Structures and Dynamics of Luminescent Materials Including Lasers.

摘要

Firm strides have been made in the development of methods of synthesis and purification for obtaining optically pure transition-metal complexes. Also general rules were established which summarize,catalog,and quantify the behavior of luminescent transition-metal ions. A significant accomplishment has been the formulation of a semiempirical quantum mechanical model that satisfactorily accounts for the observed optical behavior of these molecules and supplies important information about the role of spin-orbit coupling in complexes of the 4d and 5d elements. A final step forward has been the prediction -and demonstration -that complexes can be produced having optical parameters that are sensitive to the environment and may be modulated by external fields. In addition several advances are reported in instrumentation and methods of data reduction,specifically the construction of an apparatus to measure photoluminescence quantum yields and the successful determination of the efficiencies for over twenty transition-metal complexes of 4d and 5d elements,as well as the development of reliable methods of measuring decay times of luminescent crystals,plastics,and powders in the range 2-300K. (Author)