| Y-型沸石上VO(H2O)42+的ESR波谱研究 |
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| 引用本文： | 徐元植,王立.Y-型沸石上VO(H2O)42+的ESR波谱研究[J].波谱学杂志,1987,4(4):289-296. |
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| 作者姓名： | 徐元植 王立 |
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| 作者单位： | 浙江大学化学系 |
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| 摘 要： | 本文报道了VO2+在Y型沸石上用不同温度灼烧处理之后测得的两种不同的ESR波谱。提出了VO(H2O)42+离子在沸石笼中的两种可能结构,随着灼烧温度的升高,结构(Ⅰ)减少。到灼烧温度高于600。C时则结构(Ⅰ)完全消失,而对应于结构(Ⅱ)的A⊥也渐渐变小,说明未偶电子离域性增大以致失去电子,V4+则被氧化成V5+。本文利用波谱参数计算了键参数和约化能级。
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| 关 键 词： | 分子筛 顺磁 氧钒 |
| 收稿时间： | 1986-12-05 |
ESR STUDY OF THE VO (H_2O)_4~(2+) COMPLEX SUPPORTED ON Y TYPE ZEOLITES |
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| Xu Yuanzhi and Wang Li.ESR STUDY OF THE VO (H_2O)_4~(2+) COMPLEX SUPPORTED ON Y TYPE ZEOLITES[J].Chinese Journal of Magnetic Resonance,1987,4(4):289-296. |
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| Authors: | Xu Yuanzhi and Wang Li |
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| Institution: | Department of Chemistry, Zhejiang University, Hangzhou |
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| Abstract: | Two kinds of ESR spectra measured from VO2+ supported on Y-type zeolites after treatments at various roast temperatures (200~700℃) are reported. Results suggest that the VO(H20)42+ ion in the cage of zeolite has two kinds of probable structures. With the increase of roast temperature, the structure (Ⅰ) turned to structure (Ⅱ) gradually. When the roast temperature was increased over 600℃, the structure (Ⅰ) disappeared entirely, and the parameter A⊥ of structure (Ⅱ) decreased gradually. This implies that the delocalization of the unpaired electron was enhanced. At last, this unpaired electron was lost and the V4+ was oxidized to V5+. The bond parameter and reducible energy level were calculated from the spectral parameters. |
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| Keywords: | zeolite ESR vanadyl |
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