Photoinduced guest transformation promotes translocation of guest from hydroxypropyl-ß-cyclodextrin to cucurbit[7]uril.

ABSTRACT

We report that three-component systems comprising styryl dyes (1 or 2) and two hosts (hydroxypropyl-ß-cyclodextrin (HP-ß-CD) and cucurbit[7]uril (CB[7])) undergo photoinduced transformation and translocation of the styryl guest from the cavity of HP-ß-CD to CB[7]. We find that the protonation of guest trans-1 or the addition of Ba(2+) as competitor for CB[7] triggers dissociation of the container-guest complexes.