Adsorption of Styryl Pyridinium Dyes on Silica Gel

✍ Scribed by Sudam K Parida; Bijay K Mishra

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 120 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0490

✦ Synopsis

at the interface of reversed micelles (6). On water surfaces The adsorption behavior of some monochromophoric and bischrothese dyes orient themselves as J-aggregates occupying mophoric styryl pyridinium dyes on silica gel has been investigated. around 75 A ˚2 molecule, which was determined from the The effect of temperature, chain length, and substituent on the adsurface area/pressure curve. From the bathochromic shift of sorption phenomena have been studied. The adsorption isotherms the electronic spectra of 5 at reversed micellar interface, a are found to be of S-and L-types, depending on the structure of the J-aggregation of the dyes has been proposed (6).

adsorbate. The rates of adsorption have been determined for all the

The surface of silica has been studied in detail by many adsorbates and variation in the rates has been explained in accorworkers. Adsorption of various organic molecules with cardance with the structure of the adsorbates. The surface area of the bonyl groups, ethers, diols, etc. has been investigated by dyes has been calculated using literature data and compared with coverage area/molecule. The result is explained through monolayer Rochester and co-workers (7). Mostly they have proposed adsorption of the dyes.