Layer-by-Layer Naphthalenediimide/Zn Phosphonate Hybrid Films Grown from Aqueous Solutions by a Simple Deposition Technique

Autor(es)

Tosco, Bruna ^[1] ; Melo, Barbra Poly-Anna Vera ^[1] ; Merino, Daniel Hermida ^[2] ; Rey, Jose Fernando Queiruga ^[1] ; Brochsztain, Sergio ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC, Engn Modeling & Appl Social Sci Ctr, BR-09210170 Santo Andre, SP - Brazil

^[2] Netherlands Org Sci Res NWO, F-38043 Grenoble - France

• Tipo de documento: Artigo Científico
• Fonte: Langmuir; v. 37, n. 7, p. 2494-2502, FEB 23 2021.
• Citações Web of Science: 0

Resumo

Hybrid thin films containing N,N'-bis(2-phosphonoethyl)-1,4,5,8-naphthalenediimide (PNDI) and zinc cations (PNDI/Zn films) were built on silicon and indium tin oxide (ITO) substrates by a simple layer-by-layer deposition process. Silicon substrates primed with a layer of phosphonate groups were immersed alternately into zinc nitrate and PNDI aqueous solutions, yielding PNDI/Zn films containing up to 40 layers. ITO substrates, on the other hand, were used without priming, and the deposition sequence began with a PNDI layer. All film growth steps were conducted at room temperature, using aqueous solutions, thus assuring an environmentally clean process. The PNDI/Zn films were studied by X-ray reflectivity and grazing angle X-ray diffraction, using synchrotron radiation source. The films were constituted by crystallites, containing zinc phosphonate layers oriented nearly parallel to the substrate. PNDI/Zn films on ITO were reduced to stable free radicals, which were observed by UV-visible spectroscopy. Moreover, PNDI/Zn bulk materials with structural analogy with the films were produced. (AU)

• Processo FAPESP: 16/19791-6 - Estudo de Nucleação e Crescimento de Nanoparticulas assistido simultaneamente por técnicas de Espalhamento de Raios X a Baixos e Médios Ângulos (SAXS/ WAXS) e Espectroscopia de Absorção de Raios X (XAS) em combinação com Espectroscopia UV-VIs
• Beneficiário: Jose Fernando Queiruga Rey
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 16/05496-2 - Síntese e caracterização de organosílicas mesoporosas contendo imidas aromáticas e suas aplicações na área de energia
• Beneficiário: Sergio Brochsztain
• Modalidade de apoio: Auxílio à Pesquisa - Regular