Issue 28, 2006
From the journal:

Dalton Transactions

Precursor chemistry for TiO2: titanium complexes with a mixed nitrogen/oxygen ligand sphere†

Arne Baunemann,a   Malte Hellwig,a   Ashish Varade,b   Raghunandan K. Bhakta,a   Manuela Winter,a   S. A. Shivashankar,b   Roland A. Fischera  and  Anjana Devi*a  

* Corresponding authors

a Lehrstuhl für Anorganische Chemie II, Universitätsstr. 150, Ruhr-University Bochum, Bochum, Germany
E-mail: anjana.devi@ruhr-uni-bochum.de
Fax: +49 234 3214174
Tel: +49 234 3224174

b Materials Research Centre, Indian Insttute of Science, Bangalore, India

Abstract

Novel mixed amido–malonato complexes of titanium are reported. The complexes were synthesized by partially replacing the amido groups from the complexes [Ti(NMe2)4] and [Ti(NEt2)4] via Brønstedt acid/base reactions, using the malonate-ligands di-isopropylmalonate (Hdpml) and di-tert-butylmalonate (Hdbml). Four representative complexes were synthesized and fully characterised by 1H NMR, 13C NMR, CHN analysis and mass spectrometry. The crystal structures of the six-coordinated complexes [Ti(NMe2)2(dbml)2] (3) and [Ti(NEt2)2(dbml)2] (4) are presented and discussed. The complexes are solids and the chemical and thermal characteristics of the complexes strongly depend on the substitution at the malonate ligand. While dpml containing complexes show a promising behaviour for classical MOCVD, dbml containing complexes seem to be more suitable for liquid injection–metal–organic chemical vapour deposition (LI-MOCVD). Based on its thermal characteristics, the most promising complex for thermal CVD, [Ti(NEt2)2(dpml)2] (2) was selected for preliminary MOCVD experiments, which indicate a good suitability for the deposition of TiO2 thin films.

Graphical abstract: Precursor chemistry for TiO2: titanium complexes with a mixed nitrogen/oxygen ligand sphere

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Article information

DOI
https://doi.org/10.1039/B601995A
Article type
Paper
Submitted
09 Feb 2006
Accepted
24 Apr 2006
First published
27 Apr 2006

Dalton Trans., 2006, 3485-3490

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Precursor chemistry for TiO2: titanium complexes with a mixed nitrogen/oxygen ligand sphere

A. Baunemann, M. Hellwig, A. Varade, R. K. Bhakta, M. Winter, S. A. Shivashankar, R. A. Fischer and A. Devi, Dalton Trans., 2006, 3485 DOI: 10.1039/B601995A

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