Structural Effects on the Interaction between cis-Dialkoxyazobenzene and a Pyridinium Compound at the Glass–Heptane Interface as Studied by in Situ Second Harmonic Generation
✍ Scribed by Keiji Yamada; Sunao Yamada
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 65 KB
- Volume
- 216
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
The in situ optical second harmonic generation (SHG) technique was applied to the direct investigation of interactions between cis-dialkoxyazobenzene and a pyridinium compound at the glass-heptane interface. The SHG response due to noncentrosymmetric adsorption of the SHG-active cis-isomer was profoundly dependent on the structure of the pyridinium compound preadsorbed at the glass surface. It is suggested that the cis-isomer can interact preferentially with a bipyridinium compound in which the two pyridinium moieties are spatially separated to be able to interact snugly with the two phenoxy moieties of cis-dialkoxyazobenzene.