Hydrothermal synthesis, crystal structure and properties of two new coordination polymers structured by two mixed ligands and strict quadrangular {Ln3}8 Units (Ln=Er and Ho)

• Published in: Inorganic chemistry communications Vol. 21; pp. 182 - 185
• Main Authors: Chen, Lei, Huang, Lian, Zhang, Deng, Yan, Dawei, Wang, Congling, Qin, Tao, Zhu, Dunru, Xu, Yan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2012
• Subjects: Crystal structure; Hydrothermal synthesis; Ln–O clusters; Mixed ligands; Ln–O clusters; Mixed ligands; Hydrothermal synthesis; Crystal structure
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2012.05.010

Two new three-dimensional coordination compounds formulated as [Ln3(IN)2(bdc)3.5(H2O)3]·0.5H2O (Ln=Er 1, Ho 2), where HIN=isonicotinic acid and H2bdc=1,4-benzenedicarboxylic, have been obtained by hydrothermal assemble of Ln2O3 (Ln=Er 1, Ho 2), HIN and H2bdc. Structural analysis shows that Ln3+ ions are connected by both ligands IN− and bdc2− in 1 and 2. IN− links two adjacent {Ln3} units along b axis, while bdc2− connects eight {Ln3} units along different directions, which leads to an interesting strict {Ln3}8 quadrangular in 3D open frameworks of 1 and 2. Both of the 3D open frameworks are constructed by {Ln3}12 SBUs linked by two adjacent quadrangular {Er3}8 units. Both of them feature a continuous array of face-to-face π interactions along α axis. [Display omitted] ► Compounds 1 and 2 have been hydrothermally assembled by HIN and H2bdc. ► They exhibit the first strict quadrangular {Ln3}8 structural building unit. ► Both of them feature a continuous array of face-to-face π interactions along a axis.