Toward the Controlled Synthesis of Highly Dispersed Metal Clusters Enabled by Downsizing Crystalline Porous Organic Cage Supports

Zhu, Lan; Zhang, Suyun; Yang, Xinchun; Zhuang, Qiang; Sun, Jian‐Ke

doi:10.1002/smtd.202200591

Cited by 5 publications

(3 citation statements)

References 45 publications

(16 reference statements)

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“…1(a)). 14 It is worth noting that the coordination interaction between metal ions and imine groups, as evidenced by the obvious shift of the absorption bands and the binding energy of N 1s in the XPS spectra, plays a crucial role in the growth of MCs. As the size of the crystalline support decreases, the bound ratio between the imine group and metal ions increases, leading to an enhanced metal-support interaction that controls nucleation and results in small MCs (Fig.…”

Section: Encapsulation and Stabilization Of Metal Precursormentioning

confidence: 99%

The marriage of porous cages and metal clusters for advanced catalysis

Yang

Chen

et al. 2023

Mater. Chem. Front.

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Section: Encapsulation and Stabilization Of Metal Precursormentioning

confidence: 99%

The marriage of porous cages and metal clusters for advanced catalysis

Yang

Chen

et al. 2023

Mater. Chem. Front.

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“…Among the reported porous matrixes, organic molecular cages, as newly developed microporous materials, have attracted increasing attention over the past few years . Such materials are composed of discrete molecules with intrinsic, guest-accessible cavities, which can be used to confine the MNPs and prevent aggregation. − Recently, the use of size-adjustable cavities of different kinds of organic cages to modulate MNP size and related catalytic activity has experienced rapid development. − Although great progress has been made, it remains a great challenge to compromise encapsulation and mass transfer in catalytic processes. In particular, the nanosized discrete pore once encapsulating the MNPs may block accessibility to some extent, which is detrimental to mass transfer, especially in the case of catalysis involving substrates of different sizes/geometries.…”

Section: Introductionmentioning

confidence: 99%

Immobilizing Metal Nanoparticles on Hierarchically Porous Organic Cages with Size Control for Enhanced Catalysis

Zhang

Zhou

Tan

et al. 2023

ACS Appl. Mater. Interfaces

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Incorporating metal nanoparticles (MNPs) into porous composites with controlled size and spatial distributions is beneficial for a broad range of applications, but it remains a synthetic challenge. Here, we present a method to immobilize a series of highly dispersed MNPs (Pd, Ir, Pt, Rh, and Ru) with controlled size (<2 nm) on hierarchically micro-and mesoporous organic cage supports. Specifically, the metal−ionic surfactant complexes serve as both metal precursors and mesopore-forming agents during self-assembly with a microporous imine cage CC3, resulting in a uniform distribution of metal precursors across the resultant supports. The functional heads on the ionic surfactants as binding sites, together with the nanoconfinement of pores, guide the nucleation and growth of MNPs and prevent their agglomeration after chemical reduction. Moreover, the as-synthesized Pd NPs exhibit remarkable activity and selectivity in the tandem reaction due to the advantages of ultrasmall particle size and improved mass diffusion facilitated by the hierarchical pores.

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“…[29][30][31] Introducing AIE units to the metal-organic cage could make it exhibit good optical properties in both dissolved and aggregate states by inhibiting its molecular rotation. 32 Designing new metalorganic cages with AIE units as photosensitizers in PDT therapy has a great application potential; [33][34][35][36][37] however, the research on this topic is still rare.…”

Section: Introductionmentioning

confidence: 99%