Synthesis of imidazoaryl-BODIPY derivatives for anion sensing applications

Imidazoaryl-BODIPY derivatives were synthesized and characterized for anion sensing applications. Absorption and emission methods were used to monitor the sensing of different anions. Our studies showed that these sensors interact with F- selectively and strongly as compare to other halides and hence are capable of detecting F- easily, in very small amount (43 x 10(-6)M). To understand the interaction of anions with sensors H-1 NMR titration were carried out. It was found that anion interacts with N-H which results in the change in the absorption and emission properties. Binding constant for F- was found to be high, 4642900 M-1. For environmental applications and qualitative analysis detection of F-, CN- and OH by these sensors in doped polymer films is also shown. (C) 2017 Elsevier B.V. All rights reserved.