New TiO2 precursor for TiO2:poly(N-vinylcarbazole) (PVK) thin film: Synthesis and reactivity to hydrolysis of titanium tetrakis (9H-carbazole-9-yl-ethyl-oxy)

Barlier, Vincent; Léonard, Didier; Boiteux, Gisèle; Davenas, J.; Boisson, Fernande; Bounor‐Legaré, Véronique

doi:10.1016/j.jnoncrysol.2008.12.007

Cited by 4 publications

(1 citation statement)

References 40 publications

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“…The precipitate was then filtrated on a Buchner funnel and dried under vacuum during 12 h. Titanium (IV) isopropoxide: Ti( i OPr) 4 (98 + %, Acros Organics) was used as reference. Tetrakis (9H‐carbazole‐9‐yl‐ethyl‐oxy) titanium: Ti(OeCarb) 4 , was synthesized according to an alcoholysis reaction 6 between titanium isopropoxide and 9H‐carbazole‐9‐ethanol (ECOH). The molecular structures of poly(N‐vinylcarbazole), titanium isopropoxide and tetrakis (9H‐carbazole‐9‐yl‐ethyl‐oxy) titanium, which have been identified by 1 H and 13 C NMR, are presented in Fig.…”

Section: Methodsmentioning

confidence: 99%

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Davenas

Barlier

Legaré

et al. 2010

Physica Status Solidi (a)

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International audiencePoly(vinylcarbazole)/TiO2 hybrid thin films have been produced by the hydrolysis condensation of titanium alkoxide precursors dispersed in a polymer layer deposited on ITO substrates. Common alkoxide precursors like titanium isopropoxide [Ti((OPr)-O-i)(4)] show a fast hydrolysis beginning during film deposition, which leads to early phase separation. A new TiO2 precursor precursor bearing carbazole groups: titanium tetrakis 9H-carbazole-9-yl-ethyl-oxy [Ti(OeCarb)(4)] has been used to slow down the reactivity of the precursor by a steric hindrance effect. Improved precursor dispersion in the polymer solution is obtained for this new precursor leading to an homogeneous dispersion of the TiO2 phase at the nanoscale in the hybrid film. Rutherford Backscattering Spectrometry has shown that the hydrolysis condensation was effective with the production of carbazol alcohol remaining trapped in the bulk of the film. This residual alcohol leads to an increase of the UV optical absorption of the PVK/TiO2 hybrid films. Improvement of the balance between the two types of photogenerated charges has been shown by surface potential decay experiments upon the formation of a TiO2 conduction network for the transport of electrons. The film is almost transparent above 350 nm opening a new route for the elaboration of semi-transparent photovoltaic glasses, which can find application on the growing market of energy efficient buildings

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Section: Methodsmentioning

confidence: 99%

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Davenas

Barlier

Legaré

et al. 2010

Physica Status Solidi (a)

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Influence of a non-polar medium (alkane and molten polypropylene) on the titanium n-butoxide hydrolysis-condensation reactions

Bahloul¹,

Bounor‐Legaré²,

Seytre³

et al. 2010

J Sol-Gel Sci Technol

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International audienceStudy of hydrolysis-condensation reactions of titanium n-butoxide precursor into an unusual medium and non-classical conditions was carried out. Kinetic data were reached in a temperature range of 130-250A degrees C from FTIR, TGA-GC-MS and rheological techniques. These results were obtained into an alkane dispersing medium, (Squalane: 2,6,10,15,19,23-hexamethyltetracosane), and compared to the ones determined from the hydrolysis-condensation reactions of the titanium dioxide precursor carried in molten polypropylene (PP) during extrusion process. The transposition of these knowledge to the in situ synthesis of titanium dioxide in molten PP matrix by reactive extrusion lead to the formation of a fine dispersion of few nanometer diameter (similar to 5 nm) of TiO2 particles. Finally, the viscoelastic behaviour of the nanocomposite has been strongly altered in the terminal relaxation zone as permanent secondary plateau (solid-like behavior), attributed to some fractal arrangement of the inorganic domains was observed

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Structural characterisation and antibacterial activity of PP/TiO2 nanocomposites prepared by an in situ sol–gel method

Bahloul

Mélis

Bounor‐Legaré

et al. 2012

Materials Chemistry and Physics

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New TiO2 precursor for TiO2:poly(N-vinylcarbazole) (PVK) thin film: Synthesis and reactivity to hydrolysis of titanium tetrakis (9H-carbazole-9-yl-ethyl-oxy)

Cited by 4 publications

References 40 publications

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Influence of a non-polar medium (alkane and molten polypropylene) on the titanium n-butoxide hydrolysis-condensation reactions

Structural characterisation and antibacterial activity of PP/TiO2 nanocomposites prepared by an in situ sol–gel method

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New TiO2 precursor for TiO2:poly(N-vinylcarbazole) (PVK) thin film: Synthesis and reactivity to hydrolysis of titanium tetrakis (9H-carbazole-9-yl-ethyl-oxy)

Cited by 4 publications

References 40 publications

Hybrid polymer/TiO2 films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Hybrid polymer/TiO2 films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Influence of a non-polar medium (alkane and molten polypropylene) on the titanium n-butoxide hydrolysis-condensation reactions

Structural characterisation and antibacterial activity of PP/TiO2 nanocomposites prepared by an in situ sol–gel method

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Product

Resources

About

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows

Hybrid polymer/TiO₂ films by in situ hydrolysis condensation of titanium alkoxide precursors for photovoltaic transparent windows