M. Ino et al., TRANSPORT CHARACTERISTICS OF THE PHOTO-DRIVEN ACTIVE-TRANSPORT BY TRIARYL CATIONS ACROSS A LIQUID MEMBRANE, Journal of membrane science, 89(1-2), 1994, pp. 101-109
In order to understand the photo-driven active transport of anions med
iated by triaryl cations across an organic liquid membrane, the photoc
hromic properties of the carrier and the interfacial processes were ex
amined. When p-toluenesulfonate was used as a substrate, practically n
o active transport was observed with bis -(di-n-butylamino)phenyl]-4'-
methylphenylmethanol, which was ascribed to the slow release of anions
into the receiving phase. The use of the more hydrophilic bromide as
the substrate greatly increased the rate of transfer into the receivin
g phase, resulting in an efficient photo-driven active transport of br
omide. Use of the more reactive carrier 9 s[4-(di-n-butylamino)phenyl]
-10-methylacridin-9-ol also accelerated the rate-limiting release of p
-toluenesulfonate, and efficient photo-driven active transport was ach
ieved. The results indicated that photo-driven active transport is tun
able by selection of the hydrophilic anions and/or by controlling the
stability of the triaryl cations.