An Electron Spin Resonance Study of n-Doped TCNQ and 2:1 TCNQ Complex Salts.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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Complex 21 7,7,8,8-tetracyanoquinodimethand TCNQ salts of quinoline, 2-methylquinoline, 4-methylquinoline, and 7-methylquinoline were made. Their ESR spectra were observed and their magnetic susceptibilities and resistivities were determined. A new donor, 1,4-dimethyl-1,4-dihydro-s-tetrazineDMDHT, was tried with TCNQ as acceptor. Magnetic susceptibility, resistivity, and ESR g-value measurements were made on the resulting complex. A complex of DMDHTC104- was made and an intense ESR singlet was observed. The ESR absorption of doped TCNQ was relatively constant from 350K to 100K. A possible explanation for this observed behavior is an excited state triplet 0.02 eV above the valence band of TCNQ. The lack of an observed doublet is explained with the almost-localized electron model. As ESR kinetic study of the high temperature decomposition of TCNQ indicated more than one species resulting from decomposition. Modified author abstract
- Organic Chemistry