Dual‐Rotor Luminescence Based on Supramolecular Secondary Reassembly

Abstract

exploration of new chromophores and stimuli-responsive luminogens, and so on. [7] As efficient means and strategies, supramolecular assembly and host-guest chemistry exhibit numerous advantage in facilitating fluorescence emission of organic small molecules. [8] Particularly, macrocyclic compounds with unique cavity structure, such as cyclodextrins, [9] cucurbiturils, [10] crown ethers, [11] and so on, [12] can form host-guest complexes or supramolecular assemblies with organic molecules to keep from quenching caused by molecular motion or aggregation, and have been widely used to construct smart luminescent materials.

Smart organic materials based on macrocycle hosts

“…Notably, the polymer chains can exert extra restriction on molecular motions of luminophores compared with mere host–guest interactions, which opens up the possibility in further promoting the inherent luminescence efficiency. 30 For example, the immobilisation of luminogens with aggregation-induced emission (AIE) properties, AIEgens for short, on macrocycle-based or guest-containing monomers for supramolecular assembly is regarded as a superior choice for emission enhancement, entanglement by robust polymer chains would still essentially boost their emissive efficiencies by providing confined environments. Guided by this premise, Yang and coworkers synthesized a series of P[5]-containing copolymers as polymer hosts for interacting with various AIEgen-bearing guest molecules, namely tetraphenylethene (TPE) and 9,10-distyrylanthracene (DSA) (Fig.…”

Ion recognition properties of 2,2′-bibenzimidazole regulated by ammonium-modified pillar[5]arenes

“…32–37 Hydrogen bonding, 38,39 π–π stacking interaction, 40 electrostatic interaction, 41 ionic interaction, 42 and covalent bonds are the potential driving forces behind these interactions. 43–45 It is a potential strategy for improving the selectivity and specificity of ion recognition by taking advantage of these features. 46 Relevant studies on controlling the selectivity and specificity of ion recognition by pillar[ n ]arenes are relatively rare.…”

Metal Cation-Doped ns-Cucurbit[10]uril: Adsorption of Para-Phenylenediamine

“…The emergence and rapid development of cucurbit­[ n ]­urils as the fourth class of host macrocycles have been witnessed in the past few decades. − Their distinctive pumpkin-shaped structures and diverse host–guest properties have garnered extensive applications. − Additionally, there have been reports on the utilization of permanently porous cucurbit­[ n ]­uril crystals as adsorbent materials. − Huang’s group recently reported cucurbit[6]­uril as an ideal material for the separation of pyridine and toluene . However, the existing macrocyclic compounds are mainly dominated by a single cavity, and their application capabilities may be limited by the size and number of cavities.…”