Synthesis and electronic properties of expanded 5-(hetero)aryl-thien-2-yl substituted 3-ethynyl quinoxalines with AIE characteristics
作者:Franziska K. Merkt、Thomas J. J. Müller
DOI:10.1007/s11426-018-9295-4
日期:2018.8
emission color of the quinoxaline based chromophores can be conveniently accomplished by the remote substituent group. The determined absorption and emission maximum as well as the Stokes shifts strongly correlate with Hammett σp+ parameters. Besides, photophysical properties of selected derivatives in the solid state, biphasic solutions, and PMMA films, along with their relationships, are comparatively
通过铃木和Buchwald-Hartwig偶联相应的溴化3-乙炔基,以中等至非常好的收率合成了扩展的5-(杂)芳基-噻吩-2-基取代的3-乙炔基喹喔啉染料。喹喔啉。铃木规程也可提供哑铃形的双(噻吩基3-乙炔基喹喔啉)。通过紫外和荧光光谱研究了光物理性质。所获得的大多数化合物在溶液中均显示荧光,其中一些也呈固态。另外,可以通过远程取代基方便地完成基于喹喔啉的发色团的发射颜色的调节。所确定的吸收和发射最大值以及斯托克斯位移与哈米特σ密切相关p +参数。此外,还对固态,双相溶液和PMMA薄膜中所选衍生物的光物理性质及其关系进行了比较研究。此外,两种5-(杂)芳基-噻吩-2-基取代的3-乙炔基喹喔啉染料是通过分子运动的限制而指示的聚集诱导发射(AIE)发色团。共价限制的3-乙炔基喹喔啉支持分子旋转的抑制是乙腈/水混合物中荧光显着增强的原因。