金属羰基化合物（CpFe（CO）2）2与金属氧化物表面作用的傅里叶变…

用漫反射红外光谱和光声红外光谱研究了金属羰基化合物（ＣｐＦｅ（ＣＯ）２）２Ｃｐ＝η＾５－Ｃ５Ｈ５与酸性，中性和碱性Ａｌ２Ｏ３及ＴｉＯ２的相互作用，结果表明，在Ａｌ２Ｏ３表面生成的洗生物种类及浓度与Ａｌ２Ｏ３的酸碱度明显相关，在酸性Ａｌ２Ｏ３表面，主要存在衍生物（ＣｐＦｅ（ＣＯ）２Ｆｅ－Ｈ－Ｆｅ（ＣＯ２Ｃｐ）＾＋及少量的ＣｐＦｅ（ＣＯ）２（－Ｏ－）；在中性Ａｌ２Ｏ３表面存在的ＣｐＦｅ（ＣＯ）２（－Ｏ

The study of interactions of [CpFe(Co)2]2 with surface of alumina and Titania supports by Fourier transform diffuse reflection and photoacoustic infrared spectroscopy]

The diffuse reflection and photoacoustic infrared spectra of the species derived from dicarbonyl (eta5-cyclopentadienyl)iron (0) {CpFe(CO)2]2 (Cp = eta5-C5H5)} which are supported on the surfaces of acidic,neutral and basic alumina (Al2O3) and Titania (TiO2) have been measured. The structures, stabilities and concentrations of these supported organometallic species depend markedly on the acid-base properties of the alumina surfaces. There is mainly species of CpFe(CO)2Fe-H-Fe(CO)2Cp]+ on the surface of CpFe (CO)2]2/Al2O3 (acidic) (A). The species of CpFe(CO)2(-O-) and CpFe(CO)]4 are observed on the surface of CpFe(CO)2]2/Al2O3(neutral)(B). On the suface of CpFe(CO)2]2/Al2O3 (basic) (C), the mainly species is CpFe(CO)2]4 with a few CpFe(CO)2(-O-) species. The concentration of species is highest on the surface of A and lowest on the, surface of C. The diffuse reflection and photoacoustic (middle and near )infrared spectra of CpFe(CO)2]2/TiO2(T) show that the CpFe(CO)2]2 absorbed on the surface of TiO2 is stable in the air at the room temperature. There is no a species derived from CpFe(CO)2]2 to be observed. The diffuse reflection near infrared spectra of CpFe(CO)2]2(D) and CpFe(CO)2]2/TiO2 (T) are measured. Most of them are assigned to overtone and combination of carbonyl vibrations and several peaks are assigned to triple overtone and triple combination. The diffuse reflection infrared spectroscopy is the good method to study the interaction of organometallic compounds with metal oxide powder.