摘要
Owing to its two unsymmetrical-NH<sub>2</sub> groups sited on different terminals, 2, 6-diaminocaproic acid （lysine） was used as a reactant for synthesizing a novel unsymmetrical Schiff base with salicylaldehyde on one side and ovanillin on the other for the first time. It is a new way to synthesize such a special unsymmetrical Schiff base. It is named 'hetero bis-Schiff base' for distinguishing it from others. The synthesis method, formation mechanism as well as twelve new lanthanide complexes with the above ligand are reported and discussed herein. They were characterized by elementary analysis, molar conductivity, IR-spectra and especially by <sup>1</sup>H and <sup>13</sup>C NMR spectra. The results obtained may provide a new promising method for synthesizing similar unsymmetrical Schiff bases and their complexes.
Owing to its two unsymmetrical-NH2 groups sited on different terminals, 2, 6-diaminocaproic acid (lysine) was used as a reactant for synthesizing a novel unsymmetrical Schiff base with salicylaldehyde on one side and ovanillin on the other for the first time. It is a new way to synthesize such a special unsymmetrical Schiff base. It is named “hetero bis-Schiff base” for distinguishing it from others. The synthesis method, formation mechanism as well as twelve new lanthaniHe complexes with the above ligand are reported and discussed herein. They were characterized by elementary analysis, molar conductivity, IR-spectra and especially by1H and13C NMR spectra. The results obtained may provide a new promising method for synthesizing similar unsymmetrical Schiff bases and their complexes.
基金
Project supported by the National Natural Science Foundation of China (Grant No. 29671026)
the Natural Science Foundation of Zhejiang Province (Grant No. 296062)
the Laboratory of MRAMP (Grant No. 971502)
