Self-assembly of reverse micelle nanoreactors by zwitterionic polyoxometalate-based surfactants for high selective production of β‑hydroxyl peroxides

Hu, Guicong; Chang, Wen Sheng; An, Sai; Qi, Bo; Song, Yu‐Fei

doi:10.1016/j.cclet.2021.11.006

Cited by 18 publications

(8 citation statements)

References 26 publications

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“…An organo-hybridization strategy can modify POM clusters with organic functional groups and create POM-based amphiphiles with tunable molecular structures and synergistic properties, which are widely applied to construct new types of hybrid materials. − Among various organically modified POMs, organosilyl derivatives of lacunary Keggin-type POMs are often used to interact with other organic molecules for further supramolecular assembly owing to their high amphiphilicity, as well as good stability and hydrolysis resistance. − In this work, Keggin-type SiW 11 was selected as the POM moiety since it has a high number of counterions. However, short PEG chains were selected as the polymer tails, on which chloromethyl trimethoxysilane groups were conjoined by Williamson reaction to obtain polyethylene glycol silane CH 3 (OCH 2 CH 2 ) n OCH 2 Si(OCH 3 ) 3 (PEG-Si).…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Anchoring of Polyoxometalate Amphiphiles into Nafion Nanophases for Enhanced Proton Conduction

Zhu

et al. 2022

ACS Nano

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Advanced proton exchange membranes (PEMs) are highly desirable in emerging sustainable energy technology. However, the further improvement of commercial perfluorosulfonic acid PEMs represented by Nafion is hindered by the lack of precise modification strategy due to their chemical inertness and low compatibility. Here, we report the robust assembly of polyethylene glycol grafted polyoxometalate amphiphile (GSiW 11 ) into the ionic nanophases of Nafion, which largely enhances the comprehensive performance of Nafion. GSiW 11 can coassemble with Nafion through multiple supramolecular interactions and realize a stable immobilization. The incorporation of GSiW 11 can increase the whole proton content in the system and induce the hydrated ionic nanophase to form a wide channel for proton transport; meanwhile, GSiW 11 can reinforce the Nafion ionic nanophase by noncovalent cross-linking. Based on these synergistic effects, the hybrid PEMs show multiple enhancements in proton conductivity, tensile strength, and fuel cell power density, which are all superior to the pristine Nafion. This work demonstrates the intriguing advantage of molecular nanoclusters as supramolecular enhancers to develop high-performance electrolyte materials.

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Section: Resultsmentioning

confidence: 99%

Supramolecular Anchoring of Polyoxometalate Amphiphiles into Nafion Nanophases for Enhanced Proton Conduction

Zhu

et al. 2022

ACS Nano

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“…This is well illustrated by the functionalization of [PW 11 O 39 ] 7− with surfactant ammonium cations, which leads to the formation of stable reverse vesicle-like supramolecular assemblies. 77 Changing the aggregation pattern is crucial for the selectivity of oxidative-catalytic properties of aggregates. Overall, the chemical approaches 9 developed for the covalent ligation of POMs can be effectively used to create a wide variety of structures.…”

Section: Supramolecular Approaches To Improve Biological Tolerancementioning

confidence: 99%

Bioorthogonal chemistry of polyoxometalates – challenges and prospects

Petrovskii,

Grachova,

Monakhov

2024

Chem. Sci.

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“…Song and Qi et al prepared a novel zwitterionic POMs group reverse micelle by covalently grafting two cationic long alkyl tails onto the lacunary site of [PW11O39] 7− (Figure 14) [101] . A new 𝛽-hydroxyl peroxide compound of 2-hydroxyl-2-phenylethan- to produce aldehydes/ketones [102] .…”

Section: Covalently Modified Poms Catalystsmentioning

confidence: 99%

Latest progress in covalently modified polyoxometalates-based molecular assemblies and advanced materials

Zhang

Zhao

et al. 2022

Polyoxometalates

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Covalently modified polyoxometalates (POMs), which benefit from the synergistic effect between POMs and covalently grafted moieties, have received increasing attention in various fields. Recent studies on the covalently modified POMs mainly focus on the function-directed POMs assemblies. In this review, we summarized the latest progress (2017-2022) of covalently modified POMs from functional perspective, which can be classified as assembly chemistry, photochemistry, electrochemistry, homogeneous/heterogeneous catalysis and biological application.The roles of POMs and covalently grafted moieties in these hybrids, especially the rational design for the specific application were considered and emphasized.

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Self-assembly of reverse micelle nanoreactors by zwitterionic polyoxometalate-based surfactants for high selective production of β‑hydroxyl peroxides

Cited by 18 publications

References 26 publications

Supramolecular Anchoring of Polyoxometalate Amphiphiles into Nafion Nanophases for Enhanced Proton Conduction

Supramolecular Anchoring of Polyoxometalate Amphiphiles into Nafion Nanophases for Enhanced Proton Conduction

Bioorthogonal chemistry of polyoxometalates – challenges and prospects

Latest progress in covalently modified polyoxometalates-based molecular assemblies and advanced materials

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