10.1021/cg901066v.s002 Yong-Tao Wang Yong-Tao Wang Gui-Mei Tang Gui-Mei Tang Yong-Qin Wei Yong-Qin Wei Ting-Xiao Qin Ting-Xiao Qin Tian-Duo Li Tian-Duo Li Chao He Chao He Ji-Bei Ling Ji-Bei Ling Xi-Fa Long Xi-Fa Long Seik Weng Ng Seik Weng Ng Two New Nonlinear Optical and Ferroelectric Three-Dimensional Metal−Organic Frameworks with an sqp-net American Chemical Society 2010 exhibit polymer isostructural noncentrosymmetric acentric generation response Framework display complex solvothermally Br New Nonlinear Optical induction unsymmetric ligand anion Cl cadmium salts nod arrangement Ferroelectric cadmium ions act 2010-01-06 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Two_New_Nonlinear_Optical_and_Ferroelectric_Three_Dimensional_Metal_Organic_Frameworks_with_an_sqp_net/2801842 Two novel three-dimensional metal-coordination polymers [Cd<sub>2</sub>(<b>L</b>)<sub>4</sub>(μ<sub>2</sub>-X)(X)(H<sub>2</sub>O)]<sub><i>n</i></sub> [X = Cl (<b>1</b>) and Br (<b>2</b>)] have been solvothermally synthesized by the self-assembly of an unsymmetric bridging ligand, [<b>L</b> = 2-(1<i>H</i>-imidazol-1-ylmethyl)-1<i>H</i>-benzoimidazole], and cadmium salts with different anions, respectively. The two complexes are isostructural and exhibit an acentric sqp-net, in which the cadmium ions act as unusual five-connected nodes. The induction of the flexible and unsymmetric ligand leads them to crystallize in a noncentrosymmetric polar packing arrangement, which displays a second harmonic generation response and ferroelectric behaviors.