Two-photon induced fluorescence of novel dyes

Three novel compounds, trans-2-[ p-(N-ethyl-N-(hydroxyethyl)amino)styryl] i odide (1), trans-2-[ p-( N-ethyl-N-(hydroxyethyl)amino)styryl]- 1',3',3'-tr imethylindolium iodide (2), and trans-2-[ p-( N, N-dimethylamino)styryl]- 1 ',3',3'-trimethylindolium iodide (3), were synthesized and their two-photon induced fluorescence behavior was studied. Under excitation by 1064 nm las er irradiation, the solutions of these compounds exhibit two-photon induced fluorescence with lambda(max) at 639, 666 and 665 nm for 1, 2 and 3 respec tively. (C) 1999 Elsevier Science B.V. All rights reserved.