Design of amino acid sensors have significant applications in bio-markers. Herein, we have developed an achiral Fe(III)-complex [FeIIIL(bzac)] (H2L = N,Nʹ-dimethyl-N,Nʹ-bi(2-hydroxy-3,5-dichlorobenzyl)-ethylenediamine (H2L) that shows highly selective sensing of histidine...