Colorimetric ‘naked-eye’ sensor for anions based on conformational flexible tripodal receptor

Anion coordinated capsules and pseudocapsules of tripodal amide, urea and thiourea scaffolds

“…Structures of halide complexes [TBA(10$X)] (X ¼ F À /Cl À ), has further conrmed the A cationic tripodal receptor 12, based on amide-pyridinium as recognition sites and nitrobenzene as signaling unit showed high selectivity and strong binding affinity for AcO À (log K > 5.0) over other anions. 62 UV-Vis and 1 H NMR experiments indicated that the selectivity can be attributed to synergistic effects arising from hydrogen bonding, electrostatic interactions and conformational change.…”

Supramolecular Motifs in the Crystal Structures of Triethylbenzene Derivatives Bearing Pyridinium Subunits in Combination with Pyrimidinyl or Pyridinyl Groups

“…In contrast, the identically substituted triethylbenzene derivatives with three cationic recognition sites are unable to effectively complex Neu5Ac in aqueous media but showed strong binding in less competitive solvents, such as acetonitrile, as expected. At this point, it should be mentioned that studies with triethylbenzene-based compounds possessing three cationic groups, such as pyridinium, bipyridinium, quinolinium or imidazolium groups, have made a very important contribution to the field of anion recognition [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

“…Molecules 2023, 28, x FOR PEER REVIEW 2 of 19 it should be mentioned that studies with triethylbenzene-based compounds possessing three cationic groups, such as pyridinium, bipyridinium, quinolinium or imidazolium groups, have made a very important contribution to the field of anion recognition [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”