Synthesis of triazine based dialdehyde Schiff's base – new templates for Molecular Imprinting and study of their structural and photophysical properties

Triazine based dialdehyde (DIPOD) and its Schiff's base derivatives were designed and synthesized from cyanuric chloride as template for Molecular Imprinting. Density functional theory calculation results revealed that the distance between two aldehyde groups is 1.3 nm. Synthesized structurally the rigid template having 1,3,5-triazine as core moiety, has been used as template to introduce two appropriately spaced amino groups for substrate binding on the solid surface of silica. The structures of the synthesized DIPOD and its Schiff's base were characterized by FT-IR, 1H NMR, 13C NMR, and UV–Vis spectral analysis. Thermogravimetric analysis showed that the compound has thermal stabilities above 300 °C

Synthesis and characterization of molecules containing thiazole and oxazole moieties and study of ESIPT phenomenon

Two novel ESIPT molecules, 2-[4-(1,3-benzothiazol-2-yl)naphtho[1,2-d][1,3] oxazol-2-yl]phenol 9a and 4-[4-(1,3-benzothiazol-2-yl)naphtho[1,2-d][1,3]oxazol- 2-yl]benzene-1,3-diol 9b were synthesized by condensing 1-amino-3-(1,3- benzothiazol-2-yl)naphthalen-2-ol with 2-hydroxybenzoic acid and 2,4-dihydroxybenzoic acid respectively. The novel compounds were characterized by FT-IR, ¹H NMR, Mass spectral and elemental analysis. Effect of polarity on photo physical properties, absorption and emission were studied. Compounds showed single absorption and dual emission due to ESIPT phenomenon. The structural changes due to ESIPT phenomenon in terms of bond angle, bond distances and geometry were investigated by using Gaussian 03 software. These two novel ESIPT molecules are thermally stable up to 200 °C.12 page(s