Three-dimensional protonic conductivity in porous organic cage solids.
Three-dimensional protonic conductivity in porous organic cage solids.
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DOI：
10.1038/ncomms12750
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发表时间：
2016-09-13
影响因子：
16.6
通讯作者：
Cooper, Andrew I.
中科院分区：
文献类型：
--
作者：
Liu, Ming;Chen, Linjiang;Lewis, Scott;Chong, Samantha Y.;Little, Marc A.;Hasell, Tom;Aldous, Iain M.;Brown, Craig M.;Smith, Martin W.;Morrison, Carole A.;Hardwick, Laurence J.;Cooper, Andrew I.
质子传导是生物学和质子交换膜燃料电池等设备中的一个基本过程。为了最大化质子传导，三维传导路径比一维路径更受欢迎，因为一维路径阻止了二维传导。到目前为止，许多晶体多孔固体都表现出一维质子传导。在这里，我们报道了具有质子电导的多孔分子笼(在高相对湿度下高达10−3 S cm−1)，它与扩展的金属-有机骨架竞争。有机笼子的结构强加了一条必然是三维的传导路径。笼形分子还通过限制水分子来促进质子转移，同时具有足够的灵活性，允许氢键重组。通过质子电导率测量、结晶学、分子模拟和准弹性中子散射在分子水平上解释了质子传导。这些结果为高温无水质子导体提供了一个起点，通过在笼孔中包含除水以外的其他客体。质子传导是燃料电池发展的基本过程，但晶体多孔固体中的三维质子传导却很少见。在这里，作者报告了有机分子笼子，其中的结构施加了与金属-有机骨架竞争的三维质子传导性。
Proton conduction is a fundamental process in biology and in devices such as proton exchange membrane fuel cells. To maximize proton conduction, three-dimensional conduction pathways are preferred over one-dimensional pathways, which prevent conduction in two dimensions. Many crystalline porous solids to date show one-dimensional proton conduction. Here we report porous molecular cages with proton conductivities (up to 10−3 S cm−1 at high relative humidity) that compete with extended metal-organic frameworks. The structure of the organic cage imposes a conduction pathway that is necessarily three-dimensional. The cage molecules also promote proton transfer by confining the water molecules while being sufficiently flexible to allow hydrogen bond reorganization. The proton conduction is explained at the molecular level through a combination of proton conductivity measurements, crystallography, molecular simulations and quasi-elastic neutron scattering. These results provide a starting point for high-temperature, anhydrous proton conductors through inclusion of guests other than water in the cage pores. Proton conduction is a fundamental process for fuel cell development, but three-dimensional proton conduction in crystalline porous solids is rare. Here, the authors report organic molecular cages in which the structure imposes three-dimensional proton conductivity competing with metal-organic frameworks.
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影响因子：
16.6
作者：
Bushell, Alexandra F.;Budd, Peter M.;Attfield, Martin P.;Jones, James T. A.;Hasell, Tom;Cooper, Andrew I.;Bernardo, Paola;Bazzarelli, Fabio;Clarizia, Gabriele;Jansen, Johannes C.
通讯作者：
Jansen, Johannes C.
影响因子：
16.6
作者：
Jimenez-Garcia, Lucia;Kaltbeitzel, Anke;Muellen, Klaus
通讯作者：
Muellen, Klaus
影响因子：
1.7
作者：
Krack, M
通讯作者：
Krack, M
影响因子：
15
作者：
Chandra, Suman;Kundu, Tanay;Banerjee, Rahul
通讯作者：
Banerjee, Rahul
影响因子：
15
作者：
Hasell, Tom;Schmidtmann, Marc;Cooper, Andrew I.
通讯作者：
Cooper, Andrew I.