College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
Macromol Rapid Commun. 2023 May;44(10):e2200982. doi: 10.1002/marc.202200982. Epub 2023 Apr 6.
In this work, a novel three nitro-group-bearing monomer 3,6-dinitro-9-(2-trifluoromethyl-4-nitrophenyl)-carbazole (Car-3NO -CF ) via a CN coupling reaction between 3,6-dinitro-9H-carbazole (Car-2NO ) and 2-chloro-5-nitrobenzotrifluoride is synthesized, and obtained single crystal and single crystal analysis data for this compound. The crystal system of Car-3NO -CF is monoclinic and it has a P 21/c space group. This new monomer (Car-3NO -CF ) is also utilized to synthesize a novel azo-linked polymer (Azo-Car-CF ). The trifluoromethyl group has polar CF bonds, and thus it is an effective functional group for the capture of iodine. Azo-Car-CF 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 can reach as high as 335 m g . Azo-Car-CF exhibits an excellent capacity for iodine adsorption and can reach up to 1198 mg g in cyclohexane solution, and its adsorption capacity for iodine vapor can get to 2100 mg g . In addition, ethanol can be used to trigger the release of the captured iodine to be easily released from Azo-Car-CF .
在这项工作中，通过 3,6-二硝基-9H-咔唑（Car-2NO）与 2-氯-5-硝基三氟甲苯之间的 CN 偶联反应，合成了一种新型的含三个硝基基团的单体 3,6-二硝基-9-(2-三氟甲基-4-硝基苯基)-咔唑（Car-3NO-CF），并获得了该化合物的单晶和单晶分析数据。Car-3NO-CF 的晶体系统为单斜晶系，具有 P21/c 空间群。这种新型单体（Car-3NO-CF）还用于合成了一种新型偶氮键联聚合物（Azo-Car-CF）。三氟甲基具有极性 CF 键，因此是捕获碘的有效官能团。Azo-Car-CF 具有良好的热稳定性，在 414°C 时仅失重 10%，并且具有良好的化学稳定性，在常见的有机溶剂如四氢呋喃（THF）、丙酮、甲醇、乙醇和 N,N-二甲基甲酰胺（DMF）中的溶解度很低。Azo-Car-CF 的比表面积可高达 335m2/g。Azo-Car-CF 对碘的吸附能力非常强，在环己烷溶液中的吸附量可达 1198mg/g，对碘蒸气的吸附量可达 2100mg/g。此外，乙醇可用于触发捕获碘的释放，从而很容易从 Azo-Car-CF 中释放出来。
