摘要
在非水溶剂中合成了十二钨磷酸碱土金属盐与DMF和EtOH的加合物Ca_(3/2)(PW_(12)O_(40))·9DMF·EtOH、Sr_(3/2)(PW_(12)O_(40))·8DMF·EtOH和Ba_(3/2)(PW_(12)O_(40))·9DMF.通过元素分析和红外光谱确定了它们的组成和Keggin结构.测定了十二钨磷酸钙、十二钨磷酸锶和十二钨磷酸钡同DMF和EtOH的加合反应热.30℃下其反应热分别为—207.4士2.3、—197.1土5.4 kJ/mol和—270.9士2.4 kJ/mol.
Adducts,Ca2/3(PW12O40)·9DMF·EtOH,Sr2/3(PW12O40)·8DMF·EtOH and Ba2/3 (PW12O40)·9DMF were synthesized in non-aqueous solutions,Their compositions and Keggin structures were characterized by elemental analysis and IR spectrometry.The heats of addition reactions between calcium dodecatungstophosphate,strontium dodecatungstophosphate and barium dodecatungstophosphate with DMF and EtOH were respectively determined by solution calorimetry.The values were-207.4±2.3 kJ/mol,-197.1±5.4 kJ/mol and-270,9±2.4 kJ/mol at 30℃,respectively.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第10期1193-1196,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
十二钨磷酸盐
加合物
DMF
乙醇
Adducts of dodecatungstophosphates,Synthesis,Heats of reactions
