Post-Synthetic Modification of Cd-MOF with Dual Emission as a Ratiometric Probe for Visual Detection

In contemporary society, heavy metal ions have posed significant threats to water systems and human health, for which timely and accurate detection is of much significance. In this work, a new metal-organic framework, CUST-1022, [Cd(H₂BPDC)(phen)]CH₃OH was synthesized via the solvothermal method. Due to the existence of uncoordinated carboxyl sites in CUST-1022, Eu³⁺ was introduced into CUST-1022 through the postsynthesis modification method to construct a ratiom