Samoc, MarekMorrall, JosephDalton, GulliverCifuentes, MarieHumphrey, Mark2015-12-081433-7851http://hdl.handle.net/1885/35295Three at a time: The wavelength dependence of nonlinear absorption and non-linear 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. (Chemical Equation Presented).Keywords: Light absorption; Light refraction; Nonlinear optics; Organometallics; Photons; Ruthenium; Alkynyl ligands; Organometallic dendrimers; Two-photon absorbers; Dendrimers Absorption; Alkynyl ligands; Dendrimers; Nonlinear optics; Ruthenium200710.1002/anie.2006023412015-12-08