Yanli Ge, Xiaocheng Weng, Tian Tian, Fei Ding, Rong Huang, Libo Yuan, Jun Wu, Tianlu Wang, Pu Guoa and Xiang Zhou*, A Mitochondria-Targeted Zinc (II) Phthalocyanine for Photodynamic Therapy. RSC Adv., 2013,3, 12839- 12846