Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies

Figure 2

UV-visible absorption spectra of (a) PMo₁₁Fe; (b)FePMo₁₂; (c) HPMo₁₂; (d) HPMo₁₁V.