Spin-lattice relaxation of the solitonic defect in isotopically substituted trans-polyacetylene

Journal Article · Thu May 31 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100374a063· OSTI ID:6429868

Denis, R St; Hustedt, E J; Robinson, B H ^[1]; Mailer, C ^[2]

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1. Univ. of Washington, Seattle (USA)
2. Univ. of New Brunswick (Canada)

We have measured the spin-lattice relaxation rates, R{sub 1}, for the spin of the electron defect in pristine trans-polyacetylene (t-PA) as a function of temperature for the isotopic forms (CD){sub x}, ({sup 13}CD){sub x}, (CH){sub x}, and ({sup 13}CH){sub x}. The data have been compared with the soliton-phonon-based dynamics model of Maki and the localized metal-phonon based dynamics model of Robinson et al. We concluded that the latter model is preferred; it exactly explains the R{sub 1} data for (CD){sub x} and ({sup 13}CD){sub x} t-PA. We find that the R{sub 1} data of the proton-containing forms of t-PA, (CH){sub x} and ({sup 13}CH){sub x}, are complicated by the presence of spin 1/2 nuclei, which are strongly coupled to each other, and which provide an additional dynamic path for defect-spin relaxation.

• OSTI ID: 6429868
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:11; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SEMICONDUCTORS
POLYACETYLENES
POLYENES
QUASI PARTICLES
RELAXATION
SEMICONDUCTOR MATERIALS
SOLITONS
SPIN-LATTICE RELAXATION