Rapid and sensitive detection of nitroaromatic explosives has attracted considerable attention due to their serious harm to our world. In this work, two porous luminescent covalent-organic polymers and COP-301) have been synthesized through copolymerization of double ligands. The results indicate that the two COPs with high thermal stability show significant luminescence quenching effects for nitroaromatic explosives. In particular, the two COPs exhibit not only a high sensitivity (about 1 ppm) for nitoraromatic explosives, but also an extremely high selectivity for 2,4,6-trinitrophenol (PA), which suggests that they are promising luminescent probes for highly sensitive and selective detection of nitroaromatic explosives, especially for PA.Rapid and selective detection of nitroaromatic explosives has become one of the most pressing issues, because nitroaromatic explosives are serious pollution sources of water and important chemical species in mine elds, munitionary remediation sites, military and security applications. 1-5 Currently, nitroaromatic derivatives are being used world-wide to prepare different explosives. Among them, the detection of 2,4,6-trinitrophenol (PA) has become very popular as it is widely used in dyes, re-works, glass and leather industries. During commercial production and use, PA is released into the environment, leading to the contamination of soil and aquatic biosystems. 6-10 Thus, there is an urgent need to develop an efficient and reliable sensor for detection of nitroaromatic explosives, especially for PA, owing to their serious pollution and potential threats to security.Until now, a variety of methods of sensing nitroaromatic explosives have been reported. 11 Metal detectors, widely used as a portable instrument for eld explosive detection, cannot locate the plastic casing of modern land mines. Trained dogs are expensive and difficult to maintain and are also easily fatigued. 12 Physical detection methods for explosives include gas chromatography coupled with a mass spectrometer, surface-enhanced Raman spectroscopy, nuclear quadrupole resonance, energy-dispersive X-ray diffraction, neutron activation analysis, electron capture detection and cyclic voltammetry. 13-19 These techniques are highly selective, but some are expensive and are not easily elded in a small low-power package. Most detection methods for explosives are only applicable to vapor samples, 20-22 because of the interference problems encountered in complex aqueous media.As a complementary method, however, chemical sensors provide new means for the rapid detection of ultra-trace analytes from explosives, and can be easily incorporated into inexpensive and portable microelectronic devices. 23-30 Meanwhile, uorescence-based sensor schemes are very special promising. Moreover, the uorescence method has individual advantages in many circumstances. Therefore, the uores-cence-based detection is gaining increasing attention owing to its high sensitivity, simplicity, short response time and its ability to be employed b...