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Scientific Article
unige:16758 
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Novel sodium aluminium borohydride containing the complex anion [Al(BH4,Cl)4]− |
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| Published in | Faraday Discussions. 2011, vol. 151, p. 231-242 | |
| Abstract | The synthesis of a novel alkali-metal aluminium borohydride NaAl(BH4)xCl4−x from NaBH4 and AlCl3 using a solid state metathesis reaction is described. Structure determination was carried out using synchrotron powder diffraction data and vibrational spectroscopy. An orthorhombic structure (space group Pmn21) is formed which contains Na+ cations and complex [Al(BH4,Cl)4]−anions. Due to the high chlorine content (1 ≤ x ≤ 1.43) the hydrogen density of the borohydride is only between 2.3 and 3.5 wt.% H2 in contrast to the expected 14.6 wt.% for chlorine free NaAl(BH4)4. The decomposition of NaAl(BH4)xCl4−x is observed in the target range for desorption at about 90 °C by differential scanning calorimetry (DSC), in situ Raman spectroscopy and synchrotron powder X-ray diffraction. Thermogravimetric analysis (TG) shows extensive mass loss indicating the loss of H2 and B2H6 at about 90 °C followed by extensive weight loss in the form of chloride evaporation. | |
| Identifiers | DOI: 10.1039/c0fd00024h | |
| Full text |
Article (Published version) (623 Kb) - Limited access to UNIGE Other version: http://xlink.rsc.org/?DOI=c0fd00024h |
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| Structures | ||
| Research groups | Groupe Cerny Groupe Hagemann | |
| Citation (ISO format) | LINDEMANN, Inge et al. Novel sodium aluminium borohydride containing the complex anion [Al(BH4,Cl)4]−. In: Faraday Discussions, 2011, vol. 151, p. 231-242. doi: 10.1039/c0fd00024h https://archive-ouverte.unige.ch/unige:16758 |
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