Organization of Bridging Organics in Periodic Mesoporous Organosilicas (PMOs)—Polarization Micro‐Raman Spectroscopy

Dag, Ömer; Ozin, Geoffrey A.

doi:10.1002/1521-4095(200108)13:15<1182::aid-adma1182>3.0.co;2-#

Cited by 19 publications

(10 citation statements)

References 36 publications

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“…This makes them also very interesting for certain sensor applications. So far, thiophene-bridged PMOs have been synthesized only with low molecular weight surfactants, and the obtained products exhibited lower structural order accompanied by small pores. ,, …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Highly Ordered Thiophene-Bridged Periodic Mesoporous Organosilicas with Large Pores

2005

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The first example of a highly ordered periodic mesoporous thiophene-bridged organosilica (PMO) with large pores is reported. The synthesis was carried out under acidic conditions using a polyalkylene oxide triblock copolymer (Pluronic P123) as supramolecular structure-directing agent. Materials with pore sizes between 5 and 6 nm and specific surface areas in the range of 400-550 m 2 /g were obtained.The analysis of the TG/MS data demonstrates a relatively high thermal stability (up to 400 °C in air) of the mesoporous organosilica before a decomposition of the organic moieties occurs.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Highly Ordered Thiophene-Bridged Periodic Mesoporous Organosilicas with Large Pores

2005

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“…In this case, residual soluble species should be infiltrated for the construction of resultant frameworks with sufficient density around surfactant assemblies. According to this significant account, further morphological designs of ordered mesoporous materials from clear precursor solutions, [44][45][46][47][48][49][50] occasionally from concentrated solutions containing organic copolymer colloids, [51,52] will be achievable for practical applications based on their highly porous nature, leading to high performance in a wide variety of advanced devices.…”

Section: Spray-drying Temperature [8c]mentioning

confidence: 99%

General Information to Obtain Spherical Particles with Ordered Mesoporous Structures

Kimura¹,

Yamauchi²

2012

Chemistry An Asian Journal

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Conditions for the synthesis of aluminum organophosphonate (AOP) and aluminophosphate (AlPO) spheres containing periodic mesopores were optimized and demonstrated to be general morphological controls for the surfactant-assisted synthesis of mesoporous materials. High-quality AOP and AlPO spheres with uniform mesopores were obtained at low and high temperatures, respectively. The aerosol-assisted synthesis of materials with uniform mesopores was categorized by using the difference in relative density of soluble AOP and AlPO oligomers that interact with ethylene oxide (EO) units in EO(n)PO(m)EO(n) triblock copolymer (PO=propylene oxide). Then, ordered mesoporous structures are constructed with the adequate amount of species in resultant frameworks, and the number of interactive points in soluble species determines the resultant density of the frameworks after self-assembly. Consequently, temperature-dependent synthesis, which allows controlled infiltration of soluble species to match the density of resultant frameworks, is required for the formation of ordered mesoporous structures under morphological control.

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“…Self-assembled periodic silicates are mostly prepared by using silicic acid and quaternary ammonium surfactants. , In addition to pure silicates, several groups investigated the use of hybrid silanes and bridged organic silsesquioxanes to prepare functional nanoporous materials. − For example, Inagaki et al prepared well-defined hybrid mesoporous crystals using 1,2-bis(trimethoxysilyl)ethane (BTME) as a silica source and cetyltrimethylammonium chloride (CTAC) as a surfactant . In this work, we use a similar hybrid organic silane (BTME) along with CTAC to grow large ordered arrays of hybrid silicate crystals on patterned substrates.…”

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confidence: 99%

Shape-Selective Growth, Patterning, and Alignment of Cubic Nanostructured Crystals via Self-Assembly

Tian

et al. 2003

Nano Lett.

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This paper reports the preparation of cubically ordered, self-assembled nanostructural crystals on micropatterned surfaces. Large ordered arrays of octahedral crystals were formed on substrates with triangular-shaped micropatterns that match the shape of the {111} surface morphology of the crystals. Many crystals became self-aligned in X, Y, and Z orientations through the interaction with the matching micropatterns. However, line micropatterns did not produce such well-defined crystals and crystal alignment. This work is among the first examples to show 3D crystal alignment independent of the long rodlike micellar structure that is characteristic of the hexagonal phases. Significantly, it also suggests that the geometry of the underline patterns has a large effect on the crystal morphology and orientation. We hope that these results will be helpful in developing microdevices based on self-assembled nanoscale materials.

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Organization of Bridging Organics in Periodic Mesoporous Organosilicas (PMOs)—Polarization Micro‐Raman Spectroscopy

Cited by 19 publications

References 36 publications

Synthesis and Characterization of Highly Ordered Thiophene-Bridged Periodic Mesoporous Organosilicas with Large Pores

Synthesis and Characterization of Highly Ordered Thiophene-Bridged Periodic Mesoporous Organosilicas with Large Pores

General Information to Obtain Spherical Particles with Ordered Mesoporous Structures

Shape-Selective Growth, Patterning, and Alignment of Cubic Nanostructured Crystals via Self-Assembly

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