A novel [4 + 3] interpenetrated net containing 7-fold interlocking pseudo-helical chains and exceptional catenane-like motifs. Issue 6 (6th January 2015)

• Record Type: Journal Article
• Authors: Song, Bai-Qiao; Qin, Chao; Zhang, Yu-Teng; An, Li-Tao; Shao, Kui-Zhan; Su, Zhong-Min
• Is Part Of: Dalton transactions. Volume 44:Issue 6(2015)
• Page Start: 2844
• Page End: 2851
• Publication Date: 2015-01-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c4dt02808b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The first example of a [4 + 3] 7-fold interpenetrating network was prepared, showing 7-fold interlocking pseudo-helical chains and a unique catenane-like motif with Hopf links. Abstract : A novel interpenetrating metal–organic framework, namely [Zn3 L2 (oba)3 (H2 O)2 ]·4H2 O (1 ), has been synthesized under hydrothermal conditions. Its structure was determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR, and thermogravimetric (TG) analysis. In the structure of1, the rigid and flexible V-shaped ligands link Zn(ii ) to form a 3D structure where two types of helices and four types of pseudo-helical chains containing three pairs of enantiomers and two pairs of conformational isomers have been characterized. One such 3D framework incorporates six identical networks to form a 7-fold interpenetrated 3D framework. From the topological analysis, the Zn(ii ) ions act as three- and four-connected nodes, and oba as well asL are linkers. The framework of compound1 can be classified as a new (6 3 )2 (6 5 ·8) topology, which is a novel (3, 3, 4)-connected [4 + 3] 7-fold interpenetrating net showing 7-fold interlocking pseudo-helical chains and a unique catenane-like motif with Hopf links. In addition, the luminescence properties of the compound are discussed.