TY - JOUR A1 - Hanelt, Sven A1 - Friedrich, Jörg Florian A1 - Orts Gil, Guillermo A1 - Meyer-Plath, Asmus T1 - Study of Lewis acid catalyzed chemical bromination and bromoalkylation of multi-walled carbon nanotubes T2 - Carbon N2 - Chemical functionalization of carbon nanotubes (CNT) with nucleophiles requires introduction of electrophilic reactive sites on the CNTs. This can, for instance, be accomplished by the chemical bromination procedure with elemental bromine and a set of Lewis acids (BBr3, BF3 × Et2O, AlBr3, FeBr3, ZnBr2, TiBr4, SiBr4, SnBr4, VBr3) or a radical starter like dibenzoylperoxide (DBPO) in appropriate solvents at varied temperature. The present approach to electrophilic sites relies on the well-known electrophilic aromatic substitution or addition of bromine with aromatic structural units. In addition to the use of bromine, the introduction of haloalkyl groups was also investigated here using bis-electrophiles or haloalcohols and Brønsted acids. The advantages and drawbacks of the studied reaction conditions, the obtained degree of bromination as analyzed by X-ray photoelectron spectroscopy (XPS) and the amount of introduced bromine that can be substituted by a nucleophile are presented and discussed. PB - Pergamon Press CY - New York, NY KW - Carbon nanotubes KW - Bromierung KW - Lewis Säure KW - Bromalkylierung KW - CNT PY - 2012 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/25207 AN - OPUS4-25207 SN - 0008-6223 SN - 1873-3891 VL - 50 IS - 3 SP - 1373 EP - 1385 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany