Synthesis and sensing behavior of a new multichannel sensor based on thiazolyl ferrocene-rhodamine for Hg2+ detection

2-Amino-4-ferrocenylthiazole

The crystal and mol­ecular structure of 2-amino-4-ferrocenyl­thia­zole has been determined. The crystal packing features inter­molecular N—H⋯N and C—H⋯π inter­actions.

The title compound, [Fe(C₅H₅)(C₈H₇N₂S)], was synthesized by the direct reaction of acetyl­ferrocene, thio­urea and resublimed iodine. The structure shows one mol­ecule in the asymmetric unit. The amino­thia­zole ring makes an angle of 14.53 (13)° with the ferrocenyl ring to which it is attached. In the crystal, pairs of complex mol­ecules inter­act via inter­molecular N—H⋯N hydrogen bonds, forming a cyclic dimer which then inter­acts with other dimers through C—H⋯π inter­actions.

Fluorescent chemosensors containing redox-active ferrocene: a review

The redox-active ferrocene containing two cyclopentadienyl rings and iron was extensively employed in the field of sensing, catalysis, medicine, biotechnology etc., due to the structural stability, solubility in common solvents and easy structural modification to make a wide variety of ferrocene derivatives. The ferrocene moiety can be linked suitably with fluoro-chromogenic units and applied for the multichannel (fluorescent, chromogenic and redox) sensing of various bioactive and toxic analytes. This review was narrated to compile some important ferrocene based fluorescent chemosensors developed for the detection of metal ions, anions and neutral analytes. The analytical novelty and sensing mechanisms of the summarized chemosensors are discussed to open new scopes for future research.