnology and nanomedicine fields. The ceramic matrix efficiently protects entrapped guest molecules against enzymatic degradation or denaturation induced by pH and temperature as no swelling or porosity changes take place as a response to variations in the surrounding medium. It is possible to load huge amounts of cargo into the mesopore voids and capping the pore entrances with different nanogates. The application of a stimulus provokes the nanocap removal and triggers the departure of the cargo. This strategy permits the design of stimuliresponsive drug delivery nanodevices.

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Section: Their Applications As Drug Delivery Systemsmentioning

confidence: 99%

Mesoporous Silica Nanoparticles: Their Projection in Nanomedicine

Vallet‐Regí

2012

ISRN Materials Science

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“…Then, the regular pore network of MCM-48 provides more favorable mass transfer kinetics than the unidirectional pore system of MCM-41 leading to a perfect reactor for the synthesis of nanocomposites. Modification with ligands, such as amines, carbonates and organosulfides, on the surface of mesoporous materials is necessary to obtain specific adsorption and larger capacity [20,21]. Silanol groups and amino groups are effective for the adsorption of organic compounds due to their high adsorption energy or potential charge association.…”

Section: Introductionmentioning

confidence: 99%

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Anbia

Khoshbooei

2014

J Nanostruct Chem

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A novel adsorbent with magnetic Fe 3 O 4 nanoparticles and melamine-based dendrimer amine functionalized mesoporous silica (MDA-magMCM-48) has been developed which would not destroy the pore structure and could supply a convenient way for separation of the adsorbent from water. The obtained adsorbent was characterized by XRD, SEM, TEM, FTIR, TGA and N 2 adsorptiondesorption isotherm. The objective of this study was to evaluate the effectiveness of mesoporous MDA-magMCM-48 material for the sorption of 4-chlorophenol (4-CP) and 4-bromophenol (4-BP). The effects of various operating parameters such as initial concentration, pH of the solution and contact time were thoroughly studied. From the sorption studies it is observed that the uptake of 4-CP (239.55 mg/g) was higher than that of 4-BP (222.9 mg/g). The Freundlich and Langmuir adsorption isotherms are used to model the equilibrium adsorption data.

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“…These studies have been widely revised by Moller and Bein [26]. Organic functionalization of the internal surface of a MTS host by covalently grafting various organic species into the channel walls, a post synthesis grafting process, has been widely employed to anchor specific organic groups onto surface silanols, typically using organochlorosilanes or organoalkoxysilanes as precursors for the surface modifications [26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

Kaftan

Açıkel

Eroğlu

et al. 2005

Analytica Chimica Acta

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A novel sorbent was prepared by the functionalization of an inorganic support material, MCM-41, with N-methylglucamine for the uptake of boron from aqueous solutions prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Characterization of the newly synthesized material was performed using BET, XRD, TEM, SEM and DRIFTS techniques, in addition to its C and N elemental content. Sorption behavior of the novel sorbent for boron was also investigated and found to obey Freundlich and Dubinin-Radushkevich (D-R) isotherm models. The maximum amount of B (as H 3 BO 3 ) that can be sorbed by the sorbent was calculated from the D-R isotherm and was found to be 0.8 mmol B g −1 of sorbent. The applicability of the new sorbent for the removal/preconcentration of boron from aqueous samples was examined by batch method. It was found that the sorbent can take up 85% of boron in 5 min whereas quantitative sorption is obtained in 30 min. Any pH greater than 6 can be used for sorption. Desorption from the sorbent was carried out using 1.0 M HNO 3 . The sorption efficiency of the new sorbent was also compared to that of Amberlite IRA 743, a commercial resin with N-methylglucamine functional groups. Within the experimental conditions employed, the new sorbent was found to have higher sorption efficiency than the commercial resin. For method validation, spike recovery tests were performed at various concentration levels in different water types and were found to be between 83-95 and 75-92% for ultra pure water and geothermal water, respectively.

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Amine-Functionalized Periodic Mesoporous Organosilicas

Cited by 154 publications

References 29 publications

Mesoporous Silica Nanoparticles: Their Projection in Nanomedicine

Mesoporous Silica Nanoparticles: Their Projection in Nanomedicine

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal/preconcentration of boron from waters

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