A novel SWCNT platform bearing DOTA and beta-cyclodextrin units. "One shot" multidecoration under microwave irradiation

作者：Gaudino E Calcio; Tagliapietra S; Martina K; Barge A; Lolli M; Terreno E; Lembo D; Cravotto G^*

来源：Organic and Biomolecular Chemistry, 2014, 12(26): 4708-4715.

DOI：10.1039/c4ob00611a

The functionalization of single-walled carbon nanotubes (SWCNTs) via microwave-assisted grafting reactions enables efficient multidecoration in a single step. A novel water-soluble SWCNT platform was prepared via the simple 1,3-dipolar cycloaddition of azomethine ylides under dielectric heating. Thanks to a single grafting reaction the CNT surface binds in a 1 : 1 ratio an amino acidic beta-cyclodextrin (beta-CD) derivative and the DOTAMA moiety (1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid mono-amide). This novel "one shot" synthesis, compared with multistep functionalizations, preserves the SWCNT's structural integrity (TEM images). Besides thermogravimetric analyses, the determination of the amount of beta-CD and DOTA moieties grafting onto the SWCNT's surface was performed on the basis of phenolphthalein and gadolinium complexation, respectively.

• 出版日期2014