Synthesis of Luminescent Covalent-Organic Polymers for Detecting Nitroaromatic Explosives and Small Organic Molecules

• Published in: Macromolecular rapid communications. Vol. 33; no. 14; pp. 1184 - 1190
• Main Authors: Xiang, Zhonghua, Cao, Dapeng
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 26.07.2012; WILEY‐VCH Verlag; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Benzene; covalent-organic frameworks; covalent-organic polymers; Exact sciences and technology; Explosive Agents - analysis; Explosives; Luminescence; luminescence probe; metal-organic frameworks; nitroaromatic explosives detection; Organic polymers; Physicochemistry of polymers; Picrates - analysis; Polymers; Polymers - chemical synthesis; Polymers - chemistry; Polymers with particular properties; porous conjugated polymers; Preparation, kinetics, thermodynamics, mechanism and catalysts; Trinitrotoluene - analysis; Self condensation; Photoluminescence; Aromatic polymer; nitroaromatic explosives detection; Specific surface area; Porous material; covalent-organic polymers; luminescence probe; Crosslinked copolymer; Conjugated polymer; Triazine copolymer; Optical properties; Luminescence quenching; Crosslinked polymer; Aromatic copolymer; Picric acid; Phenylene copolymer; porous conjugated polymers; Debromination; Fluorescence detector; Catalytic reaction; Solution polycondensation; Trinitrotoluene; Phenylene polymer; Experimental study; metal-organic frameworks; Conjugated copolymer; Dinitrotoluene; Preparation; Nickel complex; Explosives; Porosity; covalent-organic frameworks
• ISSN: 1022-1336; 1521-3927; 1521-3927
• DOI: 10.1002/marc.201100865

Three porous luminescent covalent‐‐organic polymers (COPs) have been synthesized through self‐polycondensation of the monomers of tris(4‐bromophenyl)amine, 1,3,5‐tris(4‐bromophenyl)benzene, and 2,4,6‐tris‐(4‐bromo‐phenyl)‐[1,3,5]triazine by using Ni‐catalyzed Yamamoto reaction. All the COP materials possess not only high Brunauer–Emmett–Teller (BET) specific surface area of about 2000 m2 g−1, high hydrothermal stability, but also graphene‐like layer texture. Interestingly, COP‐3 and COP‐4 show very fast responses and high sensitivity to the nitroaromatic explosives, and also high selectivity for tracing picric acid (PA) and 2,4,6‐trinitrotoluene (TNT) at low concentration (<1 ppm). In short, the COPs may be a new kind of material for detecting explosives and small organic molecules. Three porous graphene‐like covalent–organic polymers (COPs) have been synthesized by Ni‐catalyzed Yamamoto reaction in this work. These COP materials show fast responses and high sensitivity to the nitroaromatic explosives. The COP materials may be a new candidate for detecting explosives.