Keggin型有机膦钨杂多酸的制备、 结构表征和酸量的电位滴定法测定

西南师范大学学报(自然科学版)

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Keggin型有机膦钨杂多酸的制备、结构表征和酸量的电位滴定法测定

Keggin型有机膦钨杂多酸的制备、结构表征和酸量的电位滴定法测定[J]. 西南师范大学学报(自然科学版), 2001, 26(2).

引用本文:

Keggin型有机膦钨杂多酸的制备、结构表征和酸量的电位滴定法测定[J]. 西南师范大学学报(自然科学版), 2001, 26(2).

Preparation Characterization and Acid Number Measurement by the Potentiometric Titration Method for the Keggin Type Organo-phosphorus-heteropolytungstic Acids[J]. Journal of Southwest China Normal University(Natural Science Edition), 2001, 26(2).

Citation:

Preparation Characterization and Acid Number Measurement by the Potentiometric Titration Method for the Keggin Type Organo-phosphorus-heteropolytungstic Acids[J]. Journal of Southwest China Normal University(Natural Science Edition), 2001, 26(2).

Keggin型有机膦钨杂多酸的制备、结构表征和酸量的电位滴定法测定

Preparation Characterization and Acid Number Measurement by the Potentiometric Titration Method for the Keggin Type Organo-phosphorus-heteropolytungstic Acids

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R2R1N+CH2CH2PO3H -*W12O36*nH2O(RR1H;RCH3,R1H;RH,R1 n-C4H9;RH ,R1i-C3H7; 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,着重讨论了取代基对它们在水溶液中酸量的影响.
- 2-氨乙基膦酸 /
- N-取代物 /
- 有机膦钨杂多酸 /
- Keggin结构 /
- 酸量 /
- 电位滴定
Abstract: The organo-phosphorus-heteropolytungstic acids with 2 -amminoethylphosphonic acids and its N-substituded derivatives as the coordina te center were synthesized and characterized by IR, weight analysis ，scanning e lectron microscope and enegy-dispersive X-ray analysis,elemental analysis, for the first time. The results show that the five of organo-phosphorus-heteropol ytungstic acids possess Keggin type structure. Their general formula is R2R 1N+CH2CH2PO3H-*W12O36*nH2O(R R1H;RCH3, R1H; RH,R1n-C4H9;RH,R1i-C3H7;RR1CH3). Th eir acid number in the aqueous solution was measured by the potentiometric titration meth od. Especially,the effect of the N-substituents on the acid number of the organ o-phosphorus-heteropolytungstic acids in the water was also studied and discus sed.
- 2-amminoethylphosphonic acid；N-substituted derivati v es； organo-phosphorus-heteropolytungstic acid； Keggin type structure； acid number； potentiometric titration /

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Keggin型有机膦钨杂多酸的制备、结构表征和酸量的电位滴定法测定

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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R2R1N+CH2CH2PO3H -*W12O36*nH2O(RR1H;RCH3,R1H;RH,R1 n-C4H9;RH ,R1i-C3H7; 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,着重讨论了取代基对它们在水溶液中酸量的影响.