Dithieno-annulated benzo[g]coumarins were synthesized in excellent yields using a facile photochemical oxidative cyclization method. These π-expanded benzocoumarins displayed strong absorption in the near-UV/visible region. Moreover, they revealed visible blue to yellow emission in solution when compared to simple benzo[g]coumarins or thienoannulated coumarins. This suggests their possible use in bio-imaging.

中文翻译：

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二噻吩并-环化苯并[克合成：]香豆素通过氧化Photocyclization并研究其光物理性质的

使用简便的光化学氧化环化方法以高收率合成了二噻吩并环化的苯并[ g ]香豆素。这些π-膨胀的苯并香豆素在近紫外/可见光区域显示出强吸收性。此外，与简单的苯并[ g ]香豆素或硫代环化香豆素相比，它们在溶液中显示出可见的蓝色至黄色发射。这表明它们可能在生物成像中使用。