Triblock copolymer assisted synthesis of periodic mesoporous organosilicas (PMOs) with large pores

Muth, Olaf; Schellbach, Carsten; Fröba, Michael

doi:10.1039/b106636f

Cited by 180 publications

(167 citation statements)

References 12 publications

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“…30 In another development, the detailed synthesis of ethane-linked mesoporous organosilicas under acidic conditions were reported in the presence of biodegradable Brij-56 [(EO) 10 31,32 Fröba et al used neutral Pluronic P123 triblock copolymer as the structure directing agent and BTME as the organosilica source under acidic conditions. 33 Their materials exhibited hexagonal symmetry akin to SBA-15 silica with large pores (6.5 nm). Likewise, Burleigh et al were able to enlarge the pore sizes ranging from 6 to 20 nm using the same triblock copolymer surfactant along with a trimethylbenzene micelle-swelling agent under acidic conditions.…”

Section: Organic-bridged Periodic Mesoporous Organosilicasmentioning

confidence: 99%

Highly Ordered Mesoporous Organosilica Hybrid Materials

Kapoor¹,

Inagaki²

2006

Bulletin of the Chemical Society of Japan

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The latest developments in periodic mesoporous organosilicas (PMO) have been compiled. The discovery of mesoporous hybrid organosilicas with molecular scale periodicity resulting from alternating hydrophilic and hydrophobic layers, and a cost effective solution showing the use of allyl derivatives of the bis-silyl precursors are discussed. Relevant uses of the periodic mesoporous materials in diverse applications are summarized. For example, the metal-incorporated periodic mesoporous organic frameworks are likely to offer an advantage in catalytic transformations, while the functionalized PMOs show promise in fascinating catalytic applications via enhancing the physical properties of guest molecules and clusters. In general, the advancement in PMOs have showed great promise and are expected to deliver exciting achievable future findings.

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Section: Organic-bridged Periodic Mesoporous Organosilicasmentioning

confidence: 99%

Highly Ordered Mesoporous Organosilica Hybrid Materials

Kapoor¹,

Inagaki²

2006

Bulletin of the Chemical Society of Japan

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“…To further increase the pore size beyond 5 nm, limited by the utmost practicable chain lengths in the case of cationic surfactants, triblock copolymers such as P123, F127 (EO 106 PO 70 EO 106 ), or B50 -6600 are usually used as SDAs under acidic conditions. For ethanebridged PMO materials, the typical pore size is 6.5 and 7.7 nm with 2-D hexagonal mesostructure using P123 as an SDA via the cooperative assembly 18 and the TLCT approach,…”

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confidence: 99%

Periodic Mesoporous Organosilicas

Yao

Zhao

2005

Encyclopedia of Inorganic Chemistry

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Periodic mesoporous organosilicas (PMOs) represent a promising new class of organic–inorganic nanocomposite materials in which the organic and inorganic moieties are covalently linked and homogeneously distributed at molecular level. This review retrospected the discovery and development of PMOs in terms of rational synthesis based on the concept of supramolecular self‐assembly. The main focus is on precursors and crystal‐like PMOs. We also highlight the recent achievements regarding compositions and mesostructures, morphologies, and applications in the field. Furthermore, we present an outlook about the promising future perspectives of PMOs that result from the latest developments.

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“…PMOs have attracted much attention because new catalytic and adsorptive functions can be assigned to them by introducing various organic groups directly bonded to the silica host. [7][8][9][10][11][12][13][14][15][16][17][18] PMOs can be crystallized to single crystal-like uniform particles, whilst purely inorganic mesoporous silica materials usually have no definite shape. In addition, a large fraction of organic component in its composition can also prove useful in controlling hydrophobicity needed for the adsorption of non-polar organic molecules in chromatography or in liquid phase organic reactions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Periodic Mesoporous Organosilica by Microwave Heating

Yoon¹,

Son²,

Biswas³

et al. 2008

Bulletin of the Korean Chemical Society

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A periodic mesoporous organosilica material was synthesized by microwave heating (PMO-M) using 1,2-bis(trimethoxysilyl)ethane as a precursor in a cationic surfactant solution, and textural properties were compared with those of the product produced by conventional convection heating (PMO-C). These synthesized materials were characterized using XRD, TEM/SEM, N2 adsorption isotherm, 29 Si and 13 C NMR, and TGA, which confirmed their good structural orders and clear arrangements of uniform 3D-channels. Synthesis time was reduced from 21 h in PMO-C to 2-4 h in PMO-M. PMO-M was made of spherical particles of 1.5-2.2 μm size, whereas PMO-C was made of decaoctahedron-shaped particles of ca. 8.0 μm size. Effect of synthesis temperature, time, and heating mode on the PMO particle morphology was examined. The particle size of PMO-M could be controlled by changing the heating rate by adjusting microwave power level. PMO-M demonstrated improved separation of selected organic compounds compared to PMO-C in a reversed phase HPLC experiment. Ti-grafted PMO-M also resulted in higher conversion in liquid phase cyclohexene epoxidation than by Ti-PMO-C.

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Triblock copolymer assisted synthesis of periodic mesoporous organosilicas (PMOs) with large pores

Abstract: Periodic mesoporous organosilicas (PMOs) with unusually large pores and high BET surface areas have been synthesized using triblock PEO-PPO-PEO copolymer P123 as the structure-directing agent and 1,2-bis(trimethoxysilyl)ethane (BTME) as the organically bridged silica source.

Cited by 180 publications

References 12 publications

Highly Ordered Mesoporous Organosilica Hybrid Materials

Highly Ordered Mesoporous Organosilica Hybrid Materials

Periodic Mesoporous Organosilicas

Synthesis of Periodic Mesoporous Organosilica by Microwave Heating

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