摘要
以聚醋酸乙烯酯(PVAc)为配体,与CoCl_2、NiCl_2、FeCl_3在四氢呋喃中进行配位反应,生成PVAc-Co(Ⅱ)、PVAc-Ni(Ⅱ)和PVAc-Fe(Ⅲ)配合物。合成反应在室温下进行,反应时间以1 h为宜。用电导率法得出PVAc-Co(Ⅱ)、PVAc-Ni(Ⅱ)配合物中金属离子与PVAc链节单元[—CH_2—CH(OCOCH_3)—]的摩尔比为1:4,而在PVAc-Fe(Ⅲ)中摩尔比可能有1:3至1:6多种。IR和PVAc-Fe(Ⅲ)配合物的XPS测试结果表明,PVAc的CH_3COO中羰基氧提供孤对电子与金属离子形成配位键。TG-DTA分析表明,形成配合物后,PVAc的高分子链的热稳定性增加。推测了产物的可能结构。
Three polyvinyl acetate(PVAc) complexes with Fe(Ⅲ), Co(Ⅱ) and Ni(Ⅱ) have been synthesized by the reaction of polyvinyl acetate, respectively, with CoCl_2, NiCl_2 and FeCl_3 in THF at room tempre- ture and one hour was appropriate for reaction. The mole ratio of metal ion to [--CH_2--CH(OCOCH_3)--] segment as found by conductivity measurement was 1:4 in complexes PVAc-Co(Ⅱ) and PVAc-Ni(Ⅱ), but it was 1:3 to 1:6 and more in complex PVAc-Fe(Ⅲ). IR spectra and XPS showed the complex PVAc-Fe( Ⅲ ) is formed by non-paired electrons from oxygen atom of CH_3COO group in PVAc with metal ions. TG-DTA revealed the heat stability of complexes was higher than that of PVAc. The proposed structures of the complexes were given.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第4期352-356,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(20271001)
安徽省自然科学基金(00047419)
