Three at a time: The wavelength dependence of nonlinear absorption and nonlinear refraction of a peripherally nitrophenylethynyl-functionalized first-generation arylethynylruthenium dendrimer (see picture; dppe=1,2-bis(diphenylphosphanyl)ethane) was examined in the range 625–1500 nm by employing fs pulses. The compound is a strong two-photon absorber in the range 600–800 nm and an exceptional three-photon absorber in the range 1100–1200 nm.
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Samoć et al. (2006) studied this question.
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