Charge-Transfer Complexation in an Aqueous Polyelectrolyte Solution. III. Complexation between Pyrenesulfonate or Anthracenesulfonate and Anthraquinonesulfonate Ions

Charge-transfer (CT) complexations between 1-pyrenesulfonate ion (PyS−; donor) and 9,10-anthraquinone-2-sulfonate ion (2-AQS−; acceptor), and between anthracene-2-sulfonate ion (ACS−; donor) and 2-AQS− ion around the cationic polymers were studied by means of absorption and fluorescence spectroscopies as well as molecular-orbital calculations. The cationic polymers used in this study were poly(allylammonium) (PAAH+) and poly(1,1-dimethyl-3,5-dimethylenepiperidinium) (PDDP+). When solutions included only donor and acceptor molecules at low concentration, such as solutions of PyS− (1 × 10−4 M)/2-AQS− (1 × 10−4 M) and ACS− (1 × 10−4 M)/2-AQS− (1 × 10−4 M), they did not show any CT complex formation. However, the addition of polymers to these solutions exhibited charge-transfer absorption bands (CT band). A continuous variation method for CT bands of Na+PyS−/Na+2-AQS− in both PAAH+Cl− and PDDP+Cl− systems showed that a 1 : 1 type (PyS− : 2-AQS−) complex preferentially formed in the vicinity of these polyions....