A Review on Application of Crown Ethers in Separation of Rare Earths and Precious Metals

Lakshmanan, V. I.; Vijayan, S.

doi:10.1007/978-3-319-95022-8_159

Cited by 6 publications

(1 citation statement)

References 49 publications

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“…The investigation of macrocyclic compounds [ 1 , 2 ] had a very “Noble” beginning [ 3 ] with the study of crown ethers, known as the “first generation” of macrocyclic compounds [ 4 , 5 , 6 ], which awarded Cram [ 7 ], Lehn [ 8 ] and Pedersen [ 9 ] the Nobel Prize in Chemistry in 1987. Since then, a lot of marvelous research has been carried out to enrich the synthesis of different macrocyclic structures [ 10 , 11 ], as well as to expand the border of macrocyclic compound-based materials [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Pillar[n]arene-Mimicking/Assisted/Participated Carbon Nanotube Materials

Liu

et al. 2022

Materials

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The recent progress in pillar[n]arene-assisted/participated carbon nanotube hybrid materials were initially summarized and discussed. The molecular structure of pillar[n]arene could serve different roles in the fabrication of attractive carbon nanotube-based materials. Firstly, pillar[n]arene has the ability to provide the structural basis for enlarging the cylindrical pillar-like architecture by forming one-dimensional, rigid, tubular, oligomeric/polymeric structures with aromatic moieties as the linker, or forming spatially “closed”, channel-like, flexible structures by perfunctionalizing with peptides and with intramolecular hydrogen bonding. Interestingly, such pillar[n]arene-based carbon nanotube-resembling structures were used as porous materials for the adsorption and separation of gas and toxic pollutants, as well as for artificial water channels and membranes. In addition to the art of organic synthesis, self-assembly based on pillar[n]arene, such as self-assembled amphiphilic molecules, is also used to promote and control the dispersion behavior of carbon nanotubes in solution. Furthermore, functionalized pillar[n]arene derivatives integrated carbon nanotubes to prepare advanced hybrid materials through supramolecular interactions, which could also incorporate various compositions such as Ag and Au nanoparticles for catalysis and sensing.

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