Entrapment of Polypyrrole Chains between MOS2 Layers via an in Situ Oxidative Polymerization Encapsulation Reaction

Chemistry of Materials

Volumn 7, Issue 10, 1995, Pages 1753-1755

  Wang, Lei ^a   Schindler, Jon ^b   Thomas, Joyce Albritton ^b   Kannewurf, Carl R ^b   Kanatzidis, Mercouri G ^a  

^a MICHIGAN STATE UNIVERSITY   (United States)

^b NORTHWESTERN UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001497321     PISSN: 08974756     EISSN: 15205002     Source Type: Journal    
DOI: 10.1021/cm00058a001     Document Type: Article

References (33)

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28. An amount of 0.20 g of LiMoS2 (1.20 mmol) was exfoliated in 20 mL of H2O. To this solution 0.016 g of pyrrole (0.24 mmol) dissolved in 5 mL of H2O was added. The mixture was stirred in an ice bath for 15 min and to it an aqueous solution of 0.156 g (0.96 mmol) FeCl3 was added dropwise. The reaction mixture was stirred in an ice bath for ~24 h. The product was collected by filtration as black solid, washed with acetone, and dried in vacuum. Yield was quantitative. Anal. Calcd (%) for (C4H3N)o.24MoS2: C. 6.56%; H 0.41; N. 1,91. Found C. 6.59; H. 0,59; N. 1.31. Thermal gravimetric analysis (TGA) experiments are consistent with the proposed stoichiometry.
29. The (PANI)MoS2 was prepared by a different method in which a polymer solution was mixed with an aqueous solution of single MoS2 layers.
30. Assuming a monolayer of densely packed polypyrrole chains.
31. Incomplete oxidation of M0S2x-has been claimed in Li/PEO/ M0S2 systems but a full characterization of these materials has not been presented. In our hands the M0S2x-appears to oxidize fully to the neutral state, Lemmon, J. P.; Lerner, M. M. Chem. Mater. 1994, 6, 207-210.
32. The amount of hydroxide would be very small, about 0.024 mol/ M0S2 (assuming that ppy is doped at the 33% level per polymer formula unit). Under TGA conditions, the material loses ~2% of its weight between 50 and 160 ±C which is due mostly to water possibly associated with, or originating from, OH-ions in the galleries. The polymer decomposes under oxygen flow at ~400 ±C. We note that co-intercalation of hydroxide ions in M0S2 has been claimed earlier: Gee, M. A.; Frindt, R. F.; Joensen, P.; Morrison, S. R. Mater. Res. Bull. 1986, 21, 543-549.
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