Citation: Liu Haifang, Sun Yuanqiang, Li Zhaohui, Yang Ran, Yang Jie, Aryee Aaron Albert, Zhang Xiaoge, Ge Jia, Qu Lingbo, Lin Yuehe. SciFinder-guided rational design of fluorescent carbon dots for ratiometric monitoring intracellular pH fluctuations under heat shock[J]. Chinese Chemical Letters, ;2019, 30(9): 1647-1651. doi: 10.1016/j.cclet.2019.06.012 shu

SciFinder-guided rational design of fluorescent carbon dots for ratiometric monitoring intracellular pH fluctuations under heat shock

Liu Haifang ^a,1 ,
Sun Yuanqiang ^a,1 ,
Li Zhaohui ^a,*, ,
Yang Ran ^a ,
Yang Jie ^a ,
Aryee Aaron Albert ^a ,
Zhang Xiaoge ^a,*, ,
Ge Jia ^a ,
Qu Lingbo ^a,*, ,
Lin Yuehe ^b

a.
Institute of Chemical Biology and Clinical Application at The First Affiliated Hospital, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou University, Zhengzhou 450001, China
b.
School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States

zhaohui.li@zzu.edu.cn

zhangxiaogege@126.com

qulingbo@zzu.edu.cn

Received Date: 13 May 2019
Revised Date: 5 June 2019
Accepted Date: 5 June 2019
Available Online: 6 September 2019

Figures(6)

Intracellular pH plays a significant role in various biological processes, including cell proliferation, apoptosis, metabolism, enzyme activity and homeostasis. In this work, a novel design strategy for the preparation of pH responsive carbon dots (CDs-pH) for ratiometric intracellular imaging was reported. By using SciFinder database, fluorescent CDs-pH with the required pK_a value of 6.84 were rationally designed, which is vital important for precise sensing of intracellular pH. As a result, the synthesized CDspH demonstrated robust ability to test pH fluctuations within the physiological range of 5.4-7.4. The CDspH was further utilized for fluorescent ratiometric imaging of pH in living HeLa cells, effectively avoided the influence of autofluorescence from native cellular species. Moreover, real-time monitoring of intracellular pH fluctuation under heat shock was successfully realized. This SciFinder-guided design strategy is simple and flexible, which has a great potential to be used for the development of other types of CDs for various applications.
- Carbon dots,
- Rationally design,
- SciFinder database,
- Ratiometric monitoring,
- Intracellular pH
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