Abstract
Cyanuric chloride was allowed to react with N,N-diethylaniline to obtain 4-(4,6-dichloro-1,3,5-triazin-2-yl)-N,N-diethylaniline, which was converted into six novel 1,3,5-trisubstituted triazine derivatives on reaction with different amino acids. These compounds had UV absorption in the range 352–379 nm, accompanied by intense single emission in the range 420–497 nm with fairly good quantum yield (0.106–0.383). The new compounds were characterized by FT-IR, 1H NMR, 13C NMR, mass spectral, and elemental analyses. These fluorophores were conjugated with protein bovine serum albumin through carbodiimide chemistry between the negatively charged carboxylate groups (-COO-) of the fluorophore and the surface terminated positively charged amino groups (-NH3
+) of the protein. The interaction between functionalized amino acids with protein molecules was investigated using fluorescence spectroscopy showing fluorescence enhancement or quenching of the fluorophore after conjugation.
氰尿酸氯与N,N-二乙基苯胺反应,得到4-(4,6-二氯-1,3,5-三嗪-2-基)-N,N-二乙基苯胺,再与不同氨基酸反应,形成六种新的1,3,5-三取代三嗪衍生物。这些化合物在352-379 nm范围内具有紫外吸收,伴随着在420-497 nm范围内强烈的单一发射,具有相当良好的量子产率(0.106-0.383)。新化合物通过FT-IR、1H NMR、13C NMR、质谱和元素分析进行表征。这些荧光团通过碳二亚胺化学与蛋白牛血清白蛋白结合,通过荧光团的负电荷羧基(-COO-)与蛋白质表面终止的带正电氨基(-NH3+)之间的化学反应。利用荧光光谱技术研究了功能化氨基酸与蛋白质分子之间的相互作用,显示出共轭后荧光团的荧光增强或猝灭。