| Autor: |
Singh, Amravati S., Advani, Jacky H., Biradar, Ankush V. |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 6/7/2020, Vol. 49 Issue 21, p7210-7217, 8p |
| Abstrakt: |
Herein, we report a simple route for the synthesis of phosphonate functionalized Brønsted solid acid carbon spheres as heterogeneous catalyst for the valorization of bio-derived α-pinene oxide. The Brønsted acidity was generated via two steps; hydrothermal carbonization of sugar to produce carbon microspheres followed by PCl3 treatment to form phosphonate functionalized carbon. The presence of phosphonate was confirmed by CP-MAS 31P and 13C NMR. In addition, the presence of the P–C, O–P–C and HO–P＝O bonds of the phosphonate group was confirmed by FT-IR, 31P NMR, and XPS. SEM-EDAX analysis revealed the presence of a phosphorus content of ∼1.71 wt% on the surface of the catalyst while elemental mapping showed a uniform dispersion of phosphorus over the carbon spheres. The as-synthesized Brønsted solid acid catalyst was used for the isomerization of α-pinene oxide which gave 100% conversion with 67% trans-carveol selectivity in highly polar basic solvent in 1 h reaction time. Also, the catalyst showed good recyclable activity even after five cycles. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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