Synthesis, characterization and evaluation of MFI zeolites as matrixes for rhynchophorol prolonged release
| Autor: | Ingrid Graça Ramos, Arão Cardoso Viana, Janice Izabel Druzian, Henrique Fonseca Goulart, Edeilza Lopes dos Santos, Antônio Euzébio Goulart Santana, Artur J.S. Mascarenhas, Heloysa Martins Carvalho Andrade |
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| Rok vydání: | 2017 |
| Předmět: |
Rhynchophorus palmarum
biology Chemistry Mineralogy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification 01 natural sciences 0104 chemical sciences Characterization (materials science) Rhynchophorol Mechanics of Materials Prolonged release Intramolecular force Degradation (geology) General Materials Science ZSM-5 Fourier transform infrared spectroscopy 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microporous and Mesoporous Materials. 242:99-108 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2016.12.034 |
| Popis: | Rhynchophorol has been used as lure for monitoring and controlling the beetle Rhynchophorus palmarum L. in palm tree culture. However, for the efficient use of techniques based on pheromone it is required a constant and adequate release of this compound for long period, while adult insects are present. In order to evaluate the potential use of MFI zeolites (ZSM-5 and silicalite-1) as matrixes to slow down the release of rhynchophorol, the silicalite-1 and ZSM-5 zeolites in SiO2/Al2O3 molar ratio (SAR) of 24, 41 and 52 were synthesized and characterized by XRD, ED XRF, 27Al MAS NMR, FTIR, TG, SEM, textural analysis and NH3-TPD. Recovery studies showed that the rhynchophorol was completely degraded in ZSM-5, independently of the SAR. The degradation mechanism was proposed to occur via an intramolecular E1 elimination. Recovery above 90% was obtained only from silicalite-1 (SAR = ∞). This result indicated that not only acidity, but diffusional effects determine the stability of rhynchophorol in MFI zeolites. |
| Databáze: | OpenAIRE |
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