A fluorescent triazine-based covalent organic framework as a highly sensitive fluorescent probe for Fe3+ ions.

A triazine-based fluorescent COF (MaTa-COF) was synthesized from inexpensive reactants. The obtained MaTa-COF has a large BET-specific surface area of 621.15 m² g⁻¹ and can be used as a highly sensitive Fe³⁺ fluorescent probe with a wide linear range of 0–250 μM and a low detection limit of 6.18 × 10⁻² μM (K_sv = 2.34 × 10⁸ M⁻¹). Furthermore, the probe presented a good recyclability performance. [ABSTRACT FROM AUTHOR]