Ancillary ligand-assisted assembly of C3-symmetric 4,4′,4″-nitrilotribenzoic acid with divalent Zn2+ ions: Syntheses, topological structures, and photoluminescence properties - Cui, Li-Ting; Niu, Yan-Fei; Han, Jie; Zhao, Xiao-Li (Journal of solid state chemistry, 2015)