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以DMBA(1,3-二甲基巴比妥酸)为底物,通过其原位分解产物H2C2O4(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。
Using DMBA (1,3-dimethylbarbituric acid) as a substrate, two novel pressure-controlled two-dimensional layered coordination sites were prepared by self-assembly of the in situ decomposition product H2C2O4 (oxalic acid) Polymers {[Y (C2O4) 1.5 (H2O) 2] .H2O} n (1) and {[Y (C2O4) 1.5 (H2O) 3] .2H2O} n (2). Under hydrothermal conditions, the effects of different cations, anions and solvents on the separation of final products were investigated. The results showed that the complex (1) must be constructed under the condition of simultaneous presence of Y (Ⅲ) ions and deionized water. On the basis of this, the reaction mechanism was preliminarily explored, and many organic conversion processes such as oxidation reaction, nucleophilic addition reaction and elimination reaction were found, or the formation of ring-opened products in situ could be induced.