Pyridine-based covalent organic framework for efficient and selective removal of Hg(II) from water: Adsorption behavior and adsorption mechanism investigations

A water stable and highly fluorescent Zn(ii) based metal–organic framework for fast detection of Hg2+, CrVI, and antibiotics

“…So the ESP analysis has also well interpreted and supported the most favorable potential binding sites between the active electronegative nitrogen atom and Hg 2+ . 85…”

“…So the ESP analysis has also well interpreted and supported the most favorable potential binding sites between the active electronegative nitrogen atom and Hg 2+ . 85 For further exploration of the efficient electron transfer processes, sensors (1) and substrates (Hg@1) were fully optimized using the Gaussian16 program at the B3LYP/6-311G(d, p) + SDD basis set by the density functional theory method (DFT). As shown in Fig.…”

Dual-function Covalent Organic Polymers Rich in N, O, S Heteroatoms for Sensitive Detection and Efficient Capture of Mercury (II)

“…Figure 5a shows a result of 5 cycles of adsorption-regeneration test. After regeneration by 6 M HCl and neutral washing, the removal rates of HTDP-2 for Hg 2+ can remain above 88% during the following manifold cycles, re ecting the good stability and practical application potential of the adsorbent material in Hg 2+ capture [48][49][50][51].…”

A highly thermal and pH-stable fluorescence sensor for rapid detection of Hg2+, Fe3+, and tetracycline in aqueous solutions

“…So, the ESP analysis has also well interpreted and supported the most favorable potential binding sites between the active electronegative nitrogen atom and Hg 2+ . 75 Therefore, the N atom of amino groups can also provide a lone pair of electrons to form a coordination bond with the Hg 2+ ions, and the weak bond interaction can increase the electron energy level of the ligand and further prevent the energy transfer between the ligand and Hg 2+ , resulting in luminescence quenching. Based on the above findings, we can learn that interactions of -NH 2 groups to Hg 2+ ions induce the fluorescent turn-off behavior.…”