An azo-linked porous triptycene network as an absorbent for CO<sub>2</sub> and iodine uptake

Dang, Qin-Qin; Wang, Xiaomin; Zhan, Yu-Fen; Zhang, Xian‐Ming

doi:10.1039/c5py01671a

Cited by 125 publications

(53 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Knowing that viologen species, [15] azo bonds [37,38] and phenyl rings [16] interact strongly with iodine, we decided to test our polymers as iodine sorbents. Significant amounts of iodine radionuclides (I 129 and I 131 )w ith half-lives of up to 15.7 million years are generated in nuclearp ower plants, [39] and these pose ag reat danger to the environment and human health if released.…”

Section: Iodine Capture With Cop1 and Cop2mentioning

confidence: 99%

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Škorjanc

Shetty

Sharma

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Owing to their chemical and thermal stabilities, high uptake capacities, and easy recyclability, covalent organic polymers (COPs) have shown promise as pollutant sponges. Herein, we describe the use of diazo coupling to synthesize two cationic COPs, COP1 and COP2 , that incorporate a viologen-based molecular switch and an organic macrocycle, calix[4]arene. The COPs form nanosheets that have height profiles of 6.00 nm and 8.00 nm, respectively, based on AFM measurements. The sheets remain morphologically intact upon one- or two-electron reductions of their viologen subunits. MD simulations of the COPs containing dicationic viologens indicate that the calix[4]arenes adopt a partial cone conformation and that, in height, the individual 2D polymer layers are 5.48 Å in COP1 and 5.65 Å in COP2 , which, together with the AFM measurements, suggests that the nanosheets are composed of 11 and 14 layers, respectively. Whether their viologens are in dicationic, radical cationic, or neutral form, the COPs exhibit high affinity for iodine, reaching up to 200 % mass increase when exposed to iodine vapor at 70 °C, which makes the materials among the best-performing nanosheets for iodine capture reported in the literature. In addition, the COPs effectively remove Congo red from solution in the pH range of 2-10, reaching nearly 100 % removal within 15 minutes at acidic pH.

show abstract

Section: Iodine Capture With Cop1 and Cop2mentioning

confidence: 99%

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Škorjanc

Shetty

Sharma

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Figure 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 9 corresponds to the methylidyne bridge carbons of the triptycene. 39 In addition, the resonance of quaternary carbon atoms of spirobifluorene-based units in the MOP-9 and MOP-10 ( Figure S5 and S6, Supporting Information) was also be detected at 65 ppm. 40 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 10 chlorine was introduced from the HCl aqueous solution at the washing process.…”

Section: Resultsmentioning

confidence: 95%

Facile Carbonization of Microporous Organic Polymers into Hierarchically Porous Carbons Targeted for Effective CO₂ Uptake at Low Pressures

Zhu

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The advent of microporous organic polymers (MOPs) has delivered great potential in gas storage and separation (CCS). However, the presence of only micropores in these polymers often imposes diffusion limitations, which has resulted in the low utilization of MOPs in CCS. Herein, facile chemical activation of the single microporous organic polymers (MOPs) resulted in a series of hierarchically porous carbons with hierarchically meso-microporous structures and high CO2 uptake capacities at low pressures. The MOPs precursors (termed as MOP-7-10) with a simple narrow micropore structure obtained in this work possess moderate apparent BET surface areas ranging from 479 to 819 m(2) g(-1). By comparing different activating agents for the carbonization of these MOPs matrials, we found the optimized carbon matrials MOPs-C activated by KOH show unique hierarchically porous structures with a significant expansion of dominant pore size from micropores to mesopores, whereas their microporosity is also significantly improved, which was evidenced by a significant increase in the micropore volume (from 0.27 to 0.68 cm(3) g(-1)). This maybe related to the collapse and the structural rearrangement of the polymer farmeworks resulted from the activation of the activating agent KOH at high temperature. The as-made hierarchically porous carbons MOPs-C show an obvious increase in the BET surface area (from 819 to 1824 m(2) g(-1)). And the unique hierarchically porous structures of MOPs-C significantly contributed to the enhancement of the CO2 capture capacities, which are up to 214 mg g(-1) (at 273 K and 1 bar) and 52 mg g(-1) (at 273 K and 0.15 bar), superior to those of the most known MOPs and porous carbons. The high physicochemical stabilities and appropriate isosteric adsorption heats as well as high CO2/N2 ideal selectivities endow these hierarchically porous carbon materials great potential in gas sorption and separation.

show abstract

“…Lately, the researching of porous materials for efficient capturing I 2 has attracted great attention because of the need to regularly remove long‐lived radioactive iodine isotopes (eg, 129 I or 131 I) from the waste gas of nuclear power plants . In this work, we used stable 127 I to substitute for radioactive 129 I and 131 I because these isotopic iodine elements have almost the same chemical behavior …”

Section: Resultsmentioning

confidence: 99%

The preparation of covalent triazine‐based framework via Friedel‐Crafts reaction of 2,4,6‐trichloro‐1,3,5‐triazine with N,N′‐diphenyl‐N,N′‐di(m‐tolyl)benzidine for capturing and sensing to iodine

Tong-mou

Liu

Zhang

et al. 2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

The covalent triazine-based framework (TDPDB) has been prepared by Friedel-Crafts polymerization reaction of N,N 0 -diphenyl-N,N 0 -di(m-tolyl)benzidine (DPDB) with 2,4,6-trichloro-1,3,5-triazine (TCT) catalyzed by methanesulfonic acid. The yield of the reaction (94.85%) is very high. TDPDB was provided with Brunauer-Emmett-Teller specific surface area of 592.18 m 2 g −1 and pore volume of 0.5241 cm 3 g −1 .TDPDB demonstrated an excellent capacity for capturing iodine (3.93 g g −1 ) and an outstanding ability to fluorescent sensing to iodine with Ksv of 5.83 × 10 4 L mol −1 . It also showed high fluorescent sensing sensitivity to picric acid. K E Y W O R D S covalent triazine-based frameworks, fluorescent sensing, Friedel-Crafts reaction, iodine uptake, methanesulfonic acid

show abstract

An azo-linked porous triptycene network as an absorbent for CO₂ and iodine uptake

Abstract: An azo-linked porous organic framework (Azo-Trip) in which triptycene is incorporated as linkage, has been constructed via a facile Zn-induced reductive homocoulping reaction. The Azo-Trip exhibits selective carbon dioxide uptake and excellent iodine uptake in vapour and liquid phase.

Cited by 125 publications

References 42 publications

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Facile Carbonization of Microporous Organic Polymers into Hierarchically Porous Carbons Targeted for Effective CO₂ Uptake at Low Pressures

The preparation of covalent triazine‐based framework via Friedel‐Crafts reaction of 2,4,6‐trichloro‐1,3,5‐triazine with N,N′‐diphenyl‐N,N′‐di(m‐tolyl)benzidine for capturing and sensing to iodine

Contact Info

Product

Resources

About

An azo-linked porous triptycene network as an absorbent for CO2 and iodine uptake

Abstract: An azo-linked porous organic framework (Azo-Trip) in which triptycene is incorporated as linkage, has been constructed via a facile Zn-induced reductive homocoulping reaction. The Azo-Trip exhibits selective carbon dioxide uptake and excellent iodine uptake in vapour and liquid phase.

Cited by 125 publications

References 42 publications

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Redox‐Responsive Covalent Organic Nanosheets from Viologens and Calix[4]arene for Iodine and Toxic Dye Capture

Facile Carbonization of Microporous Organic Polymers into Hierarchically Porous Carbons Targeted for Effective CO2 Uptake at Low Pressures

The preparation of covalent triazine‐based framework via Friedel‐Crafts reaction of 2,4,6‐trichloro‐1,3,5‐triazine with N,N′‐diphenyl‐N,N′‐di(m‐tolyl)benzidine for capturing and sensing to iodine

Contact Info

Product

Resources

About

An azo-linked porous triptycene network as an absorbent for CO₂ and iodine uptake

Facile Carbonization of Microporous Organic Polymers into Hierarchically Porous Carbons Targeted for Effective CO₂ Uptake at Low Pressures