Synthesis and Fluorescence Spectra of Triazolylcoumarin Fluorescent Dyes

Much attention is devoted to fluorescent dyes especially those with potential in versatile applications. Reactions under "click" conditions between nonfluorescent 3 - azidocoumarins and terminal alkynes produced 3 -(1, 2, 3- triazol- 1 - yl)cournarins, a novel type of fluorescent dyes with intense fluorescence. The structures of the new coumarins were characterized by 1H NMR, MS, and IR spectra. Fluorescence spectra measurement demonstrated excellent fluorescence performance of the triazolylcoumarins and this click reaction is a promising candidate for bioconjugation and bioimaging applications since both azide and alkynes are quite inert to biological systems.     

水力自控水处理工艺絮凝区数值模拟

絮凝是水处理最重要的环节之一,对水处理的效果影响很大。文章从数值模拟的角度,模拟水力自控工艺进水口在不同倾角情况下的絮凝效果,并依此为根据改进水力自控工艺。结果证明,在不同进水流量和不同进口倾角的情况下,当水力自控工艺在进水口倾角为45°时,水力自控工艺的絮凝效果最佳。