luminogens with aggregation-induced emission (AIE) properties, referred to as AIEgens, first discovered by Tang and coworkers in 2001, exhibit enhanced emission in the aggregated state, [1] leading to the rapid development of AIE materials with diverse applications in ion detection, [2] explosive sensors, [3] cell imaging, [4] photodynamic therapy, [5] optoelectronic systems, [6] and light-harvesting systems. [7] A seminal approach to fabricate smart luminescent materials is the manipulation of AIEgens with supramolecular macrocycle-based host-guest chemistry, which could induce remarkable enhancement of fluorescence intensity of materials due to the host-guest interactions between macrocycles and AIEgens that restrict the intramolecular rotation of luminophores.[8] Pillar[n]arenes, as a new generation of synthetic macrocyclic hosts first reported by Ogoshi et al. in 2008, have proved captivating advantages including symmetrical and rigid structure, versatile functionality, [9] and good solubility. [10] Among the members of the pillar[n]arene family, pillar[5]arene and its derivatives, in which 1,4-disubstituted hydroquinones are connected by five methylene units in the 2,5-positions, exhibit the advantages of: 1) desirable host candidate to bind neutral molecules in organic solvents due to the electron-rich cavity; [11] 2) high yielding in the preparation process for further functionalization; [12] and 3) rigid structure donated stiff component in the fabrication of functional materials, and have showed great potential in sensors, [13] biomedical field, [14] catalysts, [15] separation and storage, [16] supramolecular gels, [17] and light-harvesting systems. [18] For instance, Huang and co-workers constructed an elegant host-guest inclusion complex from water-soluble pillar[6]arene and a tetraphenylethene (TPE) derivative that exhibited strong fluorescence in dilute solution. [19] Interestingly, fluorescent supramolecular assemblies that possess stimuli-responsive properties and dynamic features have been fabricated from AIEgen-containing building blocks, in particular with the aid of supramolecular macrocycles, such as crown ethers, [20] calix[n]arenes, [21] cyclodextrins, [22] cucurbit[n] urils, [23] and pillar[n]arenes, [21,24] instead of simple addition of poor solvents to induce the formation of disorganized aggregates. However, research on the cooperative manipulation of AIE by a polymer host material that contains many synthetic macrocycles installed on one single polymer chain has rarely Linear copolymer hosts bearing a number of pillar[5]arene dangling side chains are synthesized for the facile construction of highly emissive supramolecular polymer networks (SPNs) upon noncovalently cross-linking with a series of tetraphenyethylene (TPE)-based tetratopic guests terminated with different functional groups through supramolecular host-guest interactions. An extremely high fluorescence quantum yield (98.22%) of the SPNs materials is obtained in tetrahydrofuran (THF) by fine-tuning the parameters...

With the development of artificial intelligence, people are not satisfied with the traditional conductive materials and tend to focus on stretchable and flexible electronic systems. Flexible conductive rubbers have great potential applications in wearable strain sensors. However, the rapid propagation of bacteria during the use of wearable sensors may be an ineluctable threat to humans’ health. Herein, a conductive rubber film is fabricated based on carboxylic styrene–butadiene rubber (XSBR), citric acid (CA), and silver nitrate (AgNO3) via a convenient approach, where Ag nanoparticles (Ag NPs) are in situ reduced without sintering at elevated temperatures. The resultant films exhibit many desirable and impressive features, such as strengthened mechanical properties, flexibility, and conductivity. More importantly, the Ag NP flexible conductive films exhibit excellent antibacterial activity against Escherichia coli (Gram-negative bacteria) and Staphylococcus aureus (Gram-positive bacteria), which have potential applications as flexible antibacterial materials to monitor movements of the human body in real time. Also, because of the hygroscopicity of CA, the resistance of our conductive film is sensitive to various humidities, which can be applied in the humidity sensor.

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Pillar[5]arene pseudo[1]rotaxane-based supramolecular vesicles loaded with anticancer drugs could deliver the payload to the targeted area of high GSH concentrations.