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Influence of Transition‐Metal Ions on the Aggregation Behavior of a Single‐Chained Ammonium Amphiphile Carrying an o ‐Hydroxyazobenzene Unit
Author(s) -
Everaars Marcel D.,
Marcelis Antonius T. M.,
Sudhölter Ernst J. R.
Publication year - 1999
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/(sici)1099-0690(199903)1999:3<627::aid-ejoc627>3.0.co;2-n
Subject(s) - chemistry , amphiphile , metal ions in aqueous solution , ammonium , metal , ion , polymer chemistry , crystallography , inorganic chemistry , organic chemistry , copolymer , polymer
A novel, single‐chained ammonium amphiphile that carries an o ‐hydroxyazobenzene unit at the terminus of its hydrophobic chain has been synthesized. This compound forms ordered thread‐like aggregates upon dispersion in water. These aggregates exhibit a phase transition at 56 °C. The o ‐hydroxyazobenzene unit binds several transition‐metal ions in a 2:1 stoichiometry. Binding of these metal ions results in a lowering of the critical aggregation concentration. From the changes in the UV absorption spectrum it is concluded that the Cu 2+ complex forms more tightly packed aggregates in water than the Zn 2+ and Ni 2+ complexes.