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Gallic acid ester activity changed with chain length and hydroxyl groups

Medicine research
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Research area:ChemistryBiochemistryFree Radicals and Antioxidants

What the study found

Gallic acid ester structure affected antioxidant behavior. Longer alkyl chains were associated with lower DPPH radical scavenging activity, while hydroxyl-substituted esters kept high activity.

Why the authors say this matters

The authors conclude that the findings suggest a way to design gallic acid esters for specific systems, because structure influences antioxidant behavior.

What the researchers tested

The researchers designed and examined 14 gallic acid ester derivatives in two groups: alkyl chain esters and hydroxyl-substituted alkyl esters. They assessed DPPH radical scavenging activity and oxidation induction time in an oil system.

What worked and what didn't

DPPH radical scavenging declined as alkyl chain length increased, from 91.9% for GA-C3 to 55.6% for GA-C30. Hydroxyl-functionalized esters GA-EG, GA-GL, and GA-PT maintained high antioxidant activity above 90%.

What to keep in mind

The abstract does not describe limitations in detail. The findings are based on the specific derivatives and test systems reported here.

Key points

  • Fourteen gallic acid ester derivatives were designed and tested.
  • Longer alkyl chains were linked to lower DPPH radical scavenging activity.
  • GA-C3 showed 91.9% DPPH scavenging, while GA-C30 showed 55.6%.
  • Hydroxyl-substituted esters GA-EG, GA-GL, and GA-PT kept antioxidant activity above 90%.
  • All derivatives extended oxidation induction time in oil, with GA-C3 giving the largest increase at 2.15 h.

Disclosure

Research title:
Gallic acid ester activity changed with chain length and hydroxyl groups
Authors:
Qi Chen, Shuaiwei Cui, Wenwen Zhang, Gang Dong, Baoshan Tang, Jinju Ma, Juan Xu, J. Zhang, Lanxiang Liu
Institutions:
Hebei Chemical and Pharmaceutical College, Research Institute of Resource Insects, Chinese Academy of Forestry, State Forestry and Grassland Administration, Southwest Forestry University, Xinyang College of Agriculture and Forestry
Publication date:
2026-01-07
DOI:
10.3390/molecules31020210
OpenAlex record:
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Image credit:
Photo by cottonbro studio on Pexels · Pexels License
AI provenance: This post was generated by OpenAI. The original authors did not write or review this post.

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