title: Structure-selective dye uptake into an aggregate of a copolymer with linear polyelectrolyte block and hydrophobic block carrying pendant dendritic moiety in water.
abstract: Selective uptake of various dyes into an aggregate of amphiphilic copolymer consisting of a hydrophilic linear polyelectrolyte block and hydrophobic block carrying pendant dendritic moiety has been investigated in water. The copolymer associated into an aggregate with a hydrophobic interior at concentrations above 0.2 mg cm(-3). The uptake (23 and 36 molecules per aggregate, respectively) of pyrene and Oil Yellow in an aggregate was one order higher than that of benzo[a]pyrene and SudanIII. The hydrophobic dyes are always doped in the interior of the aggregate, but the difference in uptake among dyes may depend on their structure. Even if a large number of guest molecules was doped into the interior of an aggregate, the size of the sphere-like aggregate was conserved. It is suggested that guest molecules are encapsulated into the persisting cavity within and between hydrophobic dendron moieties in an aggregate. Structure-selective uptake reported in this investigation is a unique character of an aggregate of copolymer with dendron moiety because the dendron moiety offers a large void for doping.
authors.affiliation: Graduate School of Science and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Kana
authors.initials: K
authors.lastname: Tamano
authors.forename: Toyoko
authors.initials: T
authors.lastname: Imae
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Yusa
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Shimada