Synthesis and biological activity of triorganogermanium substituted heteropolytungstates
作者:Jianxin Li、Fengying Zhai、Xiaohong Wang、Enmin Li、Shengdong Zhang、Quanliang Zhang、Xiguang Du
DOI:10.1016/j.poly.2007.12.024
日期:2008.3
Four new compounds, [Me4N](4)H-5[(RGe)(3)(XW9O34-n)(2)] (R = HOOCCH2CH2, HOOCCH2(m-NO2C6H4)CH, X = P, n = 0; X = Sb, n = 1) have been prepared from trichlorogermanium precursors and lacunary polyoxometallates ([PW9O34](9-) and [SbW9O33](9-)). The products were characterized by means of elemental analysis, IR spectroscopy, H-1 NMR and W-183 NMR spectroscopy. W-183 NMR spectra of the complexes support the stoichiometry of the new heteropolyanions and the probable retention of the XW9 units in water. The organogermanium substituted complexes showed promising activity against two human tumor cell lines (leucocythemia Hela cells and S180 cells) in vitro and [Me4N](4)H-5[(HOOCCH2CH2Ge)(3)(SbW9O33)(2)] exhibited some certain antitumoral activity in vivo and can increase the immune ability of the spleen. (C) 2008 Published by Elsevier Ltd.