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Novel luminescence dyes having benzoxazole 3 and benzthiazole 4 moieties were synthesized and characterized. Zinc (II) complex dyes 5 and 6 were consecutively prepared and their corresponding light emitting properties were also studied with respect to the photoluminescence (PL) functions of the dyes 3 and 4. The strong light emitting properties and their resulting PL spectra were observed from the dyes 3 and 5, namely dyes having benzoxazole moieties. To expect the molecular conformation, theoretical modeling calculation were performed to determine the molecular interatomic distance and dihedral angle due to the limitation of single crystal formation from polymeric dye molecules. [ABSTRACT FROM AUTHOR]

The inclusion complex properties of the multichromic dye in DMSO with three different type of cyclodextrins, namely α-, β- and γ-cyclodextrin were studied by absorption spectra measurements. The first order fading rates were also calculated by decoloration properties of the three inclusion complex conditions. Futhermore, the inclusion complex of different sizes of cyclodextrins was compared, which showed the evident decoloration data for interaction of the multichromic dye and cyclodextrins. [ABSTRACT FROM AUTHOR]

Polymethine dyes have been synthesized using bis-dimethylaminophenylethylene compound. These dyes can be converted to the colorless leuco form by the treatment with alkali. Interestingly, these leuco dyes showed reversible color formation properties with following acid addition. The feasibility of the use as thermochromic indicator was investigated using bisphenol A and 1-hexadecanol. [ABSTRACT FROM AUTHOR]