Reversible Structural Transformation of CuI-TbIII Heterometallic MOFs with Highly Efficient Detection Capability toward Penicillin

A Cu-I-Tb-III heterometallic MOF, namely 1.DMF, was obtained via a coordination assembly process of isonicotinic acid with CuI and Tb-III. 1.DMF can be switched to 1.MeOH in methanol with a luminescent emission response. Meanwhile, 1. MeOH exhibits a reversible single-crystal transformation to 1.DMF after immersion in DMF. Both MOFs have superior physicochemical stability. The 1.DMF-based biosensor has a remarkable sensing performance toward penicillin.

Automated summary

A Cu-I-Tb-III heterometallic MOF, 1.DMF, was synthesized through a coordination assembly process and showed luminescent emission response in different solvents. It exhibited reversible single-crystal transformation and superior physicochemical stability. The 1.DMF-based biosensor demonstrated remarkable sensing performance towards penicillin.