Highly efficient and reversible iodine capture using a metalloporphyrin-based conjugated microporous polymer

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Conjugated microporous polymers (CMPs) are advanced materials with high surface areas and tunable properties.
• Metalloporphyrins offer unique electronic and catalytic functionalities.
• Developing efficient materials for iodine capture remains a significant challenge.

Purpose of the Study:

• To synthesize and characterize a new metalloporphyrin-based conjugated microporous polymer (NiP-CMP).
• To evaluate the adsorption performance of NiP-CMP for iodine vapor and solution.
• To assess the stability and reversibility of iodine adsorption by NiP-CMP.

Main Methods:

• Homo-coupling polymerization reaction was employed for NiP-CMP synthesis.
• Brunauer-Emmett-Teller (BET) analysis was used to determine surface area.
• Iodine uptake experiments were conducted in both vapor and solution phases.

Main Results:

• NiP-CMP was successfully constructed with a high BET surface area (>2600 m(2) g(-1)) and large pore volume (2.288 cm(3) g(-1)).
• The material exhibited excellent guest uptake of 202 wt% for iodine vapor.
• Outstanding reversible adsorption performance for iodine in solution was observed.

Conclusions:

• NiP-CMP is a highly stable and porous material with significant potential for iodine capture.
• The polymer's structure facilitates efficient and reversible iodine adsorption from both vapor and solution.
• This metalloporphyrin-based CMP represents a promising candidate for iodine-related separation and storage technologies.