Funding for this research was provided by:
Dalian Institute of Chemical Physics (DICP DMTO201601)
Text and Data Mining valid from 2019-04-02
Received: 21 October 2018
Accepted: 28 March 2019
First Online: 2 April 2019
Compliance with Ethical Standards
: The authors declare no competing financial interest.
: The supplementary material contains additional figures and tables, and the structure coordinates of HZ1 to HZ4 and SMS1 to SMS4.