Novel super-microporous silicate templating by ω-hydroxyalkylammonium halide bolaform surfactants

Bagshaw, Stephen A.; Hayman, Alan R.

doi:10.1039/b000422g

Cited by 53 publications

(51 citation statements)

References 17 publications

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“…In this contribution we report results from the first stages of a long-term collaborative project aimed at novel template and templated materials design, synthesis, characterization, and application. [12] We will focus mainly on materials, which we designate IROU-1, templated by the bolaform surfactant x-hydroxy hexadecyltriethylammonium bromide 1 (HOCTEAB). For 1 in water the critical micelle concentration (cmc) was found to be 6.2 mM at 25 C and the Krafft temperature, 18 C. The x-hydroxy bolaform surfactants have Krafft temperatures about 30 C higher than the corresponding non-hydroxy surfactants.…”

Section: Resultsmentioning

confidence: 99%

“…[13a,c] This further implied that the hydroxyl group could be involved in H-bonding at the organic/water/inorganic interface either with the surfactant ammonium head group or an incoming silicate reagent. Such an interaction could therefore modify the effective surfactant headgroup area, the subsequent micelle packing and the available pore symmetries [12] of a templated inorganic mesostructure.…”

Section: Research Newsmentioning

confidence: 99%

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Super-Microporous Silicate Molecular Sieves

Bagshaw¹,

Hayman

2001

Adv. Mater.

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A new synthesis of supermicroporous silica (1.6–2.0 nm diameter), using micelles of a quaternary ω‐hydroxyalkylammonium salt, is presented by the authors. The material exhibits highly ordered pore arrays (see Figure). Details on pore size determination by adsorption techniques are given. In an outlook, the effects of template chain length and of Al or Ti doping (catalytic centers) on pore size and array stability are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Research Newsmentioning

confidence: 99%

Super-Microporous Silicate Molecular Sieves

Bagshaw¹,

Hayman

2001

Adv. Mater.

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“…Ordered supermicroporous silica with pore size of 1⋅96 nm was synthesized from a double-chain surfactant by Ryoo et al (2001). ö-hydroxy-bolaform as surfactants, highly ordered super-microporous silica with pore size of 1⋅4-2⋅0 nm has been synthesized by Bagshaw and Hayman (2000). A series of lamellar super-microporous silica with pore size of 1⋅2-1⋅5 nm were synthesized by nanocasting with ionic liquids (Zhou and Antonietti 2003).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of super-microporous material with enhanced hydrothermal stability

Song

Guan

et al. 2011

Bull Mater Sci

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Super-microporouos silicon material with high hydrothermal stability denoted as MCM-41-T has been prepared from mesoporous MCM-41 by high temperature treatment. The structural and chemical property of MCM-41-T has been characterized by X-ray diffraction, transmission electron microscopy, N 2 adsorption-desorption, infrared spectroscopy and 29 Si MAS NMR. The characteristic results show that Si-OH groups are forced to condense by high temperature treatment, and the pore size of MCM-41-T is around 1⋅5 nm in the super-microporous range. Compared with the original material MCM-41, the hydrothermal stability of MCM-41-T has been significantly enhanced.

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“…Up to now, less attention has been developed to the synthesis of materials in the super-microporous (pore size 1-2 nm) range [26][27][28][29][30][31][32][33]. The materials in this pore size range are very important since the bridge the gap between microporous zeolites and mesoporous materials.…”

Section: Introductionmentioning

confidence: 99%