Monolayers of a novel ionoselective butadienyl dye.
The novel amphiphilic benzodithia-18-crown-6 butadienyl dye (1) forms relatively stable insoluble monolayers on distilled water (collapse pressure of 41 mN/m) and on aqueous subphases containing alkali metal or heavy metal salts (collapse pressures in the range of 27-38 mN/m, respectively). The dye 1 monolayer organization depends on chromophore association and interactions (especially complex formation) with heavy and alkali metal ions as deduced from surface pressure-area and surface potential-area isotherms as well as reflection spectra and Brewster angle microscopy observations. Dye 1 undergoes specific interactions with Hg(2+) and Ag(+), respectively (formation of different complexes). Nonspecific interactions have been observed with other salts, such as KClO(4) or Pb(ClO(4))(2). Further, dye 1 monolayers on 1 mM Hg(ClO(4))(2) solution undergo reversible photoisomerization, in contrast to monolayers on water and other aqueous salt subphases.
Sergeeva
T I
TI
Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklucho-Maklaya Str. 16/10, Moscow, 117871, Russia.
Zaitsev
S Yu
SY
Tsarkova
M S
MS
Gromov
S P
SP
Vedernikov
A I
AI
Kapichnikova
M S
MS
Alfimov
M V
MV
Druzhinina
T S
TS
Möbius
D
D