Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (7): 966-975.DOI: 10.19894/j.issn.1000-0518.230394

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Synthesis of Side Chain Derived Quaternary Ammonium N-Chloramines for Antibacterial Applications

Ling-Dong LI1,2(), Song-Wei ZHANG2, Wei-Lun ZHANG2, Peng-Fei LIU2, Jiang-Jiming YU2, Hao ZHOU2   

  1. 1.State Key Laboratory of Fine Chemicals,Dalian University of Technology,Panjin 124221,China
    2.School of Chemical Engineering,Life and Ocean Science,Dalian University of Technology,Panjin 124221,China
  • Received:2023-12-19 Accepted:2024-05-15 Published:2024-07-01 Online:2024-08-03
  • Contact: Ling-Dong LI
  • About author:lild@dlut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(41977197)

Abstract:

A series of side-chain derived quaternary ammonium (QA) N-chloramines (10-14) were designed and synthesized using commercial 5,5-dimethylhydantoin (DMH) as raw matesial, and the structures of precursors and corresponding N-chloramines were characterized. The antibacterial activity of chloramines 10-14 was preliminarily tested using Escherichia coliE.coli) and Staphylococcus aureusS.aureus) as model strains, and N-chloramine 1 as control. The results showed that antibacterial ability of 10-13 increased and then declined with the length of side chain increased. Namely, tributyl QA N-chloramine 12 with KL of 1.07±0.09 and 6.49 against S.aureus and E.coli, exhibited relatively higher antibacterial efficacy, possibly due to the preferable hydrophilic-lipophilic characteristic required for efficient contact killing. Furthermore, hydroxyethyl counterpart 14 achieved total killing of S.aureus and E.coli, demonstrating the towering antibacterial capability among N-chloramines 10-14, which may be attributed to its facile transportation across bacterial cell membrane. The series of efficacious N-chloramine disinfectants prepared in this work provide reference for the development of more efficient ionic N-chloramine antibacterial agents.

Key words: Quaternary ammonium N-chloramine, Multi-step chemical synthesis, Antibacterial ability, Hydrophilic-lipophilic balance, Side chain derivative

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