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Mercury Ions Complexation with a Series of Heterocyclic Derivatives of 3-Hydroxychromone: Spectral Effects and Prospects for Ultrasensitive Hg2+Probing

“…This gives a possibility to apply these compounds as prospective fluoroionophores for qualitative and quantitative detection of metal ions in solutions. Thus, complex formation of 3HC derivatives has been investigated for Sc 3+ , Ga 3+ , Th 3+ , Al 3+ , Pb 2+ , Sn 2+ , Cu 2+ , , as well as iron ions, other transition metals cations, and several anions and neutral molecules. , A separate note should be made about the development of sensors for alkali and alkali-earth metals, which are particularly important for biological and biochemical applications. Several crown-containing 3HC derivatives have been suggested as a base for such sensors. ,− …”

Synthesis, characterization, and antioxidant activity of Zn2+ and Cu2+ coordinated polyhydroxychalcone complexes

“…There is a shift of the carbonyl stretch from 1640 to 1610 cm −1 for both ligands in the presence of copper, meaning that the bond strength of the C=O bond is weakened. This is a strong indication for a participation of the carbonyl moiety in the complexation process [ 40 ]. Additionally, a new band is observed at 500 cm −1 in the spectra of the two metal complexes.…”

2,2-Difluoro-4-phenyl-1,3,2-dioxaborolo[4,5-c]chromen-5-ium-2-ide

“…For intermolecular interactions, see: Choudhury & Guru Row (2004); Hunter et al (2001); Novoa et al (2006); Thalladi et al (1998). For the synthesis, see: Roshal et al (2002).…”

“…These compounds turned out to be convenient analytical probes because of their considerable ability to complex various chemical entities (molecules, ions) (Roshal et al, 1998;Roshal et al, 2003;Petković et al, 2010). The latter property was the reason for turning our attention to the possibility of applying of flavonol as an analytical spectral probe for boron compounds (Roshal et al, 2002). As part of these investigations we wanted to see how flavonol behaved in the presence of BF 3 .…”

“…The title compound was obtained during the reaction of 3-hydroxy-2-phenyl-4H-chromene-4-one (flavonol) with BF 3 (Roshal et al, 2002). Thus, boron trifluoride dissolved in anhydrous diethyl ether was added dropwise, with continuous…”