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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Temperature-Induced Water Release and Uptake in Organic Porous Networks
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Temperature-Induced Water Release and Uptake in Organic Porous Networks

机译：温度引起的水在有机多孔网络中的释放和吸收

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The behavior of water confined near nonpolar surfaces has important implications for a number of biological phenomena. In this type of confined environment the properties of "hydrophobicity" and "hydrophilicity" are closely related to the structure of the interfacial water, which in turn can depend on temperature in a very subtle way. Although the physical-chemical consequences of this fact have been theoretically addressed to a great extent, the underlying thermodynamic question is still widely discussed. Accordingly we performed thermogravimetric analysis and variable-temperature powder X-ray diffraction studies on representative hydrogen bonding organic pores occupied by water. The results indicate that a hydrophilic-to-hydrophobic transition of the inner surface of the pores occurs upon increasing temperature, which may be attributed to a strong influence of the dynamics and thermodynamics of local water molecules on the surface affinity of the pores. The relevance of our findings to the understanding of the phenomenon of water transport in natural pores is discussed.
机译：封闭在非极性表面附近的水的行为对许多生物学现象具有重要意义。在这种封闭的环境中，“疏水性”和“亲水性”的性质与界面水的结构密切相关，而界面水的结构又可以非常微妙地取决于温度。尽管这一事实的物理化学后果已在理论上得到了很大程度的解决，但仍在广泛讨论潜在的热力学问题。因此，我们对水占据的代表性氢键有机孔进行了热重分析和变温粉末X射线衍射研究。结果表明，孔的内表面从亲水性到疏水性的转变随温度升高而发生，这可能归因于局部水分子的动力学和热力学对孔的表面亲和力的强烈影响。讨论了我们的发现与对自然孔隙中水传输现象的理解的相关性。

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