Fine Chemistry and Engineering Research Institute, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China.
Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng 475004, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Aug 14;129:7-13. doi: 10.1016/j.saa.2014.03.018. Epub 2014 Mar 22.
Two series of quinoline derivatives containing pyrazole group were synthesized and characterized by means of (1)H NMR, FT-IR, MS, elemental analysis and X-ray single crystal diffraction, and their UV-vis absorption behavior and fluorescence properties were also measured. Moreover, the effects of acetic acid and triethylamine on the spectroscopic properties of synthesized products were examined with compounds 3a and 5a as examples. It has been found that all synthesized quinoline derivatives show maximum absorption peak at 303 nm and emission peaks around 445 nm. Besides, both acetic acid and triethylamine can change the acidity of the medium, thereby influencing the UV-vis absorption spectra and fluorescence spectra of synthesized products. Moreover, theoretical investigations indicate that the integration of H(+) and N atom of quinoline ring favors the formation of a new product in the presence of acetic acid, and the product obtained in this case shows a new UV-vis absorption peak at 400 nm.
合成了两个系列含有吡唑基团的喹啉衍生物，并通过 1H NMR、FT-IR、MS、元素分析和 X 射线单晶衍射进行了表征，还测量了它们的紫外-可见吸收行为和荧光性质。此外，还以化合物 3a 和 5a 为例，考察了乙酸和三乙胺对合成产物光谱性质的影响。结果表明，所有合成的喹啉衍生物在 303nm 处均显示出最大吸收峰，在 445nm 左右处显示出发射峰。此外，乙酸和三乙胺都可以改变介质的酸度，从而影响合成产物的紫外-可见吸收光谱和荧光光谱。此外，理论研究表明，在乙酸存在下，喹啉环上 H(+)和 N 原子的结合有利于形成新产物，而在这种情况下得到的产物在 400nm 处显示出新的紫外-可见吸收峰。
