| 钌取代的钨锗和钨硼杂多化合物的合成与表征(英文) | |
| SYNTHESIS AND CHARACTERIZATION OF THE GERMANIUM AND BORON-CENTERED POLYTUNGSTORUTHENATE | |
| 摘要: 本文合成了Keggin结构的［GeW11O39(Ru·OH2)］5-和［BW11O39(Ru·OH2)］6-杂多阴离子的四丁基铵盐。通过紫外-可见、红外光谱、核磁共振、顺磁共振和循环伏安法对上述化合物进行了表征。结果表明Ru(Ⅲ)处于一个八面体弱场中，Ru(Ⅲ)的顺磁性和核四级矩对 183W的化学位移和强度有明显的影响，其电化学还原与W(Ⅳ→Ⅴ)相关。Ru(Ⅲ)填充了缺位杂多阴离子的空位，但仍然保持Keggin结构。 | |
| 关键词: 钌 取代型杂多钨酸盐 183W核磁共振 | |
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| Abstract: The syntheses and characterization of organic solvent soluble new tetra-n-butylammonium salts of ［GeW11O39(Ru·OH2)］5- and ［BW11O39(Ru·OH2)］6- are reported. UV-Vis and IR spectra confirm that the ruthenium cation has occupied the lacuna site of the precursor polyoxoanions, and the structure of these substituted derivatives maintains the Keggin type. The sensitive changes in 183W NMR, which caused by the paramagnetism and nuclear quadrupolar moment of ruthenium, are discussed in detail. The octahedral weak field coordination of the ruthenium cation, as indicated by EPR, is consistent with the data from UV-vis spectra. The substituted polyanions display two reversible one-electron redox waves in acetonitrile, which are ascribed to the W(Ⅳ→Ⅴ) process of tungsten-oxo framework. | |
| Keywords: ruthenium substituted heteropolytungstate 183W NMR | |
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| 刘惠章,孙文梁,岳斌,李明星,陈治江,金松林,谢高阳,邵倩芬,吴泰琉,陈士明,严小敏.钌取代的钨锗和钨硼杂多化合物的合成与表征(英文)[J].无机化学学报,1997,13(3):251-257. | |
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