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Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications
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Hydrogels Based on Schiff Base Linkages for Biomedical Applications.

Junpeng Xu1, Yi Liu1, Shan-Hui Hsu2,3

  • 1Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan.

Molecules (Basel, Switzerland)
|August 22, 2019
PubMed
Summary

Schiff base chemistry enables the creation of self-healing hydrogels that can repair themselves. These adaptable materials are pH-sensitive and useful for various biomedical applications.

Keywords:
Schiff baseclick chemistrydynamic covalent bondhydrogelself-healingtissue engineering

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Schiff base reactions are key in click chemistry.
  • These reactions are crucial for developing self-healing hydrogels.
  • Schiff bases offer reversible reactions under mild conditions, enabling self-healing properties in hydrogels.
  • The pH-sensitivity of Schiff bases allows hydrogels to respond to biological stimuli.
  • Diverse Schiff base types enable tunable mechanical properties and chemical stability in hydrogels.

Purpose of the Study:

  • To review the design and preparation of hydrogels utilizing Schiff base linkages.
  • To explore the biomedical applications of these Schiff base-based hydrogels.

Main Methods:

  • Summarizing existing research on Schiff base hydrogel synthesis.
  • Compiling information on the properties and applications of these hydrogels.

Main Results:

  • Schiff base chemistry provides a versatile platform for creating self-healing hydrogels.
  • The reversible nature of Schiff base reactions is central to the self-healing mechanism.
  • Hydrogels exhibit tunable properties and responsiveness to pH.
  • A wide range of biomedical applications are enabled by these advanced materials.

Conclusions:

  • Schiff base hydrogels represent a significant advancement in self-healing materials.
  • Their tunable properties and biocompatibility make them highly promising for diverse biomedical uses.
  • Further research into Schiff base hydrogels will likely expand their therapeutic potential.