| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Chemical and Photoluminescence Properties of Purified Poly(2-methoxyaniline-5-sulfonicacid) and Oligomer
|
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - Both the chemical and the electrochemical synthesis of poly(2-methoxyaniline-5-sulfonate) (PMAS) in aqueousmedia have been found to give two distinct polymer fractions with molecular weights of approximately 8−10and 2 kDa, respectively. It is now possible to isolate the pure high molecular weight (HMWT) PMAS andlow molecular weight (LMWT) PMAS oligomer and to study their individual and combined photochemistryand redox chemistry. The HMWT PMAS fraction was confirmed to be an emeraldine salt by its characteristicredox and pH switching behavior, in contrast to the oligomeric LMWT PMAS, which was inert under thesame conditions. Mixtures of these two fractions exhibit photoluminescence arising from the oligomeric LMWTPMAS fraction. The observed LMWT PMAS emission was modulated by the presence of the conductingHMWT PMAS emeraldine salt via a static resonant energy transfer arising from quenching at 460 nm whenexcited at 355 nm. The nonlinear fluorophore−quencher behavior suggests that the two PMAS fractions arestrongly associated. The behavior fitted the static Perrin quenching model in which the oligomeric LMWTPMAS fluorophore is diffusionally restricted by the presence of HMWT PMAS quencher.
|
| article type
| |
| is part of this journal
| |
