%0 Generic %A Xia, Jun %A Zhao, Bin %A Wang, Hong-Sheng %A Shi, Wei %A Ma, Yue %A Song, Hai-Bin %A Cheng, Peng %A Liao, Dai-Zheng %A Yan, Shi-Ping %D 2007 %T Two- and Three-Dimensional Lanthanide Complexes:  Synthesis, Crystal Structures, and Properties %U https://acs.figshare.com/articles/dataset/Two_and_Three_Dimensional_Lanthanide_Complexes_Synthesis_Crystal_Structures_and_Properties/3010339 %R 10.1021/ic061620p.s001 %2 https://acs.figshare.com/ndownloader/files/4711651 %K isostructural %K 2 D %K 3L %K acid %K 3 D frameworks %K lanthanide contraction effect %K Cc space group %K DD %K polymer %K DM %K Ln %K 2 D monolayer %K complex %X 3,5-Pyrazoledicarboxylic acid (H3L) reacts with nitrate salts of lanthanide(III) (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er) under hydrothermal conditions to form a series of lanthanide polymers 19. These nine polymers have the same crystal system of monoclinic, but they exhibit three different kinds of metal−organic framework structures. The complexes {[Ln2(HL)3(H2O)4]·2H2O}n (Ln = Pr (1), Nd (2), and Sm (3)) were isostructural and exhibited porous 3D frameworks with a Cc space group. The complexes {[Ln2(HL)3(H2O)3]·3H2O}n (Ln = Eu (4), Gd (5), and Tb (6)) were isostructural and built 2D double-decker (2DD) frameworks with a P21/c space group. The complexes {[Ln(HL)(H2L)(H2O)2]}n ((Ln = Dy (7), Ho (8), and Er (9)) were also isostructural and formed 2D monolayer (2DM) frameworks with a P21/n space group. The structure variation from the 3D porous framework to the 2D double-decker to the 2D monolayer is attributed to the lanthanide contraction effect. Notably, six new coordination modes of 3,5-pyrazoledicarboxylic acid were observed, which proved that 3,5-pyrazoledicarboxylic acid may be used as an effective bridging ligand to assemble lanthanide-based coordination polymers. The photophysical and magnetic properties have also been investigated. %I ACS Publications