A Metal-COF-Based SERS Platform for PPb-Level Toluene Sensing With Tailored Metal Selectivity.
Ultrasensitive detection of nonpolar toxic VOCs like toluene remains a great challenge for environmental monitoring. This work presents a rationally designed SERS platform based on metallized covalent organic frameworks (M-COFs, M = Fe, Ni, Cu) obtained by a mild metal-modulation strategy that enables metal‑tunable COF...