Abstract
To the best of our knowledge, only a few number of single molecule based receptors synthesized from Diaminomalenonitrile (DAMN) have been explored and developed as highly selective and sensitive recognition motifs for cations and anions in a organic, aqueous or mixed solvent system. The interaction between such receptors and ions has been reported with remarkable alteration in absorption and fluorescence properties of the molecule. The signal transduction is prompt, and attributed to the modulation of Internal Charge Transfer (ICT) and/or Photo Induced Electron Transfer (PET) processes within the molecule. In this review, we have compiled whole literature about recognition of ions via DAMN based molecular receptors possessing biological applications including live cell imaging. Emphasis has been diverted to summarize and briefly discuss signal response, operation of solvent, selectivity, binding affinity and detection limit. In addition to this, some of the crucial design considerations, such as choice of fluorophore, tuning of electronic effects and mechanism of operation are momentarily discussed.
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