Selective capture of volatile iodine using amorphous molecular organic solids

Abstract

A simple shape-persistent organic molecular container is capable of selective absorption and storage of I(2(g)) over water vapor and NO gas even in its amorphous solid state. In addition, the strongly associated I(2) can be efficiently released from the charged container in organic solvents under ambient conditions.

Capture and reversible storage of volatile iodine by porous carbon with high capacity

“…The R value was calculated to be 4.87 for AC and 3.64 for KOH-AC. The decrease of R value suggested the breakdown of aligned structural domains in the carbon matrix after KOH activation, resulting in randomly distributed graphene sheets in the structure, accordance with other work [7,30,31].…”

“…Recent researches on iodine adsorption and storage have mainly focused on the development of silver-loaded zeolites and various organic solids, including CMPs, MOFs, and POPs [2][3][4][5][6][7][8][9]. Interestingly, we found the iodine adsorption by the KOH-AC was highly efficient.…”

“…It should be noted that this value of 376 wt% for iodine trapping is the highest one for porous materials, to our best knowledge. With this value, KOH-AC could compete with silver-loaded zeolite, MOFs, CMPs, POPs [2][3][4][5][6][7][8][9], and so on. The XPS spectrum exhibited that the trapped iodine with a valence of zero loaded on KOH-AC, suggesting that the iodine species exists as I 2 (Fig.…”

“…Silver-based zeolites, metal-organic frameworks (MOFs), and covalently linked porous organic polymers (POPs) have been developed [2][3][4][5][6][7][8][9][10][11]. For example, Cooper et al described a strategy for efficient removal of iodine vapor using porous organic crystals [12].…”

Iodine and Halogen Bonding

“…one iodine atom of I 2 is halogen-bonded to a C 60 surface and the other to toluene, the shortest I⋅⋅⋅C distances being close to 3.1 Å in both cases. [87] the X-ray structure of an organic molecular container that was able to trap molecular I 2 . The XB acceptor is a cylindershaped dimer formed by two tripodal trisulfide precursors connected by three dynamic disulfide bonds.…”