A supramolecular Cu(II) metallocyclophane probe for guanosine 5 '-monophosphate

We demonstrate Cu2+ ion induced formation of a novel water soluble metallocyclophane [1 center dot CuCl2](2), which uniquely recognizes guanosine 5'-monophosphate through changes in emission intensity utilizing synergistic effects of electrostatic, coordinative and pi-stacking interactions inside the cavity.