Supramolecular Storage and Controlled Photorelease of an Oxidizing Agent using a Bambusuril Macrocycle.

ABSTRACT

The oxidizing ability of peroxodisulfate upon complexation inside the Bambusuril macrocycle cavity is inhibited. This dianionic agent can be released on demand from its stable 11 complex in water (log Ka =6.9 m-1 ) by addition of a more strongly bound anion, such as iodide (log Ka =7.1 m-1 ), which can also be delivered in situ upon irradiation from a 4-hydroxyphenacyl iodide derivative with spatial and temporal precision. The oxidizing properties of peroxodisulfate ions liberated from the complex recover and can take part in subsequent chemical transformations.