Highly Efficient Enrichment of Volatile Iodine by Charged Porous Aromatic Frameworks with Three Sorption Sites

Abstract

The targeted synthesis of a series of novel charged porous aromatic frameworks (PAFs) is reported. The compounds PAF-23, PAF-24, and PAF-25 are built up by a tetrahedral building unit, lithium tetrakis(4-iodophenyl)borate (LTIPB), and different alkyne monomers as linkers by a Sonogashira-Hagihara coupling reaction. They possess excellent adsorption properties to organic molecules owing to their "breathing" dynamic frameworks. As these PAF materials assemble three effective sorption sites, namely the ion bond, phenyl ring, and triple bond together, they exhibit high affinity and capacity for iodine molecules. To the best of our knowledge, these PAF materials give the highest adsorption values among all porous materials (zeolites, metal-organic frameworks, and porous organic frameworks) reported to date.

Tuning the adsorption and fluorescence properties of aminal‐linked porous organic polymers through N‐heterocyclic group decoration

“…Evidently, NAPOPs can bleach the solutions much faster than active carbon and 13X zeolite. Particularly, NAPOP-1 and 23 almost can bleach the solution completely within 12 h, which is also faster than that of CMP-E1, PAF-24, and NiP-CMP, 49,50 however, is slower than PAF-1 and JUC-Z2. 51 To evaluate the sorption quantity, the sorption behavior of solid NAPOP-3 toward I 2 vapor was investigated by exposing 30 mg solid adsorbent to a saturate vapor of 400 mg solid I 2 in a sealed vessel at 75 8C.…”

Trends and challenges for microporous polymers

“…14). 210 The negatively charged polymers exhibited moderate S BET ranging between 82 and 262 m 2 g À1 and proved to be applicable for the capture of volatile iodine. Apart from the Sonogashira-Hagihara coupling reaction other transformations are possible to generate anionic microporous structures.…”

Synthesis and Characterization of Functional Triphenylphosphine‐Containing Microporous Organic Polymers for Gas Storage and Separation

“…The CO 2 uptake of 2.61 mmol g −1 for TBPPO‐TEPA is higher than that of many reported triphenylphosphine‐containing nonionic microporous polymer networks, and comparable to the hypercrosslinked porous polymers embedded by phosphonium salt (9.6–12.5 wt%) at the same conditions . Considering the moderate BET surface areas, these polymer networks still demonstrate higher CO 2 uptake ability under the same conditions compared to other alkyne‐bridged conjugated microporous polymers (CMPs) with similar BET surface areas . To determine the binding affinity of the polymers and CO 2 molecules, the isosteric heats of adsorption ( Q st ) for CO 2 were calculated using Clausius–Clapeyron equation from CO 2 adsorption data collected at 273 and 298 K. As shown in Figure , the Q st values of the polymer networks were found to be in the range from 26.1 to 28.9 kJ mol −1 at the near zero‐coverage, which are suitable for postcombustion CO 2 capture because the desorption of CO 2 will be facilitated without an obvious energy penalty.…”