The tautomerization between keto- to phenol-hydrazone induced by anions in the solution
作者:Xuefang Shang、Jianmei Yuan、Yingling Wang、Jinlian Zhang、Xiufang Xu
DOI:10.1016/j.molstruc.2011.11.020
日期:2012.2
calculation. The addition of F − , AcO − and H 2 PO 4 - to the host solution resulted in a red shift of the charge-transfer absorbance band accompanied by a color change from yellow to orange in the naked-eye experiments. Receptor 1 containing a nitro group at the para position and receptor 2 containing two bromine groups at the ortho and para positions both showed strong binding ability for H 2 PO 4 - ion in
摘要 两个简单的阴离子受体,2-[(2-hydroxy-5-nitrophenyl)methylene]hydrazone (1) 和 2-[(3,5-dibromo-2-hydroxyphenyl)methylene]hydrazone (2) 与 -OH 结合位点, 被合成和表征。受体 1 和 2 与卤化物阴离子(F - 、Cl - 、Br - 和 I - )、AcO - 和 H 2 PO 4 - 的阴离子结合能力使用视觉(裸眼)、UV-vis 滴定实验研究干 DMSO 连同 DFT 理论计算。F - 、AcO - 和H 2 PO 4 - 添加到主体溶液中导致电荷转移吸收带红移,并伴随肉眼实验中的颜色从黄色变为橙色。在对位含有硝基的受体1和在邻位和对位含有两个溴基的受体2均表现出对苯酚腙形式的H 2 PO 4 - 离子的强结合能力。此外,由溶液中的阴离子物质诱导的受体1从酮腙转化为苯酚腙的形式。