Synthesis and Characterization of Molecules Containing Thiazole and Oxazole Moieties and Study of ESIPT Phenomenon
作者:Manjaree A. Satam、Rajesh K. Raut、Abhinav B. Tathe、N Sekar
DOI:10.1007/s10895-012-1064-y
日期:2012.9
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.
两种新型ESIPT分子,2-[4-(1,3-苯并噻唑-2-基)萘[1,2-d][1,3]噁唑-2-基]苯酚9a和4-[4-(1,3-苯并噻唑-2-基)萘[1,2-d][1,3]噁唑-2-基]苯-1,3-二醇9b,分别通过将1-amino-3-(1,3-苯并噻唑-2-基)萘-2-醇与2-羟基苯甲酸和2,4-二羟基苯甲酸缩合而成。通过FT-IR、1H NMR、质谱和元素分析对这些新化合物进行了表征。研究了极性对光物理性质、吸收和发射的影响。这些化合物由于ESIPT现象显示出单一吸收和双重发射。使用Gaussian 03软件研究了由于ESIPT现象导致的结构变化,包括键角、键距和几何形状。这两种新型ESIPT分子在200°C下具有热稳定性。