Luminescence Properties of Self-Aggregating Tb^III-DOTA-Functionalized Calix[4]arenes.

ABSTRACT: Self-aggregating calix[4]arenes carrying four DOTA ligands on the upper rim for stable complexation of paramagnetic Gd^III-ions have already been proposed as MRI probes. In this work, we investigate the luminescence properties of Tb^III-DOTA-calix[4]arene-4OPr containing four propyl-groups and compare them with those of the analog substituted with a phthalimide chromophore (Tb^III-DOTA-calix[4]arene-3OPr-OPhth). We show that, given its four aromatic rings, the calix[4]arene core acts as an effective sensitizer of Tb-centered luminescence. Substituents on the lower rim can modulate the aggregation behavior, which in turn determines the luminescence properties of the compounds. In solid state, the quantum yield of the phthalimide derivative is almo

SUBMITTER: Mayer F 

PROVIDER: S-EPMC5797610 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature