New ferrocene-pyrene dyads bearing amide/thiourea hybrid donors for anion recognition
作者:Hongwei Huang、Zhaohui Xin、Lin Yuan、Bin-Yong Wang、Qian-Yong Cao
DOI:10.1016/j.ica.2018.08.055
日期:2018.11
AcO − and H 2 PO 4 − , with the ferrocene-based redox potential showing a large negative shift. Interestingly, both 1 and 2 exhibited an exclusive fluorescence sensing of F − over other anions, with the fluorescence of the receptors showing a turn-off response. Further, the binding mechanism between receptors and anions was confirmed by 1 H NMR titrations, which reveal that the two thiourea NH donors
摘要设计并制备了两个带有酰胺和硫脲供体的新的二茂铁-re二联体(1和2),用于阴离子识别。1的结构还通过X射线单晶分析来表征。通过电子化学和荧光技术充分研究了1和2的阴离子识别能力。在CH 3 CN溶液中,1和2均表现出对F-,AcO-和H 2 PO 4-的良好电化学感应,二茂铁基氧化还原电势显示出较大的负移。有趣的是,1和2均显示出F-优于其他阴离子的荧光,而受体的荧光则显示出关断响应。此外,通过1 H NMR滴定确定了受体与阴离子之间的结合机理,这表明两个硫脲NH供体与酰胺供体协同作用,