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AmBeed文献解读| Molecules: 研究供体和炔间隔基团对供体-受体-供体呫吨染料性能的影响


研究背景:

有机染料在多个领域中具有重要应用,包括发光二极管、有机光伏、染料敏化太阳能电池、光动力疗法、生物传感和成像等。呫吨染料因其独特的分子开关机制,适用于生物传感和成像,特别是荧光素和罗丹明这两类呫吨染料因其高荧光量子产率、大摩尔吸收系数、高光稳定性和水溶性而被广泛用于细胞成像和传感应用。

研究内容:

研究团队通过Sonogashira偶联反应合成了四种常见的含有炔间隔基团的D-A-D近红外(NIR)呫吨染料(图1),其中氧和氮供体D-1至D-4,分别为苯甲醚、N,N-二甲基苯胺、N,N-二苯基苯胺和N-苯基咔唑(均来自于AmBeed品牌)。

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全文总结:

作者通过Sonogashira偶联反应,合成了一系列带有炔间隔基团的近红外呫吨染料,目的是探究间隔基团和供体对染料的最大吸收波长及其分子开关(开环)过程的影响。实验结果表明,炔间隔基团的引入能够延长染料的共轭结构,这导致与未含炔基的染料相比,吸收波长更长。此外,强电荷转移供体能够将吸收波长移向近红外区域,而具有强π-供电子能力的供体则导致呫吨染料的平衡常数较小。DFT/TDDFT的计算结果在大多数情况下与实验结果相吻合。

DOI:10.3390/molecules28134929





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