DETERMINATION OF VANADIUM OXYGEN BOND DISTANCES AND BOND ORDERS BY RAMAN-SPECTROSCOPY
DETERMINATION OF VANADIUM OXYGEN BOND DISTANCES AND BOND ORDERS BY RAMAN-SPECTROSCOPY
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DOI：
10.1021/j100166a025
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发表时间：
1991-06-27
影响因子：
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通讯作者：
WACHS, IE
中科院分区：
文献类型：
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作者：
HARDCASTLE, FD;WACHS, IE
建立了钒氧化物标准化合物中钒-氧（V-O）键的拉曼伸缩频率与键长的经验关联式。 晶体学确定的V-O键长的最小二乘指数拟合的V-O拉曼伸缩频率的V-O键的强度（价单位）和拉曼伸缩频率之间的关系。 这些经验相关性导致一个系统的方法来确定钒酸盐的配位和键长。 这种方法被示出为已知结构的钒酸盐（正丙醇钒，BiVO 4，α-Zn 3（VO 4）2，和Pb 2（VO 4）3Cl）和未知结构（Al VO 4和二维表面相的V2 O 5/Al 2 O3）。 该方法有望普遍适用于所有的钒酸盐，中程秩序是缺席。
An empirical correlation is developed for relating Raman stretching frequencies of vanadium-oxygen (V-O) bonds to their bond lengths in vanadium oxide reference compounds. A least-squares exponential fit of crystallographically determined V-O bond lengths to V-O Raman stretching frequencies is presented along with a relation between V-O bond strengths (in valence units) and Raman stretching frequencies. These empirical correlations lead to a systematic method for determining the coordination and bond lengths of vanadates. This method is illustrated for vanadates of known structure (vanadium n-propoxide, BiVO4, alpha-Zn3(VO4)2, and Pb2(VO4)3Cl) and unknown structure (AlVO4 and two-dimensional surface phase in V2O5/Al2O3). The method is expected to be generally applicable to all vanadates where medium-range order is absent.