Patent ID: 11905373
Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 2:
3. A process for preparing the two-dimensional monomer according to claim 1, the process comprising:
(i) charging hexaaminobenzene (HAB) and an anhydride compound in a DMSO solvent to obtain a reaction mixture, the anhydride compound having formula (1):, where:
ring A is a 5-membered ring or a 6-membered ring;
when ring A is a 5-membered ring, the ring A is fused with a benzene ring at a dotted bond of the ring A; and
when a ring A is a 6-membered ring, the ring A is fused with two fused benzene rings at two dotted bonds of the ring A;

(ii) refluxing the reaction mixture under argon atmosphere for 20 hours to 24 hours;
(iii) distilling the reaction mixture at 170° C. to 190° C. and 0 atm to 5 atm pressure to obtain a solid;
(iv) centrifuging the solid obtained from (iii) and washing the solid with water and acetone solvent;
(v) performing a soxhlet extraction on the solid obtained from (iv) with water, methanol, and acetone for 35 hours to 40 hours; and
(vi) drying the solid obtained from (v) under vacuum at 80° C. to obtain the two-dimensional organic monomer having formula (M).