1,1'-diethyl-2,2'-cyanine iodide |
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| The chemical structure of 1,1'-diethyl-2,2'-cyanine iodide is shown at the right. The absorption and fluorescence emission spectra are shown below. The structure, absorption, and fluorescence data were all obtained from the PhotochemCAD package by Jonathan Lindsey. This excellent program allows rapid comparison of spectra and enables one to do a variety of photochemically relevant calculations. |
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Absorption
This is a graph of the molar extinction coefficient of 1,1'-diethyl-2,2'-cyanine iodide dissolved in ethanol. It was measured by R. A. Fuh on summer, 97 [H. Du, R. A. Fuh, J. Li, A. Corkan, J. S. Lindsey, "PhotochemCAD: A computer-aided design and research tool in photochemistry," Photochemistry and Photobiology, 68, 141-142, 1998]. 1,1'-diethyl-2,2'-cyanine iodide has a molar extinction coefficient of 54,000 M-1cm-1 at 524.25 nm [C. J. Tredwell and C. M. Keary, "Picosecond time resolved fluorescence lifetimes of the polymethine and related dyes.," Chem. Phys., 43, 307-316, 1979]. Due to the expected low fluorescence yield, estimated to be 0.001 [C. J. Tredwell and C. M. Keary, "Picosecond time resolved fluorescence lifetimes of the polymethine and related dyes.," Chem. Phys., 43, 307-316, 1979], a fluorescence spectrum was not collected. |
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