Preparation of anatase TiO2 thin films with (O iPr)2Ti(CH3COCHCONEt2)2 precursor by MOCVD

Byoung Jae Bae, Kwangyeol Lee, Won Seok Seo, Md Arzu Miah, Keun Chong Kim, Joon T. Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The reaction of titanium tetraisopropoxide with 2 equiv of N,N-diethyl acetoacetamide affords Ti(O'Pr)2(CH3COCHCONEt 2)2 (1) as colorless crystals in 80% yield. Compound 1 is characterized by spectroscopic (Mass and 1H/13C NMR) and microanalytical data. Molecular structure of 1 has been determined by a single crystal X-ray diffraction study, which reveals that it is a monomeric, cis-diisopropoxide and contains a six coordinate Ti(IV) atom with a cis(CONEt2), trans(COCH3) configuration (1a) in a distorted octahedral environment. Variable-temperature 1H NMR spectra of 1 indicate that it exists as an equilibrium mixture of cis,trans(1a) and cis,cis(1b) isomers in a 0.57:0.43 ratio at -20°C in toluene-d8 solution. Thermal properties of 1 as a MOCVD precursor for titanium dioxide films have been evaluated by thermal gravimetric analysis and vapor pressure measurement. Thin films of pure anatase titanium dioxide (after annealing above 500 °C under oxygen) have been grown on Si(100) with precursor 1 in the substrate temperature range of 350-500 °C using a bubbler-based MOCVD method.

Original languageEnglish
Pages (from-to)1661-1666
Number of pages6
JournalBulletin of the Korean Chemical Society
Volume25
Issue number11
Publication statusPublished - 2004 Nov 20

Keywords

  • β-Keto amide ligand
  • MOCVD
  • Thin films
  • Ti precursor
  • Titanium dioxide (TiO)

ASJC Scopus subject areas

  • Chemistry(all)

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    Bae, B. J., Lee, K., Seo, W. S., Miah, M. A., Kim, K. C., & Park, J. T. (2004). Preparation of anatase TiO2 thin films with (O iPr)2Ti(CH3COCHCONEt2)2 precursor by MOCVD. Bulletin of the Korean Chemical Society, 25(11), 1661-1666.