Charge-transfer (CT) complexation between indoxyl sulfate (3-indolyl hydrogen sulfate) (INS-: electron donor) and 9,10-anthraquinone-2-sulfonate (2-AQS-: electron acceptor) around cationic polymers (poly-(allylammonium chloride) (PAAH+Cl-) and poly(1,1-dimethylpiperidinium-3,5-diylmethylene chloride) (PDPD+Cl-)) were studied by absorption and fluorescence spectroscopies and molecular orbital calculation. New broad UV bands corresponding to CT complexation between InS- and 2-AQS- at low concentration (∼10-4 M) was observed when these polymers were present in the systems. A continuous variation method for the InS-/2-AQS-/polymer systems showed that a novel type (INS-: 2-AQS- = 2:1) CT complex preferentially formed in the vicinity of these polyions. Stoichiometric ratio of the present CT complex was not affected by the structure and charge density of polyelectrolytes.
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Materials Chemistry