A new receptor 1 has been designed and synthesized. The open cavity of 1 selectively recognizes H2PO4− over a series of other anions in CH3CN containing 0.01% DMSO by exhibiting a ratiometric change in emission. In sensing, the cooperativity of the azaindoles in 1 has been proved using the model compound 2. Also the interaction behavior of the nitrogen in the azaindole has been proved by considering compound 3, which did not show any discrimination towards the anions. Binding studies have been carried out using fluorescence, UV-vis, 1H NMR and 31P NMR spectroscopic techniques.
一种新的受体1已经被设计和合成。受体1的开放腔体选择性地识别H2PO4−,在包含0.01%
DMSO的CH3CN溶液中相较于一系列其他阴离子表现出比率变化的发射。在传感过程中,1中的氮杂
吲哚的协同效应已使用模型化合物2得到了证明。此外,通过考虑化合物3的互作行为也证明了氮在氮杂
吲哚中的作用,后者对阴离子没有表现出任何选择性。使用荧光、紫外-可见、氢核磁共振(1H NMR)和
磷-31核磁共振(31P NMR)光谱技术进行了结合研究。