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tangjy(金幣+2):感謝提供！ 2010-11-18 08:54:49
zaizaim(金幣+10): 2010-11-18 08:57:12
我做過鐵的EPR，主要是g=2.0,2.2,4.3三個(gè)峰，The co-ordination environment of Fe was further analyzed by EPR spectroscopy. The EPR spectrum of Fe-MCM-41 is shown in Figure 7. It appears that two signals, at g = 2.0 and 4.3, were mainly detected. The signal at g = 4.3 could be attributed to Fe(III) ion in tetrahedral co-ordination with strong rhombic distortion. The g value calculated at 2.0 is considered as octahedral, while such species are described as framework tetrahedral species. The absence of a weak signal at 2.2 in sample can be attributed to the absence of nonframework (superparamagnetic) iron oxide nanoparticles dispersed in the mesoprous channels. Thus, it is inferred that the iron species are exclusively in tetrahedral coordination in this material.（自己文章里德一段話，若有錯(cuò)誤請批評指正）
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