4. The spectra of other types of cyanine dyes, which have been discussed ex-tensively in the literature (9-11), can be represented by the simplified general formula An example is the family of thiacarbocyanine dyes Cyanine Dyes: Unmodified PB . Legal. Hence, we run the MATLAB routine on dyes 1, 2, and 3 or dyes 4, 5, and 6 only. 4: Absorption Spectrum of Conjugated Dyes is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. 0000008795 00000 n 0000004531 00000 n Nguyen Quoc Trung. \[p=n_{i}=\frac{N}{2} \] \[ n_{f}=n_{i}+1\] \[ \Delta E = \frac{h^{2}}{8mL^{2}} \left [ \left ( p + 1 \right )^{2} - p^{2}\right ] \] \[ \Delta E = \frac{h^{2}}{8mL^{2}} \left ( 2p+1 \right ) \] Hb```f``c`e``ce@ ^yLPeP%-By:gTL9=\\.yJ[wO6>;2X2A8-,%%7RhhChX@9HK%X(^7\{S.T9]^VktH_gbf-[ty&lbt )\ endstream endobj 91 0 obj 281 endobj 63 0 obj << /Type /Page /Parent 60 0 R /Resources 64 0 R /Contents [ 69 0 R 73 0 R 78 0 R 80 0 R 82 0 R 84 0 R 86 0 R 88 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 64 0 obj << /ProcSet [ /PDF /Text ] /Font << /F2 74 0 R /TT2 66 0 R /TT4 70 0 R >> /ExtGState << /GS1 89 0 R >> /ColorSpace << /Cs5 67 0 R >> >> endobj 65 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 0 /Descent -211 /Flags 32 /FontBBox [ -628 -376 2000 1010 ] /FontName /Arial-BoldMT /ItalicAngle 0 /StemV 133 >> endobj 66 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 150 /Widths [ 278 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 556 0 0 0 0 0 0 0 333 0 0 0 0 0 0 722 722 722 722 667 0 0 0 0 0 0 0 0 0 778 667 778 722 667 611 0 0 0 0 0 0 0 0 0 0 0 0 556 611 556 611 556 333 611 611 278 278 0 278 889 611 611 611 0 389 556 333 611 0 778 556 556 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 556 ] /Encoding /WinAnsiEncoding /BaseFont /Arial-BoldMT /FontDescriptor 65 0 R >> endobj 67 0 obj [ /CalRGB << /WhitePoint [ 0.9505 1 1.089 ] /Gamma [ 2.22221 2.22221 2.22221 ] /Matrix [ 0.4124 0.2126 0.0193 0.3576 0.71519 0.1192 0.1805 0.0722 0.9505 ] >> ] endobj 68 0 obj 764 endobj 69 0 obj << /Filter /FlateDecode /Length 68 0 R >> stream Dr. Dharshi Bopegedera Using the Particle in a box model to investigate the Absorption Spectra of Conjugated Dyes. b) From the absorption spectrum of conjugated dye investigated, the wavelength of maximum absorption increases with increasing conjugation. For dyes 1 and 3, the absolute percent errors are 8.79% and 3.64%, respectively, while the absolute percent error is the greatest for dye 4 (21.7%). >> These dyes are typically $100-$300 per gram and so it is important not to waste the materials. Swenberg, Electronic Processes in Organic Crystals, (Oxford University Press, New York, 1982), Chapter 1D. N = 2j + 2 = 2(2) + 2 = 6 pi electrons Ephoton = h v = Emolecule = Eupper state Elower State (1)
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