In 2019,Polymers (Basel, Switzerland) included an article by Zhang, Shengming; Fang, Guizhen; Chen, Haitao; Lang, Qian. Recommanded Product: ABTS Diammonium. The article was titled 《The effect of degradation of soda lignin using Pd/SO42-/ZrO2 as a catalyst: improved reactivity and antioxidant activity》. The information in the text is summarized as follows:
To the value-added application of the soda lignin by improving its reactivity and antioxidant activity, a self-made Pd/SO42-/ZrO2 catalyst was used to catalyze the degradation reaction of soda lignin. The catalyst was loaded with the palladium of 1.47 weight% while retaining the super acidity of SO4 2-/ZrO2. The reaction condition was determined as follows: the dioxane-water solution was selected as the reaction solution, the addition amount of the catalyst was 5 weight% of the soda lignin, the system was heated at 100°C for 4 h under a hydrogen pressure of 3 MPa. The reactivity of the catalyzed-soda lignin compared to the soda lignin before the reaction was significantly improved: the values of phenolic hydroxyl groups and total hydroxyl groups were increased by 35.3% and 97.1%, resp., and the value of methoxy groups was decreased by 13%. Approx. 63.3% of the β-O-4 bonds were cleaved, which resulted in a reduction of the weight average mol. weight from 8200 g.mol-1 to 4900 gmol-1. At the same time, the EC50 values of the catalyzed-soda lignin on DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS+ 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonate) radicals scavenging were decreased by 20.6% and 32.6%, resp., and the reducing power of catalyzed-soda lignin at the absorption value of 0.5 was increased by 10.5%. The Pd/SO42-/ZrO2catalyst works by breaking the β-O-4 linkages and degrading the methoxy groups. The catalyzed-soda lignin exhibits the possibility of being used as the antioxidants, grafting precursors, adhesive additives, and raw materials for lignin/polymer composites. The experimental process involved the reaction of ABTS Diammonium(cas: 30931-67-0Recommanded Product: ABTS Diammonium)
ABTS Diammonium(cas: 30931-67-0) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Recommanded Product: ABTS Diammonium
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica