A new approach to the mechanism for the acetalization of benzaldehyde over MOF catalysts

• Published in: New journal of chemistry 2020-09, Vol.44 (35), p.14865-14871
• Main Authors: Camu, Esteban, Pazo, Cesar, Becerra, Daniel, Hidalgo-Rosa, Yoan, Paez-Hernandez, Dayan, Zarate, Ximena, Schott, Eduardo, Escalona, Nestor
• Format: Article
• Language: English
• Subjects: Atmospheric models; Benzaldehyde; Room temperature; Thermogravimetry; X ray powder diffraction
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d0nj02416c

The benzaldehyde acetalization reaction catalyzed by UiO-66, and its fluorinated analog UiO-66F, was carried out in a batch-type reactor at room temperature and atmospheric pressure, and the full kinetic study was performed using the Langmuir-Hinshelwood and Eley-Rideal models. It was established that the Eley-Rideal model is the one that best fits the experimental data. The catalytic results indicated that both MOFs enable carrying out the acetalization reaction. However, UiO-66F has the highest activity, which could be attributed to its high acidity. Both structures were characterized by N 2 physisorption, thermogravimetry, powder X-ray diffraction, potentiometric titrations, and infrared spectroscopy. The highest acidity displayed by UiO-66F was explained by DFT studies and experimental studies. The benzaldehyde acetalization catalyzed by UiO-66 and UiO-66F, was carried out in a batch-type reactor at room temperature and atmospheric pressure, and the full kinetic study was performed using the Langmuir-Hinshelwood and Eley-Rideal models.