1.D.205. The Macrocyclic Solid Nanochannel (MS-NC) Family
Numerous solid nanochannels have controllable chemical properties on surfaces and superior mechanical properties. Surface functionalization has been confirmed to be vital to determine the properties of solid nanochannels. Macrocyclic hosts (e.g., the crown ethers, cyclodextrins, calix[n]arenes, cucurbit[n]urils, pillar[n]arenes, and trianglamine) can be tailored to the interior surface of the nanochannels with specific performance of stimuli response and separation. Macrocycles have good reversibility and high selectivity toward specific ions or molecules, promoting functionalies of solid nanochannels. Hence, the combination of macrocyclic hosts and solid nanochannels is conducive to taking both advantages and achieving applications in functional nanochannels (e.g., membranes separations, biosensors, and "smart" devices). Chen et al. 2023 have reviewed the most recent advances in nanochannel membranes decorated by macrocyclic host-guest chemistry. A variety of macrocyclic hosts-based responsive nanochannels are organized (e.g., the physical stimuli and specific molecules or ions stimuli), and nanochannels are separated (e.g., water purifications, enantimerseparations, and organic solvent nanofiltration), respectively.