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Two dimensional asynchronous spectra were used to characterize coordination between carbonyl group of butanone and metal ions by using an approach proposed in our recent paper. Spectral variation of n-π* transition band of carbonyl group is used to probe the coordination even if metal ions does not possess any characteristic peak in spectra. Experimental results indicate that Ca2+ and Al3+ show considerable...
In this paper, 2D asynchronous spectra generated by using the DAOSD approach was utilized to probe interactions between Nd3+ and pyridinium dissolved in aqueous solution. A series of cross peaks in the resultant 2D asynchronous spectrum confirms the occurrence of intermolecular interaction between Nd3+ and pyridinium. However, no coordination occurs between Nd3+ and pyridinium. Interaction between...
In highway engineering, pre-estimation on the global stability of highway slopes is a key to construction design and safety. The factors on slope stability include geological data, hydrographic data, situation of slopes, the way of cut, and so on. Therefore, a suitable analytical methodology of system engineering integrating the comprehensive qualitative and quantitative information is needed. A multi-level...
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