The new synthesis of sulfuryl-bridged triazinane and its selective recognition to SO42−

Abstract

A new method has been developed for the synthesis of a cage-like sulfuryl-bridged triazinane molecule HEXS by acidic condensation of a glycoluril analog with (HCHO) n , having the advantages of avoiding toxic intermediate and achieving a relatively high yield of 64%. The measurements of thermodynamic quantities of the interactions of HEXS with a series of anions by isothermal titration calorimetry indicate that HEXS binds selectively toward SO 4 2− with a high binding constant K a = 1.2 × 10 6 M −1 . Further X-ray single-crystal diffraction analysis reveals that HEXS binds to SO 4 2− through multiple C-H•••O hydrogen bonding interactions.

Organic supramolecular room-temperature phosphorescence featuring profound dependence on host–guest binding behaviors

“…Among the above strategies, supramolecular strategy is now a hotspot, which mainly takes advantage of the host-guest binding [18,19]. A host such as a cyclodextrin or CB [n] can enwrap an organic luminescent guest by the hydrophobic cavity and provide a rigid and isolated microenvironment for every guest molecule, which can not only restrict the molecular motion, but also prevent aggregation-caused quenching and shield oxygen, thereby activating the RTP [17,20].…”