Vibration/Rotation/Translation Probes of Condensed Phase Dynamics

实验物理化学计划向加州大学伯克利分校的赫伯特·施特劳斯教授授予了一笔赠款，让他继续研究使用红外烧孔技术探测复杂、无序的系统。使用红外激光，施特劳斯将照射构成复杂体系一部分的探针分子(在本例中为氨离子)，迫使其旋转到新位置，从而在红外吸收中产生凹陷。这些空穴在低温下通过探针分子的隧穿被重新填充，并通过红外吸收监测松弛动力学。在相关实验中，将进行水、冰和沸石中氢(探测分子)的拉曼光谱和中子光谱，以产生可比较的信息。镶嵌在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都具有重要意义。氢是特别重要的，因为它的性质是可以计算的。因此，对氢的时间相关性质的计算很可能是精辟的，这导致了光谱的出现。

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.