C3-thiacyaninedye |
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| The chemical structure of Thiacarbocyanine (C3)dye, n-propanol 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 Thiacarbocyanine (C3)dye dissolved in n-propanol. It was measured by R. A. Fuh on 6/28/95 [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]. Thiacarbocyanine (C3)dye, n-propanol has a molar extinction coefficient of 161,000 M-1cm-1 at 560 nm [P. J. Sims, A. S. Waggoner, C.-H. Wang, and J. F. Hoffman, "Studies on the mechanism by which cyanine dyes measure membrane potential in red blood cells and phosphatidylcholine vesicles," Biochem., 13, 3315-3330, 1974]. The extinction coefficient also has been reported to be 126,000 cm-1/M [C. J. Tredwell and C. M. Keary, "Picosecond time resolved fluorescence lifetimes of the polymethine and related dyes.," Chem. Phys., 43, 307-316, 1979]. The fluorescence yield also has been reported to be 0.05 [C. J. Tredwell and C. M. Keary, "Picosecond time resolved fluorescence lifetimes of the polymethine and related dyes.," Chem. Phys., 43, 307-316, 1979], and 0.045 in methanol [S. Rentsch, R. Danielius, and R. Gadonas, "Bestimmung von Lebensdauern und Transientenabsorptionsspektren von Polymethinfarbstoffen aus pikosekunden-spektroskopischen Messungen.," J. Signalaufz.-Mater., 12, 319-328, 1984]. |
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Fluorescence
This is the fluorescence emission spectrum of Thiacarbocyanine (C3)dye, n-propanol dissolved in PrOH. The spectrum was taken by R. A. Fuh on 6/24/95 using an excitation wavelength of 520 nm [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]. The quantum yield is 0.05 [V. A. Kuzmin and A. P. Darmanyan, "Study of sterically hindered short-lived isomers of polymethine dyes by laser photolysis.," Chem. Phys. Lett., 54, 159-163, 1978]. |
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