A new fluorogenic calix[4]arene N-dansylcarboxamide in the cone conformation for selective optical recognition of mercury(II)

Functionalization reactions of calixarenes

“…153 The works aiming to use calixarenes for construction of systems adsorbing gases such as hydrogen, 154 or methane, 155 are of interest in the field of energetics, and the development of these investigations is expected. A growing attention is paid today to a wide range of sensors, 156,157 as well as to removal of undesired compounds from industrial waste, [158][159][160] this research area being strongly connected with the environment protection.…”

Sulfonated Schiff base Sn(IV) complexes as potential anticancer agents

“…Attempts to get reasonable disorder model were not successful. They were thus refined isotropically [92]. Table 1.…”

Dansyl-containing fluorogenic calixarenes as optical chemosensors of hazardous metal ions: a mini-review

“…Known metal-sensing dansyl-containing fluorogenic calixarenes (as well as thiacalixarenes) vary in the fashion of the fluorophore attachment to the receptor moiety as HN-dansyl (37,(41)(42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54) and O-dansyl ligands (36,(55)(56)(57) (for the structural formulae, see Figures 1-4). In the former type, the anchor NH-group usually is a part of carbamoyl or aminoalkyl linker, or it may be bound directly to the aromatic ring of the calixarene; while in the latter type, the dansyl moiety is a substituent on the calixarene lower-rim phenolic oxygen.…”

“…The former behaves as a softer donor of electrons, in part, due to the possibility of negative charge delocalisation upon the NH-proton dissociation. Accordingly, HN-dansyl-appended calixarenes are especially attractive for soft heavy metal ions (in particular, Hg 2þ (37,41,42,(50)(51)(52)(53)). By contrast, a somewhat harder electron donor, O-dansyl group shows greater tendency for coordination of intermediate in softness transition metal ions such as Cu 2þ (56).…”

“…Very recently, a rigid analogue 3 of mobile fluoroionophore 1 preorganised in the cone conformation for improved Hg 2þ sensing has been reported by our research group (42). During the synthesis, the ligand was found to possess strong affinity for Na þ and due to this, it was isolated, characterised and further used in metal ion recognition studies as a disodium salt of the di-ionised calixarene di(N-dansylcarboxamide) ( Figure 1).…”