Hybrid lamellar nanocomposites based on organically functionalized magnesium phyllosilicate clays with interlayer reactivity

Journal of Materials Chemistry

Volumn 8, Issue 8, 1998, Pages 1927-1932

  Whilton, Nicola T ^a   Burkett, Sandra L ^a,b   Mann, Stephen ^a  

^a University of Bath Claverton Down   (United Kingdom)

^b Massachusetts Institute of Technology Cambridge   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000770193     PISSN: 09599428     EISSN: None     Source Type: Journal    
DOI: 10.1039/a802120a     Document Type: Article

References (26)

1. For review articles, see (a) S. Mann, D. D. Archibald, J. M. Didymus, T. Douglas, B. R. Heywood, F. C. Meldrum and N. J. Reeves, Science, 1993, 261, 1286;
2. (b) S. Mann and G. A. Ozin, Nature, 1996, 382, 313;
3. (c) M. Antonietti and C. Goltner, Angew. Chem., Int. Ed. Engl, 1997, 36, 910;
4. (d) S. I. Stupp and P. V. Braun, Science, 1997, 277, 1242.
5. Many papers have been published on mesoporous materials, for a recent review, see: J. S. Beck and J. C. Vartuli, Curr. Opin. Solid State Mater. Sci., 1996, 1, 76.
6. S. L. Burkett, S. D. Sims and S. Mann, Chem. Commun., 1996, 1367.
7. Y. Fukushima and M. Tani, J. Chem. Soc., Chem. Commun., 1995, 241.
8. S. L. Burkett, A. Press and S. Mann, Chem. Mater., 1997, 9, 1071.
9. L. Ukraincyzk, R. A. Bellman and A. B. Anderson, J. Phys. Chem. B, 1997, 101, 531.
10. K. A. Carrado, Ind. Eng. Chem. Res., 1992, 31, 1654.
11. An alternative proposal for this system involves a mechanism driven by the formation of a lamellar template of self-assembled silane triols. Binding of aqueous metal species to these negatively charged surfactant layers results in condensation with the silanol hydroxyl groups and formation of the magnesium (organo)phyllosilicate structure (see ref. 6 for details).
12. 4; Mg-EPTMS CaIc.: C, 35.7; H, 5.7. Found: C, 33.3; H, 6.0%. Mg-ALTMS Calc.: C, 28.2; H, 4.3. Found: C, 27.5, H, 4.4%. Mg-ITES Calc.: C, 36.4, H, 7.0, N, 14.2. Found: C, 22.1, H, 5.9; N, 5.5%, Mg-EDTMS Calc.: C, 32.4; H, 7.0; N, 14.2. Found: C, 16.8; H, 5.8; N, 6.5%.
13. K. A. Carrado, P. Thiyagarajan, R. E. Winans and R. E. Botto, Inorg. Chem., 1991, 30, 794.
14. D. M. C. MacEwan, in The X-Ray Identification and Crystal Structures of Clay Minerals, ed. G. Brown, Mineralogical Society, London, 1961, ch. 4.
15. JCPDS Card Number 13-0558.
16. 2), 3050 (CH alkene)
17. 2O, Si-OH, 3200-3600), MgO-H (3700).
18. 13C CP MAS NMR (75 MHz, TMS, 20°C). Mg-EPTMS: δ 73.71, 72.08, 51.08, 44.04. 23.81, 13.20, 9.75. Mg-EDTMS: δ 49.00, 38.66, 23.19, 14.45. Mg-ALTMS: δ 132.41, 115.66, 20.81. Mg-ITES: δ 164.50, 50.18, 46.17, 39.74, 23.71, 14.61.
19. 3, 70.5%). Peak intensities are not quantitative with mol% Si.
20. 3 silicon centres in Mg-EDTMS is probably due to the slow condensation kinetics of amino-functionalized alkoxysilanes. The product of hydrolysis, the silanol species, may be stabilized through hydrogen-bonding between amine and hydroxyl groups and the rate of condensation is decreased (H. Ishida, C. H. Chiang and J. L. Koenig, Polymer, 1982, 23, 251).
21. 4: Calc. C, 32.4; H, 7.0; N, 14.2%. Found: C, 26.1, H, 7.0; N, 10.9%.
22. D. W. Schaefer and K. D. Keefer, Mater. Res. Soc. Symp. Proc., 73, 277.
23. T. Mizutani., Y. Fukushima, O. Okada and O. Kamigaito, Bull. Chem. Soc. Jpn., 1990, 63, 2094.
24. J. F. Diaz, K. J. Balkus Jr., F. Bedioui, V. Kurshev and L. Kevan, Chem. Mater., 1997, 9, 61.
25. W. H. Pirkle ad P. L. Rinaldi, J. Org. Chem., 1978, 43, 3803.
26. 3, 63.2%).