Thiacalixarenes: emergent supramolecules in crystal engineering and molecular recognition

Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining processes

“…In these cases, extraction removes only Pd(II) into the organic diluent, chlorinated diluent, or mixture of diluents 18–22, 28–33 , and oxidation in acidic media causes Pd(II) extraction to be highly dependent on the acidity and type of leach liquors. Pd(II) extraction efficiency is good in weakly acidic media, but decreases dramatically in strong acid media 22, 31, 33–35 . Synthesis of new, robust extractants faces several major issues including use of expensive reagents, multiple synthetic steps 22, 31 , advanced purification methods, durability, and difficulties in back extraction and reusability.…”

“…Pd(II) extraction efficiency is good in weakly acidic media, but decreases dramatically in strong acid media 22, 31, 33–35 . Synthesis of new, robust extractants faces several major issues including use of expensive reagents, multiple synthetic steps 22, 31 , advanced purification methods, durability, and difficulties in back extraction and reusability. To date, no effective extractants applicable to industrial operations have been developed for complete recovery of Pd(II) from primary and secondary PGM resources.…”

Towards macrocyclic ionic liquids: novel ammonium salts based on tetrasubstituted p-tert-butylthiacalix[4]arenes

“…Despite large synthetic and conformational diversity of (thia) calix [4]arenes as molecular building platform, [18][19][20][21][22][23][24] there are only few examples of the synthesis of ionic liquids based on them.…”

Thiacalix[4]arene’s Lower Rim Derivatives: Synthesis and Supramolecular Properties

“…[1][2][3][4][5][6] Later thiacalix [4]arene, firstly described by Miyano, [7] became a very attractive class of calixarene family that can be tuned to serve as efficient host for different guests either by modulating their conformation or by modifying the nature and number of ligating sites. [8][9][10][11][12][13][14] Attractive features of thiacalix [4]arene scaffold for the design of the host molecules are presented in Figure 1.…”

“…[8][9][10][11][12][13][14] In this review, we have focused and highlighted our recent findings of (i) synthesis of lower rim tetrasubstituted derivatives of thiacalixarene, and (ii) design of thiacalixarene-based amphiphilic receptor molecules and their application for the sensing technique.…”