title: Preparation of 1,3,5-thiadiazine-2-thione derivatives of chitosan and their potential antioxidant activity in vitro.
abstract: Three new kinds of 1,3,5-thiadiazine-2-thione derivatives of chitosan with two different molecular weight (SATTCS1, SATTCS2, TITTCS1, TITTCS2, CITTCS1 and CITTCS2) have been prepared. Their structures were characterized by IR spectroscopy. The substitution degree of derivatives calculated by elemental analyses was 0.47, 0.42, 0.41, 0.38, 0.41 and 0.36, respectively. The result shows that substitution degree of derivatives was higher with lower molecular weight. The antioxidant activity was studied using an established system, such as hydroxyl radical scavenging, superoxide radical scavenging and reducing power. Antioxidant activity of the 1,3,5-thiadiazine-2-thione derivatives of chitosan were stronger than that of chitosans and antioxidant activity of low molecular weight derivatives were stronger than that of high molecular weight derivatives. It is a potential antioxidant in vitro.
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Ji
authors.forename: Zhimei
authors.initials: Z
authors.lastname: Zhong
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Chen
authors.forename: Ronge
authors.initials: R
authors.lastname: Xing
authors.forename: Song
authors.initials: S
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Li
mesh_terms: D000975:Antioxidants / Q000138:chemical synthesis / Q000494:pharmacology*; D048271:Chitosan / Q000737:chemistry* / Q000494:pharmacology; D066298:In Vitro Techniques; D013055:Spectrophotometry, Infrared; D013829:Thiadiazines / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D013829:Thiadiazines; D048271:Chitosan