Electrochromic Properties of a Metallo-supramolecular Polymer Derived from Tetra(2-pyridyl-1,4-pyrazine) Ligands Integrated in Thin Multilayer Films


Autoria(s): Silva, Clovis A. da; Vidotti, Marcio; Fiorito, Pablo A.; Torresi, Susana Ines Cordoba de; Torresi, Roberto Manuel; Alves, Wendel A.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

05/11/2013

05/11/2013

2012

Resumo

The electrochromic behavior of iron complexes derived from tetra-2-pyridyl-1,4-pyrazine (TPPZ) and a hexacyanoferrate species in polyelectrolytic multilayer adsorbed films is described for the first time. This complex macromolecule was deposited onto indium-tin oxide (ITO) substrates via self-assembly, and the morphology of the modified electrodes was studied using atomic force microscopy (AFM), which indicated that the hybrid film containing the polyelectrolyte multilayer and the iron complex was highly homogeneous and was approximately 50 nm thick. The modified electrodes exhibited excellent electrochromic behavior with both intense and persistent coloration as well as a chromatic contrast of approximately 70%. In addition, this system achieved high electrochromic efficiency (over 70 cm(2) C-1 at 630 nm) and a response time that could be measured in milliseconds. The electrode was cycled more than 10(3) times, indicating excellent stability.

Brazilian agency Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [08/53576-9, 09/53199-3]

Brazilian agency Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)

INCT in Bioanalytics [08/57805-2, 573672/2008-3]

INCT in Bioanalytics

CNPq [470691/2010-7]

CNPq

Identificador

LANGMUIR, WASHINGTON, v. 28, n. 6, pp. 3332-3337, FEB 14, 2012

0743-7463

http://www.producao.usp.br/handle/BDPI/41190

10.1021/la204280e

http://dx.doi.org/10.1021/la204280e

Idioma(s)

eng

Publicador

AMER CHEMICAL SOC

WASHINGTON

Relação

LANGMUIR

Direitos

closedAccess

Copyright AMER CHEMICAL SOC

Palavras-Chave #LAYER-BY-LAYER #PRUSSIAN BLUE #PEPTIDE NANOTUBES #ELECTRODES #ELECTROCHEMISTRY #NANOPARTICLES #ORGANIZATION #DEVICES #ANALOGS #CHEMISTRY, MULTIDISCIPLINARY #CHEMISTRY, PHYSICAL #MATERIALS SCIENCE, MULTIDISCIPLINARY
Tipo

article

original article

publishedVersion