Two Unexpected Temperature-Induced Supermolecular Isomers from Multi-Topic Carboxylic Acid: Hydrogen Bonding Layer or Helix Tube |
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| Authors: | Chunyang Li Chunhong Tan Juan Zhou Yan-Yong Lin Xiao-Feng Wang |
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| Institution: | 1.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; (C.L.); (C.T.);2.School of Mechanical Engineering, University of South China, Hengyang 421001, China;3.School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China |
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| Abstract: | 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 bicyclo2.2.2]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. |
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| Keywords: | tetra-carboxylic acid temperature-induced hydrogen bonding supramolecular isomeric crystal structure |
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