Two Unexpected Temperature-Induced Supermolecular Isomers from Multi-Topic Carboxylic Acid: Hydrogen Bonding Layer or Helix Tube
Chunyang Li,
Chunhong Tan,
Juan Zhou,
Yan-Yong Lin,
Xiao-Feng Wang
Affiliations
Chunyang Li
School of Chemistry and Chemical Engineering and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China
Chunhong Tan
School of Chemistry and Chemical Engineering and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China
Juan Zhou
School of Chemistry and Chemical Engineering and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China
Yan-Yong Lin
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
Xiao-Feng Wang
School of Chemistry and Chemical Engineering and Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China
Under ambient conditions or 160 °C, two supramolecular isomers, namely [(H4PTTA)(H2O)2(DMF)] and [(H4PTTA)(H2O)3]··Guest (1-L and 1-H, H4PTTA = N-phenyl-N′-phenyl bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxdiimide tetra-carboxylic acid, Guest = DMF and H2O), were obtained through the reaction of H4PTTA in a mixture of H2O and dimethylformamide. The single crystal structures reveal the temperature-dependent supramolecular isomerism derived from the torsion of semi-rigid of H4PTTA. The 1-L prepared at room temperature is a hydrogen bond based achiral layer, while the hydrothermal synthesized 1-H is isomer resulted in an H-bond-based chiral tubes-packed supramolecular framework.
