三足苯甲酰基硫脲类离子受体的合成及识别性能

Syntheses of Tripodal Benzoyl Thiourea Ions Receptors and Their Recognition Properties

本文设计并合成了两种新型含酰基硫脲结构单元的三足受体1和2,并对其结构进行了表征确证。研究表明该类受体化合物对F^-、Ac^-和CN-表现出良好的紫外识别能力,由于受体1分子内电荷转移作用较强,故对阴离子表现出裸眼识别性能。紫外滴定表明,该类化合物对F^-和CN^-具有更好的结合能力;核磁滴定表明,阴离子通过分子间氢键与受体化合物结合形成主客体配合物,在高浓度F^-时受体化合物发生脱质子行为。此外,该类化合物对Hg^2+具有一定的荧光选择性识别能力。

Two new tripodal receptors 1 and 2 containing benzoyl thiourea units were synthesized and characterized by conventional technical methods. Studies have shown that this type of receptor compound exhibits good UV-Vis recognition ability for F^-, Ac^- and CN^-. Since the receptor compound 1 has a strong intramolecular charge transfer effect, it exhibits naked eye recognition performance for anions. UV titration indicated that this class of compounds had better binding ability to F^- and CN^-. Nuclear magnetic titration showed that the anion formed a host-guest complex through the intermolecular hydrogen bond with the host, and the proton detonation behavior occurred at the high concentration of F-. In addition, this class of subjects had a certain ability to selectively recognize Hg^2+.