Pillar[5]arene-based cross-linked polymer for the rapid adsorption of iodine from water and vapor phases

Stilbene-Cross-Linked Pillar[5]arene-Based Polymer for Efficient Iodine Vapor Capture and Adsorption from Water

“…Pillar[5]­arenes are well-known supramolecular hosts for a variety of guests. Recently, we have demonstrated a pillar[5]­arene-based mesitylene-cross-linked polymer as an adsorbent for the rapid removal of iodine from an aqueous solution . The synthesized polymers have the following characteristics which make them capable of being explored as adsorbent materials for the adsorption of molecular iodine: (i) guest binding propensities of P­[5]­A , (ii) high thermal stability, (iii) π-electron-rich intrinsic and extrinsic permanent porosity, and (iv) moderate surface area.…”

“…In recent years, several macrocycles with well-known guest recognition properties such as crown-ethers, cyclodextrins, , calix­[n]­arenes, calix[4]­pyrrole, porphyrin, − and pillar­[n]­arenes − were anchored on polymeric materials and were studied for their adsorption properties to remove micropollutants from water. To date, to develop efficient and promising adsorbents for environmental remediation applications, a great number of porous organic materials with high porosity, lightweight, excellent stability, and tunable functionality have been developed. − A porous organic material includes covalent organic frameworks (COFs), − organic molecular cages, , and POPs. − COFs are crystalline, and the cavities in COFs can be tuned by appropriately changing the linker units so as to use them for desired applications.…”

Tröger’s Base-Enriched Conjugated Cyclopentannulated Copolymers: Prominent Adsorbents of CO2, H2, and Iodine

“…30 To mitigate these challenges, conventional methods, like wet scrubbing and physical adsorption, have been extensively utilized to remove radioiodine vapors through filtration, 31,32 with the latter technique using porous materials promising to be advantageous as a result of its structural diversity, affordability, outstanding stability, and capability to control its porosity at the atomic and molecular levels. 33,34 Consequently, a myriad of iodine adsorbents have been made, which could be grouped into different categories, namely, organic, 35 inorganic, 36 and hybrid 37 polymer networks. Organic-based materials emerge as prominent candidates for effective capture of iodine as a result of their versatile synthesis, extensive porous network, and stability.…”

“…Conversely, the substantial release of radioactive nuclear waste, encompassing elements, such as 90 Sr, 99 Tc, 137 Cs, 129 I, 127 Xe, 85 Kr, poses a major drawback to nuclear power. , Of major concern are the gaseous radioactive iodine pollutants, namely, 131 I (half-life of 8 days) and 129 I (half-life of 15.7 million years), which perpetrate severe health issues for humans and are considered to have detrimental effects on the environment . To mitigate these challenges, conventional methods, like wet scrubbing and physical adsorption, have been extensively utilized to remove radioiodine vapors through filtration, , with the latter technique using porous materials promising to be advantageous as a result of its structural diversity, affordability, outstanding stability, and capability to control its porosity at the atomic and molecular levels. , Consequently, a myriad of iodine adsorbents have been made, which could be grouped into different categories, namely, organic, inorganic, and hybrid polymer networks. Organic-based materials emerge as prominent candidates for effective capture of iodine as a result of their versatile synthesis, extensive porous network, and stability. , …”

Tetraethylene glycol-based polymer networks for the efficient removal of radioactive methyl iodide and iodine vapor

“…Electron-rich and easy-tosynthesize pillar [5]arene (P[5]A) was introduced to the polymer to adjust the hydrophilicity and improve the I 2 adsorption capacity. [37][38][39][40][41][42][43][44][45] Two monomers, ATTEG-P5A and ATTEG, and a flexible cross-linker, DATTEG, were synthesized for one-pot copolymerization in N,N-dimethylformamide (DMF) initiated by azoisobutyronitrile (AIBN) (Schemes S1, S2 and Fig. S1-S15 †).…”