Carbazolic Porous Framework with Tetrahedral Core for Gas Uptake and Tandem Detection of Iodide and Mercury

Abstract

A multifunctional carbazolic porous framework (Cz-TPM), with a tetrahedral core, has been synthesized by FeCl oxidative coupling polymerization. The Brunauer-Emmett-Teller surface area of the obtained polymers reaches 713.2 m g. Gas adsorption isotherms show that Cz-TPM exhibits large carbon dioxide (97.9 mg g, 9.8 wt %, 273 K, and 1 bar) and hydrogen uptake capacities (149.3 cm g, 1.34 wt %, 77 K, and 1 bar). Furthermore, Cz-TPM has been found to display tandem visual detection of iodide and mercury, respectively. The Cz-TPM dispersion turns to yellow in the presence of iodide salts and subsequently changes to nearly colorless on addition of Hg salts that could be easily observed by the naked eye. Cz-TPM can detect I via "turn off" fluorescence quenching, and then the in situ generated Cz-TPM@I complexes can recognize Hg ions via "turn on" fluorescence recovery. More importantly, Cz-TPM is stable over common solvents and can be easily recovered by excessive water washing and centrifugation for further repeated use. As far as we know, carbazolic porous organic frameworks enabling detection of I and Hg have not been reported.

All‐in‐One: Sensing, Adsorptive Removal, and Photocatalytic Degradation of Nitro‐Explosive Contaminants by Microporous Polycarbazole Polymer

“…[ 38,39 ] A significant degree of hysteresis, similar to slit H4‐type, between adsorption and desorption step was observed in the entire range of partial pressure is corroborated to the presence of low degree of narrow mesoporosity including swelling of the polymeric network because of the presence of soft and flexible/non‐rigid adamantane moiety in the ACzMOP polymeric skeleton. [ 40–42 ] The steep increase of N 2 adsorption above the partial pressure range of 0.9 was observed, which may be originated in part from interparticulate mixed porosity associated with the meso‐ and macrostructures and voids among ACzMOP particles. The specific surface area was calculated applying Brunauer–Emmett–Teller (BET) model, [ 43 ] in which relative pressure range ( p / p 0 = 0.01 − 0.12) was determined according to the Rouquerol Plot, was found to be 1568 m 2 g −1 (Figures S6 and S7, Supporting Information).…”

In Situ Generation of AgI Quantum Dots by the Confinement of A Supramolecular Polymer Network: A Novel Approach for Ultrasensitive Response

“…Howbeit, excessive amounts of Ag + can cause great threat to human health . On the other hand, I − , the essential element of human life, is the raw material for synthesis of thyroid hormones . If the body lacks I − , it will not only affects physical and mental development but also induces thyroid cancer and cardiovascular disease .…”

“…[12] On the other hand, I À ,t he essential element of human life, is the raw materialf or synthesis of thyroidh ormones. [13] If the body lacks I À ,i tw ill not only affects physicala nd mental development but also induces thyroidc ancer and cardiovascular disease. [14] If intake of excessive I À in the humanb ody,i tc an cause thyroid hormone synthesis disorders, which can induce thyroiditis and thyroid cancer.…”

The Synthesis of Covalent Triazine‐Based Frameworks via Friedel–Crafts Reactions of Cyanuric Chloride with Thienyl and Carbazolyl Derivatives for Fluorescence Sensing to Picric Acid, Iodine and Capturing Iodine

“…[19] Although a few thiophene-and carbazole-POPs have been used for fluorescence sensing, their performances need to be improved. [20][21][22][23] In this manuscript, we try to use methanesulfonic acid as a catalyst to make cyanuric chloride reacts with tris[4-(2-thienyl)phenyl]amine (TPATTh) and tris(4-carbazoyl-9ylphenyl)amine (TPATCz) by Friedel-Crafts arylation reaction. Introduction of triazine rings into thiophene-and carbazolebased CTFs, the so-called covalent triazine-based frameworks, which increases the polarity of the frameworks to promote the flow of electrons, thereby the fluorescence sensing sensitivity of the materials to NACs and iodine will be enhanced.…”