Synthesis and crystal structures of two new titanium alkoxy-diolate complexes. Potential precursors for oxide ceramics

Anthony C. Jones; Paul A. Williams; Jamie F. Bickley; Alexander Steiner; Hywel O. Davies; Timothy J. Leedham; Amir Awaluddin; Martyn E. Pemble; Gary W. Critchlow

doi:10.1039/b100411p

Synthesis and crystal structures of two new titanium alkoxy-diolate complexes. Potential precursors for oxide ceramics

Anthony C. Jones
, Paul A. Williams
, Jamie F. Bickley
, Alexander Steiner
, Hywel O. Davies
, Timothy J. Leedham
, Amir Awaluddin
, Martyn E. Pemble
, Gary W. Critchlow

Research output: Contribution to journal › Article › peer-review

Abstract

The new titanium alkoxy-diolate precursors [Ti(OCH₂CH₂O)(OCH₂CH₂ NMe₂)₂]₂ (1) and [Ti(OCMe₂CMe₂O)(OCH₂CH₂ NMe₂)₂]₂ (2) have been prepared and structurally characterised by single crystal X-ray diffraction. Both compounds exhibit binuclear centrosymmetric structures with bridging alkoxide groups, containing two six-coordinate Ti atoms in distorted octahedral environments. In (1) the oxygen from the ethylene glycolate ligand is involved in bridging, whereas in (2) the bridging oxygen is provided by the dimethylamino ethoxide ligand. Complexes (1) and (2) are potential precursors for Ti-containing oxides and both complexes have been investigated as precursors for the deposition of TiO₂ thin films by liquid injection metalorganic chemical vapour deposition (MOCVD). Significantly, only complex (2) led to reproducible TiO₂ deposition in the temperature range 325-450°C, whilst complex (1) exhibited a marked pre-reaction leading to highly irreproducible film growth. The difference in MOCVD behaviour between the complexes is rationalised in terms of their molecular structure.

Original language	English
Pages (from-to)	1428-1433
Number of pages	6
Journal	Journal of Materials Chemistry
Volume	11
Issue number	5
DOIs	https://doi.org/10.1039/b100411p
Publication status	Published - 2001

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@article{a720d6fd3285458e90f8214cb6df7a79,

title = "Synthesis and crystal structures of two new titanium alkoxy-diolate complexes. Potential precursors for oxide ceramics",

abstract = "The new titanium alkoxy-diolate precursors [Ti(OCH2CH2O)(OCH2CH2 NMe2)2]2 (1) and [Ti(OCMe2CMe2O)(OCH2CH2 NMe2)2]2 (2) have been prepared and structurally characterised by single crystal X-ray diffraction. Both compounds exhibit binuclear centrosymmetric structures with bridging alkoxide groups, containing two six-coordinate Ti atoms in distorted octahedral environments. In (1) the oxygen from the ethylene glycolate ligand is involved in bridging, whereas in (2) the bridging oxygen is provided by the dimethylamino ethoxide ligand. Complexes (1) and (2) are potential precursors for Ti-containing oxides and both complexes have been investigated as precursors for the deposition of TiO2 thin films by liquid injection metalorganic chemical vapour deposition (MOCVD). Significantly, only complex (2) led to reproducible TiO2 deposition in the temperature range 325-450°C, whilst complex (1) exhibited a marked pre-reaction leading to highly irreproducible film growth. The difference in MOCVD behaviour between the complexes is rationalised in terms of their molecular structure.",

author = "Jones, \{Anthony C.\} and Williams, \{Paul A.\} and Bickley, \{Jamie F.\} and Alexander Steiner and Davies, \{Hywel O.\} and Leedham, \{Timothy J.\} and Amir Awaluddin and Pemble, \{Martyn E.\} and Critchlow, \{Gary W.\}",

year = "2001",

doi = "10.1039/b100411p",

language = "English",

volume = "11",

pages = "1428--1433",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

number = "5",

}

TY - JOUR

T1 - Synthesis and crystal structures of two new titanium alkoxy-diolate complexes. Potential precursors for oxide ceramics

AU - Jones, Anthony C.

AU - Williams, Paul A.

AU - Bickley, Jamie F.

AU - Steiner, Alexander

AU - Davies, Hywel O.

AU - Leedham, Timothy J.

AU - Awaluddin, Amir

AU - Pemble, Martyn E.

AU - Critchlow, Gary W.

PY - 2001

Y1 - 2001

N2 - The new titanium alkoxy-diolate precursors [Ti(OCH2CH2O)(OCH2CH2 NMe2)2]2 (1) and [Ti(OCMe2CMe2O)(OCH2CH2 NMe2)2]2 (2) have been prepared and structurally characterised by single crystal X-ray diffraction. Both compounds exhibit binuclear centrosymmetric structures with bridging alkoxide groups, containing two six-coordinate Ti atoms in distorted octahedral environments. In (1) the oxygen from the ethylene glycolate ligand is involved in bridging, whereas in (2) the bridging oxygen is provided by the dimethylamino ethoxide ligand. Complexes (1) and (2) are potential precursors for Ti-containing oxides and both complexes have been investigated as precursors for the deposition of TiO2 thin films by liquid injection metalorganic chemical vapour deposition (MOCVD). Significantly, only complex (2) led to reproducible TiO2 deposition in the temperature range 325-450°C, whilst complex (1) exhibited a marked pre-reaction leading to highly irreproducible film growth. The difference in MOCVD behaviour between the complexes is rationalised in terms of their molecular structure.

AB - The new titanium alkoxy-diolate precursors [Ti(OCH2CH2O)(OCH2CH2 NMe2)2]2 (1) and [Ti(OCMe2CMe2O)(OCH2CH2 NMe2)2]2 (2) have been prepared and structurally characterised by single crystal X-ray diffraction. Both compounds exhibit binuclear centrosymmetric structures with bridging alkoxide groups, containing two six-coordinate Ti atoms in distorted octahedral environments. In (1) the oxygen from the ethylene glycolate ligand is involved in bridging, whereas in (2) the bridging oxygen is provided by the dimethylamino ethoxide ligand. Complexes (1) and (2) are potential precursors for Ti-containing oxides and both complexes have been investigated as precursors for the deposition of TiO2 thin films by liquid injection metalorganic chemical vapour deposition (MOCVD). Significantly, only complex (2) led to reproducible TiO2 deposition in the temperature range 325-450°C, whilst complex (1) exhibited a marked pre-reaction leading to highly irreproducible film growth. The difference in MOCVD behaviour between the complexes is rationalised in terms of their molecular structure.

UR - https://www.scopus.com/pages/publications/0035024010

U2 - 10.1039/b100411p

DO - 10.1039/b100411p

M3 - Article

AN - SCOPUS:0035024010

SN - 0959-9428

VL - 11

SP - 1428

EP - 1433

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 5

ER -

Synthesis and crystal structures of two new titanium alkoxy-diolate complexes. Potential precursors for oxide ceramics

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