New Hybrid Covalent Networks Based on Polyoxometalates: Part 1. Hybrid Networks Based on Poly(ethyl methacrylate) Chains Covalently Cross-linked by Heteropolyanions: Synthesis and Swelling Properties
Source abstract
Abstract
Polyoxotungstates with propyl methacrylate functionalities and ethyl methacrylate were copolymerized in acetonitrile leading to the formation of networks whose swelling properties have been studied in several organic solvents. The polyanions ensure the cross-linking of poly(ethyl methacrylate) chains and are therefore an integral part of the covalent structure of the gels. This synthetic route to achieve the preparation of polyanion-containing polymeric materials differs from those studied up to now.
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Research context
OpenAlex topics: Polyoxometalates: Synthesis and Applications · Chemical Synthesis and Reactions · Vanadium and Halogenation Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
ESA 7071, Laboratoire de Chimie Inorganique et Matériaux Moléculaires, Université Pierre et Marie Curie, Case courrier 42, 4 Place Jussieu, 75252 Paris Cedex 05, France
UMR 7610, Laboratoire de Synthèse Macromoléculaire, Université Pierre et Marie Curie, Case courrier 184, 4 Place Jussieu, 75252 Paris Cedex 05, France
References (14)
Show source-provided references
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13. POM3was prepared as follows: K8[γ-SiW10O36]·12H2O was synthesized according to a previously described procedure (Canny, J.; Tézé, A.; Thouvenot, R.; Hervé, G.Inorg. Chem.1986,25, 2114). To the starting polyanion (2.97 g, 1 mmol) in CH3CN/H2O suspension (30 and 8 mL respectively), were successively added NBu4Br (0.64 g, 2 mmol), H2CC(Me)C(O)OPrSi(OMe)3(0.47 mL, 2 mmol) and Cl-(Me)3N+C2H4OC(O)C(CH3)CH2(0.2 mL, 1 mmol). Then 0.5 mL of 12 M HCl was added, and the reaction mixture was vigourously stirred for 6 h. A white compound was formed. It was recovered from the reaction mixture by solvent evaporation then washed with water.1H NMR data in CD3CN (300 MHz); 6.12 (s, 1H, HaCa), 6.06 (s, 2H, HaCb), 4.6 (m, 2H, C(O)CH2a), 4.1 (q, 4H, C(O)CH2b), 3.8 (t, 2H, CH2Na), 3.1 (m, 16H, CH2Nc), 2.44 (s, 9H, N(CH3)3a), 1.93 (s, 6H, C(CH3)Ob), 1.90 (s, 3H, C(CH3)Oa), 1.78 (q, 4H, CH2b), 1.60 (m, 16H, CH2c), 1.40 (m, 16H, CH2c), 0.98 (t, 24H, CH3c) and 0.64 ppm (t, 4H, CH2Sib); a−c superscripts are referenced to (Me)3N+C2H4OC(O)C(CH3)CH2, [SiW10O36(2HCC(Me)C(O)OPrSi)2O], and [N(C4H9)4]+, respectively. The quantitative analysis confirmed the presence of two covalently linked propyl methacrylate substituents along with one (Me)3N+C2H4OC(O)C(CH3)CH2functionality.
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