Cucurbit[n]uril-based host–guest-metal ion chemistry: an emerging branch in cucurbit[n]uril chemistry

Assemblies of cucurbit[6]uril-based coordination complexes with disulfonate ligands: from discrete complexes to one- and two-dimensional polymers

“…[2][3][4][5][6][7][8][9] In terms of Q[n]-based coordination chemistry, numerous Q[n]-based coordination complexes have been reported, especially species showing strong affinity for alkali, alkaline-earth and rare earth metal ions. 4,[8][9][10][11][12][13][14][15] Despite these achievements, there remain many challenges that need to be addressed in the field of Q[n]-based coordination chemistry, one of which is the difficulty associated with the construction of high dimensional Q[n]-based coordination polymers. [15][16][17] As far as we know, most of the reported Q[n]-based coordination complexes are constructed by the direct coordination of metal ions to Q[n]s and form either simple coordination complexes, such as molecular "bowls", "capsules", "dumbbells" or one-dimensional chains, 12,[18][19][20][21][22][23] while twodimensional (2D) and three-dimensional (3D) coordination polymers are scant.…”

Identification of Ferric Ions Using a Palmatine@Q[8] Fluorescent Probe

“…Cucurbit[n]urils (Q[n]s) are constructed from n glycolurils bridged by 2n methylene groups, and have a pumpkin‐shaped rigid hydrophobic cavity accessible via two opposing portals rimmed by carbonyl groups . Q[n]s can both include guests species in the cavities, and coordinate metal cations through the portal carbonyl oxygens, resulting in distinctive Q[n]‐based host‐guest chemistry‐ and Q[n]‐based coordination chemistry‐ Simple Q[n]‐guest interactions can be influenced by metal cations, and simple Q[n]‐metal cation coordination can be influenced by organic guests, because Q[n] can interact with both guests and metal cations simultaneously . Therefore, combining Q[n]‐based host‐guest chemistry and coordination could establish novel Q[n]‐based host‐guest‐coordination or Q‐G‐M chemistry, potentially leading to materials with new properties and applications .…”

“…Q[n]s can both include guests species in the cavities, and coordinate metal cations through the portal carbonyl oxygens, resulting in distinctive Q[n]‐based host‐guest chemistry‐ and Q[n]‐based coordination chemistry‐ Simple Q[n]‐guest interactions can be influenced by metal cations, and simple Q[n]‐metal cation coordination can be influenced by organic guests, because Q[n] can interact with both guests and metal cations simultaneously . Therefore, combining Q[n]‐based host‐guest chemistry and coordination could establish novel Q[n]‐based host‐guest‐coordination or Q‐G‐M chemistry, potentially leading to materials with new properties and applications . One major branch of Q‐G‐M chemistry has focused on the recognition of metal ions by Q[n]‐based host‐guest complexes through obvious changes in their physical and/or chemical properties, especially, UV‐vis absorption or fluorescence characteristics.…”

Specific Recognition of Hg2+ and other Cations by a Hoechst33258@inverted Cucurbit[7]uril Fluorescence Probe Using Different pH Media

“…With the deepening of research, cucurbit[ n ]uril (Q[ n ]) chemistry has changed from its use in simple host‐guest chemistry and coordination chemistry to use in more comprehensive and hybrid research directions . Amongst the newer areas of study is the area of cucurbit[ n ]uril‐based host‐guest‐metal ion chemistry, or the Q−G‐M chemistry.…”

“…Amongst the newer areas of study is the area of cucurbit[ n ]uril‐based host‐guest‐metal ion chemistry, or the Q−G‐M chemistry. It was proposed because Q[ n ]‐based host‐guest inclusion interactions may be influenced by metal ion coordination at the Q[ n ] portals, and in turn, coordination of metal ions at the Q[ n ] portals could be promoted or demoted by the formation of Q[ n ]‐based inclusion host‐guest complexes . The Q−G‐M chemistry may find varied applicability, such as in the treatment of wastewater from the textile industry, kinetic studies, the design of molecular capsules for drug delivery, and construction of supramolecular polymers or frameworks among others .…”