Al-Hussaini Louay, Launay Franck, Galvez Elena
Centre National de la Recherche Scientifique, UMR 7197, Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, F-75005 Paris, France.
Centre National de la Recherche Scientifique, UMR 7190, Institut Jean le Rond d'Alembert, Sorbonne Université, F-75005 Paris, France.
Materials (Basel). 2020 Feb 11;13(4):812. doi: 10.3390/ma13040812.
This work deals with the aerobic oxidative cleavage of C-C and C-O bonds catalyzed by the Keggin-type phosphovanadomolybdic acid (H[PMoVO], noted HPV). The latter was synthesized by an adapted hydrothermal procedure classically used for lower vanadium content and was tested as a catalyst for the aerobic cleavage of 2-phenoxyacetophenone (noted K1) and 1-phenyl-2-phenoxyethanol (A1) used as two lignin models. The operative conditions (solvent, catalytic loading, etc.) were adjusted on K1 and extrapolated to A1. The cleavage of the alcohol model required more drastic conditions and therefore further optimization. Preliminary attempts on an Organosolv wheat straw lignin were performed too. From the kinetic study, high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) data, a mechanism of the cleavage of both models was proposed.
本工作涉及由Keggin型磷钒钼酸（H[PMoVO]，记为HPV）催化的C-C键和C-O键的有氧氧化裂解。后者通过适用于较低钒含量的经典水热法合成，并作为用于两种木质素模型2-苯氧基苯乙酮（记为K1）和1-苯基-2-苯氧基乙醇（A1）有氧裂解的催化剂进行测试。操作条件（溶剂、催化负载量等）在K1上进行了调整，并外推至A1。醇模型的裂解需要更苛刻的条件，因此需要进一步优化。还对有机溶剂法麦草木质素进行了初步尝试。通过动力学研究、高效液相色谱（HPLC）和气相色谱-质谱联用（GC-MS）数据，提出了两种模型的裂解机理。
