β-Cyclodextrin-Encapsulated Rhodamine Derivatives Core-Shell Microspheres-Based Fluorescent Sensor for Au 3+ and Template for Generating Microplates of Gold.

We have developed β-cyclodextrin-encapsulated rhodamine derivative core-shell microspheres (β-CD@RH) to improve their aqueous solubility and biocompatibility. The β-CD@RH core-shell microspheres exhibited bright and stable fluorescence with Au 3+ ion in aqueous media. The development of triangular and hexagonal gold microplates within an aqueous solution by a simple, one-step, and green chemistry strategy is followed and prepared. Fluorescent imaging of Au 3+ in living cells is also successfully demonstrated.