title: [Spectra study of a sodion triethylenetetramine-bisdithiocarbamate and its complexes with heavy metal ions].
abstract: A sodion triethylenetetramine-bisdithiocarbamate (DTC-TETA) and its complexes with heavy metal ions were investigated by FTIR, UV, FAAS and elemental analysis, respectively. The FTIR spectrum of DTC-TETA showed strong absorption peaks at 1 461-1 388 cm(-1) and 1 174-996 cm(-1) which were attributed to partly double bonds of C-N and C-S, respectively. The UV spectrum of DTC-TETA had two absorption peaks at 265 and 290 nm, assigned to pi-pi* transition of N...C...S radical and nonbonding electron n-pi* transition of S...C...S radical to conjugated system, respectively. The elemental analysis results demonstrated that the mol ratio of C, H, N and S in DTC-TETA was about 2 : 4 : 1 : 1. As for UV spectrum of its complexes with Cu(II), Cd(II), Zn(II) and Ni(II), there were four new absorption peaks at 321, 310, 311 and 325 nm, respectively. Coupled to flow-injection, FAAS determination showed that the complexation performance of Cu2+, Cd2+, Ni2+ and Zn2+ complexes of DTC-TETA was better than that of sodium diethyldithiocarbamate (DDTC).
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China. liaoqq1971@yahoo.com.cn
authors.forename: Qiang-Qiang
authors.initials: QQ
authors.lastname: Liao
authors.forename: Zhong-Yuan
authors.initials: ZY
authors.lastname: Wang
authors.forename: Yi-Jiu
authors.initials: YJ
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Xiang
authors.forename: Ru-Mei
authors.initials: RM
authors.lastname: Cheng
authors.forename: Qin-Jian
authors.initials: QJ
authors.lastname: Zhang