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自Vogel发现染料可以扩展卤化银的感光范围以来,有关染料在卤化银照像中的应用和光谱增感理论均取得了长足进展.Gilman和Kuhn等提出了光谱增感中的电子转移和能量传递理论.随着现代谱学手段的出现,为人们了解光谱增感的初级过程提供了条件.如Tani在光照吸附了菁染料的卤化银粉末(或乳剂)时,观测到ESR单峰,认为这是起源染料与卤化银价带正空穴作用产生的染料正空穴自由基.Honda等根据光照吸附eosine的ZnO粉末时测出的ESR单峰,推断它是电子从~1eosine~*注入到ZnO之导带尔后再转移至O_2所形
Since Vogel’s discovery that dyes can broaden the sensitivities of silver halide, considerable progress has been made in the application of dyes in silver halide photography and spectral sensitization theory. Gilman and Kuhn et al. Proposed electron transfer and energy transfer in spectral sensitization Theory.With the advent of modern spectroscopic methods, it provides the preconditions for understanding the primary process of spectral sensitization.If Tani observes the ESR singlet when silver cyanide powder (or emulsion) Is the origin of dyes and silver halide valence band positive hole dye positive hole free radicals generated Honda and so on according to light absorption of ZnO powder eosine measured ESR singlet, infer that it is from ~ 1eosine * * injection of ZnO The lead then later transferred to the O_2 form