Salen-卟啉配合物催化氧化二苯型木素模型物的研究

Catalytic Oxidation of Diphenyl-Type Lignin Model Compounds by Salen-Porphyrin Complex

研究Salen-卟啉配合物催化氧化二苯醚、二苯乙烷、二苯甲烷木素模型物的降解产物.利用红外光谱和气相色谱-质谱(GC-MS)分析二苯型木素模型物在Salen-卟啉配合物催化氧化下的降解产物.通过对比转化数(TON)与转化率(TOF),发现催化剂的存在使反应底物发生转化;Zn PSC6的催化能力强于Co(salen)的催化能力.依据催化氧化后的二苯型木素模型物降解产物,发现Salen-卟啉配合物的催化氧化能使二苯型木素模型物中醚键、Cβ-Cγ、Cα-Cβ联接断裂,并且使苯基减少,产生了苯酚、苯甲酸等降解产物.

The degradation products of lignin model compounds such as diphenyl ether,diphenyl oxide,diphenyl methane lignin model compounds in the presence of the salen-porphyrin complex catalyst are studied in this paper. The products are analyzed by FT-IR and GC-MS. Through comparison of the turnover number（ TON）and the turnover frequency（ TOF）,it is found that the presence of a catalyst results in the conversion of the reaction substrate. The catalytic ability of Zn PSC6 is stronger than that of Co（ salen）. The degradation of lignin model compounds is elucidated based on the degradation products. The Salen-porphyrin complex catalytic oxidation makes the ether bond,Cβ-Cγ,Cα-Cβlinkage broken and phenyl reduced. It produces degradation products of phenol,benzoic acid and others.