Long range electron transfers between very slow diffusing tetracyanoquinodimethane and its radical anion in poly (ether) solutions
- Univ. of North Carolina, Chapel Hill, NC (United States)
The homogeneous electron self-exchange rate between 7,7,8,8-tetracyanoquinodimethane (TCNQ) and its radical anion (TCNQ) dissolved in the poly(ethylene oxide) (PEO) polymer electrolyte solvents network PEO and MW 600 000 linear PEO, is measured by detecting the enhancement of the apparent diffusion rate to TCNQ{sup {minus}} by the electron exchange reaction. The authors report results for the physical diffusion constant D{sub phys} (D{sub app,1/2}) of TCNQ{sup {minus}} and the product k{sub {delta}}{delta}{sup 2} of the TCNQ{sup {minus}/0} electron self-exchange rate constant k{sub {delta}} and the square of the center-to-center electron-transfer reaction distance {delta}. D{sub phys} is made to vary from 3 x 10{sup {minus}7} to 5 x 10{sup {minus}12} cm{sup 2}/s by choice of temperature and electrolyte concentration. 29 refs., 7 figs., 3 tabs.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG05-87ER13675
- OSTI ID:
- 273601
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 14 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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