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zaizaim

铁杆木虫 (正式写手)


[交流] 【求助】ESR怎样鉴定元素的价态和电子组态

是不是根据g值?知道了自己样品的g值,该如何归属呢?

哪位大侠指点一下,或者能不能发给我一下ESR的相关资料,实在是感激不尽啊!


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tangjy(金币+2):感谢应助! 2010-11-18 08:54:33
zaizaim(金币+10): 2010-11-18 08:57:02
固体催化剂的研究方法 第十五章 电子顺磁共振方法,CNKI上就有,已经发送
或者从emuch或其它地方找《固体催化剂的研究方法》整本下载
2楼2010-11-17 22:00:16
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buct_xjq

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tangjy(金币+2):感谢提供! 2010-11-18 08:54:49
zaizaim(金币+10): 2010-11-18 08:57:12
我做过铁的EPR,主要是g=2.0,2.2,4.3三个峰,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.(自己文章里德一段话,若有错误请批评指正)
3楼2010-11-17 23:03:43
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