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From an organic ligand to a metal-organic coordination polymer, and to a metal-organic coordination polymer-cocrystal composite: a continuous promotion of the proton conductivity of crystalline materials

机译：从有机配体到金属有机配位聚合物，并与金属 - 有机配位聚合物 - 聚晶 - 聚晶复合材料：连续促进晶体材料的质子电导率

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摘要

Improving proton conductivity is of great importance for the further application of metal-organic frameworks (MOFs) or metal-organic coordination polymers (MOCPs) in proton exchange membrane fuel cells. In this paper, we proposed a new approach to increase proton conductivities in MOCPs coming from organic ligands, e.g. coordination inducement and MOCP-cocrystal composite formation strategies, which is based on the potential function of organic ligands. By employing the approach, we have successfully synthesized and characterized three crystalline compounds, PPA (1), [Cu(PPA)I] (2) and [Co(PPA)(2)(BDC)(H2O)(2)center dot(PPA)(2)(H2BDC)(2)(H2O)] (3) (PPA = 4-(3-pyridinyl)-2-amino pyrimidine, H2BDC = 1,4-benzenedicarboxylic acid). These compounds show high water stabilities and different proton conducting behaviours, especially compound 3 with a proton conductivity of 2.29 x 10(-4) S cm(-1) at 325 K and similar to 97% RH, which is higher than or comparable to those of some reported compounds. More importantly, a persistent increase in proton conductivity is observed from 1 to 3, which is about one order of magnitude. Furthermore, single crystal analyses show that coordination and hydrogen-bonding interactions play a crucial role in improving proton-conductive properties for these compounds. The study reveals that it is practical to boost the proton conductivity of crystal materials by means of their intrinsic merits and the strategy of molecular design.
机译：改善质子电导率对于在质子交换膜燃料电池中进一步应用金属 - 有机骨架（MOF）或金属 - 有机配位聚合物（MOCP）的进一步应用非常重要。在本文中，我们提出了一种新的方法来增加来自有机配体的MOCP中的质子电导率。协调诱导和MOCP-聚碳基复合形成策略，其基于有机配体的潜在功能。通过采用该方法，我们已经成功地合成并表征了三种结晶化合物，PPA（1），[Cu（PPA）I]（2）和[Co（PPA）（2）（BDC）（2）（2）中心点（PPA）（2）（2）（2）（2）（2）（H 2 O）]（3）（PPA = 4-（3-吡啶基）-2-氨基嘧啶，H2BDC = 1,4-苯并二羧酸）。这些化合物显示出高水稳定性和不同质子传导行为，特别是化合物3，质子导电率为2.29×10（-4）厘米（-1），325 k，类似于97％RH，其高于或比较一些报道的化合物。更重要的是，从1到3观察到质子电导率的持续增加，这是大约一个数量级。此外，单晶分析表明，协调和氢键相互作用在改善这些化合物的质子导电性方面发挥着关键作用。该研究表明，通过其内在优点和分子设计策略来提高水晶材料质子电导率实际。

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  • 来源
    《CrystEngComm》 |2020年第8期|共11页
  • 作者

    Liang Xiaoqiang; Cao Tingting; Wang Li; Zheng Changzheng; Zhao Yamei; Zhang Feng; Wen Chen; Feng Lei; Wan Chengan;

  • 作者单位

    Xian Polytech Univ Sch Environm &

    Chem Engn Xian 710048 Peoples R China;

    Xian Polytech Univ Sch Environm &

    Chem Engn Xian 710048 Peoples R China;

    Xian Polytech Univ Sch Environm &

    Chem Engn Xian 710048 Peoples R China;

    Xian Polytech Univ Sch Environm &

    Chem Engn Xian 710048 Peoples R China;

    Xian Polytech Univ Sch Environm &

    Chem Engn Xian 710048 Peoples R China;

    Harbin Normal Univ Key Lab Photochem Biomat &

    Energy Storage Mat Harbin 150025 Heilongjiang Peoples R China;

    Beijing Spacecrafts Beijing 100094 Peoples R China;

    Beijing Spacecrafts Beijing 100094 Peoples R China;

    Beijing Spacecrafts Beijing 100094 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学工业;晶体学;
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