Electrochromic Properties of a Metallo-supramolecular Polymer Derived from Tetra(2-pyridyl-1,4-pyrazine) Ligands Integrated in Thin Multilayer Films
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
05/11/2013
05/11/2013
2012
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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 |
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 |