氨基甲酰基葡萄糖取代的丙烯酸和苯甲酸-稀土配合物的合成和结构表征

Synthesis and characterization of carbamoyl glycose substituted acrylic acid and benzoic acid-RE coordination complexes

目的研究氨基甲酰基葡萄糖取代的丙烯酸和苯甲酸-稀土配合物的结构,为其应用奠定基础,合成及表征了一系列氨基甲酰基葡萄糖取代的丙烯酸和苯甲酸-稀土配合物。方法以氨基葡萄糖为原料,将合成的3-(1’,3’,4’,6’-四-O-苯甲酰基-2’-脱氧-D-葡萄糖-2’-基)氨甲酰基丙烯酸及2-(1’,3’,4’,6’-四-O-苯甲酰基-2’-脱氧-D-葡萄糖-2’-基)氨甲酰基苯甲酸作为有机酸,在碱性条件下分别与6个稀土离子形成配合物。结果以60%～80%的产率制备了12个氨基甲酰基葡萄糖取代的丙烯酸和苯甲酸-稀土配合物,并通过紫外、红外、元素分析、摩尔电导等数据推测出了配合物的分子式。结论稀土离子与配体的摩尔比为1∶4,两类配合物具有类似的配位方式:配合物中4个配体中的羧酸根与稀土离子形成4个离子键,4个配体中的酰胺羰基参与配位,此外还有1分子水也参与配位,使配合物达到9配位的稳定结构。

Objective To investigate the structure and the application of carbamoyl glycose substituted acrylic acid and benzoic acid-RE （rare-earth） coordination complexes, a series of coordination complexes was synthesized and characterized. Methods With D-glucosamine as the raw material, synthetic 3-（1＇, 3＇ , 4＇, 6 ＇-tetra-O-benzoy1-2 ＇-deoxy-D-glucose-2 ＇-yl） carbamyl acrylic acid and 2-（1 ＇, 3 ＇, 4 ＇, 6 ＇-tetra- O-benzoyl-2＇-deoxy-D-glucose-2＇-yl）carbamyl benzoic acid as organic acid ligands, six rare earth ions from light to heavy were selected to form the coordination complexes. Results Twelve carbamoyl glucose substituted acid-RE coordination complexes were synthesized in the yields of 60% to 80%, and the molecular formula was presumed from the UV, IR, element analysis, and molar conductance data. Conclusion The molar ratio of RE ions and ligand is 1 ： 4, which indicated these complexes have similar coordination modes： four carboxylates of the ligands form four ionic bonds with RE ions, four amide carbonyls of the ligands and a molecule of water are also participated in coordination, which make the complexes to be stable nine coordination.