New benzoxazinone type dyes have been synthesized by the reaction of α-keto esters on 2-amino-5-(dialkylamino)phenols. The obtained 7-dialkylamino-2H-1,4-benzoxazin-2-ones show a strong fluorescence and a large Stokes shift, reaching 183 nm. An effect of 15 various substituents in position 3, together with a solvent effect have been characterized on their absorption and emission bands. Linear free energy relationships allow the tuning of their spectroscopic characteristics over a large spectral range.
新型苯并
噁唑酮类染料通过α-
酮酯与2-
氨基-5-(二烷基
氨基)
苯酚的反应合成。所获得的7-二烷基
氨基-2H-1,4-苯并
噁唑酮显示出强烈的荧光和大斯托克斯位移,达到了183纳米。对位于3位的15种不同取代基以及溶剂效应对其吸收和发射带的影响进行了表征。线性自由能关系允许在较大光谱范围内调节其光谱特性。