Monday, 30 May 2022: 10:40
West Meeting Room 204 (Vancouver Convention Center)
Normally, the as-prepared single-walled carbon nanotubes (SWNTs) form large bundles, and some technologies are applicable to the dispersion and separation of SWNTs. In this work, the alkanoyl derivates of natural imino acid proline were synthesized via Shortten-Bowman reaction and applied to the individual dispersion of arc-discharged SWNTs in aqueous solution. Especially, the synthesized surfactants display a selective dispersion towards semiconducting SWNTs with larger chiral angles, offering a facile method to efficiently disperse semiconducting SWNTs in liquid media.
Experimental results show that all of the alkanoyl proline derivates (dodecanoyl-, tetradecanoyl-, hexadecanoyl- or octadecanoyl-L-proline sodium) are better dispersants for arc-discharged SWNTs than sodium deoxycholate (DOC). Among the four synthesized derivates, the sodium hexadecanoyl-L-proline (SHP) demonstrates the most efficient selectivity towards semiconducting SWNTs with chiral angle larger than 26 °. It is believed that the π-π and C-H···π interactions leaded charge transfer between proline alkanoyl derivatives and SWNTs is responsible for the selective dispersion of arc-discharged SWNTs.