Four new diferrocenyl hydrazone-enone compounds were obtained through a two-step reaction process involving 1,1′-diacetylferrocene, hydrazides, and ferrocenecarboxaldehyde. The structural characterization of two compounds, 6 and 7, through single-crystal X-ray diffraction showed the presence of a stable eclipsed conformation with the two ferrocenyl moieties oriented in trans geometries. The electrochemical and metal-ion sensing properties of the diferrocenyl-bifunctionalized compounds were explored to understand their potential [a]

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Functionalization of cymantrenyl hydrazone system with rhodamine based fluorescent tag led to the formation of a significant molecule containing both, a half sandwich and a rhodamine fragments, [(CO) (2)), with selective metal ion sensing, light responsive and molecular switching behavior. The molecule (1) was structurally characterized by single crystal X-ray diffraction study. We have also explored Hg 2+ recognition and photosensing properties of compound 1 within a bacterial strain and THP-1 cancer cell lines to understand their potential in applications related to bioimaging, uptake and bioremediation activities. The study showed some significant intracellular metal recognition and imaging characteristics at different metal concentration.