Electron transmission spectroscopy general discussion

The temporary anions associated with low-lyin unfilled orbitals generally have lifetimes in the range of 10 - 10 s in the gas phase. This paper discusses the use of electron transmission spectroscopy (ETS) to provide information on these short-lived anions. The sensitivity of the lifetimes to changes in symmetry is illustrated by comparing the electron transmission of benzene and various alkyl substituted benzenes. 

This paper summarizes the first investigations of three- and four-membered ring compounds by the technique of electron transmission spectroscopy (ETS). He will briefly discuss two general areas associated with the negative ion states of small ring hydrocarbons ... 

The use of EPR as a key tool to characterize electronic structure and to reveal the nature of the active sites has been recently considered by Fittipaldi et al. [40], The power of the EPR technique to investigate the local properties is exemplified with C , N , B , and F , as weU as some anion codoped Ti02 and has been summarized, and the limitations and challenges are critically discussed. In particular, complementary techniques in addition to the EPR characterization, such as high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), XRD, Raman spectroscopy, and computational calculations, can improve the general understanding. 

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