Cucurbiturils brighten Au nanoclusters in water

Abstract

A host–guest self-assembly approach was developed to brighten Au22(FGGC)18 nanoclusters between CB[n] (n = 7, 8) and FGGC peptide in aqueous solutions.

Universal quenching of common fluorescent probes by water and alcohols

“…30 Such molecular counters based on organic fluorophores could however easily be applied in key biological environments. Furthermore, understanding the molecular basis of this universal quenching mechanism opens up new perspectives for the design of brighter molecules and materials by avoiding solvents possessing high-energy vibrations or by explicitly shielding them from solvent molecules, for example via encapsulation into cyclodextrins, [77][78][79][80] cucurbiturils, [80][81][82][83][84][85][86] or zeolites. 87,88…”

Ultralong purely organic aqueous phosphorescence supramolecular polymer for targeted tumor cell imaging

“…This mechanism has four important features: first, in aqueous solution, CBs provide a hydrophobic environment that protects the triplet state from the collision of the triplet oxygen and other molecules. Second, the strong host-guest interactions As a result, the combination of the host-guest interaction, π-π/Br-π interaction, halogen bonding, and multiple hydrogen bonding jointly contribute to the long RTP of CB [8]/HA-BrBP in aqueous solution probably by restricting the molecular motion, promoting the ISC and reducing the non-radiative decay 14,17,[31][32][33][34]37,[42][43][44][45] .…”

“…Macrocyclic compounds (i.e., cyclodextrin, cucurbituril) have become a research hotspot for realizing purely organic phosphorescence in aqueous solution due to their special properties of internal hydrophobicity/external hydrophilicity and host-guest interactions 12,[26][27][28][29][30][31][32] . Up to now, although the phosphorescence in water has made great progress through the host-guest interactions, the purely organic phosphorescence with long lifetime and function in water is rarely reported and still faces great opportunities and challenges.…”

Self‐Assembly of Precision Noble Metal Nanoclusters: Hierarchical Structural Complexity, Colloidal Superstructures, and Applications

“…demonstrated the self‐assembly of Au 22 NCs by utilizing the noncovalent ligand interaction of NCs with cucurbituril host cavities. [ 295 ] [Au 22 (FGGC) 18 ] NCs were initially synthesized by the pH adjusted reduction of HAuCl 4 in the presence of N‐terminal Phe‐Gly‐Gly‐Cys peptide (FGGC). NCs purified by the preparative thin‐layer chromatography (PTLC) techniques were allowed to interact with cucurbiturils 7 and 8 (CB[7] and CB[8]), separately.…”