Fluorescence Control on Panchromatic Spectra via C-Alkylation on Arylated Quinoxalines

A coherent green fluorescence was obtained by butylation at the 2-position of panchromatic 2,3-diaryl-5,8-diarylquinoxalines (2) to give corresponding 2-butyl-2,3-diaryl-5,8-diaryl-1H-quinoxalines (3). Full color quinoxaline derivatives (2) were prepared from electronic modification at either the 2,3- or 5,8-positions at the peripheral ArX group or X group (X = −H, −OMe, −NPh2, −NMe2, −NMePh) of the quinoxalines. 2-Butylation converted one imine unit of the pyrazine ring to an amine group, which effectively altered the electron donor and acceptor functions to produce a coherent green fluorescence.

对全色2,3-二芳基-5,8-二芳基喹喔啉（2）的2位进行丁基化反应，得到对应的2-丁基-2,3-二芳基-5,8-二芳基-1H-喹喔啉（3），可获得相干绿色荧光。全色喹喔啉衍生物（2）可通过在喹喔啉的外围ArX基团或X基团（X=-H、-OMe、-NPh₂、-NMe₂、-NMePh）的2,3-位或5,8-位进行电子修饰来制备。2位丁基化反应将吡嗪环中的一个亚胺单元转化为氨基，这一变化有效改变了电子给体与受体的功能，从而产生出相干绿色荧光。