Towards single-source alkylzinc alkoxy and hydroxy precursors for ZnO nanoparticles. 

Michał Dutkiewicz 1Janusz Lewiński 1,2Elżbieta Krajewska 1Wojciech Bury 1Iwona Justyniak 2

1. Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, Warszawa 00-664, Poland
2. Polish Academy of Sciences, Institute of Physical Chemistry, Kasprzaka 44/52, Warszawa 01-224, Poland

Abstract

The nanochemistry of ZnO has been the focus of a number of research efforts for decades due to the unusual physical properties that are expected upon entering this size regime. Present big challenge for chemists is to develop tools for controlling nucleation, growth and morphology of nanoscaled ZnO particles. Various different physical and chemical synthetic approaches for preparation of ZnO nanoparticles were developed ranging from vapour phase synthesis, sol–gel chemistry, co-precipitation, solvothermal treatment to template syntheses. We are particularly interested in organometallic routes[1,2] which have recently been developed[3] and herein we communicate about the well-defined alkylzinc alkoxides [tBuZn(OtBu)]n and related hydroxides [tBuZn(OtBu)]x[tBuZn(OH)]y as novel efficient precursors for ZnO nanoparticles. We have discovered a new trimeric form of tert-butylzinc tert-butoxide and developed an effective method for separation of its various aggregates in the solid state. This achievement opens unique opportunities to study the effect of aggregation degree of the organometallic precursor on the character of ZnO particles prepared by thermolytic procedure under oxidative or inert atmosphere. In addition, the results of solution pyrolysis of the novel organometallic precursors under hydrolytic and rigorously anhydrous conditions will be presented. The resulting ZnO particles have been characterized by UV/VIS, PXRD and TEM measurements.

[1]  J. Lewiński, W. Bury, M. Dutkiewicz, M. Maurin, I. Justyniak, J. Lipkowski, Angew. Chem. Int. Ed., 2008, 47, 573.

[2]  J. Lewiński, K. Suwała, M. Kubisiak, Z. Ochal, I. Justyniak, J. Lipkowski, Angew. Chem. Int. Ed., 2008, 47, 7888.

[3]  M.L. Kahn, A. Glaria, C. Pages, M. Monge, L.S. Macary, A. Maisonnat, B. Chaudret, J. Mater. Chem., 2009, 19, 4044.

 

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Presentation: Poster at E-MRS Fall Meeting 2009, Symposium C, by Michał Dutkiewicz
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-07-21 12:20
Revised:   2009-08-09 11:29