Yang Youjun, Lowry Mark, Schowalter Corin M, Fakayode Sayo O, Escobedo Jorge O, Xu Xiangyang, Zhang Huating, Jensen Timothy J, Fronczek Frank R, Warner Isiah M, Strongin Robert M
Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.
J Am Chem Soc. 2006 Nov 1;128(43):14081-92. doi: 10.1021/ja0632207.
The synthesis of new benzo[a]- and [b]xanthene dye frameworks is described. A unique benzo[a]xanthene, seminaphtho[a]fluorone (SNAFR-1), is studied in a variety of media. The optimization of solution parameters and excitation wavelengths allows SNAFR-1 to display red, green, and blue emission bands of approximately equal intensities and also to produce white light. Ratiometric red (anion) and green (neutral) emissions are observed upon varying solution pH. A pH-independent violet-blue emission band is due to the addition of nucleophiles to the benzylic carbon of SNAFR-1.
描述了新型苯并[a]和[b]呫吨染料骨架的合成。研究了一种独特的苯并[a]呫吨，即半萘并[a]芴（SNAFR-1）在多种介质中的情况。溶液参数和激发波长的优化使SNAFR-1能够显示强度大致相等的红、绿和蓝发射带，并且还能产生白光。改变溶液pH值时可观察到比例式的红色（阴离子）和绿色（中性）发射。与pH无关的紫蓝色发射带是由于亲核试剂添加到SNAFR-1的苄基碳上所致。
