Electronic aspects

J. Michl and Bonacic-Koutecky, Electronic aspects of organic photochemistry, John Wiley. Sons, Tnc., New York, 1990. 

N. J. Turro, Modern Molecular Photochemistry, Benjamin/Cummings Publication Company, Menlo Park, NJ, 1978 J. Michel and V. Bonacic-Koutecky, Electronic Aspects of Organic Photochemistry, Wiley-Interscience, New York, 1990. 

Metal Nanodusters Electronic Aspects and Physico-Chemical Characterization... 

Reasons for Size, Shape, and Structure Effects 6.1. Electronic Aspects... 

Zbaida S (1995) The mechanisms of microsomal azoreduction predictions based on electronic aspects of structure-activity relationship. Drug metah Rev 27 497-516... 

The mechanical consequences of defect populations are less frequently considered than optical or electronic aspects, but they are of importance in many ways, especially when thin films or nanoparticles are considered. 

Tapia, O., Andres, J., Aullo, J. M. and Cardenas, R. Electronic aspects of the hydride transfer... 

At the low end of the hierarchy are the TS descriptors. This is the simplest of the four classes molecular structure is viewed only in terms of atom connectivity, not as a chemical entity, and thus no chemical information is encoded. Examples include path length descriptors [13], path or cluster connectivity indices [13,14], and number of circuits. The TC descriptors are more complex in that they encode chemical information, such as atom and bond type, in addition to encoding information about how the atoms are connected within the molecule. Examples of TC descriptors include neighborhood complexity indices [23], valence path connectivity indices [13], and electrotopological state indices [17]. The TS and TC are two-dimensional descriptors which are collectively referred to as TIs (Section 31.2.1). They are straightforward in their derivation, uncomplicated by conformational assumptions, and can be calculated very quickly and inexpensively. The 3-D descriptors encode 3-D aspects of molecular structure. At the upper end of the hierarchy are the QC descriptors, which encode electronic aspects of chemical structure. As was mentioned previously, QC descriptors may be obtained using either semiempirical or ab initio calculation methods. The latter can be prohibitive in terms of the time required for calculation, especially for large molecules. 

In the present work, we have examined poly(N-vinylcarbazole) (abbreviated hereafter as PVCz) and pyrene-doped poly(aethyl methacrylate) (PMMA) films by using a tine-resolved fluorescence spectroscopic aethod. Fluorescence spectra and their dynanic behavior of the forner fila were elucidated with a high intensity laser pulse and a streak camera, which nakes it possible to neasure dynaaics just upon laser ablation. This aethod reveals aolecular and electronic aspects of laser ablation phenomena (17). For the latter fila a laser pulse with weak intensity was used for characterizing the ablated and Basked areas. On the basis of these results, we demonstrate a high potential of fluorescence spectroscopy in aolecular studies on laser ablation and consider its mechanism. Experimental... 

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