Chemistry in Confining Reaction Fields with Special Emphasis on Nanoporous Materials

Polarz, Sebastian; Kuschel, Andreas

doi:10.1002/chem.200800674

Cited by 53 publications

(58 citation statements)

References 178 publications

(134 reference statements)

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“…1). The use of mesoporous silica materials as confining reaction fields would be one way to achieve this goal [6]. However, it was found that the conversion of Zn 2?…”

Section: Introductionmentioning

confidence: 99%

Dynamical Changes in the Cu–ZnO x Interaction Observed in a Model Methanol Synthesis Catalyst

et al. 2008

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A systematic series of model methanol synthesis catalysts was prepared by sequential impregnation of a mesoporous silica material (5 nm average pore size) with an organometallic ZnO precursor which is liquid at room temperature, followed by the infiltration with an aqueous Cu nitrate solution. These catalysts, which contained 14-20 wt.% Cu and 1-5 wt.% Zn, were characterized by N 2 O reactive chemisorption, by EXAFS and by measuring their methanol synthesis activities. It was observed that the formation of confined, nanocrystalline ZnO prior to copper infiltration is of major importance for the development of catalyst activity. Severe reduction of properly prepared catalysts (10% CO/H 2 , 673 K, 15 min) leads to the emergence of a new feature in the ZnK EXAFS spectrum which was assigned to a Cu neighbour by combined evidence from the ZnK EXAFS and XANES regions. The zinc oxide component was partially reduced as well, but Zn(0) was not formed to any significant extent. Catalysts which developed this Cu-Zn 2? interaction under severe reduction were superior in terms of methanol synthesis rate per m 2 Cu surface area to a sample which did not exhibit this feature.

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“…1). The use of mesoporous silica materials as confining reaction fields would be one way to achieve this goal [6]. However, it was found that the conversion of Zn 2?…”

Section: Introductionmentioning

confidence: 99%

Dynamical Changes in the Cu–ZnO x Interaction Observed in a Model Methanol Synthesis Catalyst

et al. 2008

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“…[5][6][7][8][9][10] It did not take long to realize that the new dimension of the well ordered pores could lead to entirely new types of applications. Mesoporous silicas were used, for example, to catalyze the formation of conductive polymers within their pores, [11][12][13][14][15] or 30 even as templates for some of the first synthetic procedures of conductive carbon nanowires. 16 Synthetic mesoporous silicas were also proposed for environmental remediation: upon functionalization with mercaptopropyl groups, the materials proved to be able to remove heavy metals from water.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous silica nanoparticles: structural design and applications

et al. 2010

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The structural properties of mesoporous silica nanoparticles are reviewed. Different strategies for the introduction of functional groups are considered. Based on the architectural features of the material, the functionalization at defined regions of the particles is described, along with the properties emerging from the corresponding site-specific modifications of their chemistry. Many applications derived from the unique architecture and chemistry of these nanostructured composite materials are shown. Disciplines Materials Chemistry | Other Chemistry CommentsThis a manuscript of an article from the Journal of Materials Chemistry 20 (2010) The structural properties of mesoporous silica nanoparticles are reviewed. Different strategies for the introduction of functional groups are considered. Based on the architectural features of the material, the functionalization at defined regions of the particles is described, along with the properties emerging from the corresponding site-specific modifications of their chemistry. Many 10 applications derived from the unique architecture and chemistry of these nanostructured composite materials are shown.

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“…The advantage of this methodology is that the entire range of derivatization chemistry known for halogenated aromatic compounds can now be applied in the field of PMOs [36]. Different functional groups can thus be attached by a second modification reaction on the bromobenzene functional groups in the pore walls.…”

Section: Resultsmentioning

confidence: 99%

Is their potential for post-synthetic brominating reactions on benzene bridged PMOs?

Smeulders

Meynen

Houthoofd

et al. 2012

Microporous and Mesoporous Materials

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Chemistry in Confining Reaction Fields with Special Emphasis on Nanoporous Materials

Cited by 53 publications

References 178 publications

Dynamical Changes in the Cu–ZnO x Interaction Observed in a Model Methanol Synthesis Catalyst

Dynamical Changes in the Cu–ZnO x Interaction Observed in a Model Methanol Synthesis Catalyst

Mesoporous silica nanoparticles: structural design and applications

Is their potential for post-synthetic brominating reactions on benzene bridged PMOs?

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