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金属有机框架材料力学、电学及其应变调控特性的第一原理研究

王晓媛 赵丰鹏 王杰 闫亚宾

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金属有机框架材料力学、电学及其应变调控特性的第一原理研究

王晓媛, 赵丰鹏, 王杰, 闫亚宾

First-principle studies of mechanical, electronic properties and strain engineering of metal-organic framework

Wang Xiao-Yuan, Zhao Feng-Peng, Wang Jie, Yan Ya-Bin
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  • 本研究利用基于密度泛函理论的第一原理方法研究了典型金属有机框架材料-MOF-5的力学、电学性质及其应变调控特性. 通过对MOF-5材料施加不同类型的应变,系统地研究了MOF-5材料的力学特性,获得了MOF-5的弹性常数、杨氏模量等基本力学参数. 另一方面,通过分析能带结构等特征得到了MOF-5的本征电学特性,计算得到的MOF-5 的禁带带宽为3.49 eV,属于宽禁带半导体. 对MOF-5电学性质的应变调控特性研究发现,外界应变会显著降低MOF-5的禁带带宽,提高其导电性. 通过进一步分析其电子态密度、共价键键长等的变化,发现外界应变会引起MOF-5有机配体中共价键强度的降低,继而导致材料禁带带宽的减小. 研究从理论上定量揭示了外部应变对MOF-5电学性质的调控行为,为基于MOF-5的气氛传感器优化设计和性能评估等提供了重要的理论依据.
    Metal-organic frameworks (MOFs) have attracted a great deal of interest from both academia and industry due to their extensive potential applications. The tunable physical properties through the manipulation of composition have led to increasing attention to the exploration of the MOF applications. However, the tunability of physical property of MOF with external mechanical load, which usually steams from actual fabrication and application processes, has been rarely investigated. Here, ab initio (first-principles) density functional theory (DFT) calculations are performed to investigate the mechanical, electrical properties and strain engineering of a typical metal-organic framework, MOF-5. Preliminary calculations by using different pseudopotentials and cut-off energies are performed to verify the adopted critical parameters in subsequent simulations. Both the structural stability of MOF-5 and the effect of applied strain are investigated from an energetic point of view. With the increase of applied strain, the cohesive energy of MOF-5 decreases, inducing the reduction of structural stability. In addition, the variation of cohesive energy of MOF-5 shows an asymmetry under expansive and compressive conditions. By applying strain along different directions, the mechanical properties of MOF-5 are systematically investigated, and mechanical constants including Young's modulus, Poisson ratio and elastic constants are obtained. In addition, by analyzing the band gap of MOF-5, the intrinsic electrical property of MOF-5 is clarified. The band gap of MOF-5 is 3.49 eV, indicating that MOF-5 is a wide bandgap semiconductor, which is represented by the combination effect of both [Zn4O]6+ metal clusters and organic linkers. Analysis on the strain engineering of electrical properties of MOF-5 reveals that the applied strain induces the decrease of band gap of MOF-5, and thus leading to the increase of conductivity. This transition is induced by the decrease of conduction energy-level. Further studies on the variations of PDOS and covalent bond show that the strain engineering of electrical property of MOF-5 intrinsically originates from the variation of covalent bond in the organic linker. The applied strain apparently weakens the covalent bond, and thus inducing the relaxation and redistribution of electrons, which increases the activities of electrons, and finally leads to the overall increase of conductivity of MOF-5. This theoretical study quantitatively clarifies the tunability of electronic band gap of MOF-5 with external strain, and provides a theoretical guidance in the design optimization and property evaluation of gas sensors based on MOF-5.
      通信作者: 闫亚宾, yanyabin@gmail.com
    • 基金项目: 中国工程物理研究院总体工程研究所科技专项(批准号:2013KJZ02)、国家自然科学基金(批准号:11302205)、中国工程物理研究院院长基金(批准号:2014-1-097)和中国工程物理研究院重点学科项目计算固体力学资助的课题.
      Corresponding author: Yan Ya-Bin, yanyabin@gmail.com
    • Funds: Project supported by the Special Fund from Institute of Systems Engineering of China Academy of Engineering Physics (CAEP) (Grant No. 2013KJZ02), the National Natural Science Foundation of China (Grant No. 11302205), the Foundation of President of CAEP (Grant No. 2014-1-097), and the Key Subject Computational Solid Mechanics of CAEP.
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    Yaghi O M, O'Keeffe M, Ockwig N W, Chae H K, Eddaoudi M, Kim J 2003 Nature 423 705

    [2]

    Kitagawa S, Kitaura R, Noro S 2004 Angew. Chem. Int. Ed. 43 2334

    [3]

    Mueller U, Schubert M, Teich F, Puetter H, Schierle-Arndt K, Pastre J 2006 J. Mater. Chem. 16 626

    [4]

    Farha O K, Yazaydin A O, Eryazici I, Malliakas C D, Hauser B G, Kanatzidis M G, Nguyen S T, Snurr R Q, Hupp J T 2010 Nature Chem. 2 944

    [5]

    Zhong C L, Liu D H, Yang Q Y 2013 Constitutive relation of Metal-organic frameworks and its design (Beijing: Science Press) pp1-12 (in Chinese) [仲崇立, 刘大欢, 阳庆元 2013 金属-有机骨架材料的构效关系及设计(北京:科学出版社) 第 1-12 页]

    [6]

    Jacoby M 2008 Chem. Eng. News 86 13

    [7]

    Sumida K, Rogow D L, Mason J A, McDonald T M, Bloch E D, Herm Z R, Bae T H, Jeffrey R, Long J R 2012 Chem. Rev. 112 724

    [8]

    Cui Y, Yue Y, Qian G, Chen B 2012 Chem. Rev. 112 1126

    [9]

    Rosi N L, Eckert J, Eddaoudi M, Vodak D T, Kim J, O'Keeffe M, Yaghi O M 2015 Science 300 1127

    [10]

    Eddaoudi M, Kim J, Rosi N, Vodak D, Wachter J, O'Keeffe M, Yaghi O M 2002 Science 295 469

    [11]

    Rowsell J L C, Yaghi O M 2004 Micropor. Mesopor. Mater. 73 3

    [12]

    Li H, Eddaoudi M, O'Keeffe M, Yaghi O M 1999 Nature 402 276

    [13]

    Xiang H, Liu D H, Yang Q Y, Mi J G, Zhong C L 2011 Acta Phys. Sin. 60 093602 (in Chinese) [向辉, 刘大欢, 阳庆元, 密建国, 仲崇立 2011 物理学报 60 093602]

    [14]

    Sagara T, Klassen J, Ganz E 2004 J. Chem. Phys. 121 12543

    [15]

    Sillar K, Hofmann A, Sauer J 2009 J. Am. Chem. Soc. 131 4143

    [16]

    Schrock K, Schroder F, Heyden M, Fischerb R A, Havenitha M 2008 Phys. Chem. Chem. Phys. 10 4732

    [17]

    Britt D, Tranchemontagne D, Yaghi O M 2008 Proc. Natl. Acad. Sci. U.S.A. 105 11623

    [18]

    Silva C G, Corma A, Garca H 2010 J. Mater. Chem. 20 3141

    [19]

    Kreno L E, Leong K, Farha O K, Allendorf M, Van Duyne R P, Hupp J T 2012 Chem. Rev. 112 1105

    [20]

    Ellern I, Venkatasubramanian A, Lee J H, Hesketh P, Stavila V, Robinson A, Allendorf M 2013 Micro Nano Lett. 8 766

    [21]

    Tan J C, Cheetham A K 2011 Chem. Soc. Rev. 40 1059

    [22]

    Bahr D F, Reid J A, Mook W M, Bauer C A, Stumpf R, Skulan A J, Moody N R, Simmons B A, Shindel M M, Allendorf M D 2007 Phys. Rev. B 76 184106

    [23]

    Mattesini M, Soler J M, Yndurain F 2006 Phys. Rev. B 73 094111

    [24]

    Samanta A, Furuta T, Li J 2006 J. Chem. Phys. 125 084714

    [25]

    Zhou W, Yildirim T 2006 Phys. Rev. B 74 180301

    [26]

    Bordiga S, Lamberti C, Ricchiardi G, Regli L, Bonino F, Damin A, Lillerud K P, Bjorgen M, Zecchina A 2004 Chem. Commun. 20 2300

    [27]

    Alvaro M, Carbonell E, Ferrer B, Llabres i Xamena F X, Garcia H 2007 Chem. Eur. J. 13 5106

    [28]

    Civalleri B, Napoli F, Noel Y, Roetti C, Dovesi R 2006 Cryst. Eng. Comm. 8 364

    [29]

    Lin C K, Zhao D, Gao W Y, Yang Z, Ye J, Xu T, Ge Q, Ma S, Liu D J 2012 Inorg. Chem. 51 9039

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出版历程
  • 收稿日期:  2016-05-03
  • 修回日期:  2016-06-10
  • 刊出日期:  2016-09-05

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