Citation: Lin, Jiao-Min; Qiu, Yan-Xuan; Chen, Wen-Bin; Yang, Meng; Zhou, Ai-Ju; Dong, Wen; Tian, Chang-En (2012). Unusual \p−--\p− stacking interactions between 5,5′-azotetrazolate(AT) anions in six AT based 3d metal photochromic complexes. CrystEngComm, 14, pp. 2779-.