摘要
首次以 2 氨乙基膦酸及其N 取代物为配位中心 ,制得一系列有机膦钨杂多酸 .由IR光谱、重量分析、扫描电镜能谱分析和C ,H ,N元素分析相结合确定该系列杂多酸一级结构均为Keggin结构 ,通式为R2 R1N+CH2 CH2 PO3 H-·W12 O3 6·nH2 O (RR1H ;RCH3 ,R1H ;RH ,R1n C4 H9;RH ,R1i C3 H7;RR1CH3 ) .用电位滴定法测定了这些有机膦钨杂多酸在水溶液中的酸量 。
The organo phosphorus heteropolytungstic acids with 2 amminoethylphosphonic acids and its N substituded derivatives as the coordinate center were synthesized and characterized by IR, weight analysis ,scanning electron microscope and enegy dispersive X ray analysis,elemental analysis, for the first time. The results show that the five of organo phosphorus heteropolytungstic acids possess Keggin type structure. Their general formula is R 2R 1N +CH 2CH 2PO 3H -·W 12 O 36 · n H 2O( R R 1 H;R CH 3 , R 1 H; RH, R 1 n C 4H 9;RH, R 1 i C 3H 7;R R 1 CH 3 ). Their acid number in the aqueous solution was measured by the potentiometric titration method. Especially,the effect of the N substituents on the acid number of the organo phosphorus heteropolytungstic acids in the water was also studied and discussed.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第2期179-182,共4页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
2-氨乙基膦酸
N-取代物
有机膦钨多酸
KEGGIN结构
酸量
电位滴定法
催化剂
结构表征
amminoethylphosphonic acid
N substituted derivatives
organo phosphorus heteropolytungstic acid
Keggin type structure
acid number
potentiometric titration
