US 12,234,243 B1
Diorganyl diselenide-clubbed quaternary purines as corrosion inhibitors
Saadeldin Elsayed Ibrahim Shabaan, Al-Ahsa (SA); Hany Mohamed Abd El-Lateef Ahmed, Al-Ahsa (SA); Tarek Ahmed Yousef, Riyadh (SA); and Ahmed S. M. Aljanabi, Al-Ahsa (SA)
Assigned to KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed by KING FAISAL UNIVERSITY, Al-Ahsa (SA)
Filed on Jan. 29, 2024, as Appl. No. 18/425,457.
Application 18/425,457 is a division of application No. 18/242,081, filed on Sep. 5, 2023.
Int. Cl. C07D 487/14 (2006.01); C09D 5/08 (2006.01); C09D 7/63 (2018.01); C23F 11/14 (2006.01)
CPC C07D 487/14 (2013.01) [C09D 5/086 (2013.01); C09D 7/63 (2018.01); C23F 11/149 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method of preventing corrosion of a metal, comprising applying an anticorrosion coating comprising a diorganyl diselenide-clubbed quaternary purine to the surface of the metal to form a self-healing diorganyl diselenides layer on the metal, wherein the metal is selected from the group consisting of steel, a steel alloy, iron, copper, and a combination thereof;
wherein the diorganyl diselenide-clubbed quaternary purine has the formula I:

OG Complex Work Unit Chemistry
wherein:
R1 and R2 are independently selected from the group consisting of C2-C3 alkyl and

OG Complex Work Unit Chemistry
R3 is selected from the group consisting of H, COOMe, and COOEt, and
R4 is selected from the group consisting of hydrogen, 4-NO2-C6H4, 4-F2-C6H4, and 4-MeO—C6H4.