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Chapter 7 179<br />

D2<br />

This sample was prepared as D1 using 160mg ip (2 molar equivalent to that of H3BTC)<br />

instead. The resulting blue powder products were separated from the solution by<br />

centrifugation. Afterwards, they were washed by DMF(30 ml x 3), EtOH (30 ml x 3) and<br />

acetone (30 ml x 3) subsequently. Finally, the solvent was removed and the powder was<br />

dried under air at room temperature. The activation of the solids was performed by<br />

heating at 170 °C for 24 h under dynamic vacuum (ca. 10 -3 mbar).<br />

Figure 7.16. 1 H-NMR spectra of the acid-digest D2 sample (solvent: DMSO-d 6 , DCl).

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