The Structural Study of Milled Wood and Dioxane Lignin of Cupressus Sempervirens Using DFRC Method

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Abstract

In this study, derivatization followed by reductive cleavage (DFRC) method was used to investigate the structures of milled wood lignin and dioxane lignin of Spruce (Cupressus sempervirens). After performing DFRC reactions, the structures of constituents resulted from these two kinds of lignins were investigated by using Spectroscopic methods such as 13CNMR, GC-mass and gel permeation chromatography (GPC). The results obtained from chromatography and spectroscopy studies were compared. These comparative results show that the dominant structural components of these two kinds of lignin are obtained from the cleavage of ?-O-4 bonds. The main components obtained from dioxane lignin and milled wood lignin are 4-hydroxy-3-methoxy-1-phenyl propene and 4-hydroxy-3-methoxy-1-phenyl- propenal (guaiacyl structures), respectively.

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References

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