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Issue 3, 2014
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Porous titanium and zirconium oxo carboxylates at the interface between sol–gel and metal–organic framework structures

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Abstract

Reaction of Ti(OiPr)4 with several tri- and tetracarboxylic acids, followed by hydrolysis, resulted in microporous, structured materials, with microporous surface areas up to 340 m2 g−1. Depending on the kind of carboxylic acid, the Ti : COOH ratio and the Ti : H2O ratio, either pillared layered or surface fractal 3D structures were obtained according to SAXS measurements. The most pronounced layered structure was found for 1,2,4,5-benzenetetrabenzoic acid and a Ti : H2O ratio of 4, while a Ti : H2O ratio of 2 resulted in a 3D structure. The use of 1,3,5-benzenetricarboxylic acid or 1,3,5-benzenetribenzoic acid resulted in similar structures which, however, were less pronounced and less ordered. The reaction of tetrakis(4-carboxyphenyl)silicon with Ti(OiPr)4 or benzenetribenzoic acid with Zr(OiPr)4 gave 3D structures for all Ti : H2O ratios.

Graphical abstract: Porous titanium and zirconium oxo carboxylates at the interface between sol–gel and metal–organic framework structures

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Article information


Submitted
16 May 2013
Accepted
10 Oct 2013
First published
24 Oct 2013

Dalton Trans., 2014,43, 950-957
Article type
Paper

Porous titanium and zirconium oxo carboxylates at the interface between sol–gel and metal–organic framework structures

C. Maurer, B. Baumgartner, S. Pabisch, J. Akbarzadeh, H. Peterlik and U. Schubert, Dalton Trans., 2014, 43, 950
DOI: 10.1039/C3DT51285A

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