双酰腙钳形受体分子的合成及阴离子识别研究

Studies on synthesis of novel hydrazone-tweezer receptors and recognization properties for anions

在微波辐射下快速、高产率地合成了一系列含有四唑环的双酰腙受体,并对其进行了元素分析、红外以及核磁共振氢谱和碳谱表征.利用紫外-可见吸收光谱及1HNMR考察了其与F-,Cl-,Br-和I-卤素阴离子的相互作用.紫外滴定实验表明4a较4b,4c对F-有更好的识别作用.Job曲线表明,主体4a与F-间形成1∶1型氢键络合物.通过1HNMR滴定及质子溶剂效应进一步证明了该受体分子与阴离子以氢键作用相结合.

Three novel hydrazone compounds containing tetrazole ring have been designed and synthesized in high yields under the condition of microwave irradiation and confirmed by elemental analysis, IR, 1H NMR and 13C NMR spectra. UV-Vis and 1H NMR studies about sensors for anions（F- , Cl- , Br- , I- ） are presented. The results suggest receptor 4a can recognize F- through hydrogen binding even in competitive DMSO solutions. 1H NMR titrations and solvent effect confirm hydrogen bonding interaction between the receptors and anions. Job curve indicates that a 1 ： 1 stoichiometry complex is formed between the receptors and the two anions.