Naik Nirmala S, Shastri Lokesh A, Bathula Chinna, Chougala Bahubali, Shastri Samundeeswari, Holiyachi Megharaja, Sunagar Vinay
Department of Chemistry, Karnatak University, Dharwad, 580 003, India.
Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea.
J Fluoresc. 2017 Mar;27(2):419-425. doi: 10.1007/s10895-016-2018-6. Epub 2017 Jan 9.
A series of novel tricoumarin-pyridines have been synthesized by the reaction of 4-formyl coumarins and substituted 3-acetylcoumarin with ammonium acetate for the application in organic electronics as well as fluorescent dyes. The structures of all new compounds were confirmed and characterized by IR, H NMR and ESI-Mass analysis. All the important photo physical prerequisites for organic electronic application such as strong and broad optical absorption, thermal stability were determined for the synthesized molecules. Optical properties were studied by UV-Vis absorption and fluorescence spectroscopy. Optical band gaps of the tricoumarin-pyridines were found to be 2.72-3.10 eV as calculated from their onset absorption edge. The tricoumarin-pyridines were thermally stable up to 290-370 °C as determined by thermogravimetric analysis (TGA). Photophysical studies indicate the synthesized materials are promising candidates for organic electronic applications.
通过4-甲酰基香豆素和取代的3-乙酰基香豆素与乙酸铵反应，合成了一系列新型三香豆素-吡啶，用于有机电子学以及荧光染料领域。所有新化合物的结构均通过红外光谱（IR）、氢核磁共振（H NMR）和电喷雾电离质谱（ESI-Mass）分析进行了确认和表征。针对合成的分子，测定了有机电子应用的所有重要光物理先决条件，如强烈且宽泛的光吸收、热稳定性。通过紫外可见吸收光谱和荧光光谱研究了光学性质。从起始吸收边缘计算得出，三香豆素-吡啶的光学带隙为2.72 - 3.10电子伏特。通过热重分析（TGA）确定，三香豆素-吡啶在高达290 - 370°C的温度下具有热稳定性。光物理研究表明，合成材料是有机电子应用的有前途的候选材料。
