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Active Molecular Gripper as a Macrocycle Synthesizer.

Tianyi Zheng1, Linfeng Tan1, Minhyeok Lee2

  • 1Department of Chemistry, State Key Lab of Molecular Engineering of Polymers, and Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China.

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Researchers developed a dynamic molecular gripper that acts as a macrocycle synthesizer. This active molecular gripper can grasp substrates, perform macrocyclization, and release products, enabling efficient repetitive synthesis tasks.

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Area of Science:

  • Supramolecular Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Confined spaces enhance substrate reactivity and selectivity in chemical reactions.
  • Traditional confined reaction vessels lack sensitivity to environmental changes.
  • Dynamic control over confined reaction environments is desirable for advanced synthesis.

Purpose of the Study:

  • To develop a dynamic confined space for chemical synthesis.
  • To create an active molecular gripper capable of substrate grasping, macrocyclization, and product release.
  • To demonstrate a self-assembling macrocycle synthesizer with environmental responsiveness.

Main Methods:

  • Design and synthesis of an amphiphilic host with branched aromatic arms acting as a molecular gripper.
  • Utilizing substrate grasping by the molecular gripper to form a confined reaction space.
  • Stabilization of the confined space through gel formation.
  • Triggering macrocyclization via spontaneous ring-forming reactions upon substrate confinement.
  • Demonstrating product release and gripper re-opening for repetitive synthesis.

Main Results:

  • A dynamic confined space was successfully formed by substrate grasping of the molecular gripper.
  • The confined space facilitated a spontaneous ring-forming reaction, leading to macrocycle synthesis.
  • The molecular gripper demonstrated substrate grasping, macrocyclization, and product release capabilities.
  • The system exhibited efficient repetitive synthesis through consecutive open-closed switching.
  • The gel formation enhanced the stability of the confined reaction environment.

Conclusions:

  • A novel molecular gripper functions as an active macrocycle synthesizer by creating a dynamic confined space.
  • The system offers a new approach to controlled macrocyclization with potential for environmental responsiveness.
  • The demonstrated working efficiency through repetitive tasks highlights the utility of dynamic confined reaction systems.