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活性卤素是大气中的重要物种,它能参与大气中的多种化学过程,对臭氧的损耗有重要影响,影响许多重要物种的源和汇,同时对大气硫循环和汞循环也产生影响,在大气化学中有着十分重要的作用。因此,对活性卤素化学的研究成为近年来国际大气化学研究的重要前沿。本文总结了近年来活性卤素化学实验和理论的研究进展,重点介绍了活性卤素在臭氧损耗中的作用及其大气循环反应过程;综述了重要活性卤素物种的产生和探测、活性卤素光化学反应和非均相反应实验研究;总结了近年来关于活性卤素化学的理论研究,包括活性卤素与水、硫、HO、HO2、烷基氧和烷基过氧自由基、氮氧化物、汞及其它物种的耦合研究。最后,对活性卤素化学的实验和理论研究进行了展望,提出了尚待深入开展研究的一些重要科学问题。
Reactive halogens are important atmospheric species that participate in many chemical processes in the atmosphere and have a significant impact on ozone depletion, affecting the sources and sinks of many important species, as well as atmospheric sulfur and mercury cycles. Atmospheric chemistry has a very important role. Therefore, the research on active halogen chemistry has become an important frontier of international atmospheric chemistry research in recent years. This review summarizes recent advances in the experimental and theoretical studies of active halogen chemistry. The role of active halogens in ozone depletion and their atmospheric circulation processes are summarized. The generation and detection of important active halogen species, photochemical reactions of active halogens The experimental research on homogeneous reaction has been summarized. Theoretical studies on active halogen chemistry in recent years have been summarized, including the reaction of active halogen with water, sulfur, HO, HO2, alkyloxy and alkylperoxyl radicals, nitrogen oxides, mercury and other species Coupling research. Finally, the experimental and theoretical studies on active halogen chemistry are prospected, and some important scientific issues to be further studied are put forward.