Figure 1.

Representation of the library of synthetic molecular receptors diversified for array sensing. The core unit (gray cup), which may be preorganized by means of a metal ion chelation (colored marbles), binds analytes of the same compound class. Diversity, and therefore cross-reactivity, in the array is made possible by the use of various indicators (green and blue inverted cup) and covalently appended moieties such as peptide chains (series of shapes). The array shown is a minimum array composed of a core binding unit × 2 metal ions × 2 indicators × 2 peptidic chains.