Cucurbit[n]uril
(CB[n])-mediated
assembly of π-conjugated azapyrene derivatives with rigid aromatic
rings as bridging units into optically tunable complexes is reported.
Due to the hindrance of rotation of diazapyrene moieties and the enhancement
of intramolecular charge transfer of chromophore guests within the
cavity of the CB[8] host, color tuning including white-light emission
was easily achieved by introducing CB[8] into the guest aqueous solution,
therefore suggesting a feasible strategy for the creation of tunable
white-light emission materials through CB[n]-based
host–guest interactions.
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