SIFT-Drift Studies of Gas Phase Ion-Molecule Reactions

将对气相中各种物质的反应进行研究。反应速率和产物分布将作为反应物质的结构和电子性质的函数进行分析。提议的工作将包括自由基和阳离子之间的反应的研究，阳离子碎裂过程进行协调或非协调的路径，并涉及双键磷的过程。通过使用燃烧余辉技术，所研究的反应动力学将通过将反应物质注入流动的瞬态气相分子流来确定，这些分子本身是通过使用四极质量过滤器选择的。除了提供有关气相反应的关键热力学信息外，该调查还将有助于深入了解大气中自然发生的过程。这笔拨款将为科罗拉多大学博尔德分校C. H. DePuy博士和V. M. Bierbaum博士继续进行气相反应的研究提供资金。该调查旨在产生有关反应过程的关键数据，这些数据是许多重要化学过程的基础。除了生成速率和产物分布数据，化学家可以利用这些数据来预测新的化学反应的发生，这项研究还将对我们对发生在地球大气中的反应的一般理解产生重大影响：这应该为发展化学过程提供方向，以保持大气的完整性和确保高质量的环境。

An investigation of the reactions of a variety of species in the gas phase will be conducted. Reaction rates and product distributions will be analyzed as a function of structure and electronic properties of the reactive species. The proposed work will include studies of reactions between radicals and cations, cation fragmentation processes which proceed by either concerted or non-concerted paths, and processes involving doubly bonded phosphorous. By use of flaming afterglow techniques, the kinetics of the reactions under investigation will be determined by injecting reactive species into flowing streams of transient gas phase molecules which themselves have been selected via the use of a quadrupole mass filter. In addition to yielding critical thermodynamic information about gas phase reactions, the investigation will be instrumental in providing insight into naturally occuring processes in the atmosphere. %%% This grant will provide funding for the continuing studies of gas phase reactions by Dr. C. H. DePuy and Dr. V. M. Bierbaum at the University of Colorado at Boulder. The investigation is designed to yield critical data concerning reactive processes which are fundamental to a large number of important chemical processes. In additional to generating rate and product distribution data, which can be utilized by chemists to predict the occurence of new chemical reactions, this investigation will also have a significant impact upon our general understanding of reactions which take place in the earth's atmosphere: this should provide direction for the development of chemical processes for maintaining the integrity of the atmosphere and insuring a quality environment.