An Intriguing Morphology Evolution of Polyoxometalate‐Polystyrene Hybrid Amphiphiles from Vesicles to Tubular Aggregates

Han, Yaokun; Zhang, Zijian; Wang, Yong‐Liang; Xia, Nan; Liu, Bo; Yu, Xiao; Jin, Liuxin; Zheng, P.; Wang, Wei

doi:10.1002/macp.201000410

Cited by 47 publications

(27 citation statements)

References 58 publications

(120 reference statements)

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“…We selected inorganic polyoxometalates (POMs) and organic polymers as building blocks to construct POM-polymer hybrid materials. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] In the specific design of a POM-polymer hybrid molecule, a Wells-Dawson-type POM cluster was used as the inorganic building block because it could be covalently modified, [29] and the organic block was commercially available poly(ethylene glycol) (PEG). [7,8] Organic polymers were selected for their ease of processability and attractive mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Bottom‐Up Hybridization: A Strategy for the Preparation of a Thermostable Polyoxometalate–Polymer Hybrid with Hierarchical Hybrid Structures

Tang

et al. 2014

ChemPlusChem

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A bottom‐up strategy for the preparation of hierarchical hybrid materials with good thermostability is reported. The hybrid molecule was constructed from a Wells–Dawson‐type polyoxometalate (POM) cluster and a poly(ethylene glycol) (PEG) chain through covalent‐bond formation. The large distinction between the POM cluster and PEG chain results in a microphase separation to form POM and PEG layers that further alternatively arrange into hybrid lamellae with a sub‐20 nm thickness. Then the hybrid lamellae could simultaneously organize into spherulitic superstructures. Because of this hierarchical structuring, strong electrostatic interactions between POM clusters are maximized within the POM layers. This gives rise to thermostability. Structurally, the hybrid lamellae and the superstructures are unchanged, even at 160 °C, and indeed the shear storage modulus of the hybrid material remains nearly constant within this same temperature range. This study demonstrates the concept of bottom‐up hybridization, in which rationally selecting building blocks, designing the hybrid molecule, and then manipulating hierarchical structures can generate thermostable hybrid materials.

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Section: Introductionmentioning

confidence: 99%

Bottom‐Up Hybridization: A Strategy for the Preparation of a Thermostable Polyoxometalate–Polymer Hybrid with Hierarchical Hybrid Structures

Tang

et al. 2014

ChemPlusChem

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“…13 The proton salts of the obtained POM-PS composite formed aggregates in DMF, which showed a transition from vesicles to tubular structures upon thermal annealing, these latter being thermodynamically more stable. 14 To the best of our knowledge very few stimuli-responsive covalent POM-polymer hybrids have been studied so far.…”

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confidence: 99%

Study of the temperature-induced aggregation of polyoxometalate-poly(N,N-diethylacrylamide) hybrids in water

Haye

Costa

Pembouong

et al. 2015

Polymer

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ABSTRACT. In this article, we study the temperature-induced phase transition of aqueous solutions of tailor-made Dawson polyoxometalate-poly(N,N-diethylacrylamide) hybrids (POMPDEAAm) by means of differential scanning calorimetry, dynamic light scattering and cryo-TEM microscopy. Generally, the typical thermoresponsive aggregation of the PDEAAm in water was transferred to the hybrids. The organization of the compounds in solution below and above the transition temperature was studied, and precious insights in the aggregation mechanisms were obtained. The impact of the polymer chain-ends, the nature of the counterions of the negatively charged POM subunits and the weight fraction of the POM was elucidated, revealing a strong influence of the POM's counter-ions. Temperature and nature of the cations are thus two external factors that can be used to control the properties of the conjugates.

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“…Giant surfactants may also form metastable micelle structures due to the interactions generated by multiple hydrogen bonds between polar heads and the tail that may form glassy state at a low temperature even in solution. Wang et al studied the evolution of self‐assembled morphologies of POM‐PS during the annealing process . Figure shows a set of TEM bright‐field images of self‐assembly aggregates after different thermal annealing time.…”

Section: Design and Synthesis Of Giant Surfactantsmentioning

confidence: 99%

Giant surfactants based on molecular nanoparticles: Precise synthesis and solution self‐assembly

Dong

et al. 2014

J Polym Sci B Polym Phys

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Giant surfactants are polymer-tethered molecular nanoparticles (MNPs) and can be considered as a subclass of giant molecules. The MNPs serve as functionalized heads with persistent shape and volume, which may vary in size, symmetry, and surface chemistry. The covalent conjugation of MNPs and polymer tails affords giant surfactants with diverse composition and architecture. Synthetic strategies such as "graftingfrom" and "grafting-onto" have been successfully applied to the precise synthesis of giant surfactants, which is further facilitated by the emergence of "click" chemistry reactions. In many aspects, giant surfactants capture the essential features of small-molecule surfactants, yet they have much larger sizes. They bridge the gap between small-molecule surfactants and traditional amphiphilic macromolecules. Their self-assembly behaviors in solution are summarized in this Review. Micelle formation is affected not only by their primary chemical structures, but also by the experimental conditions. This new class of materials is expected to deliver general implications on the design of novel functional materials based on MNP building blocks in the bottom-up fabrication of well-defined nanostructures.

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An Intriguing Morphology Evolution of Polyoxometalate‐Polystyrene Hybrid Amphiphiles from Vesicles to Tubular Aggregates

Cited by 47 publications

References 58 publications

Bottom‐Up Hybridization: A Strategy for the Preparation of a Thermostable Polyoxometalate–Polymer Hybrid with Hierarchical Hybrid Structures

Bottom‐Up Hybridization: A Strategy for the Preparation of a Thermostable Polyoxometalate–Polymer Hybrid with Hierarchical Hybrid Structures

Study of the temperature-induced aggregation of polyoxometalate-poly(N,N-diethylacrylamide) hybrids in water

Giant surfactants based on molecular nanoparticles: Precise synthesis and solution self‐assembly

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