Controlling Size‐Dispersion of Single Walled Carbon Nanotubes by Interaction with Polyoxometalates Armed with a Tryptophan Tweezer.

Syrgiannis, Zois; Trautwein, Guido; Calvaresi, Matteo; Modugno, Gloria; Zerbetto, Francesco; Carraro, Mauro; Prato, Maurizio; Bonchio, Marcella

A bis‐tryptophan tweezer was installed on a polyoxometalate (POM) surface via a bis‐amide covalent bond, yielding the enantiopure hybrid POM with C2 symmetry, as a result of the regioselective functionalization of decatungosilicate [γ‐SiW10O36]8– at the lacunary site. The combined polyanionic and receptor properties are instrumental for a POM‐driven solubilization and enrichment of single walled carbon nanotubes (SWCNTs) with diameter <1.1 nm, as demonstrated by Raman and UV/Vis‐NIR evidence, in agreement with the calculated energetics of the tryptophan tweezer–SWCNT interaction. The preference of SWCNT(9,3) to interact within a tryptophan‐based hydrophobic pocket is demonstrated by experimental and computational evidence, addressing the selective binding of a polyoxometalate‐based tweezer

SINGLE walled carbon nanotubes; DISPERSION (Chemistry); POLYOXOMETALATES; TRYPTOPHAN; COVALENT bonds; SOLUBILIZATION

European Journal of Inorganic Chemistry, 2019, Vol 2019, Issue 3/4, p374

1434-1948

Academic Journal

10.1002/ejic.201800660