Pillararene-based supramolecular polymers

Abstract

The feature paper gives an overview of the preparation of pillararene-based supramolecular polymers and covers recent research advance and future trends of pillararene-based host–guest pairs, assembly methods, topological architectures, stimuli-responsiveness, and functional features.

Construction of Supramolecular Polymers Based on Host‐Guest Recognition†

“…comparing to other macrocycles such as crown ethers, cyclodextrins, calixarenes, cucurbiturils, etc . [ 39‐43 ] In the previous research, we established the pillar[5]arene/alkyl chain host‐guest recognition (Figure 1c). [ 44 ] Based on this host‐guest recognition, we prepared, for the first time, a pillararene‐based supramolecular polymer and obtained its crystal structure (Figure 1d), indicating that supramolecular polymers could form both in solution and in the solid state.…”

Coordination-Driven Poly[2]Pseudorotaxanes in Highly Polar Organic Solvent

“…In the past 10 years, our group focused on the host–guest chemistry of pillararenes and biphenarenes (Li, 2014 ; Ma et al, 2016 ; Li H. et al, 2019 ; Wang Y. et al, 2019 ; Xu et al, 2020 ). The association constant, (7.4 ± 0.3) × 10 2 M −1 , of P 5 A and bis(pyridinium)dicationic guest in DMSO is surprisingly high, leading to the formation of a [2]psdudorotaxane-type complex (Li et al, 2010 ).…”

Self-Healing Polymer Composites Based on Hydrogen Bond Reinforced with Graphene Oxide

“…The organic polymers have found a wide utilization in diverse fields, such as textiles, packaging, automobiles, etc., owing to the characteristics of low cost and easy processing making them to be the [1][2][3] basic materials in modern life. In recent years, as significant efforts have been emphasized on the exploitation of novel polymers with 4,5 enhanced functionality, including biodegradability, semiconductivity, [6][7][8] electrical conductivity and self-healing capacity, the usage of organic polymers has been developed rapidly, in which cross-linked polymers, such as epoxy resin and phenolic resin, have strong mechanical properties but relatively fragile leading to irreparable fracture or breakage under a certain amount of external force during processing and employing, so that applications of this kind of polymers are often 9,10 subjected to limitation. In view of that self-healing can effectively extend the life of materials, realize recycling and reusing, and reduce a string of security issues and environmental problems invited by material [11][12][13][14][15] failure, the research on self-healing polymers is of great significance.…”