Easy Fabrication of Amorphous Covalent Organic Nanospheres Using Schiff‐Base Chemistry for Iodine Capture

Sun, Junyong; Zhang, Rongchao; Yao, Genxiu; Zhang, Qiang; Gao, Feng

doi:10.1002/asia.202101214

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…In all the above-mentioned cases, surface as well as inclusion-based iodine transfer is likely to occur even with a less porous nature of the framework . From the results of multiphase iodine transfer studies conducted with 1 and 2 , it can be inferred that the uptake values in this work are better than many MOFs, POPs, and zeolites (Table S1) − ,− For instance, the values of vapor phase iodine mass transfer for a T -SCNU-Z6 and a W -SCNU-Z6 are 2.05 g g –1 and 5.04 g g –1 , respectively, whereas, those for HSB-W8 and Co-IPT-IBA are 2.32 g g –1 , and 2.88 g g –1 , respectively. Compared to this, ionic iodine transfer studies in the aqueous phase are rare.…”

Section: Resultsmentioning

confidence: 80%

Impact of Conformational Isomerism in Two Zn-MOFs on the Multimedia Incarceration of Iodine: In-Depth Experimental and Computational Assessments

Bhambri,

Mandal

2023

ACS Appl. Energy Mater.

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Owing to the accelerating demand for energy production using nuclear power, the risk has risen of radionuclide outbreak, which caused several irreparable damages in the past. Thus, various porous materials have been utilized to showcase iodine capture in different media. In this work, two Zn-based metal organic frameworks (MOFs) that are conformational isomers, {[Zn(bpaipa)]•DMF•2H 2 O} n (1) and {[Zn(bpaipa)]•5H 2 O} n (2), with varying polarizing tendencies were utilized for incarcerating iodine molecules at high uptake values from different iodine reservoirs, i.e., at elevated temperatures, and aqueous and organic media. At elevated temperatures (e.g., 75 °C), quite a large amount of iodine vapors transferred to 1 and 2 (2.95 g g −1 and 4.51 g g −1 , respectively). Being stable in an aqueous medium, both MOFs performed well by transferring 2.38 (±0.049) g g −1 (by 1) and 2.9 (±0.015) g g −1 (by 2) of I 3 − from the ionic iodine reservoir. In addition to this, a real-time matrix was also taken for an aqueous iodine reservoir in which the materials worked remarkably. The organic phase iodine transfer has also been studied by both MOFs. For all the cases, a systematic kinetic study has been conducted. The results show that their structural distinctiveness plays a crucial role in the unprecedented comparative study of mass transfer from all three iodine reservoirs. On account of the sorbent's polarizing capacity, a detailed explanation is provided using thermogravimetric analysis, Raman, and X-ray photoelectron spectroscopy. Insights into the interactive modes between iodine (in both neutral and ionic forms) and 1 and 2 are critically evaluated using configurational bias Monte Carlo simulations. Furthermore, 1 and 2 are found to be reversible in iodine capture and release as well as recyclable and stable under the experimental conditions. For a very high uptake in the vapor phase and its room-temperature synthesis, 2 is an exceptional candidate for efficient and reusable sequestering of iodine in long-term and real-time situations.

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Section: Resultsmentioning

confidence: 80%

Impact of Conformational Isomerism in Two Zn-MOFs on the Multimedia Incarceration of Iodine: In-Depth Experimental and Computational Assessments

Bhambri,

Mandal

2023

ACS Appl. Energy Mater.

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“…The latter technique, which employs porous materials, is considered the most promising due to its high adsorption capacity, versatile use, and economic feasibility [13][14][15][16][17]. As a result, myriad porous materials have been synthesized and tested for iodine capture, including, among others, activated carbon [18], metalorganic framework structures (MOF) [19,20], organic polymers [21,22], covalent organic frameworks (COFs) [23,24] and amorphous materials [25,26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Iodine Adsorption Properties of Organometallic Copolymers with Propeller-Shaped Fe(II) Clathrochelates Bridged by Different Diaryl Thioether and Their Oxidized Sulfone Derivatives

2022

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Three organometallic copolymers, ICP1-3, containing iron(II) clathrochelate units with cyclohexyl lateral groups and interconnected by various thioether derivatives were synthesized. The reaction of the latter into their corresponding OICP1-3 sulfone derivatives was achieved quantitatively using mild oxidation reaction conditions. The target copolymers, ICP1-3 and OICP1-3, were characterized by various instrumental analysis techniques, and their iodine uptake studies disclosed excellent iodine properties, reaching a maximum of 360 wt.% (qe = 3600 mg g−1). The adsorption mechanisms of the copolymers were explored using pseudo-first-order and pseudo-second-order kinetic models. Furthermore, regeneration tests confirmed the efficiency of the target copolymers for their iodine adsorption even after several adsorption-desorption cycles.

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“…These uptake values are comparable or better (in some cases) than those exhibited by other porous materials reported in the literature (Table S3). − ,− Further, the thermogravimetric profiles reveal an apparent weight loss of 45.5% for I 2 @1a (Figure d) and 44% for I 2 @2a (Figure e) in the range 30–225 °C.…”

Section: Resultsmentioning

confidence: 94%

Two Metal–Organic Frameworks with a Fused Cis-Decalin Conformation for Multimedia Iodine Capture

Chanda,

Mandal

2024

Inorg. Chem.

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The extensive growth of nuclear power plants has a severe detrimental effect on human health and the surroundings due to the uncontrolled and unfiltered release of radioactive wastes into the environment. One such radioactive waste is 129 I which has a fatal effect when released into the air or water bodies. Hence, molecular and ionic iodine capture from multimedia has become an important area of interest in the recent past. This work is aimed at introducing two 2D metal−organic frameworks with a fused cis- 2), synthesized at room temperature utilizing a combination of M(OAc) 2 •2H 2 O (M: Zn/ Cd), a neutral flexible ligand, tpbn, and a simple commercially available furan dicarboxylate, fdc 2− , for the target application. The polarizing nature of the furan moieties and the oxygen rich pores in 1 and 2 facilitate the easy capture of molecular iodine from both the vapor phase and aqueous media with high uptake values. Furthermore, their efficiency was tested for the practical application under real-world conditions using river and seawater. In addition to confirming their recyclability with the retention of structural integrity, the interaction between 1 and 2 with iodine has also been established with experimental and theoretical calculations.

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Easy Fabrication of Amorphous Covalent Organic Nanospheres Using Schiff‐Base Chemistry for Iodine Capture

Cited by 4 publications

References 38 publications

Impact of Conformational Isomerism in Two Zn-MOFs on the Multimedia Incarceration of Iodine: In-Depth Experimental and Computational Assessments

Impact of Conformational Isomerism in Two Zn-MOFs on the Multimedia Incarceration of Iodine: In-Depth Experimental and Computational Assessments

Synthesis and Iodine Adsorption Properties of Organometallic Copolymers with Propeller-Shaped Fe(II) Clathrochelates Bridged by Different Diaryl Thioether and Their Oxidized Sulfone Derivatives

Two Metal–Organic Frameworks with a Fused Cis-Decalin Conformation for Multimedia Iodine Capture

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