Triplet-state electron transfer in poly(methacrylic acid) with covalently bound phenanthrene and naphthalene

Journal Article · Thu Jan 24 04:00:00 EST 1991 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100155a085· OSTI ID:5926159

Chatterjee, P K; Kamioka, K; Batteas, J D; Webber, S E ^[1]

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1. Univ. of Texas, Austin (USA)

Poly(methacrylic acid) was prepared with small loadings of the aromatic chromophores phenanthrene and naphthalene (r-MPh and r-MNaph, respectively), and the quenching of the triplet state by the zwitterionic viologen 4,4{prime}-bipyridinio-1,1,{prime}-bis(propanesulfonate)(SPV) was characterized. It was found that the quantum yield for separation of ion-pair states per electron-transfer quenching event exceeded 0.4 in all cases, and for favorable cases, approached unity. The optimal pH for ion-pair separation was 6 for PMA-Ph and 11 for PMA-Naph. The triplet state yield was found to decrease dramatically with increased chromophore loading, which the authors believe to be the result of singlet-state self-quenching.

• DOE Contract Number: FG05-86ER13629
• OSTI ID: 5926159
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 95:2; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
AROMATICS
CARBOXYLIC ACIDS
CONDENSED AROMATICS
DATA
ELECTRON TRANSFER
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MEASURING METHODS
METHACRYLIC ACID
MONOCARBOXYLIC ACIDS
NAPHTHALENE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHENANTHRENE
SPECTRA