以DMBA(1,3-二甲基巴比妥酸)为底物,通过其原位分解产物H2 C2 O4(草酸)的自组装,分别制备了两种新颖的由压力调控的二维层状配位聚合物{[Y(C2O4)1.5(H2O)2]·H2O}n(1)和{[Y(C2O4)1.5(H2O)3]·2H2O}n(2)。在水热合成条件下,考察了不同阳离子、阴离子及溶剂对终产物分离的影响。结果显示,配合物(1)的构筑需在Y(Ⅲ)离子及去离子水同时存在的条件下完成。在此基础上,对反应机理进行了初步探究,发现氧化反应、亲核加成反应及消除反应等多种有机转化过程或可诱导原位开环产物的形成。%Two new 2D pressure-dependent complexes,the polymeric {[Y(C2O4)1.5(H2O)2]·H2O}n (1) and{[Y(C2O4)1.5(H2O)3]·2H2O}n(2),were successfully obtained in one-step reaction through the in situ formed (C2O4)2 -(H2C2O4 = oxalic acid) ligand synthesis of DMBA (DMBA=1,3-dimethyl-barbitiric acid) molecule. The effect of metal ions,anions or solvents in the hydrothermal synthesis sys-tems on the isolated products showed that the formation of (1) strictly relied on the use of Y(Ⅲ) ion and H2 O,and the multiple reactions of oxidation,nucleophilic addition and elimination probably induced the in situ formation of ring-cleavage product. Under this condition,the polymers based on DMBA and the in situ reaction type of this newly formed carbon skeleton are both discovered for the first time.
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