Improvement in the emission properties of a luminescent anionic dye intercalated between the lamellae of zinc hydroxide-layered

Autor(es)

Junior Quites, Fernando ^{[1, 2]} ; Germino, Jose Carlos ^[1] ; Zambon Atvars, Teresa Dib ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, BR-13084971 Campinas, SP - Brazil

^[2] Univ Fed Mato Grosso, Dept Chem, BR-78060900 Cuiaba, MT - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS; v. 459, p. 194-201, OCT 5 2014.
• Citações Web of Science: 3

Resumo

A luminescent green anionic dye, 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium, has been intercalated between the layers of the zinc hydroxide-layered (here named as ZHL-layered-NO3) using an anion exchange technique to produce new luminescent organic-inorganic hybrid materials with interesting photoemission properties. X-ray diffraction, FTIR, UV-vis spectroscopic and scanning electron microscopic studies have shown the incorporation of the luminescent anionic dye between the layers of the inorganic host. X-ray diffraction studies revealed increases in the basal spacing of ZHL-layered hybrid after the intercalation of the green dye using different time intercalation. The interlayer spacing increased from 0.98 nm in the pristine ZHL-layered NO3 to 3.54, 3.18 and 3.62 nm in the ZHL-layered/Py-SO3-3 composites at 12, 24 and 48 h of time intercalation, respectively. Photophysical properties of these new luminescent hybrids (ZHL-layered/Py-SO3-3) were also investigated using the UV-vis absorption, steady-state and dynamic fluorescence spectroscopies. All hybrid materials presented UV-vis absorption bands and photoemission at green region due to the presence of the anionic dye in the galleries of the inorganic layered. For the material produced at 12 h of time intercalation, a higher quantum yield photoluminescence (phi(PL) = 13.0%) was observed compared to the pure dye solid (phi(PL) = 1.0%). This result was attributed to the confinement of the anionic species in the host two-dimensional gallery. These observations open new opportunities for the use of this organic dye immobilized in alternative layered compound for electronic devices or for sensors. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/16245-2 - Propriedades fotofísicas de filmes finos de polímeros conjugados
• Beneficiário: Teresa Dib Zambon Atvars
• Modalidade de apoio: Auxílio à Pesquisa - Regular