Ionic organic cage-encapsulated metal clusters for switchable catalysis

Cao, Wu; Zhou, Jun‐Hao; Kochovski, Zdravko; Han, Moonsik; Gao, Zhiming; Sun, Jian‐Ke; Yuan, Jiayin

doi:10.1016/j.xcrp.2021.100546

Cited by 17 publications

(10 citation statements)

References 51 publications

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“…CC3 was synthesized following previous literature [21a,b] . The 1 H NMR spectrum of CC3 is shown in Figure S2 and matched with that previously reported in the literature.…”

Section: Methodsmentioning

confidence: 75%

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Zhao

Liu

Sun

2022

Chemistry A European J

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The effective capture of iodine with high volatility and poisonousness is significant for reprocessing the spent nuclear fuel. In this article, we report a hierarchically porous poly(ionic liquid)-organic cage composite membrane (PIL@CC3) possessing a gradient content distribution of CC3 cage crystals throughout the membrane to capture iodine vapor. The introduction of microporous CC3 can significantly enhance the uptake capacity of iodine up to 980 mg g À 1 , which is superior to that of a pristine PIL membrane carrying large meso-and macropores (99 mg g À 1 ), and CC3 crystalline powder (662 mg g À 1 ). Such enhanced performance benefits from the micro-meso-macroporous structure of the PIL@CC3 membrane in which the large meso-and macropores facilitate the mass transfer of iodine molecules from the external environment into the surface of the CC3 crystal, followed by diffusion of iodine molecules from the CC3 surface into the interior and exterior pores of the CC3 crystal. In addition, the asymmetric distribution of CC3 crystals across the PIL@CC3 membrane also displays its advantage in intercepting trace iodine, revealing its great potential for practical application. This study provides an idea for constructing hierarchically porous membrane composites for the removal of toxic vapors.

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“…CC3 was synthesized following previous literature [21a,b] . The 1 H NMR spectrum of CC3 is shown in Figure S2 and matched with that previously reported in the literature.…”

Section: Methodsmentioning

confidence: 75%

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Zhao

Liu

Sun

2022

Chemistry A European J

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“…These interlocked cage structures are very promising for future molecular switches or machines. In addition, Yuan and co-workers have engineered a “smart” catalytic system by locking catalytically active metal clusters within discrete cationic POCs, in which the counteranions provide the external stimuli before being passed along to trapped metal clusters. By employing external light and pH stimuli, this system shows excellent programmable activity control in various liquid-phase catalytic reactions.…”

Section: Applications Of Porous Organic Cagesmentioning

confidence: 99%

Porous Organic Cages

2023

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Porous organic cages (POCs) are a relatively new class of low-density crystalline materials that have emerged as a versatile platform for investigating molecular recognition, gas storage and separation, and proton conduction, with potential applications in the fields of porous liquids, highly permeable membranes, heterogeneous catalysis, and microreactors. In common with highly extended porous structures, such as metal−organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs), POCs possess all of the advantages of highly specific surface areas, porosities, open pore channels, and tunable structures. In addition, they have discrete molecular structures and exhibit good to excellent solubilities in common solvents, enabling their solution dispersibility and processability�properties that are not readily available in the case of the well-established, insoluble, extended porous frameworks. Here, we present a critical review summarizing in detail recent progress and breakthroughs�especially during the past five years�of all the POCs while taking a close look at their strategic design, precise synthesis, including both irreversible bond-forming chemistry and dynamic covalent chemistry, advanced characterization, and diverse applications. We highlight representative POC examples in an attempt to gain some understanding of their structure−function relationships. We also discuss future challenges and opportunities in the design, synthesis, characterization, and application of POCs. We anticipate that this review will be useful to researchers working in this field when it comes to designing and developing new POCs with desired functions.

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“…The dynamic change of anions affects the MC to bring designable responsiveness. 74 The counteranions of 20 can be easily modified, enabling the MC core to exhibit programmable gating effects. The precise control of chemical reactions in space and time is achieved by adjusting the accessibility of metal parts.…”

Section: The Charged Poc-based Photocatalystmentioning

confidence: 99%