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Design, synthesis, characterization, and ion detection studies of two ferroceneappended Schiff bases namely N-(2-[ferrocenylamino]ethyl)-5-nitropyridin-2-amine(1) and ferrocenylamino-1H-imidazole-4-carboxamide (2) been reported. Both the chemosensors have been thoroughly characterized using Fourier transfer infrared, 1 H and 13 C nuclear magnetic resonance, high resolution mass spectrometry, and ultraviolet/visible (UV/visible) and fluorescence spectral techniques. Probes 1 and 2 were designed with the aim of appending the ferrocenyl group with pyridine ring having an amine substitution (for 1) and imidazole ring with an amide substitution (for 2). Interaction of these probes with a series of cations and anions was examined through UV/vis and fluorescence spectral techniques. Probe 2 exhibited an insignificant

A novel pyrene-based uorescent chemosensor 1 (pyren-1ylmethyl)-L-phenylalanine was designed and synthesized by combining 1-pyrenecarboxyaldehyde and L-phenylalanine. 1 was characterized by several analytical methods and used as a uorescent chemosensor for the selective and sensitive detection of Cu 2+ ions through "turn-off" mechanism with a detection limit of 2 x 10 − 8 M. 1 can also be used to detect Cu 2+ ions in a natural water sample and exhibits gelation properties with high thermal stability.

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