| 磷钨杂多酸银盐催化合成缩酮(醛) |
| Synthesis of Ketal Catalyzed with Silver Salts of Tungstophosphoric |
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| 摘要: 利用沉淀法制备了一系列磷钨杂多酸银盐(AgxH3-xPW12O40，0＜x＜3)。经XRD物相分析和d-间距组成图证明，产品为斜方晶系的完全互溶取代固溶体，结果符合Vegard定律。热分析证明，Agx的分解温度非常相似，而且银离子数越多，磷钨酸盐越稳定。以Agx为催化剂合成6种重要缩酮结果表明，催化剂的活性与结构中的酸性质子和水合银离子分离出的质子有关。催化剂Ag2H1PW12O40在合成缩酮的反应中催化活性最高。催化剂可重复使用。 |
| 关键词: 磷钨酸 银盐 缩酮 |
| 基金项目: |
| Abstract: A series of silver salts of 12-tungstophosphoric acid AgxH3-xPW12O40 (Agx) (where 0＜x＜3), were prepared. XRD and cell parameters-component figures of the series of the solid solutions powder that the compounds are mutually miscible in the solid solutions. Furthermore, DTA show that, the temperature for the Agx decomposition is very similar. The catalytic activity for the formation of ketals was also studied. It was found that the Ag2H1PW12O40 is the best catalyst in the reaction. The results showed that catalystic activity is related to acid protons and protons generated by dissociation of water molecules coordinated by silver cations. |
| Keywords: dodecatungstophosphate silver salt ketal |
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| 魏云霞,马明广,李生英,李康兰.磷钨杂多酸银盐催化合成缩酮(醛)[J].无机化学学报,2012,28(9):1909-1913. |
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