2D coordination polymers based on the interaction between cucurbit[5]uril and light lanthanide metal ions in the presence of copper salts, and use for the detection of nitrogenous bases

The coordination of cucurbit[5]uril (Q[5]) with lanthanide cations (Ln(3+)), in the presence of Cu2+ cations, led to the formation of 2D-network coordination polymers, which have been investigated using single crystal X-ray diffraction. Experimental results revealed that crystals were only readily affordable for the systems involving the lighter lanthanide cations (La3+, Ce3+, Pr3+, Sm3+, Eu3+ and Tb3+), with all six Ln(3+)- Q[5] complexes (1 similar to 6) exhibiting similar coordination mode at the cucurbit[5]uril (Q[5]), and forming 2D-network coordination polymers with a 2D supramolecular assembly. One complex was found to detect Adenine (A) and Uracil (U) with high selectively.