In situ polyphenyl derivatisation and the effect of thermal decomposition of adsorbed and chemisorbed polyphenyls on the structure of multi-wall carbon nanotubes
作者： András Gergely , Kálmán Újszászy , Csaba Peltz , Péter Király , Gábor Tárkányi
DOI: 10.1016/J.APSUSC.2011.02.040
关键词:
摘要: Abstract This study presents the exploitation of an alternative reaction route deamination arylamines to perform in situ derivatisation multi-walled carbon nanotubes (MWCNTs) with polyphenyl (PPh) species various masses. As a result consecutive derivatisation, high conversion PPh grafting MWCNTs was realised collateral outgrowth physical modification adsorbed additional PPhs. Applied process exceeds monolayer coverage related superficial saturation limitations overall yield nanotubes. Thus, linear relationship recognized between quantities chemisorbed PPhs composed D 5 -phenylene oligomers and applied excess diazonium activated reagents, corresponding 2 H MAS NMR spectroscopy results. According mass spectrometry (MS) investigations, uniform thermal decomposition modified found besides more intense altered characteristic-featured adsorbate-chemisorbate contained during sequential pyrolysis under inert atmosphere. is attributed provoked isomerisation, formation moieties. result, mediated even pronounced degradation order graphitic lattice were evidenced chemisorbate samples by FT-Raman transmission electron microscopy (TEM), respectively. supplied results relevant amount deuterium sample without traces aromatic MS detected volatile products, these allow us conclude about thermally stable that interpreted as endohedral
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