Pyridine Detection Using Supramolecular Organic Frameworks Incorporating Cucurbit[10]uril

A physical impregnation method is presented in this study, providing
a facile approach to encapsulating functional guest molecules (GMs)
into robust crystalline supramolecular organic frameworks incorporating
cucurbit[10]­uril (Q[10]-SOF). As Q[10]-SOF has high evaporated pyridine
affinity under normal atmospheric pressure, pyridine molecules in
this method were successfully encapsulated into the nanospace formed
by GMs and Q[10]-SOF while retaining their crystal framework, morphology,
and high stability. GMs@Q[10]-SOF solid materials were found to respond
to pyridine, being suitable to be used as solid sensors. Notably,
Q[10]-SOF loading with pyrene exhibited a unique response to pyridine
along with dramatic fluorescence quenching; loading with dansyl chloride
exhibited a unique response to pyridine along with significant fluorescence
enhancement, having a quick response within 60 s. Our findings represent
a critical advancement in the design of pyridine detection and adsorption
for commercial gas identification and sensing.