Metal ion complexation in acetonitrile by upper-rim allyl-substituted, di-ionized calix[4]arenes bearing two dansyl fluorophores

Metal ion complexation in acetonitrile by upper-rim benzyl-substituted, di-ionized calix[4]arenes bearing two dansyl fluorophores

“…Earlier, we observed quenching with alkali metal cations for analogous allyl-substituted ligands. 16 As can be seen in Figure 3a, the largest red shift was produced by Li + . Similar results were obtained for alkali metal cations with L2 ( Figure 4a).…”

“…Previously, we obtained similar results with allyl groups on the upper rim. 16 The emission band intensity for L1 was diminished substantially with red shifts for the alkaline earth metal cations ( Figure 3b). .…”

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.…”

“…Thus, Bartsch and co-workers (45)(46)(47) focused their attention on investigation of the effect of other structural features of calix [4]arene di(Ndansylcarboxamides) on the optical sensing of metal ions. In particular, the influence of the upper-rim substituent variation on the complexation ability of the fluoroionophores was explored (45,46).…”

Synthesis of a Rhodamine-Appended Cyclophane as a Fluorescence Host in Water

“…Many types of fluorophore-appended macrocyclic hosts based on cyclodextrins [2], calixarenes [3], and cyclophanes [4] were widely investigated. Numerous successful studies of fluorophore-appended hosts based on these macrocyclic compounds were reported [5].…”