42. Nai-Wei Wu, Li-Jun Chen, Chao Wang, Yuan-Yuan Ren, Xiaopeng Li, Lin Xu,* Hai-Bo Yang.* Hierarchical self-assembly of discrete hexagonal metallacycle into the ordered nanofibers and stimuli-responsive supramolecular gels. Chem. Commun., 2014, 50, 4231–4233.