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US 12,103,910 B1Granted
Process for making selective organoselenium-based ligands
AssigneeKing Faisal University
InventorsHany Mohamed Abd El-Lateef Ahmed, Saadeldin Elsayed Ibrahim Shabaan, Mai Mustafa Khalaf Ali, Mohamed Gouda, Wael I. Mortada
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Abstract
Novel organoselenium selective ligands are presented and designed to determine metal ions in a sample. These ligands are used as complexing agents in a dispersive liquid-liquid microextraction procedure of copper and zinc ions. The procedure has a shortened extraction time, minimal organic solvent types, and lower amounts of solvents, as well as easy operation and high enrichment efficiency.
Claims1
A process for making an organoselenium compound, comprising reacting a diselenide compound of the formula:
- with R—Br in the presence of ethanol, NaBH4, and N2 to obtain a compound of the formula:
- which compound in turn is reacted with, in the presence of toluene, a compound of the formula:
- wherein
- each X is the same and is hydrogen, fluorine, chlorine, or bromine;
- and
- R is ethyl or phenethyl, wherein the organoselenium compound is selected from the group consisting of:
3 more elements
Dependencies are inferred from the claim text.