Novel polyorganosiloxane xerogels with bifunctional Si(CH2)3SH/Si(CH2)3NH2 surface layer

I. V. Melnyk (Seredyuk); Yu. L. Zub; A. A. Chuiko; P. Van Der Voort

I. V. Melnyk (Seredyuk) Інститут хімії поверхні НАН України
Yu. L. Zub Інститут хімії поверхні НАН України
A. A. Chuiko Інститут хімії поверхні НАН України
P. Van Der Voort University of Antwerp

Анотація

Novel polyorganosiloxanes gels with bifunctional ( ≡SiCH₂)₃SH/ ≡Si(CH₂)₃NH₂) surface layer have been prepared by a sol-gel technique using silane-ternary systems. The surface properties of the obtained gels are highly reproducible. The effect of the addition of a catalyst was investigated, and it is shown that the addition of fluoride ion has a highly beneficial effect on the porous properties of the materials. The synthesized samples have specific surface areas up to 250 m²/g, and have a high potential as selective sorbents for heavy and noble metals (Hg²⁺, Ag⁺, Au³⁺ etc.).

Посилання

Теrtykh V.A. and Belyakova L.A. Chemical Reactions with Participation of Silica Surface.- Kiev: Naukova Dumka, - 1991. - 264 p. (in Russian).

Zaitsev V.N. Coomplexing Silicas: Syntheses, Structure of Bonded Layer and Surface Chemistry. - Khar’kov: Folio, 1997. - 240 p. (in Russian).

Kholin Yu.V. and Zaitsev V.N. Complexes on a Surface of Chemically Modified Silicas. - Khar’kov: Folio, 1997. - 136 p. (in Russian).

Vansant E.F., Van Der Voort P., and Vrancken K.C. Characterization and Chemical Modification of the Silica Surface. – Elsevier: Amsterdam, 1995. – 550 p.

Zub Yu.L. and Parish R.V. Functionalized polysiloxane sorbents: preparation, structure, properties and use // Stud. Surf. Sci. Catal. – 1996. - V.99. – P.285–299.

Voronkov М.G., Vlasova N.N., and Pozhidaev Yu.N. Organosilicon ion-exchange and complexing adsorbents (Review) // Zh. Prikl. Khimii. – 1996. – V.69, N5. – P.705–718.

Voronkov M.G., Vlasova N.N., and Pozhidaev Yu.N. Organosilicon ion-exchange and complexing adsorbents // Appl. Organometal. Chem. – 2000. – V.14. – P.287–303.

Brunauer J.S., Emmet P.H., and Teller E. Adsorption of gases in multimolecular layers // J. Amer. Chem. Soc. – 1938. – V.60. – P.309-319.

Barret E.P., Joyner L.G., and Halenda P.P. The determination of pore volume and area distributions in porous substances. I. Computations from nitrogen isotherms // J. Amer. Chem. Soc. – 1951. – V.73. – P.373-380.

Khatib I.S. and Parish R.V. Insoluble ligands and their application. I. A comparison of silica-immobilized ligands and functionalized polysiloxanes // J. Organomet. Chem. – 1989. – V.369. – P.9–16.

El-Nahhal I.M., Yang J.J., Chuang I-C., and Maciel G.E. Synthesis and solid-state NMR structural characterization of polysiloxane-immobilized thiol-amine ligands // J. Non‑Cryst. Solids. – 1996. – V.208. – P.105–118.

Yang J.J., El-Nahhal I.M., and Maciel G.E. Synthesis and solid-state NMR structural characterization of some functionalized polysiloxanes // J. Non-Cryst. Solids. – 1996. – V.204. – P.105–117.

Finn L.P., Slinyakova I.B., Voronkov M.G., Vlasova N.N., Кletsko F.P., Кirillov A.I., and Sklyar T.V. Structure and properties of polymercaptomethylsilsesquioxane xerogel // Doklady AN SSSR. – 1977. – V.236, N6. - P.1426–1429.

Voronkov M.G., Vlasova N.N., Кirillov A.I., Zemlyanushnova O.V., Rybakova M.M., Кletsko F.P., and Pozhidaev Yu.N. Poly(1-silsesquioxanylmethanethiol) – high-effective sorbent of silver and some heavy metals // Doklady AN SSSR. –1984. – V.275, N5. – P.1095–1098.

Маroshina M.Yu., Pozhidaev Yu.N., Palam B., Vlasova N.N., and Voronkov M.G. Тriorganylsilylalkanethiols // Doklady AN SSSR. –1994. – V.339, N1. – P.62–64.

Zub Yu.L., Kovaleva L.S., Zhmud’ B.V., Orlik S.N., Uzunov I., Simeonov D., Klisurski D., and Teocharov L. Rhodium complexes fixed onto polysiloxane and silica matrices with nitrogen-containing functional groups in a reaction of acetylene hydroformylation // Proc. 7^th Int. Symp. Heterogen. Catal., Bourgas, Bulgaria. – 1991. – Part 1. – P.557–561.

Finn L.P. and Slinyakova I.B. Structure and thermal degradation of polyorganosiloxane xerogels as shown by IR-spectra // Коlloid. Zh. – 1975. – V.37, N4. - P.723–729.

Stechenko O.V., Zub Yu.L., and Chuiko O.О. Syntheses and structure-adsorption characteristics of some polyaminosiloxanes // Dopovidi NAN Ukrainy. – 2002 (in press).

Parish R.V., Habibi D., and Mohammadi V. Insoluble ligands and their applications. II. Polysiloxane-phosphine ligands, their complexes, and hydrogenation catalysts // J. Organomet. Chem. – 1989. – V.369. – P.17–28.

Zub Yu.L., Parish R.V., Stechenko O.V., and Chuiko A.A. Poly-(3-aminopropyl)siloxane adsorbents: preparation and properties // J. Non-Cryst. Solids. – 2002 (in press).