1,9-Dicarbonyl-2,8-dioxo-butyne-ester Ferrocenophane: Synthesis, Structure and Recognition Properties for Co²⁺ and Cu²⁺ Ions

An efficient highly diluted synthetic approach to the synthesis of 1,9-dicarbonyl-2,8-dioxo-butyne ester ferrocenophane (L) has been developed. The title compound was characterized by IR, UV, FL, 1H NMR, spectroscopies, elemental analysis and so on. Further complex L shows fluorescence responses to Co²⁺ and Cu²⁺ in CH3OH, The results indicate that the complex could be applied in multianayte detection. The binding ability of receptor L CH3OH was tested for various cations (Co²⁺, Cu²⁺, Zn²⁺, and Ni²⁺ in water) and the binding constants for Co²⁺ and Cu²⁺ were the computed, having a distinct absorbance shift. The receptor is a very attractive array because its distinct absorbance shift profile in a semi-aqueous phase, making it applicable in the area of biology, environmental sciences and material chemistry.