Porous organic polymers (POPs) are categorized as covalent organic porous materials with high porosity. They are composed of light elements (carbon, hydrogen, boron, nitrogen and oxygen) connected through strong covalent bonds. Friedel-Crafts reaction has been considered as one of the synthesis methods to prepare POPs. In this thesis, first, POPs based on fluorene, triphenylmethane and diphenylmethane were synthesized through Friedel-Crafts reaction with cyanuric chloride. Next, the synthesized fluorene-based POP was functionalized using ethylene diamine and then magnetized. Additionally, triphenylmethane-based POP was sulfonated using chlorosulfonic acid. The synthesized POPs were characterized using different analytical techniques. As the first project, the performance of the magnetized POP for absorption of four cationic and anionic dyes was eva‎luated. The obtained results demonstrated the superior performance of this POP for selective absorption of the cationic dyes. Its capacity for absorption of Basic blue 41, Basic red 46, Direct scarlet 4BS and Acid Naphthol 6B was measured as 379.78, 240.91, 40.28 and 32.13 mg/g, respectively. As the second project, the synthesized fluorene-based POP was used as an absorbent for iodine removal. This POP with absorption of 273 wt.% of iodine within 3 h was characterized with a high absorption rate. As the third project, the sulfonic groups-functionalized POP was studied as an absorbent for removal of cationic dyes and exhibited excellent performance for absorption of cationic dyes such as Basic blue 41 and Basic red 46 with maximum absorption capacity of 897.5 and 862.5 mg/g. As the forth project, the synthesized POP based on triphenylmethane and the one containing sulfonic acid groups were investigated as absorbents for iodine removal. The results showed the inferior performance of the POP with sulfonic acid groups for iodine absorption. In other words, sulfonic acid functional groups adversely affect the efficiency of iodine removal. As the fifth project, polysulfone was used as a matrix within which the synthesized triphenylmethane-based POP as additive was dispersed to prepare polymer beads via phase separation method. The prepared beads were characterized in terms of iodine absorption, which was positively affected by the additive loading. Additionally, the desorption kinetics proved the reversibility of iodine absorption using the prepared beads. As the sixth project, the synthesized diphenylmethane-based POP was eva‎luated for iodine removal. This POP with a porous structure containing nitrogen heteroatom and aromatic rings could absorb 289 wt.% iodine in a short time. The desorption kinetics investigation demonstrated the desorption of the absorbed iodine by 90% within 1 h.

محمد ديناري

عليرضا نجفي چهرمهيني

حسين توكل، عبدالرضا حاجي پور، امير عبدالملكي