Stimuli-responsive blue fluorescent supramolecular polymers based on a pillar[5]arene tetramer

Abstract

A tetraphenylethene-bridged pillarene tetramer with aggregation-induced emission properties forms an A4/B2-type supramolecular polymer and a gel with a symmetric neutral guest linker, showing a remarkable fluorescence emission enhancement in solution and the solid state and a good responsiveness to temperature and solvent composition.

Efficient complexation between pillar[5]arenes and neutral guests: from host–guest chemistry to functional materials

“…al in 2001, 38 luminogenic materials with AIE properties have been gained comprehensive attention. In 2014, Yang 35 and Wang 36 separately reported cross-linked AIE supramolecular materials connected by P5A-based host-guest recognition at almost the same time. As we can see from Fig.…”

“…After being reported, 36⊂P5A host-guest pair has been widely used to construct supramolecular aggregates, 32,33,34,35,36,37 and has become a star motif for pillararene-based self-assembly.…”

Zn2+‐Triggered Drug Release from Biocompatible Zirconium MOFs Equipped with Supramolecular Gates

“…The superior structures, facile functionalization, and typical host-guest properties of pillarenes stimulated a tremendous upsurge of interest in artifi cial transmembrane channels, [ 33,34 ] drug nanocarriers, [35][36][37][38][39][40] gas sorption, [ 41,42 ] MOFs, [ 43 ] sensing and detection, [ 44 ] stabilization of nanoparticles, biological applications, [ 45,46 ] etc. [47][48][49][50][51] Herein, benign activation mechanisms have been applied to targeted drug release systems constructed from monodisperse nanoMOFs (NMOFs) and carboxylatopillar [5]arene (CP5)-based stimuli-responsive supramolecular gates for CNS disease therapy for the fi rst time ( Figure 1 ). External heating as an important treatment of physical therapy in modern and traditional medicine has been introduced to regulate drug release from the gated nanocarriers.…”

Pillar[n]arenes and Other Cavitands: Aspects of Complex Thermodynamics

“…Figure 5, are well correlated with the linear relationship of enthalpy-entropy compensation. [64][65][66] The data sets available for the PA[n]s roughly propose a large slope (α), and a large intercept ( o 0 T S Δ ), implying a small enthalpic gain in complex formation along with a significant desolvation effect (Table 2). In other words, these results suggest that the conformational alterations did not have a significant effect on the binding of guests, while the release of solvent molecules from the host had a considerable contribution.…”