论文部分内容阅读
15N-labelled phenolic polymers were synthesized by reactions of p-benzoquinone and 1, 4--diphenol with 15N-labelled glycine and were studied by using 15N CP-MAS NMR technique in combination with chemical approaches. Results showed that the proportion of polymer nitrogen as N-phenyl amino acid N was not as great as expected, only accounting for 5%-15%; and most of N in polymers occurred in the forms of amide, pyrrole-and indole-like nitrogen, aliphatic amines and isonitrile. It seems that great differences existed between synthetic humic acids and soil humic acids in the type and distribution of nitrogen forms.
15N-labeled phenolic polymers were synthesized by reactions of p-benzoquinone and 1, 4-diphenol with 15N-labeled glycine and were studied by 15N CP-MAS NMR technique in combination with chemical approaches. Results showed that the proportion of polymer nitrogen as N-phenyl amino acid N was not as great as expected, only accounting for 5% -15%; and most of N in the forms of the forms of amide, pyrrole-and indole-like nitrogen, aliphatic amines and isonitrile. It seems that great differences existed between synthetic humic acids and soil humic acids in the type and distribution of nitrogen forms.