Squarylium dye III |
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| The chemical structure of Squarylium dye III 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 Squarylium dye III dissolved in dichloromethane. It was measured by Junzhong Li on 12/11/97 [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]. Squarylium dye III has a molar extinction coefficient of 309,000 M-1cm-1 at 627.3 nm [K.-Y. Law, "Squaraine chemistry. Effects of structural changes on the absorption and multiple fluorescence emission of bis[4-(dimethylamino) phenyl]squaraine and its derivatives.," J. Phys. Chem., 91, 5184-5193, 1987].
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Fluorescence
This is the fluorescence emission spectrum of Squarylium dye III dissolved in dichloromethane. The spectrum was taken by Junzhong Li on 12/11/97 using an excitation wavelength of 565 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 0.65 [K.-Y. Law, "Squaraine chemistry. Effects of structural changes on the absorption and multiple fluorescence emission of bis[4-(dimethylamino) phenyl]squaraine and its derivatives.," J. Phys. Chem., 91, 5184-5193, 1987]. |
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