Increasing the antioxidant capability via the synergistic effect of coupling diphenylamine with sterically hindered phenol

Abstract

Increasing the antioxidant capability via the synergistic effect of coupling diphenylamine with sterically hindered phenol. Tetrahedron, 75 (51). 130759.

A New Antioxidant with Higher Activity at Elevated Temperature Based on Multiple Intramolecular Synergisms

“…Hayes's group also reported that the diphenylamine-phenol antioxidant 1 with an ethyl spacer between the diphenylamine and carboxylic acid showed an impressive oxidation induction time compared with the blend of Irganox L135 and Irganox L57. [22] Moreover, the intramolecular synergism between primary antioxidants and secondary antioxidants were also investigated. For example, Lee Hwei Voon's group synthesized several multipotent antioxidants (MPAOs) 2 which are semicarbazides and thiosemicarbazides bearing thiolated butylated hydroxytoluene (BHT).…”

“…The better performance than the physical blend of two single antioxidants proved the intramolecular synergism between the phenol and diphenylamine. Hayes's group also reported that the diphenylamine‐phenol antioxidant 1 with an ethyl spacer between the diphenylamine and carboxylic acid showed an impressive oxidation induction time compared with the blend of Irganox L135 and Irganox L57 [22] . Moreover, the intramolecular synergism between primary antioxidants and secondary antioxidants were also investigated.…”

Synthesis and antioxidant properties of a novel arylamine antioxidant

“…Hindered phenol and amine‐type antioxidants are the most typical representatives of primary antioxidants being extensively used in modern industry 23–25 . However, hindered phenol antioxidants show very poor antioxidant ability at evaluated temperature, which is a significant disadvantage of this type of antioxidants and greatly limits their more application in modern lubricant system 26,27 . Hence, amine‐type antioxidants have always been the research focus at present.…”

Semicarbazide and thiosemicarbazide containing butylated hydroxytoluene moiety: new potential antioxidant additives for synthetic lubricating oil

“…Since multifunctional antioxidants can possess several antioxidant functional groups in their structure, which can provide auto-synergistic antioxidant system by exhibiting radical scavenging and peroxide decomposing properties. 12,14,15 So, we envisioned to assemble several antioxidant functions in one structure by incorporating BHT moiety into semicarbazide and thiosemicarbazide compounds to obtain better antioxidant auto-synergistic effect. This article deals with the preparation and evaluation of new series of semicarbazide and its corresponding thiosemicarbazide derivatives bearing BHT moiety for their antioxidant activities using DPPH assays and DSC.…”