Abstract
Zn(OAc)2(H2DEA) was synthesized by the reaction of zinc acetate dihydrate (Zn(OAc)2•2H2O) with diethanolamine (H2DEA), and was characterized using single-crystal X-ray structural analysis, nuclear magnetic resonance spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, and elemental analysis. Zn(OAc)2(H2DEA) had a trigonal bipyramidal geometry comprised of one zinc atom, two acetate groups, and one H2DEA as a neutral tridentate ligand to form two five-membered rings. The states of Zn(OAc)2(H2DEA) heated at various temperatures were determined by FT-IR spectroscopy. At 270 °C, the H2DEA ligand dissociated and was removed. The absorption bands assigned to Zn–O stretching vibration of Zn4O core such as the zinc-oxo cluster appeared. When heated at 500 °C, the absorption bands of μ4-oxozincate and the acetate group disappeared completely and hexagonal wurtzite structural ZnO was formed at 550 °C. A possible thermal decomposition pathway from Zn(OAc)2(H2DEA) to ZnO was proposed. The ZnO film was highly transparent and formed by the deposition of ZnO nanoparticles with size ~40 nm.
Highlights
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Zinc–diethanolamine complex was synthesized by the reaction of zinc acetate with diethanolamine.
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Zinc–diethanolamine complex was isolated and characterized.
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The formation mechanism of ZnO was estimated by FT-IR spectra.
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Acknowledgments
This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas “New Polymeric Materials Based on Element-Blocks” (No. 2401) (JSPS KAKENHI Grant Number JP24102008). This work was also supported by JSPS KAKENHI Grant Number JP16K17951.
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Hayami, R., Endo, N., Abe, T. et al. Zinc–diethanolamine complex: synthesis, characterization, and formation mechanism of zinc oxide via thermal decomposition. J Sol-Gel Sci Technol 87, 743–748 (2018). https://doi.org/10.1007/s10971-018-4768-x
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DOI: https://doi.org/10.1007/s10971-018-4768-x