Correlation of Color & Colorant Constituents
- Introduction to the relationship between color and the constitution of organic colorants, an overview of navel applications of organic colorants
- Early theories of color: Graebe-Lieberman theory, Witt theory or chromophore-Auxochrome theory, Armstrong’s theory (quinonoid’s theory), resonance theory (Bayer’s theory or Taotumeric theory, Adams-Rosenstein theory and Bury theory
- Modern theories of color: Valence bond theory, Molecular orbital theory, Dewar’s rule
- An overview of the properties of organic colorants, classification of organic colorants according to chemical structure
- Fluorescence and phosphorescence phenomena, the effect of different factors on emission, Jablonsky diagram
- Quantitative Applications of Molecular Orbital Theory in Electron Stimulation: Molecular Orbitals and Light Absorption, Free Electron Molecular Orbital Theory, Huckel Molecular Orbital Theory, Pariser-Parr-Pople Molecular Orbital Theory
- Effect of different chemical groups on the maximum wavelength absorption of organic colorants, Bathochromic shift, Hypsochromic shift, Hyperchromic effect, Hypochromic effect, Solvatochromic effect, Halochromic effect, Ways to increase the maximum wavelength of organic colorants adsorption , Hammett substituent constant
- Qualitative relationship between color and the constitution of organic colorants, classification of organic colorants, resonance and color theory, failure of resonance theory, molecular orbital difference theory
- Investigation of ?- ? * and n- ? * chromophores, general characteristics of absorption bands of different groups including carbonyl group, imino group, azo group, nitroso group, thionitroso group and thiocarbonyl group
- Donor-acceptor chromogens (simple acceptors), General characteristics of donor-acceptor chromogens, Merocyanine type compounds (carbonyl and nitro acceptor group) Nitro diphenylamines, Nitrophenylhydrazones and Cyano acceptors
- Donor-acceptor chromogens (complex acceptors), complex acceptor structure classification, Donor substituted quinones, donor substituted compounds, azo colorants: orthohydroxy azo metal complexes, indigoid chromogens, zwitter ion chromogens
- Chromogens based on non-cyclic and cyclic polyene systems, general characteristics, non-cyclic polyenes, polycyclic benzenoid compounds including annulenes, porphyrins
- Cyanine-type chromogens, general characteristics, cyanine type dyes, di and tri-aryl methane dyes and their heterocycles
- Approaches to the design and synthesis of infrared absorbent dyes, ways to increase the maximum absorption wavelength of organic colorants
- summarizing and answer to the questions, seminar presentation by students