title: Different hydroxyl radical scavenging activity of water-soluble beta-alanine C60 adducts.
abstract: Three C(60) derivatives [C(60) (NHCH(2)CH(2)COONa)(n)(H)(n)], n=1, 5, 9] (A, B, C) with different additional number of beta-alanine were synthesized by the control of relative amount of C(60) and beta-alanine added. Hydroxyl radical scavenging activity of the adducts was evaluated in a copper-catalyzed Haber-Weiss reaction by chemiluminescence technology. The 50% inhibition concentrations (IC(50)'s) of A, B, and C were 147.2 micromol/L, 76.3 micromol/L, and 96.2 micromol/L, respectively. The difference should be closely related to the numbers of residual C=C bonds in C(60), steric effect and electron-withstanding effect of amino group especially.
authors.affiliation: College of Food Science, Shanghai Fisheries University, Shanghai 200090, China. taosum@shfu.edu.cn
authors.forename: Tao
authors.initials: T
authors.lastname: Sun
authors.forename: Zhishen
authors.initials: Z
authors.lastname: Jia
authors.forename: Zhude
authors.initials: Z
authors.lastname: Xu
mesh_terms: D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers / Q000378:metabolism*; D017665:Hydroxyl Radical / Q000378:metabolism*; D012995:Solubility; D014867:Water / Q000378:metabolism*; D015091:beta-Alanine / Q000737:chemistry / Q000378:metabolism*
chemical_list: D016166:Free Radical Scavengers; D014867:Water; D015091:beta-Alanine; D017665:Hydroxyl Radical