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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Crystallography

Background:

  • Developing on-demand porous lattice frameworks from simple building blocks is crucial.
  • Achieving complexity, multiplicity, and reversibility in porous architectures remains a significant challenge.

Purpose of the Study:

  • To create novel porous hydrogen-bonded organic frameworks (HOFs) using dynamic intermolecular interactions and flexible molecular conformations.
  • To explore multimode reversible structural transformations and tunable fluorescence properties.

Main Methods:

  • Utilized a cyano-modified tetraphenylethylene tecton as a building block.
  • Investigated dynamic intermolecular interactions and flexible molecular conformations.
  • Applied external stimuli to induce structural transformations and fluorescence changes.

Main Results:

  • Synthesized eleven kinetic-stable HOFs with diverse shapes and two non-porous structures.
  • Observed multimode reversible structural transformations between porous and non-porous states.
  • Demonstrated tunable fluorescence, including white-light emission, through framework flexibility and guest interactions.

Conclusions:

  • Dynamic intermolecular interactions and flexible molecular conformations are key to constructing versatile smart molecular frameworks.
  • The developed HOFs exhibit stimuli-responsive behavior and tunable fluorescence, offering potential applications in sensing and light-emitting devices.