Hoffmann Rudolf C, Sanctis Shawn, Schneider Jörg J
Fachbereich Chemie, Eduard-Zintl-Institut, Fachgebiet Anorganische Chemie, Technische Universität Darmstadt , Alarich-Weiss-Straße 12, 64287 Darmstadt, Germany.
Inorg Chem. 2017 Jul 3;56(13):7550-7557. doi: 10.1021/acs.inorgchem.7b01088. Epub 2017 Jun 9.
Zinc complexes with multidentate Schiff base ligands are suitable precursors for ZnO in microwave-assisted transformation reactions. [Bis(acetylacetonato)ethylenediimine]zinc(II) and [bis(methylacetoacetato)ethylenediimine]zinc(II) have been synthesized with high purity and good yield from the direct reaction of the respective diimine ligand with diethylzinc in tetrahydrofuran. The thermal decay is studied by thermogravimetry coupled with online infrared spectroscopy. The ceramization reaction in ethoxyethanol yields stable dispersions of spherical ZnO nanoparticles with very small particle sizes (around 5-6 nm), which can be employed for coating and thin-film deposition processes. Field-effect transistors (FETs) composed of thin films fabricated from these semiconducting ZnO particles possess charge-carrier mobilities of 6.0 × 10 and 5.4 × 10 cm/(V s) after processing at 350 and 450 °C, respectively. Electrophoretic deposition affords dense film coatings composed of these ZnO nanoparticles with thicknesses of 30-90 nm on ITO (indium tin oxide) glass-electrodes. The positive ζ-potentials of the ZnO nanoparticles in these dispersions are in agreement with the electrocoating process at the cathode.
锌与多齿席夫碱配体形成的配合物是微波辅助转化反应中制备氧化锌的合适前驱体。[双（乙酰丙酮）乙二胺]锌（II）和[双（甲基乙酰乙酸）乙二胺]锌（II）已通过相应的二胺配体与二乙基锌在四氢呋喃中的直接反应以高纯度和良好产率合成。通过热重分析法结合在线红外光谱法研究热分解。在乙氧基乙醇中的陶瓷化反应产生粒径非常小（约5 - 6纳米）的球形氧化锌纳米颗粒的稳定分散体，可用于涂层和薄膜沉积工艺。由这些半导体氧化锌颗粒制成的薄膜组成的场效应晶体管（FET）在350和450℃处理后分别具有6.0×10和5.4×10 cm²/（V·s）的载流子迁移率。电泳沉积在氧化铟锡（ITO）玻璃电极上提供由这些氧化锌纳米颗粒组成的致密薄膜涂层，厚度为30 - 90纳米。这些分散体中氧化锌纳米颗粒的正ζ电位与阴极处的电沉积过程一致。
