Makale detayı · 2010
Mechanism of Photolytic Decomposition of N Halamine Antimicrobial Siloxane Coatings
Dergi
ACS Applied Materials & InterfacesISSN 1944-8244
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- Yıl
- 2010
- Tür
- article
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- YÖKSİS dergi adı ACS Applied Materials & Interfaces
- Katalog eşleşmesi (ISSN) ACS Applied Materials and Interfaces
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Özet
OpenAlex · İngilizce
Generally, antimicrobial N-halamine siloxane coatings can be rehalogenated repetitively upon loss of their biocidal efficacies, a marked advantage over coatings containing other antimicrobial materials. However, the N-halamine materials tend to slowly decompose upon exposure to ultraviolet irradiation as in direct sunlight. In this work the mechanism of photolytic decomposition for the N-halamine siloxanes has been studied using spectroscopic and theoretical methods. It was found that the N-chlorinated coatings slowly decomposed upon UVA irradiation, whereas the unhalogenated coatings did not. Model compound evidence in this work suggests that upon UVA irradiation, the N-Cl bond dissociates homolytically, followed by a Cl radical migration to the alkyl side chain connected to the siloxane tethering group. An alpha and/or beta scission then occurs causing partial loss of the biocidal moiety from the surface of the coated material, thus precluding complete rechlorination. NMR, FTIR, GCMS, and computations at the DFT (U)B3LYP/6-311++G(2d,p) level of theory have been employed in reaching this conclusion.
Konular
Atıflar
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85 atıf
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Yerel katalogda bu makaleye atıf yapan 8 yayın (OpenAlex referans eşleşmesi; tam dünya listesi değildir).
- N Halamine Biocidal Coatings via a Layer by Layer Assembly Technique 2011
- Polymeric Antimicrobial N Halamine Epoxides 2011
- A novel N halamine acrylamide monomer and its copolymers for antimicrobial coatings 2011
- N halamine copolymers for biocidal coatings 2012
- Multifunctional cotton fabric Antimicrobial and durable press 2012
- Antimicrobial functionalization of poly ethylene terephthalate fabrics with waterborne N halamine epoxides 2016
- Residual disinfection with N halamine based antimicrobial paints 2011
- Inter and Intramolecular Mechanisms for Chlorine Rearrangements in Trimethyl Substituted N Chlorohydantoins 2012