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金属羰基化合物[CpFe(CO)2]2与金属氧化物表面作用的漫反射和光声红外光谱研究
THE STUDY OF INTERACTIONS OF[CpFe(CO)2]2 WITH SURFACE OF ALUMINA AND TITANIA SUPPORTS BY DIFFUSE REFLECTION AND PHOTOACOUSTIC INFRARED SPECTROSCOPY
【Author】 Wang Jun,Xu Zhenhua,~* Zhao Xuan (Department of Chemistry,Peking University,Beijing,100871,China)
【机构】 北京大学城市环境系; 北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室;
【摘要】 <正>引言人们已经对金属有机化合物吸附在各种表面上的特性—表面金属有机化学进行了广泛的研究。本研究用漫反射红外光谱法(DRSIR)和光声红外光谱法(PASIR),研究了酸性、中性和碱性Al2O3及TiO2与[CpFe(CO)2]2的相互作用。实验称量适量(200mg)的Al2O3和TiO2,浸泡入15ml溶有[CpFe(CO)2]2的正己烷溶液中,在高纯N2气流下不断搅拌直至呈浆糊状,继续通两小时的N2气流,脱去正己烷后
【Abstract】 The diffuse reflection and photoacuostic infrared spectra of the species derived from dicarbonnyl(cyclopentadienyl)iron(0) {[CpFe(CO)2]2(Cp=C5H5)} which are supported on the surfaces of acidic,neutral and basic alumina(Al2O3) and titania(TiO2) have been measured. The structures and stabilities of these supported organometallic species depend markedly on the acid-base properties of the alumina surfaces.There is mainly species of[Cp(CO)2Fe-HFe (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 surface of[CpFe(CO)2]2/Al2O3(basic)(C),the mainly species is[CpFe(CO)]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 photoacustic 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.There is no a species derived from[CpFe(CO)2]2 to be observed. The diffuse reflection infrared spectroscopy is the powerful tool to study the interaction of organometallic compounds with powder metal oxide.
- 【会议录名称】 分子光谱学进展(Ⅸ)
- 【会议名称】第九届全国分子光谱学术报告会
- 【会议时间】1996-09-10
- 【会议地点】中国贵州贵阳
- 【分类号】O657.33
- 【主办单位】中国光学学会光谱委员会、中国化学会物理化学委员会