Rotational Spectroscopy of Small Clusters

在化学系物理化学项目中，伊利诺伊大学香槟分校化学系的古托斯基教授将继续对弱结合、范德华和氢键分子络合物的结构和动力学进行一系列持续的研究。这项技术采用了一种气体混合物，通过在高真空中的超音速膨胀冷却到接近零开尔文，并用脉冲傅里叶变换微波光谱进行了研究。具体地说，将研究含有苯二聚体的络合物、稀有气体原子与氰化氢形成的络合物，以及由Ar与水形成的络合物。此外，还将继续开展有关碱卤化物二聚体络合物的工作。弱结合团簇是气体分子凝聚成液体或固体时形成的物质的一种中间形式。这种团簇的结构和动力学对于在分子水平上了解分子间作用力、了解蛋白质折叠、分子在催化表面的取向和流动性等现象是有意义的。PI进行的这项研究为分子间通过弱分子间作用力成键提供了关键数据和模型。

In this project in the Physical Chemistry Program of the Chemistry Division, Prof. H.S. Gutowsky of the Chemistry Department of the University of Illinois at Urbana-Champaign will engage in a series of continuing investigations on the structure and dynamics of weakly bound, van der Waals and hydrogen bonded, molecular complexes. The technique employs a gas mixture cooled to near zero kelvins by a supersonic expansion into a high vacuum and studied by pulsed Fourier transform microwave spectroscopy. Specifically, complexes containing benzene dimers, complexes formed by rare gas atoms with hydrogen cyanide, and those formed by argon with water will be investigated. In addition, ongoing work on alkali halide dimer complexes will be continued. Weakly bound clusters are an intermediate form of matter that form when gaseous molecules condense to form liquids or solids. The structure and dynamics of such clusters is of interest for obtaing an understanding of intermolecular forces on a molecular level, for understanding of protein folding, the orientation and mobility of molecules on catalytic surfaces, and other phenomena. The research conducted by the PI provides critical data and models for the bonding of molecules by weak intermolecular forces.