FOR 1583: Hydrogen-Bonded Liquids Subject to Interfaces of Various Hydroaffinities

FOR 1583：受各种亲水性界面影响的氢键液体

• 批准号: 179546604
• 金额: --
• 依托单位: Institut für Physik Kondensierter Materie (IPKM)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/179546604?language=en
• 关键词: 1583; Hydrogen; Bonded; Liquids; Subject

Hydrogen-bonded liquids exhibit a number of extraordinary properties, rendering them very interesting for basic- and application-oriented research. Well known examples are the anomalies of water, in particular, the density anomaly, which is essential for life. Interfaces strongly affect the properties of liquids. For example, the fluidity of water in nanoscopic confinements depends on the hydroaffinity and size of the environment. The ability to control the behaviour of hydrogen-bonded liquids in restricted spaces plays an enormous role for the regulation of biological processes and for the miniaturisation in nanotechnology. The Research Unit combines modern techniques of preparation, characterisation and modelling to analyse the interplay of structure, dynamics and phase behaviour of hydrogen-bonded liquids in confinements of different size, hydroaffinity and softness and for various external conditions, e.g., in a broad temperature range. In general, the properties of a liquid in a confinement and in the bulk can differ because of the effects of interfaces and of finite size. The former result from specific interactions at the boundary surface, while the latter occur when the size of the confinement is comparable to structural and dynamical length scales of the system. To ascertain the relevance of these effects and to gain a fundamental understanding, we prepare mesoporous host materials with functionalised surfaces in the Research Unit. Moreover, a large number of experimental and theoretical methods are combined to analyse the behaviours of the guest materials. Specifically, we use methods of scattering, spectroscopy, calorimetry and microscopy as well as approaches of simulation and modelling. In this way, we investigate structure and dynamics on a large variety of length- and time scales so as to, on the one hand, obtain fundamental insights into structure-dynamics relations on a microscopic level and, on the other hand, trace back macroscopic properties to molecular mechanisms.

氢键液体表现出许多非凡的性质，使它们对基础研究和面向应用的研究非常有趣。众所周知的例子是水的异常，特别是密度异常，这对生命至关重要。界面强烈地影响液体的性质。例如，水在纳米范围内的流动性取决于环境的亲水性和大小。控制氢键液体在有限空间中的行为的能力对生物过程的调节和纳米技术的小型化起着巨大的作用。该研究单位结合了现代制备、表征和建模技术，分析了不同尺寸、亲水性和柔软度以及各种外部条件（例如，在广泛的温度范围内）下氢键液体的结构、动力学和相行为的相互作用。一般来说，由于界面和有限尺寸的影响，约束和体中的液体性质会有所不同。前者是由边界表面的特定相互作用产生的，而后者是在约束的大小与系统的结构和动态长度尺度相当时发生的。为了确定这些效应的相关性并获得基本的理解，我们在研究单元中制备了具有功能化表面的介孔宿主材料。此外，还结合了大量的实验和理论方法来分析客体材料的行为。具体来说，我们使用散射，光谱学，量热法和显微镜以及模拟和建模的方法。通过这种方式，我们在各种长度和时间尺度上研究结构和动力学，一方面，在微观层面上获得结构-动力学关系的基本见解，另一方面，将宏观性质追溯到分子机制。