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Journal of the Mexican Chemical Society

Print version ISSN 1870-249X

J. Mex. Chem. Soc vol.49 n.2 México  2005

 

Article

 

Electrochemical and Atomic Force Microscopy Investigations of New Materials from N-Trifluoromethanesulfonyl-1-azahexa-1,3,5-trienes Derivatives

 

Margarita Rivera*,a, Cecilio Alvarez-Toledanob, Abel Morenob, José D. Sepúlveda-Sánchezc, Tomás Hernández-Pérezd and María E. Sánchez-Vergarae

 

a Instituto de Física, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., México. * e-mail: mrivera@servidor.unam.mx

b Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., México

c Laboratorio de Microscopía Electrónica, Universidad Autónoma Metropolitana-Iztapalapa, 09340 México, D.F., México

d Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, 02200 México, D.F., México

e Departamento de Ingeniería Mecánica, I.T.E.S.M., Campus Ciudad de México, 14380 México, D.F., México

 

Received: November 16, 2004
Published on the web: May 3, 2005

 

Abstract

Thin films have been created on the surface of highly oriented pyrolytic graphite electrodes from chemically synthesized π-donor species by using the cyclic voltammetry technique and in situ electrochemistry-atomic force microscopy. Results indicate that it is possible to form new compounds called molecular materials from the coupling of electro-oxidized N-trifluoro-methanesulfonyl-1-azahexa-1,3,5-triene species and a [Cr(C2O4)3]3- anion. Different techniques such as AFM, SEM and EDS were employed to characterize the films morphology and composition. Results indicate that the new materials exhibited a particular electrochemical response and a different film texture depending on the chemical composition of the starting compounds.

Keywords: thin films, electrodeposition, in situ AFM

 

Resumo

Filmes finos foram crescidos sobre a superfície de elétrodos de grafito pirolizado altamente orientado a partir de precursores p-doadores utilizando a técnica cíclica de voltametria cíclica e eletroquímica-microscopia de força atômica. Os resultados indicam que é possível a formação de novos compostos chamados materiais moleculares, estes são formados pelo acoplamento de espécies N-trifluormetanosulfonil-1-aza-hexa-1,3,5-trieno eletro-oxidadas e o anion [Cr(C2O4)3]3-. Diferentes técnicas foram empregadas para caracterizar a morfologia e composição dos filmes formados. Os resultados indicam que os materiais novos exibiram uma resposta eletroquímica particular e uma textura diferente dependendo da composição química dos materiais de partida.

 

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Acknowledgments

The authors want to dedicate this work to our colleague and friend T. Hernandez-Perez. M.E. Sanchez-Vergara thanks CONACYT project number J36715-U. A. Moreno acknowledges CONACYT project number 36155.

 

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