Graphene oxide-controlled neutral versus cationic form of a red emitting dye: enhancement of fluorescence by graphene oxide
Graphene oxide-controlled neutral versus cationic form of a red emitting dye: enhancement of fluorescence by graphene oxide
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DOI：
10.1039/d1cc03464b
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发表时间：
2021-10-13
影响因子：
4.9
通讯作者：
Seth, Debabrata
中科院分区：
文献类型：
--
作者：
Bapli, Aloke;Seth (Duley), Soma;Seth, Debabrata
在氧化石墨烯 (GO) 存在的情况下，纯溶剂介质中荧光团的荧光增强鲜为人知。有必要从基础科学角度重新审视GO的作用。在此，我们报道了GO控制红色发光分子从中性形式到阳离子形式的转化。除此之外，在接受质子的溶剂介质存在下，GO 的作用根据 GO 的浓度从荧光增强剂转变为荧光猝灭剂。分子间质子从 GO 表面转移到荧光团是造成这种现象的原因。
Fluorescence enhancement of fluorophores in neat solvent media in the presence of graphene oxide (GO) is less known. It is necessary to re-examine the role of GO from the fundamental scientific viewpoint. Herein, we have reported GO controlled conversion from the neutral to cationic form of a red emitting molecule. Besides this, the switching of the role of GO as an enhancer to a quencher of fluorescence depending on the concentration of GO in the presence of proton accepting solvent media was established. Intermolecular proton transfer from the GO surface to fluorophores is responsible for this phenomenon.