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Related Concept Videos

Cationic Chain-Growth Polymerization: Mechanism00:57

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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization
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Solid Multiresponsive Materials Based on Nitrospiropyran-Doped Ionogels.

Sara Santiago1,2, Pablo Giménez-Gómez2, Xavier Muñoz-Berbel2

  • 1Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Barcelona 08193, Spain.

ACS Applied Materials & Interfaces
|May 31, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed novel ionogel-based materials for molecular switches. These materials enable multi-responsive chromic behaviors like photo-, halo-, thermo-, and electrochromism in a single platform.

Keywords:
ionic liquidsionogelmolecular switchessmart devicessmart materialsspiropyrans

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry

Background:

  • Fabricating multistimuli-responsive chromic materials using molecular switches is challenging due to limitations of solid matrices.
  • Solid matrices often hinder chromic responses and restrict the types of stimuli applicable to molecular switches.

Purpose of the Study:

  • To overcome the limitations of solid matrices in hosting molecular switches for advanced materials.
  • To develop a versatile platform for achieving multi-stimuli-responsive chromic behaviors.

Main Methods:

  • Utilized ionogels as a soft, fluidic, and ionic-conductive environment for molecular switches.
  • Incorporated nitrospiropyran derivatives into the ionogel platform.

Main Results:

  • Nitrospiropyran-based materials in ionogels exhibited preserved solution-like properties.
  • Achieved optimal photo-, halo-, thermo-, and electrochromic switching behaviors within a single solid platform.
  • Demonstrated the efficacy of ionogels in overcoming matrix-induced constraints.

Conclusions:

  • Ionogels provide a superior environment for molecular switches, enabling enhanced chromic functionalities.
  • This strategy pioneers a single solid platform for diverse stimuli-responsive chromic materials.
  • The developed materials hold potential for advanced responsive devices.