石墨烯位置对SY荧光淬灭效率的影响规律研究

Influence of the position of Gr on fluorescence quenching efficiency of SY

荧光淬灭被广泛应用于生物检测、环境检测以及重金属检测等领域。研究表明,石墨烯(graphene,Gr)是一种有效的荧光淬灭剂,可以淬灭各种有机染料涂层。以超级黄色发光PPV共聚物(super yellow,SY)作为荧光染料,通过制备4种不同叠层结构来研究石墨烯的位置对SY荧光淬灭的影响规律,并分析其淬灭机理。结果表明Gr/SY/Gr结构的荧光淬灭效率最佳,且淬灭机理为基于电子转移的动态淬灭。该研究将促进石墨烯在生物传感器、生物荧光标记、环境污染检测等领域的应用。

Fluorescence quenching is widely used in biological detection,environmental detection,and heavy metal detection.Previous studies have shown that Gr is an effective fluorescence quencher which can quench various organic dye coatings.In this paper,the super yellow light-emitting PPV copolymer(super yellow,SY)was used as the fluorescent dye.We study the effect of the position of Gr layers on the fluorescence quenching by preparing four different stacked structures and analyze the quenching mechanism.The results show that the Gr/SY/Gr structure has the best fluorescence quenching efficiency,and the quenching mechanism is dynamic quenching based on electron transfer.This study promotes the application of Gr in biosensors,bioluminescent labeling,environmental pollution detection and other fields.