Dual luminescent covalent organic frameworks for nitro-explosive detection

The assembly of two electron-rich fluorescent monomers produces a new dual luminescent covalent organic framework (DL-COF), which exhibits nitro explosives detecting ability with high sensitivity (<italic>K</italic>_sv∼ 10⁶M⁻¹,<italic>K</italic>_q∼ 10¹⁵M⁻¹s⁻¹) and high selectivity (at ppb level).