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How Graphene Oxide Quenches Fluorescence of Rhodamine 6G
Kai-li Fan1, Zhen-kun Guo1, Zhi-gang Geng2, Jing Ge1, Shen-long Jiang2, Jia-hua Hu1, Qun Zhang*1,2
1.Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;2.Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
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
FundProject:
氧化石墨烯如何猝灭罗丹明6G的荧光
樊凯利1, 郭镇坤1, 耿志刚2, 葛晶1, 江申龙2, 胡嘉华1, 张群*1,2
1.中国科学技术大学化学物理系,合肥230026;2.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
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
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