Issue 30, 2021

Facile preparation of a cobalt diamine diketonate adduct as a potential vapor phase precursor for Co3O4films

Abstract

Co3O4 thin films and nanosystems are implemented in a broad range of functional systems, including gas sensors, (photo)catalysts, and electrochemical devices for energy applications. In this regard, chemical vapor deposition (CVD) is a promising route for the fabrication of high-quality films in which the precursor choice plays a key role in the process development. In this work, a heteroleptic cobalt complex bearing fluorinated diketonate ligands along with a diamine moiety [Co(tfa)2·TMEDA; tfa = 1,1,1-trifluoro-2,4-pentanedionate and TMEDA = N,N,N′,N′-tetramethylethylenediamine] is investigated as a potential Co molecular precursor for the CVD of Co3O4 systems. For the first time, the compound is characterized by crystal structure determination and comprehensive analytical studies, focusing also on its thermal properties and fragmentation patterns, important figures of merit for a CVD precursor. The outcomes of this investigation, accompanied by detailed theoretical studies, highlight its very favorable properties for CVD applications. In fact, growth experiments under oxygen atmospheres containing water vapor revealed the suitability of Co(tfa)2·TMEDA for the fabrication of high-quality, phase-pure Co3O4 thin films. The versatility of the proposed strategy in tailoring Co3O4 structural/morphological features highlights its potential to obtain multi-functional films with controllable properties for a variety of eventual technological end-uses.

Graphical abstract: Facile preparation of a cobalt diamine diketonate adduct as a potential vapor phase precursor for Co3O4films

Supplementary files

Article information

Article type
Paper
Submitted
20 မေ 2021
Accepted
27 ဇွန် 2021
First published
20 ဇူ 2021

Dalton Trans., 2021,50, 10374-10385

Facile preparation of a cobalt diamine diketonate adduct as a potential vapor phase precursor for Co3O4films

M. Klotzsche, D. Barreca, L. Bigiani, R. Seraglia, A. Gasparotto, L. Vanin, C. Jandl, A. Pöthig, M. Roverso, S. Bogialli, G. Tabacchi, E. Fois, E. Callone, S. Dirè and C. Maccato, Dalton Trans., 2021, 50, 10374 DOI: 10.1039/D1DT01650D

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