Salting-in effect in organic dispersions of poly(3-hexyl thiophene)-carbon-nanotubes

Abstract

Addition of small concentrations of different inorganic salts to THF solutions of poly(3-hexyl thiophene), which contain non-dispersed powder of Multi-Walled Carbon Nanotubes (MWNTs), was found to "salt-in" the precipitated tubes leading to the formation of a stable dispersion of the MWNTs. This effect seems to result from a salt-induced conformational change of polymer chains adsorbed onto the CNTs, resulting in the onset of (entropic) steric repulsion among polymer-decorated chains.

Easy Access to 2-Fluoro- and 2-Iodo-2H-azirines via the Halex Reaction

“…Iodoazirines 7d,e were obtained in 90% yield only when a 15-fold excess of KI was used. This may be due to a significantly higher solubility of KBr, compared with KI in solutions containing ether compounds, 20 to which can be attributed compounds 1m,n and 7d,e.…”