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Liang L, Sun N, Yu Y, Ren S, Wu A, Zheng L. Photoluminescent polymer hydrogels with stimuli-responsiveness constructed from Eu-containing polyoxometalate and imidazolium zwitterions. SOFT MATTER 2020; 16:2311-2320. [PMID: 32051977 DOI: 10.1039/d0sm00082e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inorganic-organic co-assembly of anionic polyoxometalates (POMs) with zwitterions provides a facile way to fabricate functional soft materials. In this paper, a translucent, photoluminescent polymer hydrogel was fabricated from Weakley-type POM Na9EuW10O36 (EuW10) and polymerizable imidazole-type zwitterion 3-(1-vinyl-3-imidazolio)propanesulfonate (VIPS) via a one-step synthesis method. Detailed characterization indicated that the polymerization of double bonds in VIPS and electrostatic interactions between EuW10 and VIPS play important roles in the formation of the hydrogels. Additionally, the introduction of non-polymerizable zwitterions 3-(1-methyl-3-imidazolio)propanesulfonate (MIPS) or 3-(1-decyl-3-imidazolio)propanesulfonate (C10IPS) can improve the mechanical and luminous performances of the hydrogels. Especially, C10IPS with a long alkyl chain would more significantly alter the coordination environment of EuW10, and consequently resulted in a more efficient energy transfer process. Further investigations revealed that the chemical environment around the Eu3+ can be highly influenced by organic solvents with stronger coordination abilities than water molecules, such as acetone. The translucency and luminescence intensity of the hydrogels can be reversibly transformed after alternately immersing in acetone or H2O for several minutes. Our results provided a useful strategy for the fabrication of luminescent hydrogels by regulating the noncovalent interactions between POMs and zwitterions.
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Affiliation(s)
- Liwen Liang
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
| | - Na Sun
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
| | - Yang Yu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
| | - Shujing Ren
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
| | - Aoli Wu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
| | - Liqiang Zheng
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, P. R. China.
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Martinetto Y, Pégot B, Roch‐Marchal C, Cottyn‐Boitte B, Floquet S. Designing Functional Polyoxometalate‐Based Ionic Liquid Crystals and Ionic Liquids. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900990] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yohan Martinetto
- Institut Lavoisier de Versailles, UMR 8180 Université de Versailles St‐Quentin en Yvelines, Université Paris‐Saclay 45 Avenue des Etats‐Unis 78035 Versailles France
- Institut Jean‐Pierre Bourgin, INRA, Agro Paris Tech, CNRS Université Paris Saclay 78000 Versailles France
| | - Bruce Pégot
- Institut Lavoisier de Versailles, UMR 8180 Université de Versailles St‐Quentin en Yvelines, Université Paris‐Saclay 45 Avenue des Etats‐Unis 78035 Versailles France
| | - Catherine Roch‐Marchal
- Institut Lavoisier de Versailles, UMR 8180 Université de Versailles St‐Quentin en Yvelines, Université Paris‐Saclay 45 Avenue des Etats‐Unis 78035 Versailles France
| | - Betty Cottyn‐Boitte
- Institut Jean‐Pierre Bourgin, INRA, Agro Paris Tech, CNRS Université Paris Saclay 78000 Versailles France
| | - Sébastien Floquet
- Institut Lavoisier de Versailles, UMR 8180 Université de Versailles St‐Quentin en Yvelines, Université Paris‐Saclay 45 Avenue des Etats‐Unis 78035 Versailles France
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Ionic self-assembly of organic-polyxometalate hybrids in solid state and its charge transfer properties. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.05.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Malinenko A, Jonchère A, Girard L, Parrès-Maynadié S, Diat O, Bauduin P. Are Keggin's POMs Charged Nanocolloids or Multicharged Anions? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2026-2038. [PMID: 29278508 DOI: 10.1021/acs.langmuir.7b03640] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Owing to their multiple charges and their nanometric size, polyoxometalates (POMs) are at the frontier between ions and charged colloids. We investigated here the effect of POM-POM electrostatics repulsions on their self-diffusion in water by varying POM and supporting salt concentrations. The self-diffusion coefficients of two Keggin's POMs [silicotungstate (SiW12O404-) and phosphotungstate (PW12O403-)] were determined by dynamic light scattering (DLS) and 1H/31P DOSY NMR, whereas POM-POM electrostatic repulsions were investigated by the determination of the static structure factors using small-angle X-ray scattering (SAXS). The self-diffusion coefficients for the two POMs and for different POM/background salt concentrations were collected in a master curve by comparing the averaged POM-POM distance in solution to the Debye length. As for classical charged colloids, we show that the POM's counterions should not be considered in the calculation of the ionic strength that governs POM-POM electrostatic repulsions. This result was confirmed by fitting the POM-POM structure factor by considering a pair potential of spherical charged particles using the well-known Hayter mean spherical approximation (MSA). These Keggin POMs also behave as (super)chaotropic anions (i.e., they have a strong propensity to adsorb on (neutral polar) surfaces, which was also investigated) here on the surface of octyl-β-glucoside (C8G1) micelles. The variations of (i) the chemical shift of 1H/31P NMR signals and (ii) the self-diffusion coefficients obtained by DOSY 1H/31P NMR of PW3- and of C8G1 were in good agreement, confirming the strong adsorption of POMs on the micelle polar surface from static and dynamic points of view. We concluded that Keggin's POMs behave (i) as anions because they adsorb on surfaces as chaotropic anions and (ii) as colloids because they can be described by a classical colloidal approach by dynamic and static scattering techniques (i.e., by the investigation of their interparticle electrostatic structure factor and self-diffusion without considering the POM's counterions in the ionic strength calculation). This work highlights the dynamic properties of POMs at soft interfaces compared to bulk aqueous solution, which is essential in the understanding of functional properties of POMs, such as (photo)catalysis and the rational design of POM-based hybrid nanomaterials from soft templating routes (i.e., in aqueous solutions at room temperature).
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Affiliation(s)
- Alla Malinenko
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Alban Jonchère
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Luc Girard
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | | | - Olivier Diat
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
| | - Pierre Bauduin
- ICSM, CEA, CNRS, ENSCM, Univ Montpellier , Marcoule, France
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Tan C. Self-assembly, aggregates morphology and ionic liquid crystal of polyoxometalate-based hybrid molecule: From vesicles to layered structure. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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