Funding for this research was provided by:
Natural Science Foundation of Jiangsu Province (BK20141304)
National Natural Science Foundation of China (21276116, 21477050, 21301076, 21303074, 21522603,2)
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: The Royal Society of Chemistry has an exclusive publication licence for this journal
PUBLICATION HISTORY
: Received 27 November 2016; Accepted 5 January 2017; Accepted Manuscript published 5 January 2017; Advance Article published 20 January 2017; Version of Record published 6 February 2017