التفاصيل البيبلوغرافية
| العنوان: |
The intercalation of bicyclic and tricyclic carboxylates into layered double hydroxides |
| المؤلفون: |
Khan, Aamir I.1, Williams, Gareth R. g.williams@londonmet.ac.uk, Hu, Gang1, Rees, Nicholas H.1, O'Hare, Dermot dermot.ohare@chem.ox.ac.uk |
| المصدر: |
Journal of Solid State Chemistry. Dec2010, Vol. 183 Issue 12, p2877-2885. 9p. |
| مصطلحات موضوعية: |
*BICYCLIC compounds, *CARBOXYLIC acids, *HYDROXIDES, *NANOCOMPOSITE materials, *NUCLEAR magnetic resonance spectroscopy, *SOLID state chemistry, *X-ray diffraction, *NUCLEATION, *INTERMEDIATES (Chemistry) |
| مستخلص: |
Abstract: Twenty-four nanocomposites built from layered double hydroxides and bicyclic and tricyclic carboxylates have been synthesised for the first time. Eight carboxylates were successfully intercalated into [LiAl2(OH)6]Cl·yH2O, [Ca2Al(OH)6]NO3·yH2O, and [Mg2Al(OH)6]NO3·yH2O, and the products fully characterised. Guest species incorporated include 1-adamantane carboxylate (1-AC) and 5-norbornene-2-endo-3-exo-dicarboxylate. In some cases, carbonate anions were co-intercalated with the organic guest, and in others poorly crystalline aluminium hydroxides formed as by-products. Sharper resonances were observed in the 13C solid-state NMR spectra of the 1-AC intercalates than in the spectrum of pure 1-AC, suggesting increased order in the arrangement of the cyclic cages in the intercalates. Where possible, time-resolved in situ X-ray diffraction was employed to study the nanoscopic steps involved in the intercalation reactions. These investigations showed that the reactions are one-step processes, proceeding directly to the fully exchanged intercalate with no intermediate phases. The intercalation processes were found to be nucleation controlled. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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