Two Unexpected Temperature-Induced Supermolecular Isomers from Multi-Topic Carboxylic Acid: Hydrogen Bonding Layer or Helix Tube
Under ambient conditions or 160 °C, two supramolecular isomers, namely [(H<sub>4</sub>PTTA)(H<sub>2</sub>O)<sub>2</sub>(DMF)] and [(H<sub>4</sub>PTTA)(H<sub>2</sub>O)<sub>3</sub>]··Guest (<b>1-L</b> and <b>1-H&...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/a1ff8b170f4f492e8b248a7d91b0031d |
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| Sumario: | Under ambient conditions or 160 °C, two supramolecular isomers, namely [(H<sub>4</sub>PTTA)(H<sub>2</sub>O)<sub>2</sub>(DMF)] and [(H<sub>4</sub>PTTA)(H<sub>2</sub>O)<sub>3</sub>]··Guest (<b>1-L</b> and <b>1-H</b>, H<sub>4</sub>PTTA = <i>N</i>-phenyl-<i>N</i>′-phenyl bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxdiimide tetra-carboxylic acid, Guest = DMF and H<sub>2</sub>O), were obtained through the reaction of H<sub>4</sub>PTTA in a mixture of H<sub>2</sub>O and dimethylformamide. The single crystal structures reveal the temperature-dependent supramolecular isomerism derived from the torsion of semi-rigid of H<sub>4</sub>PTTA. The <b>1-L</b> prepared at room temperature is a hydrogen bond based achiral layer, while the hydrothermal synthesized <b>1-H</b> is isomer resulted in an H-bond-based chiral tubes-packed supramolecular framework. |
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