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氧化石墨烯如何猝灭罗丹明6G的荧光
樊凯利,郭镇坤,耿志刚,葛晶,江申龙,胡嘉华,张群*
作者单位E-mail
樊凯利 中国科学技术大学化学物理系合肥230026  
郭镇坤 中国科学技术大学化学物理系合肥230026  
耿志刚 中国科学技术大学合肥微尺度物质科学国家实验室合肥230026  
葛晶 中国科学技术大学化学物理系合肥230026  
江申龙 中国科学技术大学合肥微尺度物质科学国家实验室合肥230026  
胡嘉华 中国科学技术大学化学物理系合肥230026  
张群* 中国科学技术大学化学物理系合肥230026中国科学技术大学合肥微尺度物质科学国家实验室合肥230026 qunzh@ustc.edu.cn 
摘要:
考察了水相溶液中氧化石墨烯对罗丹明6G的高效荧光猝灭.借助稳态及时间分辨荧光光谱测量,结合对该二元体系线性吸收谱变化的细致分析,澄清了相关荧光猝灭机理,即动态猝灭与静态猝灭的联合猝灭机制.提出在静态猝灭过程中罗丹明6G与氧化石墨烯所形成的可能的基态复合物,并进一步讨论了二者之间的光致电子转移过程.
关键词:  氧化石墨烯,罗丹明6G,荧光猝灭,相互作用,机理
DOI:10.1063/1674-0068/26/03/252-258
分类号:
基金项目:
How Graphene Oxide Quenches Fluorescence of Rhodamine 6G
Kai-li Fan,Zhen-kun Guo,Zhi-gang Geng,Jing Ge,Shen-long Jiang,Jia-hua Hu,Qun Zhang*
Abstract:
We investigate the fluorescence quenching of Rhodamine 6G (R6G), a well known laser dye with a high fluorescence quantum yield, by as-synthesized graphene oxide (GO) in aqueous solution, which is found to be rather efficient. By means of steady-state and time-resolved fluorescence spectroscopy combined with detailed analysis about the linear absorption variation for this R6G-GO system, the pertinent quenching mechanism has been elucidated to be a combination of dynamic and static quenching. Possible ground-state complexes between R6G and GO during the static quenching have also been suggested. Furthermore, the direction of photoinduced electron transfer between R6G and GO has been discussed.
Key words:  Graphene oxide, Rhodamine 6G, Fluorescence quenching, Interaction, Mechanism