Paper
Journal of Materials Chemistry C
(m, 2H), 3.54 (q, J ¼ 7.0 Hz, 2H), 2.55 (s, 6H), 1.42 (s, 6H), 1.21 (t,
J ¼ 7.0 Hz, 3H). 13C NMR (101 MHz, CDCl3): d 159.40, 155.27,
143.18, 141.85, 131.85, 129.19, 127.25, 121.11, 115.22, 70.92,
70.74, 70.74, 69.84, 69.74, 67.53, 66.67, 15.16, 14.58. 19F NMR
(376 MHz, CDCl3): d ꢀ146.14, ꢀ146.23, ꢀ146.32, ꢀ146.41. ESI-
MS (m/z): 523.1 [M + Na]+, 501.1 [M + H]+, 481.1 [M ꢀ F]+.
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Acknowledgements
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This work was supported by the National Key Basic Research
Program of China (973 Program 2013CB834800 and
2013CB632403) and by the Ministry of Science and Technology
of China (2012DFH40090). We thank the Natural Science
Foundation of China (21273257, 21267025, 21371175 and
61274002), Beijing Natural Science Foundation (2142033), and
CAS-Croucher Funding Scheme for Joint Laboratories. D.P.S.
and Y.C. acknowledge the support of the Chinese Academy of
Sciences Visiting Fellowship for Researchers from Developing
Countries (2013FFGB0009) and 100 Talents Program,
respectively.
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