Group work chemical bonding

Fourier transform infrared (FTIR) analysis works on the fact that chemical bonds and groups of chemical bonds vibrate at characteristic frequencies. During FTIR analysis, a modulated infrared (IR) beam is spotted on the specimen. The transmittance and reflectance of the infrared rays at different frequencies is then translated into an IR absorption plot consisting of reverse peaks, which after matching and identification provides information about the chemical bonding or molecular structure of materials, whether organic or inorganic. 

In recent work by Arkles el al. [4, 5], it has been proposed that, in comparison with monomeric silanes, polymeric silanes may react with substrates more efficiently. A typical polymeric silane is shown in Fig. la, in which pendant chains of siloxanes are attached through methylene chain spacers to a polyethyleneimine backbone. The film-forming polymeric silane thus provides a more continuous reactive surface to the polymer matrix in the composite. In this case, the recurring amino groups on the polymeric silane backbone can react with an epoxy resin matrix through chemical bond formation. 

Beginning in the 1960s, Richard Bader initiated a systematic study of molecular electron density distributions and their relation to chemical bonding using the Hellmann-Feynman theorem.188 This work was made possible through a collaboration with the research group of Professors Mulliken and Roothaan at the University of Chicago, who made available their wave-functions for diatomic molecules, functions that approached the Hartree-Fock limit and were of unsurpassed accuracy. 

Previous work by our and other groups has shown that the Pt L3 XANES is sensitive to the adsorption of H. This sensitivity was interpreted by our group as being caused by the creation of a chemical bond between Pt and H30. The Pt-H anti-bonding state (AS) above the Fermi level was thought to produce a shaperesonance arising from the interference between the resonantly and nonresonantly scattered photoelectron waves. 

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