Metal–Organic Framework Based Microcapsules

He, Ting; Xu, Xiaoyong; Ni, Bing; Lin, Haifeng; Li, Chaozhong; Hu, Wenping; Wang, Xun

doi:10.1002/anie.201804792

Cited by 82 publications

(48 citation statements)

References 43 publications

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“…This promotes the designing and preparation of high-performance adsorbent. [3][4][5] Up to now many kinds of adsorbent have been developed for iodine capture, including activated carbon, 6,7 zeolites, 8,9 metal organic frameworks (MOFs), [10][11][12] and so on. However, it is still a great challenge to develop effective and inexpensive adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Improving iodine adsorption performance of porous organic polymers by rational decoration with nitrogen heterocycle

Wang¹,

An²,

Zhang³

et al. 2020

J of Applied Polymer Sci

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Four kinds of porous aminal‐linked organic polymers (PAOPs) were synthesized via one‐step condensation between cheap melamine and respective aldehydes decorated with different nitrogen heterocycle, to evaluate the influence of nitrogen heterocycle on the adsorption performance of target polymer toward iodine. Though having the smallest surface area of 209.9 m2/g, PAOP‐4 decorated with pyridine group exhibits an adsorption capacity of 108 wt% (iodine/adsorbent weight%), surpassing other three PAOPs with Brunauer–Emmett–Teller area varying from 305.8 to 533.0 m2/g. Based on Raman spectral analyses, the characteristic band of I3− and I5− was used to evaluate the electronic interaction between iodine and the nitrogen heterocycle, giving an order of pyridine > tetrazole > pyrazole > imidazole. This manifests the vital role of chemical interaction playing in the iodine adsorption by PAOP‐4, which is much helpful for designing high‐performance organic adsorbent toward iodine.

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Section: Introductionmentioning

confidence: 99%

Improving iodine adsorption performance of porous organic polymers by rational decoration with nitrogen heterocycle

Wang¹,

An²,

Zhang³

et al. 2020

J of Applied Polymer Sci

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“…From the adsorption isotherm, the maximum adsorption capacity of THPS‐C for I 2 was calculated as 926 mg g −1 . Although this adsorption ability is not the highest in enriching iodine from water phase (2100 mg g −1 ), it is still higher than reported materials, metal−organic frameworks (MOFs) (880 mg g −1 ),25a nitrogen‐rich triptycene‐based porous polymer (NTP) (429 mg g −1 ), cadmium(II)‐triazole MOF(110 mg g −1 ) 25b. The good I 2 uptake ability of THPS‐C could be beneficial to apply practically in the future obviously.…”

Section: Resultsmentioning

confidence: 74%

Hyperporous Carbon from Triptycene‐Based Hypercrosslinked Polymer for Iodine Capture

Zhang

Zhai

Zhen

et al. 2019

Adv Materials Inter

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for removing iodine because of their porous structure, such as metal-organic frameworks (MOFs) [4] and porous organic polymers (POPs). [5] Although most of these organic or metallic hybrid materials have good chemical and thermal stability, they will inevitably be partially oxidized or carbonized under long-term high-temperature and oxidizing atmosphere in the process of iodine vapor capture. Comparatively speaking, hyperporous carbons by high-temperature pyrolysis are noted for their high surface areas, large pore volumes, and good chemical and thermal stability, and they may be promising adsorbents for iodine capture. [6] Hyperporous carbons can be prepared from various precursors including porous materials including MOFs and POPs and show good performance in the fields of gas storage, catalysts, and energy storage. [7][8][9] While, many of the porous precursors involved costly starting materials or expensive catalysts or rigorous reaction conditions for their preparation, which limit their large-scale applications. [10][11][12] Among POPs, hypercrosslinked polymers (HCPs) have obvious advantages of low cost and easy scalization. [13] However, such hyperporous carbons with high surface area and excellent chemical and thermal stability from HCPs precursors have not been reported in the field of iodine capture until now. Recently, we synthesized triptycene-based hypercrosslinked porous poly mer sponge (THPS) with superior adsorption capacities for organic solvents and dyes. [14] Herein, we further used THPS as precursor to prepared hyperporous carbon for iodine capture. Interestingly, the obtained hyperporous carbon (THPS-C) processes high surface area and large pore volume, and displays excellent adsorption ability for iodine vapor. Results and DiscussionThe hyperporous carbon THPS-C was prepared by treating THPS (Scheme 1) at 800 °C for 2 h under argon atmosphere using KOH as chemical activating agent in a mass ratio of 1:4 according to literature methods. [6a,8c] Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and highresolution transmission electron microscopy (HR-TEM) were utilized to confirm the structure and morphology of THPS-C. As shown in Figure 1a,b, THPS-C was composed of substantial irregular sphere particles. HR-TEM image revealed abundant micropores in THPS-C networks (Figure S1, Supporting Considering the nuclear fuel reprocessing conditions at 75 °C and the oxidizability of iodine, thermal and chemical stabilities are especially important for porous materials to enrich iodine. However, most organic or metal coordinated porous materials hardly meet this long-term demand. Here, highly porous carbon is prepared from pyrolysis at high temperature using triptycene-based hypercrosslinked polymer as precursor, and possesses high Brunauer-Emmett-Teller (BET) surface area of 3125 m 2 g −1 and pore volume of 1.60 cm 3 g −1 , and exhibits excellent iodine uptake ability of 340 wt% at 75 °C. Moreover, the obtained hyperporous carbon also displays remarkable capture efficiency of...

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“…Synthesis and Characterization of Test MOFs : Test MOFs were synthesized in a solvothermal reaction. [ 37 ] Briefly, aluminum sulfate (0.4 mmol), ruthenium (III) chloride hydrate (0.1 mmol), and 2‐aminoterephthalic acid (0.5 mmol) were dissolved in 50 mL N , N ‐dimethylformamide (DMF) at room temperature. The resulting solution was transferred to a 50 mL Teflon‐lined stainless‐steel autoclave and then heat‐treated at various temperatures (120–240 °C) for 10 h. The synthesized MOFs were separated by centrifugation at 7000 rpm for 10 min and then washed several times with deionized (DI) water and then ethanol.…”

Section: Methodsmentioning

confidence: 99%

Bioinspired Engineering of a Bacterium‐Like Metal–Organic Framework for Cancer Immunotherapy

Chen

Pan

Miao

et al. 2020

Adv Funct Materials

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Bacteria-mediated tumor therapy (BMTT) has been known for decades; however, its clinical use is inhibited by its association with infections. To address this issue, a spiky, bacterium-like metal-organic framework (MOF), which can replicate the functional responses of BMTT without its adverse side-effects, is proposed. MOFs are synthesized in a solvothermal reaction of aluminum sulfate, ruthenium chloride hydrate, and 2-aminoterephthalic acid; they have a spherical morphology or many nanospikes on their surfaces, depending on the reaction temperature. Both spherical and spiky MOFs can function as photothermal agents, converting absorbed optical energy into local heat. Owing to their higher surface area of interaction, spiky MOFs are more easily phagocytosed by macrophages than are spherical MOFs, strengthening their immune responses. Moreover, when injected intratumorally, spiky MOFs reside significantly longer than spherical ones, enabling their use in repeated photothermal treatments. The combination of in situ vaccination with intratumorally injected bacterium-like MOFs under exposure to an near-infrared laser and the immune checkpoint blockade of systemically administered αPD-1 is evaluated in tumor-bearing mice. The results indicate that the checkpoint blockade acts synergistically with in situ vaccination to provide diverse antitumor functions of BMTT, destroying a primary tumor and suppressing tumor recurrence and metastasis.

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Metal–Organic Framework Based Microcapsules

Cited by 82 publications

References 43 publications

Improving iodine adsorption performance of porous organic polymers by rational decoration with nitrogen heterocycle

Improving iodine adsorption performance of porous organic polymers by rational decoration with nitrogen heterocycle

Hyperporous Carbon from Triptycene‐Based Hypercrosslinked Polymer for Iodine Capture

Bioinspired Engineering of a Bacterium‐Like Metal–Organic Framework for Cancer Immunotherapy

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