Time-resolved excited state dynamics of a cyanine dye
نویسندگان
چکیده
X Ž . The photophysics and isomerization dynamics in the excited state of a cyanine dye, 3,3 -di 3-sulfopropyl -thiacyanine triethylaminium salt was investigated. Using the femotosecond time-resolved fluorescence up-conversion technique, wavelength-dependent fluorescence dynamics was observed and the theoretical prediction of the dual fluorescence behavior was vindicated. The results were explained using a barrierless isomerization reaction model. The origins of two decay components were assigned to the relaxation within the excited state and the S TMS transition, respectively, and the time 1 0 constants were obtained. q 1998 Elsevier Science B.V. All rights reserved.
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تاریخ انتشار 1998