A hexanuclear gadolinium-organic octahedron as a sensitive MRI contrast agent for selectively imaging glucosamine in aqueous media

A hexanuclear gadolinium octahedral nanocage was self-assembled as an efficient multimeric magnetic resonance probe for selectively responding glucosamine. The rigid facial bridging ligands provided additional enhancements for the proton relativity around gadolinium ions, ensuring the application of MRI in vivo.