A Novel Azo-Linked Polymer Bearing Trifluoromethyl Groups for I 2 Capture.

In this work, we have synthesized a novel three nitro-group-bearing monomer 3,6-dinitro-9-(2-trifluoromethyl-4-nitrophenyl)-carbazole (Car-3NO 2 -CF 3 ) via a CࣿN coupling reaction between 3,6-dinitro-9H-carbazole (Car-2NO 2 ) and 2-chloro-5-nitrobenzotrifluoride, and obtained single crystal and single crystal analysis data for this compound. The crystal system of Car-3NO 2 -CF 3 was monoclinic and it had a P 21/c space group. We have also utilized this new monomer (Car-3NO 2 -CF 3 ) to synthesize a novel azo-linked polymer (Azo-Car-CF 3 ). The trifluoromethyl group has polar CࣿF bonds, and thus it is an effective functional group for the capture of iodine. Azo-Car-CF 3 has great thermal stability with a mass loss of only 10% at 414 °C, as well as good chemical stability as is demonstrated by its low solubility in common organic solvents such as tetrahydrofuran (THF), acetone, methanol, ethanol, and N,N-dimethylformamide (DMF). The specific surface area of Azo-Car-CF 3 can reach as high as 335 m 2 g -1 . Azo-Car-CF 3 exhibits an excellent capacity for iodine adsorption was great and could reach up to 1198 mg/g in cyclohexane solution, and its adsorption capacity for iodine vapor could get to 2100 mg/g. In addition, ethanol could be used to trigger the release of the captured iodine could be easily released from Azo-Car-CF 3 . This article is protected by copyright. All rights reserved.