. 2017 Jun 19;8(9):5953–5961. doi: 10.1039/c7sc02073b
This journal is © The Royal Society of Chemistry 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Scheme 1. The synthetic procedures for Ni-1, Ni-2, Ni-3 and Ni-4.
