Study on novel structure of tris-(4,4′-dimethyl-2,2′-dipyridyl) Nickel salicylic acid boric acid, Ni(C12H12N2)3●(C7H5O3)2●(H3BO3)Xiaoyan Ren, Haixing Liu and Yanfang HuoE3S Web Conf., 252 (2021) 02069DOI: https://doi.org/10.1051/e3sconf/202125202069