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Raman spectra of charge transfer organic compounds: Conductors And Semiconductors

Published online by Cambridge University Press:  10 February 2011

R. Gómez ,
R. Ridaura ,
M. Quintana ,
M. L. Marquina ,
V. Marquina ,
M. Jiménez ,
S. Aburto ,
J. Gómez-Lara  and
B. González-Rolón
R. Gómez
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
R. Ridaura
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
M. Quintana
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
M. L. Marquina
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
V. Marquina
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
M. Jiménez
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
S. Aburto
Affiliation:
Facultad de Ciencias, UNAM. México D.F., 04510.
J. Gómez-Lara
Affiliation:
Instituto de Química, UNAM. México D.F., 04510.
B. González-Rolón
Affiliation:
Instituto de Investigaciones en Materiales, UNAM. México D.F., 04510.
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Abstract

A series of coordination compounds -macrocycle tetraaza derivatives with extended electronic conjugations- as molecular solids have been synthesized and analyzed by Raman spectroscopy. Their resistivity vs. temperature characteristics, measured in thin films, show three types of behavior: metallic, semiconductor and, in some cases, semiconductor with a transition to metallic below certain temperature. Room temperature Raman spectra were obtained in a FT-IR spectrometer and some stretching modes show different Raman shifts depending on the reactants. We relate these shifts with the degree of charge transfer between donor and acceptor radicals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 413: Symposium W – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials III , 1995 , 689
Copyright
Copyright © Materials Research Society 1996

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References

REFERENCES

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