HERCULES Laboratory, IN2PAST-Associate Laboratory for Research and Innovation in Heritage, Arts, Sustainability and Territory, University of Évora, Largo Marquês de Marialva 8, 7000-809 Évora, Portugal.
Department of Chemistry and Biochemistry, School of Sciences and Technology, University of Évora, Rua Romão Ramalho 59, 7000-671 Évora, Portugal.
Molecules. 2023 Sep 27;28(19):6822. doi: 10.3390/molecules28196822.
Fluorescent labels are key tools in a wide range of modern scientific applications, such as fluorescence microscopy, flow cytometry, histochemistry, direct and indirect immunochemistry, and fluorescence in situ hybridization (FISH). Small fluorescent labels have important practical advantages as they allow maximizing the fluorescence signal by binding multiple fluorophores to a single biomolecule. At present, the most widely used fluorescent labels available present small Stokes shifts and are too costly to be used in routine applications. In this work we present four new coumarin derivatives, as promising and inexpensive fluorescent labels for biomolecules, obtained through a cost-effective, efficient, and straightforward synthetic strategy. Density functional theory and time-dependent density functional theory calculations of the electronic ground and lowest-lying singlet excited states were carried out in order to gain insights into the observed photophysical properties.
荧光标记物是广泛的现代科学应用中的关键工具，例如荧光显微镜、流式细胞术、组织化学、直接和间接免疫化学以及荧光原位杂交（FISH）。小荧光标记物具有重要的实际优势，因为它们可以通过将多个荧光团结合到单个生物分子上来最大程度地提高荧光信号。目前，最广泛使用的荧光标记物具有较小的斯托克斯位移，而且成本过高，无法在常规应用中使用。在这项工作中，我们通过一种具有成本效益、高效且直接的合成策略，提出了四种新的香豆素衍生物，作为有前途且廉价的生物分子荧光标记物。为了深入了解观察到的光物理性质，进行了电子基态和最低单重激发态的密度泛函理论和含时密度泛函理论计算。
