The abilities of scavenging O2-and · OH of crude extract,the portion extracted by n-butanol and the aqueous portion remained of bamboo leaves were studied by chemiluminescence.The results showed that all of the three extracts had strong antioxidant activity.Crude extract was higher than the portion extracted by n-butanol.The antioxidant effective positions of the aqueous portion were further tested qualitatively and found to be probably tannin and δ-OH-Lys etc.From the above,we can draw the following conclusion:the extract of bamboo leaves was a complex and synergistic mixture.It was no effective on antioxidant activity to purify further.
A new mononuclear CuⅡ complex of DACO [Cu(DACO)2(SCN)]·(SCN)·2H2O ( 1) was prepared by introducing a co-ligand SCN-anion. The crystal structure of 1 was determined by X-ray diffraction analysis. The crystallographic data are: m onoclinic, P21/n, a=0.728 5(4) nm, b=2.479 0(15) nm, c=1.069 7(6) nm, The CuⅡ atom takes the square-pyramidal coordinatio n geometry. The SCN-anions adopt both monodentate coordination and uncoordinate d forms in the crystal. The coordinated cation, SCN-counter anion and the latti ce water molecules are further linked through hydrogen bonds to form a one-dimen sional chain motif. The spectral and thermal properties of 1 were studied. CCDC: 243104.
