| Full text | |
| Author(s): |
Contro, Janine
[1]
;
Paula, Alex S.
[1]
;
Medeiros, Vinicius Litrenta
[1]
;
Rodrigues, Ariano D.
[2]
;
Pacheco, Carlos
[3]
;
Nery, Jose G.
[1]
Total Authors: 6
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Inorganic Chemistry Communications; v. 112, FEB 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 05/54703-6 - Synthesis of enantioselective solid catalysts: the intellectual, technological and synthetic challenge of chiral zeolites |
| Grantee: | Jose Geraldo Nery |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 11/51851-5 - Syntheses and characterization of nanozeolites-enzymes complexes and their use as heterogeneous catalysts in the production of biodiesel by trans esterification of Palm Oil and algae oils (Dunaliella Salina and Haematococcus pluvialis) with ethanol |
| Grantee: | Jose Geraldo Nery |
| Support Opportunities: | Regular Research Grants |