Targeted Syntheses of Charged Porous Aromatic Frameworks for Iodine Enrichment and Release

doi:10.6023/A15080562

Acta Chim. Sinica ›› 2016, Vol. 74 ›› Issue (1): 67-73.DOI: 10.6023/A15080562 Previous Articles Next Articles

Article

定向合成带电荷多孔芳香骨架材料用于碘单质的捕获和释放

闫卓君^a, 元野^b, 刘佳^c, 李勤^c, 阮南中^c, 张大明^a, 田宇阳^b, 朱广山^b

a 吉林大学电子科学与工程学院集成光电子学国家重点联合实验室长春 130012;
b 东北师范大学化学学院多酸科学教育部重点实验室长春 130024;
c 格里菲斯大学昆士兰微孔纳米技术中心布里斯班澳大利亚 4111

投稿日期:2015-08-25 发布日期:2015-11-24
通讯作者: 张大明, 田宇阳 E-mail:zhangdm@jlu.edu.cn;tianyy100@nenu.edu.cn
基金资助:
项目受国家重点基础研究发展计划(973计划, No. 2012CB821700)、重大国际(地区)合作研究(No. 21120102034)、国家自然科学基金(No. 20831002)资助

Targeted Syntheses of Charged Porous Aromatic Frameworks for Iodine Enrichment and Release

Yan Zhuojun^a, Yuan Ye^b, Liu Jia^c, Li Qin^c, Nguyen Nam-Trung^c, Zhang Daming^a, Tian Yuyang^b, Zhu Guangshan^b

a State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012;
b Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024;
c Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, Australia, 4111

Received:2015-08-25 Published:2015-11-24
Supported by:
Project supported by National Basic Research Program of China (973 Program, No. 2012CB821700), Major International (Regional) Joint Research Project of NSFC (No. 21120102034) and NSFC (No. 20831002).

1. Targeted Syntheses of Charged Porous Aromatic Frameworks for Iodine Enrichment and Release.PDF(382KB)

Abstract

In this paper, we synthesized two charged porous aromatic frameworks (PAF-21 and PAF-22) using lithium tetrakis(4-iodophenyl)borate as tetrahedral units and 1,4-benzenediboronic acid or 4,4'-biphenyldiboronic acid as linear linkers via a Suzuki coupling reaction. FTIR spectra prove the completion of the coupling reaction. The absence of the B-OH band (at 3370 cm^-1) and the C-I bands (at 480 and 506 cm^-1) in the FTIR spectra indicate the formation of polymeric networks. The solid-state ¹³C CP/MAS NMR spectra of PAF-21 and PAF-22 showed the carbon resonances with chemical shift in the range of δ 120～145, which are related to aromatic carbon atoms of framework-building phenylene groups. Simultaneously, the only resonance at δ -26 shown in ¹¹B MAS NMR spectra can be attributed to the central B atom in the framework. Both ¹³C CP/MAS NMR and ¹¹B MAS NMR analyses show the absence of other resonances, testifying that an almost complete coupling reaction has taken place. Powder X-ray diffraction (PXRD) of these PAFs revealed their amorphous texture, no long-range ordered frameworks could be detected due to the distortion and interpenetration of the phenyl rings. Scanning electron microscopy (SEM) images showed that PAF-21 and PAF-22 were composed of large fused polymer masses. Transmission electron microscopy (TEM) images also revealed that they were amorphous materials. Thermogravimetric analysis (TGA) showed that PAF-21 and PAF-22 were thermally stable up to 350 °C under atmosphere. In addition, these materials also exhibit high chemical stability, as verified by no dissolution or decomposition in common organic solvents such as methanol, ethanol, acetone, THF, CH₂Cl₂, CHCl₃, DMF, etc. Carbon dioxide sorption isotherms were measured on the activated samples at 273 K and 1 bar. The CO₂ uptake is 19.2 mg/g for PAF-21 and 22.5 mg/g for PAF-22, respectively. Compared with other materials such as zeolites and metal-organic frameworks, these PAFs show very high affinity and capacity for iodine (1520 mg/g for PAF-21 and 1960 mg/g for PAF-22 respectively) due to their special charged aromatic networks. Significantly, PAF-21 and PAF-22 could reversibly release iodine molecules in ethanol solution, might be used in practical and commercial applications for contaminative iodine treatment.

Key words: Suzuki coupling reaction, charged porous aromatic frameworks, thermal stability and chemical stability, iodine enrichment, reversibly release

Cite this article

Yan Zhuojun, Yuan Ye, Liu Jia, Li Qin, Nguyen Nam-Trung, Zhang Daming, Tian Yuyang, Zhu Guangshan. Targeted Syntheses of Charged Porous Aromatic Frameworks for Iodine Enrichment and Release[J]. Acta Chim. Sinica, 2016, 74(1): 67-73.

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定向合成带电荷多孔芳香骨架材料用于碘单质的捕获和释放

Targeted Syntheses of Charged Porous Aromatic Frameworks for Iodine Enrichment and Release

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