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Updated: Jan 11, 2026

Efficient Synthesis of Polyfunctionalized Benzenes in Water via Persulfate-promoted Benzannulation of α,β-Unsaturated Compounds and Alkynes
Published on: December 16, 2019
Green and Selective Oxidation of Benzyl Alcohol to Benzaldehyde over Transition Metal LDH Nanosheets: Combining
Seyedsaeed Mehrabi-Kalajahi1,2, Seyed Amir Hossein Vasigh3, Xin-Zhao Wu4
1Department of Petroleum Engineering, Kazan Federal University, Kazan 420008, Russia.
Abstract:
The solvent-free and aerobic oxidation of benzyl alcohol is an exceptionally efficient approach for synthesizing benzaldehyde; however, the conversion rates and selectivity are still insufficient as effective catalysts need to successfully activate both the O-H bond and the O2 molecules. In this study, various layered double hydroxides (LDHs) were successfully prepared and employed for the oxidation of benzyl alcohol in a solvent-free environment. The specific LDHs employed in this study comprise Cu-Co-Fe-LDH (I), Zn-Co-Fe-LDH (II), Zn-Ni-Co-Fe-LDH (III), and Cu-Ni-Co-Fe-LDH (IV). The presence of LDH structures in all analyzed samples was verified through X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), along with additional techniques such as Raman spectroscopy, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). The Cu-Ni-Co-Fe-LDH catalyst exhibited excellent activity in solvent-free benzyl alcohol oxidation, achieving conversions of 7.47% and 12.34% after 5 h, with benzaldehyde selectivity above 99% and 92% under atmospheric and 10 atm O2, respectively. Density functional theory (DFT) calculations demonstrated that alloying the surface of Cu-Ni-Co-Fe-LDH may stabilize important intermediate adsorbates in the conversion of ph-CH2OH to ph-CHO. These catalysts show great potential for the selective conversion of benzyl alcohol into valuable products for chemical and petrochemical applications.
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