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题名: Molecular Barrel by a Hooping Strategy: Synthesis, Structure, and Selective CO2 Adsorption Facilitated by Lone Pair-pi Interactions
作者: Wang, Qi-Qiang1, 4; Luo, Na1, 4; Wang, Xu-Dong1, 4; Ao, Yu-Fei1; Chen, Yi-Fan2; Liu, Jun-Min2; Su, Cheng-Yong2; Wang, De-Xian1, 4; Wang, Mei-Xiang3
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2017-01-18
卷: 139, 期:2, 页:635-638
收录类别: SCI
英文摘要: A sophisticated molecular barrel 5 was efficiently constructed by hooping a 63-membered loop around a D-3h-symmetric, shape-persistent bis(tetraoxacalix[2]arene[2]triazine) core. The hooping strategy involved 3-fold ring-closing metathesis (RCM) reactions of six branched olefin arms which were preanchored on the inner core. Through hooping, the loop tightens the cage structure and significantly enhances its stability, toward nucleophilic decomposition. The X-ray crystal structure showed the molecular barrel bears three enclosed fan shaped cavities as divided by the triazine rings and each of the cavities can hold a solvent CHCl3 or CH2Cl2 molecule. With the intrinsic porosity, the amorphous solids of 5 exhibit considerable CO2 uptake with an exceptionally large isosteric enthalpy. Lone pair (lp)-pi interactions between the electron-deficient triazine rings and CO2 could contribute to the strong adsorption as supported by IR studies and DFT modeling.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36544
Appears in Collections:分子识别与功能实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Mol Recognit & Funct, Beijing 100190, Peoples R China
2.Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
3.Tsinghua Univ, Minist Educ, Key Lab Bioorgan Phosphorous & Chem Biol, Beijing 100184, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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