The inclusion compounds of iodine such as -cyclodextrin-KI-I-2-4H(2)O, -cyclodextrin-KI-I-2-H2O, and amylose-iodine are hydrogen bonded with dyes such as Para red, Congo red, Direct red, Bismark brown, Trypan blue, and Evans blue. Hydrogen bonding of these with dyes containing OH and NH occurs in glucosidic oxygen atoms or OH groups of the polysaccharides. Excitons are emitted and absorbed by the electrons along the iodine chains as revealed by the analysis, which reduces band gap along the polyiodide chains.