Photodegradative surfactants: photolyses of p-alkylbenzyltrimethylammonium and alkylbenzyldimethylammonium halides in aqueous solution.
A series of benzyl-containing ammonium salts, p-alkylbenzyltrimethylammonium halides (C(n)BA: 1a-c) and alkylbenzyldimethylammonium halides (C(n)AB: 2a-d), have been prepared and their photodegradabilities in aqueous solutions have been compared. The photolytic decomposition proceeded by heterolytic and homolytic cleavages of the benzyl-nitrogen bond. The conversion yields were almost the same for all surfactants, whereas the product yields were slightly dependent on the alkyl-chain length. After irradiation, C(8)BA (1b) and C(12)BA (1c) were converted to non-surfactants, whereas C(12)AB (2c) and C(16)AB (2d) still remained surface-active. Their solution properties were concomitantly changed.
Itoh
Yoshihiro
Y
Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan. yositoh@giptc.shinshu-u.ac.jp
Horiuchi
Satoshi
S
Yamamoto
Kenji
K