Titanium-Oxo Clusters, Versatile Nanobuilding Blocks for the Design of Advanced Hybrid Materials

Rozes, Laurence; Steunou, Nathalie; Fornasieri, Giulia; Sánchez, Clément

doi:10.1007/s00706-006-0464-6

Cited by 121 publications

(93 citation statements)

References 75 publications

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“…This phenomenon, also called "poisoning" effect towards oxo-polymers growth was observed by Roses et al [31] when strong complexating agent such as benzoic acid is used.…”

Section: Resultsmentioning

confidence: 64%

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Ivanova

Penkova

Hidalgo

et al. 2015

Applied Catalysis B: Environmental

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This study proposes a direct synthetic route to single titanate sheets through the mild and versatile conditions of the "chimie douce". The stages of the production include the complexation of the titanium alkoxide precursor by benzoic acid, the formation of titanium oxo-clusters and their controlled transformation into single sheet titanates during the hydrolysis stage. The resulted material appears to be an excellent precursor for self -organized TiO 2 nanotubes formation which presents an excellent activity as photocatalyst in the photo-degradation of phenol.

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“…This phenomenon, also called "poisoning" effect towards oxo-polymers growth was observed by Roses et al [31] when strong complexating agent such as benzoic acid is used.…”

Section: Resultsmentioning

confidence: 64%

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Ivanova

Penkova

Hidalgo

et al. 2015

Applied Catalysis B: Environmental

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“…The higher degree of substitution by the bidentate carboxylate ligands forces the structure to become less condensed, since a coordination number larger than six is not possible. A smaller degree of substitution was found in [Ti 6 O 4 (OR) 8 (OOCRЈ) 8 ], [19,49] [Ti 6 O 4 (OR) 12 (OOCRЈ) 4 ], [27] and [Ti 4 O 4 (OR) 4 (OOCRЈ) 4 ]. [50] The titanium atoms are octahedrally coordinated in all derivatives, and the carboxylate ligands are bridging.…”

Section: Introductionmentioning

confidence: 99%

“…One particular advantage of such compounds is that they allow the easy introduction of functional substituents. [10,12] Nevertheless, by this method one has no control over the metaloxo core structure or the number of the functional ligands. However, the chemical modification of well-defined robust NBUs opens the possibility to a controlled design of the new hybrid architectures.…”

Section: Introductionmentioning

confidence: 99%

Ti₈O₈(OOCR)₁₆, a New Family of Titanium–Oxo Clusters: Potential NBUs for Reticular Chemistry

et al. 2010

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The reactions of titanium alkoxides with a large excess of different carboxylic acids under nonhydrolytic conditions leads to the reproducible formation of well‐defined nano‐building units (NBUs) with the formula [Ti8O8(OOCR)16] [R = C6H5, C(CH3)3, CH3]. The structures of these titanium–oxo–carboxylate clusters have been determined by crossingdifferent characterization techniques and methodologies (single‐crystal X‐ray diffraction, 13C and 1H NMR spectroscopy, and FTIR spectroscopy). These NBUs are obtained in high yields and, since all the alkoxo ligands have been removed by using solvothermal‐synthesis conditions, they present better stability upon hydrolysis than the often reported alkoxo–carboxylate–titanium–oxo clusters [TinO2n–x/2–y/2(OR′)x(OOCR)y] (n ≥ 2; x ≥ 1; y ≥ 1). In addition, the solubility and transferability of these clusters in common solvents can be tuned by selecting the nature of the organic ligand. Moreover, we also report for the first time, a robust post‐modification of the carboxylate ligands by transesterification reactions on the titanium–oxo clusters. These reactions keep the integrity of the octameric titanium–oxo core intact, while completely exchanging the organic shell of the cluster. This family of [Ti8O8(OOCR)16] clusters, which present 16 points of extension, a symmetric shape, and the ability to be post‐modified with conservation of the core structure, can therefore be considered as interesting NBUs to form new metal–organic frameworks.

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“…β-diketones or carboxylic acids) can be used to modify the reactivity of the titanium alkoxide by increasing the coordination number of the metal and decreasing the number of hydrolysable groups. By using such modified precursors and a substoichiometric amount of water, which means that the hydrolysis ratio (H = n H2O /n TTIP ) is lower than 1, the hydrolysis and condensation sequence can be completely controlled [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

Malengreaux

Timmermans

Pirard

et al. 2012

Chemical Engineering Journal

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TiO 2 thin films have been produced by a dip-coating process using a non-aqueous sol-gel method. This study investigated the influence of the operating variables such as nature of the substrate, sol concentration, withdrawing speed of the dip-coater and number of layers on the physico-chemical properties of the films using XRD, GIXRD, UV-Vis spectroscopy, profilometry, spectroscopic ellipsometry and SEM. Photocatalytic activity of the films was * Corresponding author. The performances of the catalysts were compared through the reaction rate constants determined using an apparent first-order kinetic model adjusted on the experimental data.This study showed that the photocatalytic activity and the reaction rate constant depend on the film thickness through the synthesis and dipping variable, with an optimum thickness of 80 nm being observed. An optimized transparent film exhibiting a high adhesion, a well crystallized TiO 2 -anatase phase, a good photocatalytic activity and a reaction rate constant k equal to 0.126 h -1 was obtained using a simple process. The specific photocatalytic activity of this film was higher to the one measured for TiO 2 powders in previous works.

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Titanium-Oxo Clusters, Versatile Nanobuilding Blocks for the Design of Advanced Hybrid Materials

Cited by 121 publications

References 75 publications

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Ti₈O₈(OOCR)₁₆, a New Family of Titanium–Oxo Clusters: Potential NBUs for Reticular Chemistry

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

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Titanium-Oxo Clusters, Versatile Nanobuilding Blocks for the Design of Advanced Hybrid Materials

Cited by 121 publications

References 75 publications

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Synthesis and application of layered titanates in the photocatalytic degradation of phenol

Ti8O8(OOCR)16, a New Family of Titanium–Oxo Clusters: Potential NBUs for Reticular Chemistry

Optimized deposition of TiO2 thin films produced by a non-aqueous sol–gel method and quantification of their photocatalytic activity

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Ti₈O₈(OOCR)₁₆, a New Family of Titanium–Oxo Clusters: Potential NBUs for Reticular Chemistry