Synthesis of ETS-10-like vanadosilicates using 2,6-dimethylpiperidinium cation derivatives as organic templates

Autor(es)

Contro, Janine ^[1] ; Paula, Alex S. ^[1] ; Medeiros, Vinicius Litrenta ^[1] ; Rodrigues, Ariano D. ^[2] ; Pacheco, Carlos ^[3] ; Nery, Jose G. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Phys Dept, Lab Clean Energy Technol LACET, Campus Sao Jose do Rio Preto, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil

^[3] Penn State Univ, Dept Chem, State Coll, PA 16802 - USA

• Tipo de documento: Artigo Científico
• Fonte: Inorganic Chemistry Communications; v. 112, FEB 2020.
• Citações Web of Science: 0

Resumo

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 (Si-29 and V-51 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]clecane (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 (Si-29 MAS NMR), - 610, and - 570 ppm (V-51 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. (AU)

• Processo FAPESP: 05/54703-6 - Síntese de catalisadores sólidos enantioseletivos: o desafio intelectual, tecnológico e sintético de zeólitas quirais
• Beneficiário: Jose Geraldo Nery
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 11/51851-5 - Síntese e caracterização de catalisadores heterogêneos a base de complexos nanozeolitas/enzimas e sua aplicação na produção de biodiesel via Rota Etílica usando como matérias-primas óleo de palma
• Beneficiário: Jose Geraldo Nery
• Modalidade de apoio: Auxílio à Pesquisa - Regular