Perylenes substituted with trimethylsilylethynyl, tert-butylethynyl and trimethylsilylbutadiynyl groups were prepared, and their photophysical and photochemical properties were investigated through measurements of fluorescence yields, lifetimes, and triplet-triplet absorption. Introduction of these groups caused little change in the rates of fluorescence, but decreased the fluorescence yields and substantially enhanced the rates of non-radiative processes. Observation of the triplet absorption was evident for the origin of the enhanced non-radiative process by the substitution with the triple bond(s). (C) 2012 Elsevier B. V. All rights reserved.