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学位: 博士

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Design of conjugated microporous polymer nanotubes for efficient benzene molecular adsorptions

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论文类型: 期刊论文

第一作者: Fan, Wen-Jie

通讯作者: Fan, WJ (reprint author), Dalian Ocean Univ, Coll Sci, Dalian 116023, Peoples R China.; Zhang, RQ (reprint author), City Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.

合写作者: Zhao, Yan-Ling,Hu, Yu-Cai,Shi, Hua,Tan, Da-Zhi,Zhang, Rui-Qin

发表时间: 2018-02-05

发表刊物: INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

收录刊物: SCIE、EI

卷号: 118

期号: 3

ISSN号: 0020-7608

关键字: conjugated microporous polymer; density-functional calculations; nanotubes; structural modification

摘要: Single-walled conjugated microporous polymer (CMP) nanotubes containing alternative phenylene and ethynylene units were described computationally for the first time in this work. The electronic structures and adsorption properties were studied by the density-functional tight-binding method augmented with a van der Waals dispersion term. Our calculations show that the morphology of CMP influences the benzene-adsorption performance significantly. The tubes show smaller binding energies to benzene molecule than the film counterparts, consistent with the observation of low adsorption capacities of tubular materials in our experiments. Enlarging the linker or adding substituents in the node can both reduce the tube's band gap. The introduction of OH or NH2 substituents in the tube node increases the binding strength between the adsorbent and the adsorbate, which is energetically favorable to enhance the adsorption capacity. Our results are expected to provide theoretical insights into the rational design of novel CMP nanotubes with improved adsorption capacities for organics.

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