2-Dimensional Analytic Approach for Anion Differentiation with Chromofluorogenic Receptors

By linking the urea moiety at the 1,8 positions of the carbazole fragment, we synthesized host systems <b>1</b>, <b>2</b>, and <b>3</b> having both chromogenic and fluorogenic signaling subunits. The spectral changes in both the signaling subunits could be easily analyzed via a simple 2-dimensional (2D) analytic approach described here, which enables us to differentiate the given set of anions. Structural studies are also reported.