Controlled 2D Assembly of Nickel-Seamed Hexameric Pyrogallol[4]arene Nanocapsules

Xie

et al. 2018

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Section: Figurementioning

confidence: 99%

A Supramolecular Coordination‐Polymer‐Derived Electrocatalyst for the Oxygen Evolution Reaction

Xie

et al. 2018

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“…The preparation of C ‐alkylpyrogallol[4]arenes (PgC n , n =1–6; Scheme ) follows a previously reported condensation reaction between pyrogallol and an aldehyde catalyzed by concentrated hydrochloric acid . The solvothermal approach has proven to be a vital method for the preparation of various metal‐seamed pyrogallol[4]arene nanocapsules . This method can be further extended to fabricate magnesium‐based MONCs with pyrogallol[4]arenes with various functional groups ( R ).…”

Section: Resultsmentioning

confidence: 99%

“…Using pyrogallol[4]arenes with diverse functional groups may bring more complexity and properties. For example, introduction of alkyl hydroxyl groups at the nanocapsule surface may lead to further connection of MONCs to form hierarchical assemblies …”

Section: Introductionmentioning

confidence: 99%

“…Herein, we present the systematic preparation of magnesium‐based MONCs ( 1 – 6 ) using pyrogallol[4]arenes with different C ‐alkyl aliphatic chains (PgC n , n =1–6, Scheme ). The synthesis is based on an established solvothermal approach . The molecular structures of all magnesium MONCs are obtained from single‐crystal X‐ray diffraction (SCXRD) analysis.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Magnesium‐Seamed C‐Alkylpyrogallol[4]arene Nanocapsules with Varying Chain Lengths

Patil

et al. 2017

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Novel supramolecular nanocapsules based on metal-directed assembly have captured tremendous interest due to their applications in fields such as catalysis, selective gas adsorption, and biomedicine. Functionalization of metal-organic nanocapsules (MONCs) by using organic ligands with different pendant groups affords more complexity to the structure and may lead to novel properties. In this work, we report the solvothermal synthesis of a group of magnesium-based MONCs using C-alkylpyrogallol[4]arenes with varying alkyl chain lengths. The structures of these nanocapsules are characterized by single-crystal X-ray diffraction analysis. As expected, a progression in size of the nanocapsules is observed as the alkyl chain length increases. The effect of the chain length on the solubility of MONCs in water has been determined. This work shows the generality of the solvothermal approach for the synthesis of MONCs with different organic ligands and demonstrates that surface functionalization of MONCs may serve as an effective way to tailor their properties. The unique biocompatible nature and inherent large cavity of these magnesium-based MONCs make these nanocapsules promising for potential applications in biomedicine.

“…In particular, pyrogallol[4]arene‐based M 24 L 6 metal–organic nanocapsules (MONCs) have shown great potential as building blocks for self‐assembly of hierarchical nanostructures due to their large size and structural complexity. In our initial studies, using C ‐propan‐3‐ol‐pyrogallol[4]arene (PgC 3 OH, Figure ) as a dual‐function ligand has proven to be a feasible way to assemble M 24 L 6 hexamers into hierarchical supramolecular coordination polymers (SCPs) . As the constitutional part of nanocapsules, PgC 3 OH molecules also provide multiple propanol groups to coordinate with metal centers of adjacent nanocapsules.…”

Section: Figurementioning

confidence: 99%

Hierarchical Self‐Assembly of Supramolecular Coordination Polymers Using Giant Metal–Organic Nanocapsules as Building Blocks

Wang

Patil

et al. 2018

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Controlling the self-assembly of giant molecular building blocks into complex architectures with similar hierarchy to biological species remains a major challenge in supramolecular chemistry. Akin to protein structure, here we present the self-assembly of giant molecular nanocapsules into supramolecular coordination polymers with controlled hierarchy from primary to secondary and tertiary structures. First, we successfully prepared discrete nanocapsules (secondary structures) consisting of multicomponents, such as organic macrocycles and metal-based secondary building units (primary structures). Second, these nanocapsules can self-organize into various 2D and 3D supramolecular coordination polymers (tertiary structures) through coordination-driven assembly. The periphery 24 flexible alkyl chains and 24 metal ions available for potential coordination make these nanocapsules comparable to functionalized solid nanoparticles with non-specific binding sites at the surface and allow the nanocapsules to self-adjust their orientations and coordination modes to facilitate the self-assembly process. This study sheds light on the self-assembly of giant building units with complex molecular structures and opens up possibilities for the design of new hierarchical architectures with innovative properties and functions in many applications such as biomimics, biomedicine, and molecular devices.