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sunxiuxin

金虫 (小有名气)

[交流] 【求助】switch-NLO已有1人参与

最近看了几篇做配合物NLO开关的文献,文献中都有提到氧化电势和还原电势,通过比较电势的变化趋势,比如金属的氧化电势的大小,就可以推断出由于其HOMO轨道不稳定,从而使金属离子中心易于被氧化(In the previously reported series 1-4, the RuIII/II E1/2 value increases very slightly with the electron-accepting ability of R, but no corresponding trend is observed in the new series 5-7,indicating that the Ru-based HOMO is not significantly coupled to the pyd unit in these extended species. The sequential addition of electron-rich vinyl units to LA destabilizes the HOMO and makes the RuII center progressively easier to oxidize)。对这一点不太明白,为什么通过比较E就能知道金属被氧化的难易程度,是不是E值越小越容易氧化呢,还有电势的大小与配合物的NLO之间又有什么关系呢?
第二点,通过计算可以得到配合物的ΔG,利用这个ΔG是怎么计算求得E的呢,就是这段话:The free energy change associated with the reference normal hydrogen electrode halfreaction has been recalculated to be -4.36 V.33 So the reference saturated calomel electrode (SCE) should be -4.60 V. When the Nernst equation E° ) -ΔG°/nF is combined with the reference value -4.60 V, the reduction potentials
(Ecal) can be predicted.
对氧化还原有很多困惑,肯求高手指点,谢谢!
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sunxiuxin

金虫 (小有名气)

怎么都没有人理我?
2楼2010-06-26 15:38:03
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