Vibration/Rotation/Translation Probes of Condensed Phase Dynamics

实验物理化学计划授予加州大学伯克利分校的赫伯特·施特劳斯教授一笔赠款，以继续他的研究，利用红外（IR）孔燃烧技术探测复杂的无序系统。使用红外激光器，施特劳斯将照射一个探针分子（在这种情况下是铵离子），它构成了复杂系统的一部分，迫使它旋转到一个新的位置，从而在红外吸收中产生一个下降。探针分子在低温下穿隧填充这些空穴，并通过红外吸收监测弛豫动力学。在相关实验中，将对水、冰和沸石中的氢（探针分子）进行拉曼光谱和中子光谱分析，以获得可比较的信息。嵌入冰或沸石中的氢在天文学、储能和催化等许多科学技术领域具有重要意义。氢是特别重要的，因为它的性质是可以计算的。因此，计算氢的随时间变化的性质，导致光谱，可能是深刻的。

The Experimental Physical Chemistry Program has awarded a grant to Professor Herbert Strauss of the University of California at Berkeley to continue his studies probing complex, disordered systems using infrared (IR) hole-burning techniques. Using an IR laser, Strauss will irradiate a probe molecule (ammonium ion, in this case), which makes up part of the complex system, forcing it to rotate into a new position, and thereby creating a dip in the IR absorption. These holes are refilled by tunneling of the probe molecule at low temperature, and the relaxation dynamics is monitored by IR absorption. In related experiment, Raman and neutron spectra of hydrogen (probe molecules) in water, ice and zeolites will be undertaken to yield comparable information. Hydrogen embedded in ice or zeolite is of importance in many fields of science and technology such as astronomy, energy storage, and catalysis. Hydrogen is of special importance because its properties are amenable to calculation. Consequently, calculations of the hydrogen time-dependent properties, which lead to the spectra, are likely to be incisive.