Sensitization processes in materials based on compounds containing a Xe-O bond

• Main Authors: Kondratenko, P.A., Lopatkin, Yu.M., Sakun, T.N.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2008
• Series: Functional Materials
• Subjects: Characterization and properties
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/134553

The work contains the results of experimental and theoretical studies of the sensitization processes in compounds with the Xe-O type bond between the molecule fragments. Such a bond is formed between a molecule containing completely occupied molecular orbitals and another one being in the triplet ground state. Such molecules include diazonium salts, azides, as well as molecules comprising a heteroatom with localized n-orbital to which an oxygen atom is connected. The studies have shown that all such compounds inherit a series of XeO molecule features, namely, exhibit a photochemical activity and might be photosensitized. The sensitization possibilities according to the electron transfer and energy transfer mechanisms as well as the chemical sensitization have been considered. All three sensitization types have been shown to be possible in diazonium salts. This is due to the fact that the dissociative state of diazonium cation is the lower excited state and, moreover, the an additional electron is localized on that state. For azides and molecules comprising an N-O bond, the sensitization according to the energy transfer mechanism is only possible except for the sensitization to hard radiation, when the electron capture becomes possible on the dissociative state of the photo-active molecule being a high-excited state.