Photoinduced electron transfer in the solid state: Rate vs free energy dependence in fixed-distance porphyrin-acceptor molecules

Journal Article · Wed Jan 16 04:00:00 EST 1991 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00002a076· OSTI ID:5212382

Gaines, III, G L; O'Neil, M P; Svec, W A; Niemczyk, M P; Wasielewski, M R ^[1]

---

1. Argonne National Lab., IL (USA)

The authors recently reported that the ion-pair states in two porphyrin-triptycene-acceptor molecules are destabilized by as much as 0.9 eV in going from a polar liquid to a rigid glass. To obtain a quantitative picture of the dependence of charge-separation rate on free energy of reaction in the rigid glass they present electron transfer rate data on 14 porphyrin-triptycene-acceptor molecules, which possess sufficiently large, negative free energies for charge separation to allow electron transfer to compete with excited singlet state decay in glassy 2-methyltetrahydrofuran (MTHF) at 77 K.

• OSTI ID: 5212382
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 113:2; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
DATA
ELECTRON TRANSFER
EXPERIMENTAL DATA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
LOW TEMPERATURE
MEASURING METHODS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PORPHYRINS
REACTION KINETICS
SYNTHESIS