Polarized-dependent IR ATR study for the structural characterization of solid-state phosphonates: Case of aluminum (4-carboxyphenyl)methylphosphonate
Polarized-dependent IR ATR study for the structural characterization of solid-state phosphonates: Case of aluminum (4-carboxyphenyl)methylphosphonate
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DOI：
10.1021/cm0217304
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发表时间：
2003-05-20
影响因子：
8.6
通讯作者：
Vioux, A
中科院分区：
文献类型：
--
作者：
Chaplais, G;Le Bideau, J;Vioux, A
杂化有机-无机膦酸酯Al（mu-OH）（O3 PCH 2C 6 H4 COOH）. H2O的结构通过其偏振ATR-FTIR光谱、MAS NMR和TGA分析与已知晶体结构的Al（mu-OH）（O3 PCH 2C 6 H4 Br）. H2O和Al（mu-OH）（O3 PCH 2C 6 H5）. H2O的结构进行了表征。偏振ATR（衰减全反射）IR研究揭示了所选键相对于样品保持器的存在和取向。此外，对于这三种化合物，极化研究可以识别出1050 cm（-1）左右的对称CPO 3振动模式;通常，对固态金属膦酸盐的定期FTIR研究不允许在该区域进行如此精确的归属红外光谱。极化ATR FTIR光谱，沿着与固态MAS NMR光谱，似乎是一个非常有效的工具，用于获得这种固态混合化合物表现出高度各向异性的微晶形状的结构信息。
The hybrid organic-inorganic phosphonate Al(mu-OH)(O3PCH2C6H4COOH).H2O has been structurally characterized by comparison of its polarized ATR-FTIR spectra, MAS NMR, and TGA analysis with those of Al(mu-OH)(O3PCH2C6H4Br).H2O and Al(mu-OH)(O3PCH2C6H5).H2O whose crystallographic structures are known. The polarized ATR (attenuated total reflection) IR study revealed the presence and orientation of selected bonds with respect to the sample holder. Moreover, for the three compounds, the polarized study allowed the identification of a symmetric CPO3 vibration mode around 1050 cm(-1); usually, regular FTIR study of solid-state metallic phosphonates does not permit such precise attribution in this region of the IR spectrum. Polarized ATR FTIR spectroscopy, along with solid-state MAS NMR spectroscopy, appeared to be a very efficient tool for obtaining structural information on such solid-state hybrid compounds exhibiting highly anisotropic crystallites shapes.