New Routes to 1-Hydro- and 1-Halosilatranes

Адамович, С. Н.; Prokopyev, V. Yu.; Rakhlln, V. I.; Мирсков, Р. Г.; Воронков, М. Г.

doi:10.1080/15533179108020221

Cited by 7 publications

(17 citation statements)

References 2 publications

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“…While we found that reactions with silatranyl chloride 1 are a possible option, it turned out that the use of the respective triflate 2 gave better yields. Synthesis of silatranyl triflate 2 was accomplished by reaction of silatranyl chloride 29 1 with trimethylsilyl triflate ( Scheme 1 ). 30 …”

Section: Resultsmentioning

confidence: 99%

Oligosilanylsilatranes

2015

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Oligosilanes with attached silatranyl units were obtained by reactions of potassium oligosilanides with a silatranyl triflate. Interaction between Si and N atoms was observed in the 29Si NMR spectra (upfield-shifted SiO3 resonances) and in the solid-state structures (Si–N distances between 2.29 and 2.16 Å). The Si–N interaction can be “switched off” either by protonation of the nitrogen lone pair or by potassium silanide formation caused by trimethylsilyl group cleavage in the presence of potassium tert-butoxide.

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Section: Resultsmentioning

confidence: 99%

Oligosilanylsilatranes

2015

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“…This affirms the presence of the integrated PVMo 11 polyanion structure. The bands at 2933, 2870, 1630, 1586, 1384, and 1040 cm –1 ascribed to the aliphatic C–H bonds, CO, C–OH, C–O–C, and C–O, respectively, upholding the GO integration. − …”

Section: Resultsmentioning

confidence: 94%

“…Moreover, the discrete peaks at diffraction angles of 18° and 26° confirm that PVMo 11 polyanions [JCPDS no. 00-045-0611] do not lose any crystallinity during the nanohybrid formation. , FTIR spectrum and diffraction pattern of pure PPy, GO, and PVMo 11 are shown in Figure S1 in the Supporting Information (SI).…”

Section: Resultsmentioning

confidence: 99%

“…First, graphene oxide (GO) was synthesized as reported in the literature . Likewise, the redox-active polyoxometalate cluster (H 4 [PVMo 11 O 40 ]· n H 2 O, PVMo 11 ) was prepared according to the procedure published elsewhere . In the beginning, 20 mg of GO flakes were dispersed in 50 mL of water in a beaker and stirred thoroughly.…”

Section: Methodsmentioning

confidence: 94%

“…41 Likewise, the redox-active polyoxometalate cluster (H 4 [PVMo 11 O 40 ]•nH 2 O, PVMo 11 ) was prepared according to the procedure published elsewhere. 42 In the beginning, 20 mg of GO flakes were dispersed in 50 mL of water in a beaker and stirred thoroughly. Following that, 0.135 mL of pyrrole and 1 g of PVMo 11 were added to the GO−water mixture.…”

Section: Methodsmentioning

confidence: 99%

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Polyoxomolybdate–Polypyrrole–Graphene Oxide Nanohybrid Electrode for High-Power Symmetric Supercapacitors

Maity

Biradar

et al. 2021

Energy Fuels

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Supercapacitors have emerged as one of the most promising candidates for high-performance, safe, clean, and economical routes to store and release of nonfossil energy. Designing hybrid materials by integrating double-layer and pseudocapacitive materials is crucial to achieving high-power and high-energy storage devices simultaneously. Herein, we synthesized a polyoxomolybdate–polypyrrole–graphene oxide nanohybrid via a one-pot reaction. The inclusion of polypyrrole enables a uniform distribution of the polyoxomolybdate clusters; it also confines the restacking of graphene oxide nanosheets. The structural and morphological analysis to unveil the nanohybrid architecture implies excellent interfacial contact, enabling fast redox reaction of polyanions, and a quick transfer of charge to the interfaces. Electrochemical characteristics tested under a two-electrode system exhibit the highest capacitance of 354 F g–1 with significantly high specific energy and power of 49.16 Wh kg–1 and 999.86 W kg–1, respectively. In addition, the cell possesses a high-rate capability and long cycle life by maintaining 96% of its capacitance over 5000 sweeping cycles. The highest specific power of ∼10 000 W kg–1 was computed with Coulombic efficiency of 92.30% at 5 A g–1 current density. Electrochemical impedance spectroscopy additionally reveals enhanced redox charge transfer due to double hybridization. Furthermore, it also demonstrates the impedance and capacitive behavior of supercapacitor cells over a definite frequency regime.

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