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Template-directed synthesis of mesoporous silicas containing phosphonic acid derivatives in the surface layer

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Inorganic Materials Aims and scope

Abstract

A template-directed process, using 1-dodecylamine as a template, is developed for the synthesis of mesoporous silicas containing the phosphonic acid derivatives ≡Si(CH2)2P(O)(OC2H5)2 and ≡Si(CH2)3P(O)(CH3)(ONa) in the surface layer. The porous materials obtained by removing the template with boiling methanol have specific surfaces of 854 and 505 m2/g, accessible pore volumes of 0.42 and 0.37 cm3/g, and pore diameters of 2.2 and 2.5 nm, respectively. As shown by scanning electron microscopy and x-ray diffraction, the mesoporous silicas are nonuniform in particle shape and size, and their structure is less ordered than that of classic mesoporous silicas, such as MCM-41. IR and 13C, 31P, and 29Si CP/MAS NMR spectroscopy data indicate that, in the surface layer of the mesoporous silica prepared with the use of ≡Si(CH2)2P(O)(OC2H5)2, the functional groups are present in the form of T 2 and T 3 structural units. In addition, the surface layer contains alkoxy groups and water, which participates in hydrogen bonding.

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Authors and Affiliations

  1. Institute of Surface Chemistry, National Academy of Sciences of Ukraine, ul. Generala Naumova 17, Kiev, 03164, Ukraine

    O. A. Dudarko, I. V. Mel’nyk, Yu. L. Zub & A. A. Chuiko

  2. Chemistry Faculty, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 2, 20-031, Lublin, Poland

    A. Dabrowski

Authors
  1. O. A. Dudarko
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  2. I. V. Mel’nyk
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  3. Yu. L. Zub
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  4. A. A. Chuiko
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  5. A. Dabrowski
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Original Russian Text © O.A. Dudarko, I.V. Mel’nyk, Yu.L. Zub, A.A. Chuiko, A. Dabrowski, 2006, published in Neorganicheskie Materialy, 2006, Vol. 42, No. 4, pp. 413–420.

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Dudarko, O.A., Mel’nyk, I.V., Zub, Y.L. et al. Template-directed synthesis of mesoporous silicas containing phosphonic acid derivatives in the surface layer. Inorg Mater 42, 360–367 (2006). https://doi.org/10.1134/S0020168506040054

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  • DOI: https://doi.org/10.1134/S0020168506040054

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