Characterization of amine stabilized CdSe/ZnS core–shell quantum dots by using triarylpyrylium dyes

A new method to study the stabilizing primary amine ligands coordinated to the surface of CdSe/ZnS core–shell quantum dots has been developed. The method is based on the reactivity of fluorescent 2,4,6-triarylpyrylium dyes with the aforementioned ligands to afford non-emissive 2,4,6-triarylpyridinium cations.Work at UJI was nancially supported by MINECO (CTQ2012- 38543-C03-01), GV (PROMETEO/2012/020) and Fundaci´o Caixa Castell´o/UJI (P1 1B-2012-41). A. B. is grateful for the support of a FPU fellowship. Technical assistance from the SCIC-UJI is acknowledged