摘要
剧烈地振荡100 ml 6≤pH≤12的5％ PVA水溶液,缓慢地添加0.08524克CuCl·2H_2O时,溶液呈绿色透明状态;若加碱至pH≥13,溶液中则析出树胶状物。以分光光度法,于740 nm波长下测定含0.98％正丁醇的0.5％PVA与铜盐组成的(pH=10)不同浓度(5～50 mg CuCl_2·2H_2O/100 ml)的水溶液吸光度,并对CuCl_2·2H_2O摩尔浓度作图,它遵守朗伯—比耳定律。以紫外及可见光谱和电子自旋共振谱等研究上述溶液中初生氢氧化铜与PVA的作用,认为6≤pH≤12的5％PVA水溶液中添加Cu^(2+)可形成管道形包合物,pH≥13条件下却生成多核氢氧化铜聚乙烯醇配位聚合物。
The solution emerged in a green transparent state, when 0.08524 grams of CuCl_2.2H_2O had been added slowly to 100ml of 5% PVA aqueous solution in 6≤ pH≤12 by violent vibration. If the base was added again to above solution until pH≥13, the resinoid substance was separated from it. These former aqueous solutions composed of the different concentration of copper salt(5～50mg CuCl_2.2H_2O/100ml) with 0.5% PVA at pH = 10 and contained 0~98% n-butyl alcohol, were observed by spectrophotometer, these absorbances of preceding solutions were measured at 740nm wave length and were plotted against the corresponding molar concentration of CuCl_2.2H_2O. It found that the curve of absorbance-molar concentration obeys the Lambert-Beer law. The copper hydroxide interacted on each other with PVA in above-mentioned solution was investigated by ultraviolet and visible spectrum and ESR etc. it is clear that a tubular inclusion substance was formed in the former solution and the coordination-polymer of multinuclear cupric hydroxide-polyvinyl alcohol was separated from the later solution.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
1990年第3期73-79,共7页
Journal of Fujian Normal University：Natural Science Edition
关键词
氢氧化铜
聚乙烯醇
配位聚合物
copper hydroxide in statu nascendi, PVA, inclusion, coordinationpolymer
