Ultrafast photoinduced electron transfer reactions in supramolecular arrays: Studies of electronic coupling and solvation

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6361504

Wasielewski, M R; Wiederrecht, G P; Svec, W A

Research in our laboratory focuses on developing supramolecular arrays that produce long-lived charge separation by limiting the electronic coupling between the separated charges, and on the role of solvation in determining the rates and energetics of photoinitiated electron transfer reactions. Arrays have been developed that closely mimic the electronic coupling that was observed only for long-lived radical pairs produced in photosynthetic glassy solids. A series of 36 fixed-distance donor-acceptor molecules using porphyrin donors, triptycene spacers, and 9 different acceptors has been prepared; these are used to probe the dependence of photoinduced charge separation rates on free energy of reaction as a function of solvent both in liquid and solid solution. Data were obtained on rates of charge separation in dioxane, MTHF, butyronitrile, toluene, chlorobenzene, and benzonitrile.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6361504
• Report Number(s): ANL/CHM/CP-79459; CONF-9306113--1; ON: DE93012910
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
COMPLEXES
CONDENSED AROMATICS
ELECTRIC CHARGES
ELECTRON TRANSFER
ENERGY STORAGE
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ION PAIRS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PORPHYRINS
SOLVATION
STORAGE
ZINC COMPLEXES