Innovative indenone-derivative colorimetric fluorescent probe: A approach for copper ion detection in water

Copper (Cu²⁺) is a metal chemical element closely related to human life and is widely used in many fields. However, with the discharge of copper wastewater, the water quality will be seriously affected, leading to excessive intake of Cu²⁺ and a variety of diseases. Hence, there is a pressing need for an effective detection method for Cu²⁺ in aqueous environments. Leveraging the remarkable attributes of GFP chromophores and indenone derivatives, we have created a novel colorimetric fluorescent probe P-Cu²⁺, tailored for efficient copper ion detection. The addition of Cu²⁺ causes the solution to visibly change from colorless to a pronounced yellow, enabling naked-eye detection and offering promise for real sample analysis.