Highly selective and sensitive fluorescent sensor: Thiacalix[4]arene-1-naphthalene carboxylate for Zn2+ ions

Supramolecular Luminescent Sensors

“…Of note, each analyte caused a unique fluorescence emission signal, with a 15 nm difference between the emission maxima, which enabled accurate differentiation between the two cations. The reported detection limit for Zn 2+ was 0.15 ppb, which is 2 to 3 orders of magnitude smaller than previously reported limits using monocalixarenes with iminophenolate pendant arms. − Naphthyl-bearing thiacalix[4]­arene, 37 (Figure ) was found by Darjee et al to be a selective sensor for zinc, even in the presence of other metal cations . The 1:1 host–guest system enabled a broad linear detection range for Zn 2+ (1 to 740 nM), and a binding constant was determined by Stern–Volmer analysis to be 3.16 × 10 5 M –1 .…”

“…1153−1155 Naphthyl-bearing thiacalix [4]arene, 37 (Figure 40) was found by Darjee et al to be a selective sensor for zinc, even in the presence of other metal cations. 1156 The 1:1 host−guest system enabled a broad linear detection range for Zn 2+ (1 to 740 nM), and a binding constant was determined by Stern−Volmer analysis to be 3.16 × 10 5 M −1 . Additional calixarene-based zinc sensors containing bispyridine and terpyridine units were developed by Zhang et al 1157 and Li et al 1158 The bispyridinemodified calixarenes 38 and 39 (Figure 40) formed 1:2 host− guest complexes with zinc, leading to unique emission changes.…”

Ameliorative effects of quercetin against bisphenol A-caused oxidative stress in human erythrocytes: anin vitroandin silico study

“…31,32 The MD simulations were performed on 2d60-bisphenol A, 2d60-quercetin, 3cynbisphenol A, and 3cyn-quercetin, for 10 ns long time intervals to analyse the stability of their structures and confirmations during the whole event. 33 Root mean square deviation (RMSD), root mean square fluctuation (RMSF), hydrogen bond, radius of gyration (R g ), histogram, and torsional evaluation measurements were carried out to predict the structural changes and dynamic fluctuations of the receptor-ligand complexes.…”

Synthesis and computational mechanistic studies of copper selective molecular receptor

“…[14] Molecular Dynamics Simulation, the structural stabilization and conformational change of used host-guest complexes were carried with specific. [15,16] Density functional theory (DFT) calculation of the metal complex (4MHEB_Cu 2+ ) and the energies of the ligands 4MHEB and metal ion Cu 2+ , were calculated. The absorption and emission spectra were calculated using TD-DFT level of theory.…”