Back Cover: A Porous Organic Polymer Nanotrap for Efficient Extraction of Palladium (Angew. Chem. Int. Ed. 44/2020)

Aguila, Briana; Sun, Qi; Cassady, Harper C.; Shan, Chuan; Liang, Zhiqiang; Al-Enizic, Abdullah M.; Nafady, Ayman; Wright, Joshua; Meulenberg, Robert W.; Ma, Shengqian

doi:10.1002/anie.202011451

Cited by 5 publications

(4 citation statements)

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“…Fe(III), Ni(II), Pb(II), Zn(II), and Cd(II) ions prevalent in waste products often coexist with Pd(II), which may affect the adsorption of Pd(II). , Therefore, we investigated the adsorption selectivity of PAF-1-N 4 for Pd(II). From Figure a, PAF-1-N 4 exhibited the recovery rates for Fe(III) and Zn(II) at 13.44 and 13.23%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Rapid and deep removal of palladium ions was achieved due to the interaction of ortho-amino and pyridine monomers. After 3 h of adsorption, the concentration of palladium ions was reduced to 0.29 ppb . Zhang’s group modified the ligand with a clamp-type tridentate structure composed of three nitrogen atoms on polyacrylonitrile fiber carrier, showing good coordination affinity for heavy metal ions .…”

Section: Introductionmentioning

confidence: 99%

“…After 3 h of adsorption, the concentration of palladium ions was reduced to 0.29 ppb. 13 a clamp-type tridentate structure composed of three nitrogen atoms on polyacrylonitrile fiber carrier, showing good coordination affinity for heavy metal ions. 14 Inspired by these works, we suspect that the interaction of multiple binding sites with palladium ions is stronger than that of a single site, and a more ideal palladium adsorption performance can be obtained.…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Zhao

et al. 2022

ACS Appl. Nano Mater.

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Effective extraction of palladium from secondary resources is a promising solution for the sustainable utilization of precious metals. A cyclic molecule containing four N atoms was modified on a nanoporous aromatic framework (PAF) to give PAF-1-N 4 , which provided a meaningful route to introduce bulky molecules with multiple coordination sites into the PAF materials. Through the interaction of multiple binding sites to Pd(II), PAF-1-N 4 showed rapid and deep adsorption of Pd(II) at a low initial concentration. The maximum Pd(II) adsorption capacity of PAF-1-N 4 reached 299.4 mg g −1 , and PAF-1-N 4 reduced the concentration of Pd(II) from 5.35 ppm to 84 ppb within 5 min and finally to 42 ppb within 60 min. After the in situ reduction, the obtained Pd@ PAF-1-N 4 exhibited good catalytic activity and reusability for the Suzuki−Miyaura coupling reaction in five-cycle catalytic experiments, thus realizing its sustainable utilization of palladium extracted from secondary resources.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Zhao

et al. 2022

ACS Appl. Nano Mater.

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“…Nitrogen-containing polymers, ranging from natural macromolecules including polypeptides, proteins, DNA, and RNA to synthetic polymers such as polyamines, polyamides, polyimides, polyureas, polyurethanes, polyanilines, polypyrroles, and cationic polyelectrolytes, are a large group of fascinating materials with adjustable mechanical, electrical, and coordination properties, which are widely applicable in noble metal extraction, photoluminescence (PL), elastomers, solar cells, bioimaging, CO 2 capture, self-healing materials, , and photo-responsive materials . Nitrogen-containing synthetic polymers are generally prepared from nitrogen-containing organic small molecular monomers or precursors such as amines, isocyanates, isocyanides, and nitriles, the generations of which usually involve the amination reaction with ammonia gas or the aqueous solution of ammonia at harsh conditions including high pressure and elevated temperatures, − causing operational inconvenience and potential danger.…”

Section: Introductionmentioning

confidence: 99%

Cu(I)-Catalyzed Heterogeneous Multicomponent Polymerizations of Alkynes, Sulfonyl Azides, and NH₄Cl

Huang

et al. 2020

Macromolecules

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Nitrogen-containing polymers are a group of fascinating materials, which are usually prepared from nitrogen-containing organic monomers produced from NH3 gas or aqueous solution of ammonia. The direct utilization of safe, clean, convenient, and inexpensive inorganic NH4Cl salt as a nitrogen source for the construction of functional polymers is highly desired but challenging. Multicomponent polymerizations, with their strong designability, structural diversity, high efficiency, simple procedure, and environmental benefit, have been proven to be powerful tools to efficiently convert simple monomers to complex polymer materials. In this work, Cu(I)-catalyzed multicomponent polymerizations of alkynes, sulfonyl azides, and NH4Cl are developed, utilizing simple inorganic NH4Cl salt to serve as a monomer for the preparation of functional poly(sulfonyl amidine)s. The heterogeneous polymerization goes smoothly at room temperature in CH2Cl2/tetrahydrofuran, which is also applicable to a range of different monomer structures, affording seven poly(sulfonyl amidine)s with high yields (up to 96%) and high molecular weights (up to 47,100 g/mol). Unique functionalities such as photophysical properties and metal ion detection can be introduced to the poly(sulfonyl amidine)s either from monomer structures or the in situ generated product structures, rendering them as selective and sensitive fluorescence sensors for Ru3+. This multicomponent polymerization showed high synthetic efficiency with environmental and economic benefit, which has opened up a feasible synthetic method of using inorganic NH4Cl salt instead of organic amines, isocyanates, isocyanides, or nitriles to construct nitrogen-containing polymers, demonstrating a promising synthetic approach for the synthesis of advanced functional polymer materials.

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Helicene Covalent Organic Frameworks for Robust Light Harvesting and Efficient Energy Transfers

Yin,

Ye,

Tao

et al. 2024

Angewandte Chemie

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Helicenes represent a class of fascinating π compounds with fused yet folded backbones. Despite their broad structural diversity, harnessing helicenes to develop well‐defined materials is still a formidable challenge. Here we report the synthesis of crystalline porous helicene materials by exploring helicenes to synthesize covalent 2D lattices and layered π frameworks. Topology‐directed polymerization of [6]helicenes and porphyrin creates 2D covalent networks with alternate helicene‐porphyrin alignment along the x and y directions at a 1.5‐nm interval and develops [6]helicene frameworks through reversed anti‐AA stack along the z direction to form segregated [6]helicene and porphyrin columnar π arrays. Notably, this π configuration enables the frameworks to be highly red luminescent with benchmark quantum yields. The [6]helicene frameworks trigger effieicnt intra‐framework singlet‐to‐singlet state energy transfer from [6]helicene to porphyrin and facilitate intermolecular triplet‐to‐triplet state energy transfer from frameworks to molecular oxygen to produce reactive oxygen species, harvesting a wide range of photons from ultraviolet to near‐infrared regions for light emitting and photo‐to‐chemical conversion. This study introduces a new family of extended frameworks, laying the groundwork for exploring well‐defined helicene materials with unprecedented structures and functions.

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Back Cover: A Porous Organic Polymer Nanotrap for Efficient Extraction of Palladium (Angew. Chem. Int. Ed. 44/2020)

Cited by 5 publications

References 0 publications

Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Cu(I)-Catalyzed Heterogeneous Multicomponent Polymerizations of Alkynes, Sulfonyl Azides, and NH₄Cl

Helicene Covalent Organic Frameworks for Robust Light Harvesting and Efficient Energy Transfers

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Back Cover: A Porous Organic Polymer Nanotrap for Efficient Extraction of Palladium (Angew. Chem. Int. Ed. 44/2020)

Cited by 5 publications

References 0 publications

Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Nanoporous Aromatic Framework with Bulky Binding Groups for Palladium Recovery

Cu(I)-Catalyzed Heterogeneous Multicomponent Polymerizations of Alkynes, Sulfonyl Azides, and NH4Cl

Helicene Covalent Organic Frameworks for Robust Light Harvesting and Efficient Energy Transfers

Contact Info

Product

Resources

About

Cu(I)-Catalyzed Heterogeneous Multicomponent Polymerizations of Alkynes, Sulfonyl Azides, and NH₄Cl