Ag+ doped into azo-linked conjugated microporous polymer for volatile iodine capture and detection of heavy metal ions

Abstract

We herein report the construction of a novel azo-linked conjugated microporous polymers (Ag@AzoTPE-CMP), which possesses permanent porous structure and Ag+ loading up of 7.62% in the skeleton as effective sorption sites. Ag@AzoTPE-CMP shows considerable adsorption capacity of iodine of 202 wt% in iodine vapor at 350 K. In addition, Ag@AzoTPE-CMP can effectively remove heavy ions from ethanol-water solution.

Synthesis of conjugated polymers via cyclopentannulation reaction: promising materials for iodine adsorption

“…The 200 wt% iodine uptake value of CPP2 is superior to those of polymers reported in the literature, and notable among these are nitrogen-rich triptycene-based materials (NTP, 180 wt%), 59 calix [4]arene-based 2D macromolecules (CX4-NS, 114 wt%), 60 porphyrin and pyrene-based conjugated microporous polymers (Por-Py-CMP, 130 wt%), 61 nitrogen-containing materials (NRPPs, 192 wt%), 57 JLUE covalent organic polymer (JLUE-COP-3, up to 90.29%), 62 conjugated microporous polymers with thiophene units (SCMPs, 222 wt%), 34 hierarchically porous adamantane-based macromolecules (202 wt%), 63 triazine-based covalent frameworks (TTPT, 177wt%), 64 fluorine-enriched polymers (FCMP-600@1-4, up to 141 wt%) 65 and many others. 66,67 The iodine adsorbed by CPP1-3 could be released by simple heating of these latter polymers in air at 125°C. The complete 100% iodine desorption efficiency for the iodineloaded polymers (I 2 @CPP1-3) was recorded at different time intervals ( Fig.…”

Catalyst-free nitro-coupling synthesis of azo-linked conjugated microporous polymers with superior aqueous energy storage capability

“…Azo-linked CMPs could be prepared via two-step procedures from nitro monomers (Fig. 1b), including zinc-induced reductive homocoupling [31], copper(I)-catalyzed amino coupling [32], and electrophilic substitution of diazonium salts [33]. The as-obtained CMPs are amorphous in nature and mostly composed of particles measuring hundreds of nanometers in size.…”

A novel indole-based conjugated microporous polymer for highly effective removal of heavy metals from aqueous solution via double cation–π interactions

“… 20–23 Conjugated microporous polymers (CMPs) have many specific features such as large surface area, high porosity, adjustable pore size, thermal and chemical stability, showing great advantage in removal of heavy metals. 24–26 However, the inherent physisorptive metal-adsorption mechanism makes them inevitably suffer from low adsorption capacity and efficiency hence severely hampers their practical applications. Compared with adjusting the pore parameters and surface area, according to the recent research results, the incorporation of some specific functional groups or heteroatoms into the microporous framework to improve the heavy metals binding affinity has been revealed to be a simple and effective method to enhance the heavy metals adsorption capacity and efficiency.…”