Structural features of a clay film hybridized with a zwitterionic molecule as analyzed by second-harmonic generation behavior
| Autor: | C.-H. Chong, Yuichirou Ogata, Gunzi Saito, Akihiko Yamagishi, Jun Kawamata |
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| Rok vydání: | 2003 |
| Předmět: |
Absorption spectroscopy
Inorganic chemistry Soil Science Crystal structure Acceptor chemistry.chemical_compound Montmorillonite Adsorption Ultraviolet visible spectroscopy chemistry Chemical engineering Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Molecule Layer (electronics) Water Science and Technology |
| Zdroj: | Clays and Clay Minerals. 51:181-185 |
| ISSN: | 0009-8604 |
| DOI: | 10.1346/ccmn.2003.0510208 |
| Popis: | Hybrid Langmuir-Blodgett (LB) films of a single clay layer and a donor-(π-electron system)-acceptor (D δ -π-A δ− ) zwitterionic molecule (ind-TCNQ), prepared from 1,3,3-trimethyl-2-methyleneindo-line (donor) and 7,7,8,8-tetracyanoquinodimethane (acceptor) were prepared. The characteristics of the electrostatic interaction between the clay layer and the ind-TCNQ molecules were investigated. The amount of ind-TCNQ molecules spread onto the air-water interface was increased systematically so that mono- and multi-layers of the molecules could be formed on the clay layer. The hybrid LB films, which were deposited onto a solid substrate, were characterized by means of UV-vis absorption spectroscopy and optical second-harmonic generation measurement. The amount of ind-TCNQ molecules adsorbed on the clay layer increased with an increase in the amount of ind-TCNQ molecules spread onto the air-water interface. On the other hand, the SHG intensities of the films did not change with the change in amount of ind-TCNQ spread. The results indicate that the electrostatic interaction between the clay layer and the ind-TCNQ molecules operates only in the region where the ind-TCNQ molecules are in direct contact with the clay layer. |
| Databáze: | OpenAIRE |
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