“Stereoscopic” 2D super-microporous phosphazene-based covalent organic framework: Design, synthesis and selective sorption towards uranium at high acidic condition

Zhang, Shuang; Zhao, Xinqing; Li, Bo; Bai, Chiyao; Li, Yang; Wang, Lei; Wen, Rui; Zhang, Meicheng; Ma, Lijian; Li, Shoujian

doi:10.1016/j.jhazmat.2016.04.031

Cited by 158 publications

(63 citation statements)

References 60 publications

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“…have reported the application of a porous phosphazene‐based crosslinked polymer for effective extraction of uranium ions from water. The hybrid polymer was prepared by reacting HCCP with phenylenediamine, hydroquinone and phloroglucinol . Mohanti et al.…”

Section: Introductionsupporting

confidence: 77%

“…Nevertheless,t he use of phosphazene cyclomatrixm aterials for adsorption of metal ions has not been adequately addressed so far.O zcan et al have reported the synthesis of phosphazene microspheres by reacting hexachlorocycltriphosphazene( HCCP) or octachlorocycltetraphosphazene (OCCP) with diaminodiphenylmethane [51] and demonstrated their use for removal of Pb 2 + ions from water.L iet alh ave reported the application of ap orousp hosphazene-based crosslinked polymerf or effective extraction of uraniumi ons from water.T he hybrid polymer was prepared by reacting HCCP with phenylenediamine, hydroquinone and phlorogluci-nol. [52,53] Mohanti et al have used cyclotriphosphazene and trialkoxysilyl groups for the preparation of porous silica for adsorptiono fC r 2 O 7 2À ions, despite the relativelyl ow surface area. [54][55][56] In this study,w ep resent the synthesis of an ew hybrid material from the reaction of octavinylsilsesquioxane (OVS) with hexa(4-bromophenoxy)-cyclotriphosphazene using Pd(OAc) 2 /(o-CH 3 Ph) 3 Pa st he catalyst.…”

Section: Introductionmentioning

confidence: 99%

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A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Soldatov

Liu

2019

Chemistry An Asian Journal

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The development of adsorptive materials continues to be an important area of research for removal of heavy metal ions from waste water. The adsorption capacity can be modulated by both physical and chemical modification of the adsorbent. Herein, we combine the unique properties of polyhedral oligomeric silsesquioxane (POSS) and organocyclophosphazene as the building units to synthesize a hybrid porous material, abbreviated as PN‐POSS. The synthetic method follows a Heck reaction between hexa(4‐bromophenoxy)cyclotriphosphazene and octavinylsilsesquioxane (OVS). The Brunauer–Emmett–Teller (BET) analysis shows that the material possesses micro‐ and mesopores of 1.5 and 3.8 nm size and a surface area on the order of 500 m2 g−1. These attributes in combination with the donor ability of the phosphazene units qualify the material for high adsorption of Pb2+, Hg2+ and Cu2+ ions with maximal adsorption capacities on the order of 1326, 1927 and 2654 mg g−1, respectively. The adsorbent exhibits a good regeneration performance and can be effectively used for water treatment.

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Soldatov

Liu

2019

Chemistry An Asian Journal

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“…Highly crosslinked polyphosphazene nano/micro materials, a kind of novel versatile hybrid material referring to polymers synthesized via polycondensation between hexachlorotriphosphazene (HCCP) and polyamino (or polyhydroxyl) monomers, have been designed for use in cell imaging, drug delivery, sensing, and ecological environment . The polyphosphazenes have special characteristics including highly crosslinked structure, water and organic media dispersibility, and biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of amino‐functionalized polyphosphazene microspheres and their application for highly sensitive fluorescence detection of Fe³⁺

Chen

Liu

et al. 2020

J of Applied Polymer Sci

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Amino-functionalized highly crosslinked organic-inorganic hybrid polyphosphazene microspheres were prepared via a one-pot polycondensation method and served as a fluorescent sensor for the detection of Fe 3+ in solution. With the introduction of p-phenylenediamine unites, the polyphosphazene microspheres could be endowed with fluorescent property and abundant active amino groups on the surface. The microspheres were further used as the fluorescent sensor for the detection of Fe 3+ . Fluorescence study showed high sensing sensitivity and selectivity of the microspheres, and the limit of detection was determined as 0.076 μM for Fe 3+ . Active amino groups on the surface could efficiently improve the detection sensitivity of Fe 3+ . Moreover, highly crosslinked organic-inorganic hybrid structure was beneficial to the photostability and thermostability, enabled the microspheres to be possible for constructing practicable sensors. This work is expected to inspire the design of advanced polyphosphazene-based fluorescent sensors for applications in analytical detection.

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“…24,25 COFs also offer a platform for designing versatile materials for addressing environmental issues. [26][27][28][29][30][31][32][33] Meanwhile, there have been insufficient promising results on this important topic. COFs can be readily prepared and modified by designing suitable precursors and reactions.…”

Section: Introductionmentioning

confidence: 99%

Phosphonate-Decorated Covalent Organic Frameworks for Actinide Extraction: A Breakthrough Under Highly Acidic Conditions

Yu¹,

Yuan²,

Wang³

et al. 2019

CCS Chem

105

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Although solid-phase extraction is a useful approach for metal ion separation from aqueous solutions, existing sorbents suffer from low extraction efficiencies and/or instability when in contact with strong acidic media. We report here the first study on rational design and fabrication of phosphonatedecorated covalent organic frameworks, COF-IHEP1 and COF-IHEP2, for efficient and selective extraction of of uranium (VI) [U(VI)] and plutonium(IV) [Pu(IV)] from highly acidic solutions. We found that the negatively charged frameworks with excellent stability under harsh conditions and strong chelating ability from incorporated phosphonate moieties make the COFs superb U(VI) and Pu(IV) sorbents. In 1 M HNO 3 solution, COF-IHEP1 achieved recorded U(VI) uptake of 112 mg•g −1 , with extremely high selectivity toward Pu(IV) even in the presence of large excess of competing metal cations. Our mechanistic study confirms a sandwich-type microstructure of hydrated U(VI) and Pu(IV) cations bound by the oxygen sites of phosphonate groups. These newly fabricated tailored hybrid porous materials could afford new opportunities to achieve highly efficient actinide extraction from acidic nuclear fuel effluents.

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“Stereoscopic” 2D super-microporous phosphazene-based covalent organic framework: Design, synthesis and selective sorption towards uranium at high acidic condition

Cited by 158 publications

References 60 publications

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Facile synthesis of amino‐functionalized polyphosphazene microspheres and their application for highly sensitive fluorescence detection of Fe³⁺

Phosphonate-Decorated Covalent Organic Frameworks for Actinide Extraction: A Breakthrough Under Highly Acidic Conditions

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“Stereoscopic” 2D super-microporous phosphazene-based covalent organic framework: Design, synthesis and selective sorption towards uranium at high acidic condition

Cited by 158 publications

References 60 publications

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Facile synthesis of amino‐functionalized polyphosphazene microspheres and their application for highly sensitive fluorescence detection of Fe3+

Phosphonate-Decorated Covalent Organic Frameworks for Actinide Extraction: A Breakthrough Under Highly Acidic Conditions

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Facile synthesis of amino‐functionalized polyphosphazene microspheres and their application for highly sensitive fluorescence detection of Fe³⁺