Course

Module 1 : Colour ChemistryColour, colour wheel, complementary colour, Theories of colour and chemical Constitution:Witts chromophore auxochrome theory, Resonance theory, Modern theories of colour:Valence bond theory, Molecular Orbital theory.Module 2: Chemistry of DyesRequirement of dyes, Chemical nature, Classification: Natural and synthetic, Based onstructure: (a) Triphenyl methane, (b) Azo dyes (c) Anthraquinone dyes (d) Indigoid dyes (e)Xanthene dyes (f) Cyanine dyes (g) Squaraine dyes (h) Croconine dyes, Classification basedon application. Quantitative Evaluation of Dyes: Pariser-Parr-Pople molecular orbital method(PPP MO), Huckel molecular orbital (HMO).Module 3. Nomenculture and synthesis of representative dyesBased on Colour Index alphabets : B, C, G, 2G, 3G, H, HE, L, ME, R. General methods ofSynthesis of dyes: (a) Cyanines, (b) Hemicyanines, (c) Squaraines (d) Azo dyes, (e)croconaines. Synthesis of individual dyes such as Aminosquaraines, Alizarin, Mercurochrome-Red, Congo-Red, Amido Black 10B, Procion Red, Fuchsine.Module 4 : Applications of DyesAppication in PDT, Sensing, Bioimaging, Photovotaic devices, paint industry, Non linearoptical applications of Dyes, Applications of encapsulated Squaraine dyes, BioconjugatedSquaraine dyes, Aggregation properties and applications of cyanine dyes, Solar cellapplications, Miscellaneous applications.Module 5 : Chemistry of PigmentsThe flower pigments: Anthocyanins, Flavones, structure of Delphinidin Chloride,Pelargonidine Chloride, Quercitin. Phthalocyanine : Copper Phthalocyanine, applications.Carotenoids: structure of ?- carotene, lycopene, application in food industry. Fluorescentbrightening agents: synthesis and applications of Blankophor R, Blankophor WT. InorganicPigments.

Text books /References[1] Dyes and Pigments: New Research: Arnold R. Lang, Nova Science Publishers,Inc.2008.[2] Modern Organic Chemistry, Jain, M.K. & Sharma, S.C. Vishal Publishing Co.2010.[3] Handbook of natural dyes and pigments: Har Bhajan Singh, Kumar, AvinashBharati, Woodhead Publishing India Pvt Ltd, 2014.[4] Handbook of Fluorescent Dyes and Probes: R. W. Sabnis, Wiley, 2015