Synthesis of ETS-10-like vanadosilicates using 2,6-dimethylpiperidinium cation derivatives as organic templates
| Autor: | Vinicius Litrenta Medeiros, Carlos Pacheco, Ariano De Giovanni Rodrigues, Alex Silva Paula, Janine Contro, José Geraldo Nery |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal de São Carlos (UFSCar), Pennsylvania State University |
| Rok vydání: | 2020 |
| Předmět: |
02 engineering and technology
Decane 010402 general chemistry 01 natural sciences Inorganic Chemistry Solid-state MAS NMR symbols.namesake chemistry.chemical_compound Materials Chemistry 2 6-Dimethylpiperidinium cation Physical and Theoretical Chemistry Isostructural Spectroscopy Structure-directing agent Chemistry Chemical shift Nuclear magnetic resonance spectroscopy 021001 nanoscience & nanotechnology 0104 chemical sciences Crystallography Octahedron symbols 0210 nano-technology Raman spectroscopy Undecane Vanadosilicates |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1387-7003 |
| DOI: | 10.1016/j.inoche.2019.107724 |
| Popis: | Made available in DSpace on 2020-12-12T01:50:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-02-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Systematic vanadosilicate syntheses were performed using derivatives of 2,6-dimethylpiperidine as organic structure-directing agents (SDAs). Physicochemical analyses of the vanadosilicate materials obtained were carried out by X-ray diffraction (XRD), Raman spectroscopy, infrared (IR) spectroscopy, UV–visible (UV–Vis) spectroscopy, and solid-state NMR spectroscopy (29Si and 51V MAS NMR). The experimental results indicated that the presence of the organic templates had different effects on the final phases of the synthesized vanadosilicates. The XRD results showed that 1,1,2,6-tetramethylpiperidinium (SDA 1) favored synthesis of the known AM-6 vanadosilicates, isostructural to the ETS-10 titanosilicate, while the other organic templates 1,1-diethyl-2,6-dimethylpiperidinium (SDA 2), 6,10-dimethyl-5-azoniaspiro[4.5]decane (SDA 3), and 1,5-dimethyl-6-azoniaspiro[5.5]undecane (SDA 4) directed the formation of vanadosilicates with different phases, such as EVS-10. Strong Raman bands at 870 and 1035 cm−1 indicated vibrational modes associated with the highly symmetric vanadia octahedra. Chemical shifts at −96 ppm (29Si MAS NMR), −610, and −570 ppm (51V MAS NMR) provided further evidence of the incorporation of vanadium into the structures of the vanadosilicates prepared using these novel derivatives of 2,6-dimethylpiperidinium cations as SDAs. Laboratory for Clean Energy Technology (LACET) Physics Department São Paulo State University (UNESP), Campus de São José do Rio Preto Department of Physics Federal University of São Carlos Department of Chemistry Pennsylvania State University Laboratory for Clean Energy Technology (LACET) Physics Department São Paulo State University (UNESP), Campus de São José do Rio Preto CNPq: 07/478104-3 |
| Databáze: | OpenAIRE |
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